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Author SHA1 Message Date
Ian Rogers
8ab12a2038 perf callchain: Use pthread keys for tls callchain_cursor 
Pthread keys are more portable than __thread and allow the association
of a destructor with the key. Use the destructor to clean up TLS
callchain cursors to aid understanding memory leaks.

Committer notes:

Had to fixup a series of unconverted places and also check for the
return of get_tls_callchain_cursor() as it may fail and return NULL.

In that unlikely case we now either print something to a file, if the
caller was expecting to print a callchain, or return an error code to
state that resolving the callchain isn't possible.

In some cases this was made easier because thread__resolve_callchain()
already can fail for other reasons, so this new one (cursor == NULL) can
be added and the callers don't have to explicitely check for this new
condition.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ali Saidi <alisaidi@amazon.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Brian Robbins <brianrob@linux.microsoft.com>
Cc: Changbin Du <changbin.du@huawei.com>
Cc: Dmitrii Dolgov <9erthalion6@gmail.com>
Cc: Fangrui Song <maskray@google.com>
Cc: German Gomez <german.gomez@arm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Ivan Babrou <ivan@cloudflare.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jing Zhang <renyu.zj@linux.alibaba.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: K Prateek Nayak <kprateek.nayak@amd.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Miguel Ojeda <ojeda@kernel.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Steinar H. Gunderson <sesse@google.com>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Wenyu Liu <liuwenyu7@huawei.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yang Jihong <yangjihong1@huawei.com>
Cc: Ye Xingchen <ye.xingchen@zte.com.cn>
Cc: Yuan Can <yuancan@huawei.com>
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20230608232823.4027869-25-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2023-06-12 15:57:54 -03:00
Ian Rogers
0dd5041c9a perf addr_location: Add init/exit/copy functions 
struct addr_location holds references to multiple reference counted
objects. Add init/exit functions to make maintenance of those more
consistent with the rest of the code and to try to avoid
leaks. Modification of thread reference counts isn't included in this
change.

Committer notes:

I needed to initialize result to sample->ip to make sure is set to
something, fixing a compile time error, mostly keeping the previous
logic as build_alloc_func_list() already does debugging/error prints
about what went wrong if it takes the 'goto out'.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ali Saidi <alisaidi@amazon.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Brian Robbins <brianrob@linux.microsoft.com>
Cc: Changbin Du <changbin.du@huawei.com>
Cc: Dmitrii Dolgov <9erthalion6@gmail.com>
Cc: Fangrui Song <maskray@google.com>
Cc: German Gomez <german.gomez@arm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Ivan Babrou <ivan@cloudflare.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jing Zhang <renyu.zj@linux.alibaba.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: K Prateek Nayak <kprateek.nayak@amd.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Miguel Ojeda <ojeda@kernel.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Steinar H. Gunderson <sesse@google.com>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Wenyu Liu <liuwenyu7@huawei.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yang Jihong <yangjihong1@huawei.com>
Cc: Ye Xingchen <ye.xingchen@zte.com.cn>
Cc: Yuan Can <yuancan@huawei.com>
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20230608232823.4027869-7-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2023-06-12 15:57:53 -03:00
Ian Rogers
f12ad2727b perf util: Move input_name to util 
'input_name' is the name of the input perf.data file, it is used by data
convert and ui code. Move it to util to make it more consistent with
other global state.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Chengdong Li <chengdongli@tencent.com>
Cc: Denis Nikitin <denik@chromium.org>
Cc: Florian Fischer <florian.fischer@muhq.space>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Martin Liška <mliska@suse.cz>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Raul Silvera <rsilvera@google.com>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Rob Herring <robh@kernel.org>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Xing Zhengjun <zhengjun.xing@linux.intel.com>
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20230410162511.3055900-2-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2023-04-10 19:21:31 -03:00
Ian Rogers
378ef0f5d9 perf build: Use libtraceevent from the system 
Remove the LIBTRACEEVENT_DYNAMIC and LIBTRACEFS_DYNAMIC make command
line variables.

If libtraceevent isn't installed or NO_LIBTRACEEVENT=1 is passed to the
build, don't compile in libtraceevent and libtracefs support.

This also disables CONFIG_TRACE that controls "perf trace".

CONFIG_LIBTRACEEVENT is used to control enablement in Build/Makefiles,
HAVE_LIBTRACEEVENT is used in C code.

Without HAVE_LIBTRACEEVENT tracepoints are disabled and as such the
commands kmem, kwork, lock, sched and timechart are removed.  The
majority of commands continue to work including "perf test".

Committer notes:

Fixed up a tools/perf/util/Build reject and added:

  #include <traceevent/event-parse.h>

to tools/perf/util/scripting-engines/trace-event-perl.c.

Committer testing:

  $ rpm -qi libtraceevent-devel
  Name        : libtraceevent-devel
  Version     : 1.5.3
  Release     : 2.fc36
  Architecture: x86_64
  Install Date: Mon 25 Jul 2022 03:20:19 PM -03
  Group       : Unspecified
  Size        : 27728
  License     : LGPLv2+ and GPLv2+
  Signature   : RSA/SHA256, Fri 15 Apr 2022 02:11:58 PM -03, Key ID 999f7cbf38ab71f4
  Source RPM  : libtraceevent-1.5.3-2.fc36.src.rpm
  Build Date  : Fri 15 Apr 2022 10:57:01 AM -03
  Build Host  : buildvm-x86-05.iad2.fedoraproject.org
  Packager    : Fedora Project
  Vendor      : Fedora Project
  URL         : https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
  Bug URL     : https://bugz.fedoraproject.org/libtraceevent
  Summary     : Development headers of libtraceevent
  Description :
  Development headers of libtraceevent-libs
  $

Default build:

  $ ldd ~/bin/perf | grep tracee
  	libtraceevent.so.1 => /lib64/libtraceevent.so.1 (0x00007f1dcaf8f000)
  $

  # perf trace -e sched:* --max-events 10
       0.000 migration/0/17 sched:sched_migrate_task(comm: "", pid: 1603763 (perf), prio: 120, dest_cpu: 1)
       0.005 migration/0/17 sched:sched_wake_idle_without_ipi(cpu: 1)
       0.011 migration/0/17 sched:sched_switch(prev_comm: "", prev_pid: 17 (migration/0), prev_state: 1, next_comm: "", next_prio: 120)
       1.173 :0/0 sched:sched_wakeup(comm: "", pid: 3138 (gnome-terminal-), prio: 120)
       1.180 :0/0 sched:sched_switch(prev_comm: "", prev_prio: 120, next_comm: "", next_pid: 3138 (gnome-terminal-), next_prio: 120)
       0.156 migration/1/21 sched:sched_migrate_task(comm: "", pid: 1603763 (perf), prio: 120, orig_cpu: 1, dest_cpu: 2)
       0.160 migration/1/21 sched:sched_wake_idle_without_ipi(cpu: 2)
       0.166 migration/1/21 sched:sched_switch(prev_comm: "", prev_pid: 21 (migration/1), prev_state: 1, next_comm: "", next_prio: 120)
       1.183 :0/0 sched:sched_wakeup(comm: "", pid: 1602985 (kworker/u16:0-f), prio: 120, target_cpu: 1)
       1.186 :0/0 sched:sched_switch(prev_comm: "", prev_prio: 120, next_comm: "", next_pid: 1602985 (kworker/u16:0-f), next_prio: 120)
  #

Had to tweak tools/perf/util/setup.py to make sure the python binding
shared object links with libtraceevent if -DHAVE_LIBTRACEEVENT is
present in CFLAGS.

Building with NO_LIBTRACEEVENT=1 uncovered some more build failures:

- Make building of data-convert-bt.c to CONFIG_LIBTRACEEVENT=y

- perf-$(CONFIG_LIBTRACEEVENT) += scripts/

- bpf_kwork.o needs also to be dependent on CONFIG_LIBTRACEEVENT=y

- The python binding needed some fixups and util/trace-event.c can't be
  built and linked with the python binding shared object, so remove it
  in tools/perf/util/setup.py and exclude it from the list of
  dependencies in the python/perf.so Makefile.perf target.

Building without libtraceevent-devel installed uncovered more build
failures:

- The python binding tools/perf/util/python.c was assuming that
  traceevent/parse-events.h was always available, which was the case
  when we defaulted to using the in-kernel tools/lib/traceevent/ files,
  now we need to enclose it under ifdef HAVE_LIBTRACEEVENT, just like
  the other parts of it that deal with tracepoints.

- We have to ifdef the rules in the Build files with
  CONFIG_LIBTRACEEVENT=y to build builtin-trace.c and
  tools/perf/trace/beauty/ as we only ifdef setting CONFIG_TRACE=y when
  setting NO_LIBTRACEEVENT=1 in the make command line, not when we don't
  detect libtraceevent-devel installed in the system. Simplification here
  to avoid these two ways of disabling builtin-trace.c and not having
  CONFIG_TRACE=y when libtraceevent-devel isn't installed is the clean
  way.

From Athira:

<quote>
tools/perf/arch/powerpc/util/Build
-perf-y += kvm-stat.o
+perf-$(CONFIG_LIBTRACEEVENT) += kvm-stat.o
</quote>

Then, ditto for arm64 and s390, detected by container cross build tests.

- s/390 uses test__checkevent_tracepoint() that is now only available if
  HAVE_LIBTRACEEVENT is defined, enclose the callsite with ifder HAVE_LIBTRACEEVENT.

Also from Athira:

<quote>
With this change, I could successfully compile in these environment:
- Without libtraceevent-devel installed
- With libtraceevent-devel installed
- With “make NO_LIBTRACEEVENT=1”
</quote>

Then, finally rename CONFIG_TRACEEVENT to CONFIG_LIBTRACEEVENT for
consistency with other libraries detected in tools/perf/.

Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Tested-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: bpf@vger.kernel.org
Link: http://lore.kernel.org/lkml/20221205225940.3079667-3-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2022-12-14 11:16:12 -03:00
Sean Christopherson
49bd97c28b perf tools: Use dedicated non-atomic clear/set bit helpers 
Use the dedicated non-atomic helpers for {clear,set}_bit() and their
test variants, i.e. the double-underscore versions.  Depsite being
defined in atomic.h, and despite the kernel versions being atomic in the
kernel, tools' {clear,set}_bit() helpers aren't actually atomic.  Move
to the double-underscore versions so that the versions that are expected
to be atomic (for kernel developers) can be made atomic without
affecting users that don't want atomic operations.

No functional change intended.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: James Morse <james.morse@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Oliver Upton <oliver.upton@linux.dev>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Yury Norov <yury.norov@gmail.com>
Cc: alexandru elisei <alexandru.elisei@arm.com>
Cc: kvm@vger.kernel.org
Cc: kvmarm@lists.cs.columbia.edu
Cc: kvmarm@lists.linux.dev
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lore.kernel.org/lkml/20221119013450.2643007-6-seanjc@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2022-12-05 09:29:06 -03:00
Arnaldo Carvalho de Melo
628d69995e perf kwork: Remove includes not needed in kwork.h 
Leave just some forward declarations for pointers, move the includes to
where they are really needed.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2022-10-31 11:06:46 -03:00
Yang Jihong
daf07d2207 perf kwork: Implement BPF trace 
'perf record' generates perf.data, which generates extra interrupts
for hard disk, amount of data to be collected increases with time.

Using eBPF trace can process the data in kernel, which solves the
preceding two problems.

Add -b/--use-bpf option for latency and report to support
tracing kwork events using eBPF:

1. Create bpf prog and attach to tracepoints,
2. Start tracing after command is entered,
3. After user hit "ctrl+c", stop tracing and report,
4. Support CPU and name filtering.

This commit implements the framework code and
does not add specific event support.

Test cases:

  # perf kwork rep -h

   Usage: perf kwork report [<options>]

      -b, --use-bpf         Use BPF to measure kwork runtime
      -C, --cpu <cpu>       list of cpus to profile
      -i, --input <file>    input file name
      -n, --name <name>     event name to profile
      -s, --sort <key[,key2...]>
                            sort by key(s): runtime, max, count
      -S, --with-summary    Show summary with statistics
          --time <str>      Time span for analysis (start,stop)

  # perf kwork lat -h

   Usage: perf kwork latency [<options>]

      -b, --use-bpf         Use BPF to measure kwork latency
      -C, --cpu <cpu>       list of cpus to profile
      -i, --input <file>    input file name
      -n, --name <name>     event name to profile
      -s, --sort <key[,key2...]>
                            sort by key(s): avg, max, count
          --time <str>      Time span for analysis (start,stop)

  # perf kwork lat -b
  Unsupported bpf trace class irq

  # perf kwork rep -b
  Unsupported bpf trace class irq

Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220709015033.38326-15-yangjihong1@huawei.com
[ Simplify work_findnew() ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2022-07-26 16:31:54 -03:00
Yang Jihong
bcc8b3e88d perf kwork: Implement perf kwork timehist 
Implements framework of perf kwork timehist,
to provide an analysis of kernel work events.

Test cases:

  # perf kwork tim
   Runtime start      Runtime end        Cpu     Kwork name                      Runtime     Delaytime
                                                 (TYPE)NAME:NUM                  (msec)      (msec)
   -----------------  -----------------  ------  ------------------------------  ----------  ----------
        91576.060290       91576.060344  [0000]  (s)RCU:9                             0.055       0.111
        91576.061470       91576.061547  [0000]  (s)SCHED:7                           0.077       0.073
        91576.062604       91576.062697  [0001]  (s)RCU:9                             0.094       0.409
        91576.064443       91576.064517  [0002]  (s)RCU:9                             0.074       0.114
        91576.065144       91576.065211  [0000]  (s)SCHED:7                           0.067       0.058
        91576.066564       91576.066609  [0003]  (s)RCU:9                             0.045       0.110
        91576.068495       91576.068559  [0000]  (s)SCHED:7                           0.064       0.059
        91576.068900       91576.068996  [0004]  (s)RCU:9                             0.096       0.726
        91576.069364       91576.069420  [0002]  (s)RCU:9                             0.056       0.082
        91576.069649       91576.069701  [0004]  (s)RCU:9                             0.052       0.111
        91576.070147       91576.070206  [0000]  (s)SCHED:7                           0.060       0.057
        91576.073147       91576.073202  [0000]  (s)SCHED:7                           0.054       0.060
  <SNIP>

  # perf kwork tim --max-stack 2 -g
   Runtime start      Runtime end        Cpu     Kwork name                      Runtime     Delaytime
                                                 (TYPE)NAME:NUM                  (msec)      (msec)
   -----------------  -----------------  ------  ------------------------------  ----------  ----------
        91576.060290       91576.060344  [0000]  (s)RCU:9                             0.055       0.111   irq_exit_rcu <- sysvec_apic_timer_interrupt
        91576.061470       91576.061547  [0000]  (s)SCHED:7                           0.077       0.073   irq_exit_rcu <- sysvec_call_function_single
        91576.062604       91576.062697  [0001]  (s)RCU:9                             0.094       0.409   irq_exit_rcu <- sysvec_apic_timer_interrupt
        91576.064443       91576.064517  [0002]  (s)RCU:9                             0.074       0.114   irq_exit_rcu <- sysvec_apic_timer_interrupt
        91576.065144       91576.065211  [0000]  (s)SCHED:7                           0.067       0.058   irq_exit_rcu <- sysvec_call_function_single
        91576.066564       91576.066609  [0003]  (s)RCU:9                             0.045       0.110   irq_exit_rcu <- sysvec_apic_timer_interrupt
        91576.068495       91576.068559  [0000]  (s)SCHED:7                           0.064       0.059   irq_exit_rcu <- sysvec_call_function_single
        91576.068900       91576.068996  [0004]  (s)RCU:9                             0.096       0.726   irq_exit_rcu <- sysvec_apic_timer_interrupt
        91576.069364       91576.069420  [0002]  (s)RCU:9                             0.056       0.082   irq_exit_rcu <- sysvec_apic_timer_interrupt
        91576.069649       91576.069701  [0004]  (s)RCU:9                             0.052       0.111   irq_exit_rcu <- sysvec_apic_timer_interrupt
  <SNIP>

Committer testing:

  # perf kwork -k workqueue timehist | head -40
   Runtime start      Runtime end        Cpu     Kwork name                      Runtime     Delaytime
                                                 (TYPE)NAME:NUM                  (msec)      (msec)
   -----------------  -----------------  ------  ------------------------------  ----------  ----------
        26520.211825       26520.211832  [0019]  (w)free_work                         0.007       0.004
        26520.212929       26520.212934  [0020]  (w)free_work                         0.005       0.004
        26520.213226       26520.213228  [0014]  (w)kfree_rcu_work                    0.002       0.004
        26520.214057       26520.214061  [0021]  (w)free_work                         0.004       0.004
        26520.221239       26520.221241  [0007]  (w)kfree_rcu_work                    0.002       0.009
        26520.223232       26520.223238  [0013]  (w)psi_avgs_work                     0.005       0.006
        26520.230057       26520.230060  [0020]  (w)free_work                         0.003       0.003
        26520.270428       26520.270434  [0015]  (w)free_work                         0.006       0.004
        26520.270546       26520.270550  [0014]  (w)free_work                         0.004       0.003
        26520.281626       26520.281629  [0015]  (w)free_work                         0.003       0.002
        26520.287225       26520.287230  [0012]  (w)psi_avgs_work                     0.005       0.008
        26520.287231       26520.287235  [0001]  (w)psi_avgs_work                     0.004       0.011
        26520.287236       26520.287239  [0001]  (w)psi_avgs_work                     0.003       0.012
        26520.329488       26520.329492  [0024]  (w)free_work                         0.004       0.004
        26520.330600       26520.330605  [0007]  (w)free_work                         0.005       0.004
        26520.334218       26520.334218  [0007]  (w)kfree_rcu_monitor                 0.001       0.002
        26520.335220       26520.335221  [0005]  (w)kfree_rcu_monitor                 0.001       0.004
        26520.343980       26520.343985  [0007]  (w)free_work                         0.005       0.002
        26520.345093       26520.345097  [0006]  (w)free_work                         0.004       0.003
        26520.351233       26520.351238  [0027]  (w)psi_avgs_work                     0.005       0.008
        26520.353228       26520.353229  [0007]  (w)kfree_rcu_work                    0.001       0.002
        26520.353229       26520.353231  [0005]  (w)kfree_rcu_work                    0.001       0.006
        26520.382381       26520.382383  [0006]  (w)free_work                         0.003       0.002
        26520.386547       26520.386548  [0006]  (w)free_work                         0.002       0.001
        26520.391243       26520.391245  [0015]  (w)console_callback                  0.002       0.016
        26520.415369       26520.415621  [0027]  (w)btrfs_work_helper                 0.252
        26520.415351       26520.416174  [0002]  (w)btrfs_work_helper                 0.823       0.037
        26520.415343       26520.416304  [0031]  (w)btrfs_work_helper                 0.961
        26520.415335       26520.417078  [0001]  (w)btrfs_work_helper                 1.743
        26520.415250       26520.417564  [0002]  (w)wb_workfn                         2.314
        26520.424777       26520.424787  [0002]  (w)btrfs_work_helper                 0.010
        26520.424788       26520.424798  [0002]  (w)btrfs_work_helper                 0.010
        26520.424790       26520.424805  [0001]  (w)btrfs_work_helper                 0.016       0.016
        26520.424801       26520.424807  [0002]  (w)btrfs_work_helper                 0.006
        26520.424809       26520.424831  [0002]  (w)btrfs_work_helper                 0.022       0.030
        26520.424824       26520.424835  [0027]  (w)btrfs_work_helper                 0.011
        26520.424809       26520.424867  [0001]  (w)btrfs_work_helper                 0.059       0.032
  #

Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220709015033.38326-14-yangjihong1@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2022-07-26 16:31:54 -03:00
Yang Jihong
53e49e32ae perf kwork: Add workqueue latency support 
Implements workqueue latency function.

Test cases:

  # perf kwork -k workqueue lat

    Kwork Name                     | Cpu  | Avg delay     | Count     | Max delay     | Max delay start     | Max delay end       |
   --------------------------------------------------------------------------------------------------------------------------------
    (w)vmstat_update               | 0001 |      5.004 ms |         1 |      5.004 ms |      44001.745646 s |      44001.750650 s |
    (w)vmstat_update               | 0006 |      1.773 ms |         1 |      1.773 ms |      44000.830840 s |      44000.832613 s |
    (w)vmstat_shepherd             | 0000 |      0.992 ms |         8 |      2.474 ms |      44007.717845 s |      44007.720318 s |
    (w)vmstat_update               | 0000 |      0.974 ms |         5 |      2.624 ms |      44004.785970 s |      44004.788594 s |
    (w)e1000_watchdog              | 0002 |      0.687 ms |         5 |      2.632 ms |      44005.009334 s |      44005.011966 s |
    (w)vmstat_update               | 0002 |      0.307 ms |         1 |      0.307 ms |      44004.817395 s |      44004.817702 s |
    (w)vmstat_update               | 0004 |      0.296 ms |         1 |      0.296 ms |      43997.913677 s |      43997.913973 s |
    (w)mix_interrupt_randomness    | 0000 |      0.283 ms |       285 |      3.724 ms |      44006.790889 s |      44006.794613 s |
    (w)neigh_managed_work          | 0001 |      0.271 ms |         1 |      0.271 ms |      43997.665542 s |      43997.665813 s |
    (w)vmstat_update               | 0005 |      0.261 ms |         1 |      0.261 ms |      44007.820542 s |      44007.820803 s |
    (w)neigh_managed_work          | 0004 |      0.220 ms |         1 |      0.220 ms |      44002.953287 s |      44002.953507 s |
    (w)neigh_periodic_work         | 0004 |      0.217 ms |         1 |      0.217 ms |      43999.929718 s |      43999.929935 s |
    (w)mix_interrupt_randomness    | 0002 |      0.199 ms |         5 |      0.310 ms |      44005.012316 s |      44005.012625 s |
    (w)vmstat_update               | 0003 |      0.199 ms |         4 |      0.307 ms |      44005.714391 s |      44005.714699 s |
    (w)gc_worker                   | 0001 |      0.071 ms |       173 |      1.128 ms |      44002.062579 s |      44002.063707 s |
   --------------------------------------------------------------------------------------------------------------------------------
    INFO: 0.020% skipped events (17 including 10 raise, 7 entry, 0 exit)

Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220709015033.38326-13-yangjihong1@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2022-07-26 16:31:54 -03:00
Yang Jihong
19807bba5a perf kwork: Add softirq latency support 
Implements softirq latency function.

Test cases:

  # perf kwork -k softirq lat

    Kwork Name                     | Cpu  | Avg delay     | Count     | Max delay     | Max delay start     | Max delay end       |
   --------------------------------------------------------------------------------------------------------------------------------
    (s)TIMER:1                     | 0006 |      1.048 ms |         1 |      1.048 ms |      44000.829759 s |      44000.830807 s |
    (s)TIMER:1                     | 0001 |      1.008 ms |         4 |      3.434 ms |      43997.662069 s |      43997.665503 s |
    (s)RCU:9                       | 0006 |      0.675 ms |         7 |      1.328 ms |      43997.670304 s |      43997.671632 s |
    (s)RCU:9                       | 0000 |      0.414 ms |       701 |      3.996 ms |      43997.661170 s |      43997.665167 s |
    (s)RCU:9                       | 0005 |      0.245 ms |        88 |      1.866 ms |      43997.683105 s |      43997.684971 s |
    (s)SCHED:7                     | 0000 |      0.158 ms |       677 |      2.639 ms |      44004.785716 s |      44004.788355 s |
    ... <SNIP> ...
    (s)RCU:9                       | 0002 |      0.141 ms |       932 |      1.662 ms |      44005.010206 s |      44005.011868 s |
    (s)RCU:9                       | 0003 |      0.129 ms |      2193 |      1.507 ms |      44006.010208 s |      44006.011715 s |
    (s)TIMER:1                     | 0005 |      0.128 ms |         1 |      0.128 ms |      44007.820346 s |      44007.820474 s |
    (s)SCHED:7                     | 0002 |      0.040 ms |      1731 |      0.211 ms |      44005.009237 s |      44005.009447 s |
   --------------------------------------------------------------------------------------------------------------------------------

  # perf kwork -k softirq lat -C 1,2

    Kwork Name                     | Cpu  | Avg delay     | Count     | Max delay     | Max delay start     | Max delay end       |
   --------------------------------------------------------------------------------------------------------------------------------
    (s)TIMER:1                     | 0001 |      1.008 ms |         4 |      3.434 ms |      43997.662069 s |      43997.665503 s |
    (s)RCU:9                       | 0001 |      0.216 ms |      1619 |      3.659 ms |      43997.662069 s |      43997.665727 s |
    (s)RCU:9                       | 0002 |      0.141 ms |       932 |      1.662 ms |      44005.010206 s |      44005.011868 s |
    (s)NET_RX:3                    | 0002 |      0.106 ms |         5 |      0.163 ms |      44005.012255 s |      44005.012418 s |
    (s)TIMER:1                     | 0002 |      0.084 ms |         9 |      0.114 ms |      44005.009168 s |      44005.009282 s |
    (s)SCHED:7                     | 0001 |      0.049 ms |       655 |      0.837 ms |      44005.707998 s |      44005.708835 s |
    (s)SCHED:7                     | 0002 |      0.040 ms |      1731 |      0.211 ms |      44005.009237 s |      44005.009447 s |
   --------------------------------------------------------------------------------------------------------------------------------

  # perf kwork -k softirq lat -n RCU

    Kwork Name                     | Cpu  | Avg delay     | Count     | Max delay     | Max delay start     | Max delay end       |
   --------------------------------------------------------------------------------------------------------------------------------
    (s)RCU:9                       | 0006 |      0.675 ms |         7 |      1.328 ms |      43997.670304 s |      43997.671632 s |
    (s)RCU:9                       | 0000 |      0.414 ms |       701 |      3.996 ms |      43997.661170 s |      43997.665167 s |
    (s)RCU:9                       | 0005 |      0.245 ms |        88 |      1.866 ms |      43997.683105 s |      43997.684971 s |
    (s)RCU:9                       | 0004 |      0.237 ms |        26 |      0.792 ms |      43997.683018 s |      43997.683810 s |
    (s)RCU:9                       | 0007 |      0.217 ms |       140 |      1.335 ms |      43997.671080 s |      43997.672415 s |
    (s)RCU:9                       | 0001 |      0.216 ms |      1619 |      3.659 ms |      43997.662069 s |      43997.665727 s |
    (s)RCU:9                       | 0002 |      0.141 ms |       932 |      1.662 ms |      44005.010206 s |      44005.011868 s |
    (s)RCU:9                       | 0003 |      0.129 ms |      2193 |      1.507 ms |      44006.010208 s |      44006.011715 s |
   --------------------------------------------------------------------------------------------------------------------------------

  # perf kwork -k softirq lat -s count,avg -n RCU

    Kwork Name                     | Cpu  | Avg delay     | Count     | Max delay     | Max delay start     | Max delay end       |
   --------------------------------------------------------------------------------------------------------------------------------
    (s)RCU:9                       | 0003 |      0.129 ms |      2193 |      1.507 ms |      44006.010208 s |      44006.011715 s |
    (s)RCU:9                       | 0001 |      0.216 ms |      1619 |      3.659 ms |      43997.662069 s |      43997.665727 s |
    (s)RCU:9                       | 0002 |      0.141 ms |       932 |      1.662 ms |      44005.010206 s |      44005.011868 s |
    (s)RCU:9                       | 0000 |      0.414 ms |       701 |      3.996 ms |      43997.661170 s |      43997.665167 s |
    (s)RCU:9                       | 0007 |      0.217 ms |       140 |      1.335 ms |      43997.671080 s |      43997.672415 s |
    (s)RCU:9                       | 0005 |      0.245 ms |        88 |      1.866 ms |      43997.683105 s |      43997.684971 s |
    (s)RCU:9                       | 0004 |      0.237 ms |        26 |      0.792 ms |      43997.683018 s |      43997.683810 s |
    (s)RCU:9                       | 0006 |      0.675 ms |         7 |      1.328 ms |      43997.670304 s |      43997.671632 s |
   --------------------------------------------------------------------------------------------------------------------------------

  # perf kwork -k softirq lat --time 43997,

    Kwork Name                     | Cpu  | Avg delay     | Count     | Max delay     | Max delay start     | Max delay end       |
   --------------------------------------------------------------------------------------------------------------------------------
    (s)TIMER:1                     | 0006 |      1.048 ms |         1 |      1.048 ms |      44000.829759 s |      44000.830807 s |
    (s)TIMER:1                     | 0001 |      1.008 ms |         4 |      3.434 ms |      43997.662069 s |      43997.665503 s |
    (s)RCU:9                       | 0006 |      0.675 ms |         7 |      1.328 ms |      43997.670304 s |      43997.671632 s |
    (s)RCU:9                       | 0000 |      0.414 ms |       701 |      3.996 ms |      43997.661170 s |      43997.665167 s |
    (s)TIMER:1                     | 0004 |      0.083 ms |        21 |      0.127 ms |      44004.969171 s |      44004.969298 s |
    ... <SNIP> ...
    (s)SCHED:7                     | 0005 |      0.050 ms |         4 |      0.086 ms |      43997.684852 s |      43997.684938 s |
    (s)SCHED:7                     | 0001 |      0.049 ms |       655 |      0.837 ms |      44005.707998 s |      44005.708835 s |
    (s)SCHED:7                     | 0007 |      0.044 ms |       171 |      0.077 ms |      43997.943265 s |      43997.943342 s |
    (s)SCHED:7                     | 0002 |      0.040 ms |      1731 |      0.211 ms |      44005.009237 s |      44005.009447 s |
   --------------------------------------------------------------------------------------------------------------------------------

Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220709015033.38326-12-yangjihong1@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2022-07-26 16:31:54 -03:00
Yang Jihong
ad3d9f7a92 perf kwork: Implement perf kwork latency 
Implements framework of perf kwork latency, which is used to report time
properties such as delay time and frequency.

Test cases:

  # perf kwork lat -h

   Usage: perf kwork latency [<options>]

      -C, --cpu <cpu>       list of cpus to profile
      -i, --input <file>    input file name
      -n, --name <name>     event name to profile
      -s, --sort <key[,key2...]>
                            sort by key(s): avg, max, count
          --time <str>      Time span for analysis (start,stop)

  # perf kwork lat -C 199
  Requested CPU 199 too large. Consider raising MAX_NR_CPUS
  Invalid cpu bitmap

  # perf kwork lat -i perf_no_exist.data
  failed to open perf_no_exist.data: No such file or directory

  # perf kwork lat -s avg1
    Error: Unknown --sort key: `avg1'

   Usage: perf kwork latency [<options>]

      -C, --cpu <cpu>       list of cpus to profile
      -i, --input <file>    input file name
      -n, --name <name>     event name to profile
      -s, --sort <key[,key2...]>
                            sort by key(s): avg, max, count
          --time <str>      Time span for analysis (start,stop)

  # perf kwork lat --time FFFF,
  Invalid time span

  # perf kwork lat

    Kwork Name                     | Cpu  | Avg delay     | Count    | Max delay     | Max delay start     | Max delay end       |
   --------------------------------------------------------------------------------------------------------------------------------
   --------------------------------------------------------------------------------------------------------------------------------
    INFO: 36.570% skipped events (31537 including 0 raise, 31537 entry, 0 exit)

Since there are no latency-enabled events, the output is empty.

Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220709015033.38326-11-yangjihong1@huawei.com
[ Add {} for multiline if blocks ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2022-07-26 16:31:54 -03:00
Yang Jihong
8dbc3c8689 perf kwork: Add workqueue report support 
Implements workqueue report function.

Test cases:

  # perf kwork -k workqueue rep

    Kwork Name                     | Cpu  | Total Runtime | Count     | Max runtime   | Max runtime start   | Max runtime end     |
   --------------------------------------------------------------------------------------------------------------------------------
    (w)gc_worker                   | 0001 |   1912.389 ms |       173 |     12.896 ms |      44002.050787 s |      44002.063683 s |
    (w)mix_interrupt_randomness    | 0000 |     24.308 ms |       285 |      3.349 ms |      44004.784908 s |      44004.788257 s |
    (w)e1000_watchdog              | 0002 |      5.332 ms |         5 |      2.059 ms |      44000.914366 s |      44000.916424 s |
    (w)vmstat_update               | 0005 |      0.989 ms |         2 |      0.953 ms |      43997.986991 s |      43997.987944 s |
    (w)vmstat_shepherd             | 0000 |      0.964 ms |         8 |      0.195 ms |      43997.986453 s |      43997.986648 s |
    (w)vmstat_update               | 0003 |      0.306 ms |         6 |      0.077 ms |      44004.689543 s |      44004.689620 s |
    (w)vmstat_update               | 0000 |      0.196 ms |         5 |      0.049 ms |      44005.713732 s |      44005.713781 s |
    (w)vmstat_update               | 0001 |      0.162 ms |         2 |      0.130 ms |      44000.192034 s |      44000.192164 s |
    (w)mix_interrupt_randomness    | 0002 |      0.114 ms |         5 |      0.037 ms |      44005.012625 s |      44005.012662 s |
    (w)vmstat_update               | 0002 |      0.084 ms |         2 |      0.043 ms |      44004.817702 s |      44004.817745 s |
    (w)vmstat_update               | 0006 |      0.067 ms |         2 |      0.041 ms |      43997.987214 s |      43997.987254 s |
    (w)neigh_periodic_work         | 0004 |      0.039 ms |         1 |      0.039 ms |      43999.929935 s |      43999.929974 s |
    (w)vmstat_update               | 0007 |      0.037 ms |         1 |      0.037 ms |      43997.988969 s |      43997.989006 s |
    (w)neigh_managed_work          | 0001 |      0.036 ms |         1 |      0.036 ms |      43997.665813 s |      43997.665849 s |
    (w)neigh_managed_work          | 0004 |      0.036 ms |         1 |      0.036 ms |      44002.953507 s |      44002.953543 s |
    (w)vmstat_update               | 0004 |      0.027 ms |         1 |      0.027 ms |      43997.913973 s |      43997.914000 s |
   --------------------------------------------------------------------------------------------------------------------------------

  # perf kwork -k workqueue rep -S

    Kwork Name                     | Cpu  | Total Runtime | Count     | Max runtime   | Max runtime start   | Max runtime end     |
   --------------------------------------------------------------------------------------------------------------------------------
    (w)gc_worker                   | 0001 |   1912.389 ms |       173 |     12.896 ms |      44002.050787 s |      44002.063683 s |
    (w)mix_interrupt_randomness    | 0000 |     24.308 ms |       285 |      3.349 ms |      44004.784908 s |      44004.788257 s |
    (w)e1000_watchdog              | 0002 |      5.332 ms |         5 |      2.059 ms |      44000.914366 s |      44000.916424 s |
    (w)vmstat_update               | 0005 |      0.989 ms |         2 |      0.953 ms |      43997.986991 s |      43997.987944 s |
    (w)vmstat_shepherd             | 0000 |      0.964 ms |         8 |      0.195 ms |      43997.986453 s |      43997.986648 s |
    (w)vmstat_update               | 0003 |      0.306 ms |         6 |      0.077 ms |      44004.689543 s |      44004.689620 s |
    (w)vmstat_update               | 0000 |      0.196 ms |         5 |      0.049 ms |      44005.713732 s |      44005.713781 s |
    (w)vmstat_update               | 0001 |      0.162 ms |         2 |      0.130 ms |      44000.192034 s |      44000.192164 s |
    (w)mix_interrupt_randomness    | 0002 |      0.114 ms |         5 |      0.037 ms |      44005.012625 s |      44005.012662 s |
    (w)vmstat_update               | 0002 |      0.084 ms |         2 |      0.043 ms |      44004.817702 s |      44004.817745 s |
    (w)vmstat_update               | 0006 |      0.067 ms |         2 |      0.041 ms |      43997.987214 s |      43997.987254 s |
    (w)neigh_periodic_work         | 0004 |      0.039 ms |         1 |      0.039 ms |      43999.929935 s |      43999.929974 s |
    (w)vmstat_update               | 0007 |      0.037 ms |         1 |      0.037 ms |      43997.988969 s |      43997.989006 s |
    (w)neigh_managed_work          | 0001 |      0.036 ms |         1 |      0.036 ms |      43997.665813 s |      43997.665849 s |
    (w)neigh_managed_work          | 0004 |      0.036 ms |         1 |      0.036 ms |      44002.953507 s |      44002.953543 s |
    (w)vmstat_update               | 0004 |      0.027 ms |         1 |      0.027 ms |      43997.913973 s |      43997.914000 s |
   --------------------------------------------------------------------------------------------------------------------------------
    Total count            :       500
    Total runtime   (msec) :  1945.085 (0.192% load average)
    Total time span (msec) : 10155.026
   --------------------------------------------------------------------------------------------------------------------------------

  # perf kwork -k workqueue rep -n vmstat_update

    Kwork Name                     | Cpu  | Total Runtime | Count     | Max runtime   | Max runtime start   | Max runtime end     |
   --------------------------------------------------------------------------------------------------------------------------------
    (w)vmstat_update               | 0005 |      0.989 ms |         2 |      0.953 ms |      43997.986991 s |      43997.987944 s |
    (w)vmstat_update               | 0003 |      0.306 ms |         6 |      0.077 ms |      44004.689543 s |      44004.689620 s |
    (w)vmstat_update               | 0000 |      0.196 ms |         5 |      0.049 ms |      44005.713732 s |      44005.713781 s |
    (w)vmstat_update               | 0001 |      0.162 ms |         2 |      0.130 ms |      44000.192034 s |      44000.192164 s |
    (w)vmstat_update               | 0002 |      0.084 ms |         2 |      0.043 ms |      44004.817702 s |      44004.817745 s |
    (w)vmstat_update               | 0006 |      0.067 ms |         2 |      0.041 ms |      43997.987214 s |      43997.987254 s |
    (w)vmstat_update               | 0007 |      0.037 ms |         1 |      0.037 ms |      43997.988969 s |      43997.989006 s |
    (w)vmstat_update               | 0004 |      0.027 ms |         1 |      0.027 ms |      43997.913973 s |      43997.914000 s |
   --------------------------------------------------------------------------------------------------------------------------------

Committer testing:

  # perf kwork -k workqueue rep -C 1 | head -20

    Kwork Name                     | Cpu  | Total Runtime | Count     | Max runtime   | Max runtime start   | Max runtime end     |
   --------------------------------------------------------------------------------------------------------------------------------
    (w)commit_work                 | 0001 |     25.896 ms |         2 |     13.200 ms |      26522.906700 s |      26522.919900 s |
    (w)commit_work                 | 0001 |     13.316 ms |         1 |     13.316 ms |      26522.573246 s |      26522.586562 s |
    (w)commit_work                 | 0001 |     13.177 ms |         1 |     13.177 ms |      26522.673406 s |      26522.686583 s |
    (w)commit_work                 | 0001 |     12.630 ms |         1 |     12.630 ms |      26522.123921 s |      26522.136551 s |
    (w)btrfs_work_helper           | 0001 |      3.544 ms |         1 |      3.544 ms |      26529.131296 s |      26529.134840 s |
    (w)btrfs_work_helper           | 0001 |      3.330 ms |         1 |      3.330 ms |      26529.137698 s |      26529.141028 s |
    (w)btrfs_work_helper           | 0001 |      2.855 ms |         1 |      2.855 ms |      26529.134842 s |      26529.137697 s |
    (w)btrfs_work_helper           | 0001 |      2.757 ms |         1 |      2.757 ms |      26529.124086 s |      26529.126843 s |
    (w)btrfs_work_helper           | 0001 |      2.182 ms |         1 |      2.182 ms |      26529.141030 s |      26529.143212 s |
    (w)btrfs_work_helper           | 0001 |      1.743 ms |         1 |      1.743 ms |      26520.415335 s |      26520.417078 s |
    (w)btrfs_work_helper           | 0001 |      1.499 ms |         1 |      1.499 ms |      26529.127774 s |      26529.129272 s |
    (w)btrfs_work_helper           | 0001 |      1.446 ms |         1 |      1.446 ms |      26529.129848 s |      26529.131294 s |
    (w)btrfs_work_helper           | 0001 |      1.373 ms |         1 |      1.373 ms |      26523.808270 s |      26523.809643 s |
    (w)wb_workfn                   | 0001 |      1.165 ms |         2 |      0.763 ms |      26527.071056 s |      26527.071819 s |
    (w)btrfs_work_helper           | 0001 |      0.926 ms |         1 |      0.926 ms |      26529.126846 s |      26529.127771 s |
    (w)btrfs_work_helper           | 0001 |      0.571 ms |         1 |      0.571 ms |      26529.129275 s |      26529.129846 s |
    (w)wb_workfn                   | 0001 |      0.525 ms |         1 |      0.525 ms |      26522.975151 s |      26522.975676 s |
  #

Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220709015033.38326-10-yangjihong1@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2022-07-26 16:31:54 -03:00
Yang Jihong
4c14819169 perf kwork: Add softirq report support 
Implements softirq kwork report function.

Test cases:

  # perf kwork -k softirq rep

    Kwork Name                     | Cpu  | Total Runtime | Count     | Max runtime   | Max runtime start   | Max runtime end     |
   --------------------------------------------------------------------------------------------------------------------------------
    (s)TIMER:1                     | 0003 |    181.387 ms |      2476 |      1.240 ms |      44004.787960 s |      44004.789201 s |
    (s)RCU:9                       | 0003 |     91.573 ms |      2193 |      0.650 ms |      44004.790258 s |      44004.790908 s |
    (s)RCU:9                       | 0001 |     78.960 ms |      1619 |      1.195 ms |      44001.496553 s |      44001.497749 s |
    (s)SCHED:7                     | 0003 |     55.962 ms |      1255 |      0.954 ms |      44004.812008 s |      44004.812962 s |
    ... <SNIP> ...
    (s)RCU:9                       | 0004 |      0.830 ms |        26 |      0.058 ms |      43997.666418 s |      43997.666476 s |
    (s)TIMER:1                     | 0001 |      0.471 ms |         4 |      0.158 ms |      44007.834694 s |      44007.834852 s |
    (s)RCU:9                       | 0006 |      0.220 ms |         7 |      0.048 ms |      44004.833764 s |      44004.833812 s |
    (s)NET_RX:3                    | 0002 |      0.164 ms |         5 |      0.049 ms |      44005.012418 s |      44005.012466 s |
    (s)TIMER:1                     | 0005 |      0.164 ms |         1 |      0.164 ms |      44007.820474 s |      44007.820638 s |
    (s)TIMER:1                     | 0006 |      0.087 ms |         1 |      0.087 ms |      44000.830807 s |      44000.830894 s |
    (s)SCHED:7                     | 0006 |      0.080 ms |         2 |      0.044 ms |      43997.826145 s |      43997.826189 s |
   --------------------------------------------------------------------------------------------------------------------------------

  #
  # perf kwork -k softirq rep -S

    Kwork Name                     | Cpu  | Total Runtime | Count     | Max runtime   | Max runtime start   | Max runtime end     |
   --------------------------------------------------------------------------------------------------------------------------------
    (s)TIMER:1                     | 0003 |    181.387 ms |      2476 |      1.240 ms |      44004.787960 s |      44004.789201 s |
    (s)RCU:9                       | 0003 |     91.573 ms |      2193 |      0.650 ms |      44004.790258 s |      44004.790908 s |
    (s)RCU:9                       | 0001 |     78.960 ms |      1619 |      1.195 ms |      44001.496553 s |      44001.497749 s |
    (s)SCHED:7                     | 0000 |     63.631 ms |       680 |      2.690 ms |      44006.721976 s |      44006.724666 s |
    ... <SNIP> ...
    (s)SCHED:7                     | 0003 |     55.962 ms |      1255 |      0.954 ms |      44004.812008 s |      44004.812962 s |
    (s)RCU:9                       | 0006 |      0.220 ms |         7 |      0.048 ms |      44004.833764 s |      44004.833812 s |
    (s)NET_RX:3                    | 0002 |      0.164 ms |         5 |      0.049 ms |      44005.012418 s |      44005.012466 s |
    (s)TIMER:1                     | 0005 |      0.164 ms |         1 |      0.164 ms |      44007.820474 s |      44007.820638 s |
    (s)TIMER:1                     | 0006 |      0.087 ms |         1 |      0.087 ms |      44000.830807 s |      44000.830894 s |
    (s)SCHED:7                     | 0006 |      0.080 ms |         2 |      0.044 ms |      43997.826145 s |      43997.826189 s |
   --------------------------------------------------------------------------------------------------------------------------------
    Total count            :     12748
    Total runtime   (msec) :   661.433 (0.065% load average)
    Total time span (msec) : 10176.441
   --------------------------------------------------------------------------------------------------------------------------------

  #
  # perf kwork -k softirq rep -s count,max

    Kwork Name                     | Cpu  | Total Runtime | Count     | Max runtime   | Max runtime start   | Max runtime end     |
   --------------------------------------------------------------------------------------------------------------------------------
    (s)TIMER:1                     | 0003 |    181.387 ms |      2476 |      1.240 ms |      44004.787960 s |      44004.789201 s |
    (s)RCU:9                       | 0003 |     91.573 ms |      2193 |      0.650 ms |      44004.790258 s |      44004.790908 s |
    (s)SCHED:7                     | 0002 |     50.039 ms |      1731 |      0.074 ms |      44005.009447 s |      44005.009521 s |
    (s)RCU:9                       | 0001 |     78.960 ms |      1619 |      1.195 ms |      44001.496553 s |      44001.497749 s |
    (s)SCHED:7                     | 0003 |     55.962 ms |      1255 |      0.954 ms |      44004.812008 s |      44004.812962 s |
    ... <SNIP> ...
    (s)RCU:9                       | 0002 |     35.241 ms |       932 |      0.407 ms |      44005.009541 s |      44005.009949 s |
    (s)RCU:9                       | 0000 |     45.710 ms |       702 |      1.144 ms |      44004.787023 s |      44004.788167 s |
    (s)SCHED:7                     | 0006 |      0.080 ms |         2 |      0.044 ms |      43997.826145 s |      43997.826189 s |
    (s)TIMER:1                     | 0005 |      0.164 ms |         1 |      0.164 ms |      44007.820474 s |      44007.820638 s |
    (s)TIMER:1                     | 0006 |      0.087 ms |         1 |      0.087 ms |      44000.830807 s |      44000.830894 s |
   --------------------------------------------------------------------------------------------------------------------------------

Committer testing:

  # perf kwork -k softirq report -C 2 -s count,max

  Kwork Name                     | Cpu  | Total Runtime | Count     | Max runtime   | Max runtime start   | Max runtime end     |
 --------------------------------------------------------------------------------------------------------------------------------
  (s)SCHED:7                     | 0002 |      0.980 ms |       159 |      0.024 ms |      26035.571037 s |      26035.571061 s |
  (s)RCU:9                       | 0002 |      0.124 ms |        88 |      0.021 ms |      26035.177050 s |      26035.177071 s |
  (s)TIMER:1                     | 0002 |      0.122 ms |        56 |      0.007 ms |      26035.468045 s |      26035.468052 s |
 --------------------------------------------------------------------------------------------------------------------------------

  #

Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220709015033.38326-9-yangjihong1@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2022-07-26 16:31:54 -03:00
Yang Jihong
94348520c6 perf kwork: Add irq report support 
Implements irq kwork report function.

Test cases:

  # perf kwork record -- sleep 10
  [ perf record: Woken up 0 times to write data ]
  [ perf record: Captured and wrote 6.134 MB perf.data ]

  # perf kwork report

    Kwork Name                     | Cpu  | Total Runtime | Count     | Max runtime   | Max runtime start   | Max runtime end     |
   --------------------------------------------------------------------------------------------------------------------------------
    virtio0-requests:25            | 0000 |   1167.501 ms |     18284 |      1.096 ms |      44004.464905 s |      44004.466001 s |
    eth0:10                        | 0002 |      0.185 ms |         5 |      0.058 ms |      44005.012222 s |      44005.012280 s |
   --------------------------------------------------------------------------------------------------------------------------------

  # perf kwork report -C 2

    Kwork Name                     | Cpu  | Total Runtime | Count     | Max runtime   | Max runtime start   | Max runtime end     |
   --------------------------------------------------------------------------------------------------------------------------------
    eth0:10                        | 0002 |      0.185 ms |         5 |      0.058 ms |      44005.012222 s |      44005.012280 s |
   --------------------------------------------------------------------------------------------------------------------------------

  # perf kwork report -C 3

    Kwork Name                     | Cpu  | Total Runtime | Count     | Max runtime   | Max runtime start   | Max runtime end     |
   --------------------------------------------------------------------------------------------------------------------------------
   --------------------------------------------------------------------------------------------------------------------------------

  # perf kwork report -i perf.data

    Kwork Name                     | Cpu  | Total Runtime | Count     | Max runtime   | Max runtime start   | Max runtime end     |
   --------------------------------------------------------------------------------------------------------------------------------
    virtio0-requests:25            | 0000 |   1167.501 ms |     18284 |      1.096 ms |      44004.464905 s |      44004.466001 s |
    eth0:10                        | 0002 |      0.185 ms |         5 |      0.058 ms |      44005.012222 s |      44005.012280 s |
   --------------------------------------------------------------------------------------------------------------------------------

  # perf kwork report -s max,freq

    Kwork Name                     | Cpu  | Total Runtime | Count     | Max runtime   | Max runtime start   | Max runtime end     |
   --------------------------------------------------------------------------------------------------------------------------------
    virtio0-requests:25            | 0000 |   1167.501 ms |     18284 |      1.096 ms |      44004.464905 s |      44004.466001 s |
    eth0:10                        | 0002 |      0.185 ms |         5 |      0.058 ms |      44005.012222 s |      44005.012280 s |
   --------------------------------------------------------------------------------------------------------------------------------

  # perf kwork report -S

    Kwork Name                     | Cpu  | Total Runtime | Count     | Max runtime   | Max runtime start   | Max runtime end     |
   --------------------------------------------------------------------------------------------------------------------------------
    virtio0-requests:25            | 0000 |   1167.501 ms |     18284 |      1.096 ms |      44004.464905 s |      44004.466001 s |
    eth0:10                        | 0002 |      0.185 ms |         5 |      0.058 ms |      44005.012222 s |      44005.012280 s |
   --------------------------------------------------------------------------------------------------------------------------------
    Total count            :     18289
    Total runtime   (msec) :  1167.686 (0.115% load average)
    Total time span (msec) : 10159.155
   --------------------------------------------------------------------------------------------------------------------------------

  # perf kwork report --time 44005,

    Kwork Name                     | Cpu  | Total Runtime | Count     | Max runtime   | Max runtime start   | Max runtime end     |
   --------------------------------------------------------------------------------------------------------------------------------
    virtio0-requests:25            | 0000 |    402.173 ms |      4695 |      0.981 ms |      44007.831992 s |      44007.832973 s |
    eth0:10                        | 0002 |      0.089 ms |         2 |      0.058 ms |      44005.012222 s |      44005.012280 s |
   --------------------------------------------------------------------------------------------------------------------------------

Committer testing:

  # perf kwork report

    Kwork Name                     | Cpu  | Total Runtime | Count     | Max runtime   | Max runtime start   | Max runtime end     |
   --------------------------------------------------------------------------------------------------------------------------------
    nvme0q5:130                    | 0004 |      1.101 ms |        49 |      0.051 ms |      26035.056403 s |      26035.056455 s |
    amdgpu:162                     | 0002 |      0.176 ms |         9 |      0.046 ms |      26035.268020 s |      26035.268066 s |
    nvme0q24:149                   | 0023 |      0.161 ms |        55 |      0.009 ms |      26035.655280 s |      26035.655288 s |
    nvme0q20:145                   | 0019 |      0.090 ms |        33 |      0.014 ms |      26035.939018 s |      26035.939032 s |
    nvme0q31:156                   | 0030 |      0.075 ms |        21 |      0.010 ms |      26035.052237 s |      26035.052247 s |
    nvme0q8:133                    | 0007 |      0.062 ms |        12 |      0.021 ms |      26035.416840 s |      26035.416861 s |
    nvme0q6:131                    | 0005 |      0.054 ms |        22 |      0.010 ms |      26035.199919 s |      26035.199929 s |
    nvme0q19:144                   | 0018 |      0.052 ms |        14 |      0.010 ms |      26035.110615 s |      26035.110625 s |
    nvme0q7:132                    | 0006 |      0.049 ms |        13 |      0.007 ms |      26035.125180 s |      26035.125187 s |
    nvme0q18:143                   | 0017 |      0.033 ms |        14 |      0.007 ms |      26035.169698 s |      26035.169705 s |
    nvme0q17:142                   | 0016 |      0.013 ms |         1 |      0.013 ms |      26035.565147 s |      26035.565160 s |
    enp5s0-rx-0:164                | 0006 |      0.004 ms |         4 |      0.002 ms |      26035.928882 s |      26035.928884 s |
    enp5s0-tx-0:166                | 0008 |      0.003 ms |         3 |      0.002 ms |      26035.870923 s |      26035.870925 s |
   --------------------------------------------------------------------------------------------------------------------------------

  #

Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220709015033.38326-8-yangjihong1@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2022-07-26 16:31:54 -03:00
Yang Jihong
f98919ec4f perf kwork: Implement 'report' subcommand 
Implements framework of 'perf kwork report', which is used to report
time properties such as run time and frequency:

Test cases:

  # perf kwork

   Usage: perf kwork [<options>] {record|report}

      -D, --dump-raw-trace  dump raw trace in ASCII
      -f, --force           don't complain, do it
      -k, --kwork <kwork>   list of kwork to profile (irq, softirq, workqueue, etc)
      -v, --verbose         be more verbose (show symbol address, etc)

  # perf kwork report -h

   Usage: perf kwork report [<options>]

      -C, --cpu <cpu>       list of cpus to profile
      -i, --input <file>    input file name
      -n, --name <name>     event name to profile
      -s, --sort <key[,key2...]>
                            sort by key(s): runtime, max, count
      -S, --with-summary    Show summary with statistics
          --time <str>      Time span for analysis (start,stop)

  # perf kwork report

    Kwork Name                     | Cpu  | Total Runtime | Count     | Max runtime   | Max runtime start   | Max runtime end     |
   --------------------------------------------------------------------------------------------------------------------------------
   --------------------------------------------------------------------------------------------------------------------------------

  # perf kwork report -S

    Kwork Name                     | Cpu  | Total Runtime | Count     | Max runtime   | Max runtime start   | Max runtime end     |
   --------------------------------------------------------------------------------------------------------------------------------
   --------------------------------------------------------------------------------------------------------------------------------
    Total count            :         0
    Total runtime   (msec) :     0.000 (0.000% load average)
    Total time span (msec) :     0.000
   --------------------------------------------------------------------------------------------------------------------------------

  # perf kwork report -C 0,100
  Requested CPU 100 too large. Consider raising MAX_NR_CPUS
  Invalid cpu bitmap

  # perf kwork report -s runtime1
    Error: Unknown --sort key: `runtime1'

   Usage: perf kwork report [<options>]

      -C, --cpu <cpu>       list of cpus to profile
      -i, --input <file>    input file name
      -n, --name <name>     event name to profile
      -s, --sort <key[,key2...]>
                            sort by key(s): runtime, max, count
      -S, --with-summary    Show summary with statistics
          --time <str>      Time span for analysis (start,stop)

  # perf kwork report -i perf_no_exist.data
  failed to open perf_no_exist.data: No such file or directory

  # perf kwork report --time 00FFF,
  Invalid time span

Since there are no report supported events, the output is empty.

Briefly describe the data structure:

1. "class" indicates event type. For example, irq and softiq correspond
to different types.

2. "cluster" refers to a specific event corresponding to a type. For
example, RCU and TIMER in softirq correspond to different clusters,
which contains three types of events: raise, entry, and exit.

3. "atom" includes time of each sample and sample of the previous phase.
(For example, exit corresponds to entry, which is used for timehist.)

Committer notes:

- Add {} for multiline if blocks.

- report_print_work() should either return that ret variable that
  accounts how many bytes were printed or stop accounting and be void.
  Do the former for now to avoid this:

builtin-kwork.c:534:6: error: variable 'ret' set but not used [-Werror,-Wunused-but-set-variable]
        int ret = 0;
            ^
1 error generated.

  When building with:

  ⬢[acme@toolbox perf]$ clang --version
  clang version 13.0.0 (https://github.com/llvm/llvm-project e8991caea8690ec2d17b0b7e1c29bf0da6609076)

Also:

  -       if ((dst_type >= 0) && (dst_type < KWORK_TRACE_MAX)) {
  +       if (dst_type < KWORK_TRACE_MAX) {

Several versions of clang and at least this gcc:

   3    51.40 alpine:3.9                    : FAIL gcc version 8.3.0 (Alpine 8.3.0)
    builtin-kwork.c:411:16: error: comparison of unsigned enum expression >= 0 is
          always true [-Werror,-Wtautological-compare]
            if ((dst_type >= 0) && (dst_type < KWORK_TRACE_MAX)) {

As the first entry in a enum is zero.

Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220709015033.38326-7-yangjihong1@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2022-07-26 16:30:05 -03:00
Yang Jihong
97179d9d08 perf kwork: Add workqueue kwork record support 
Record workqueue events workqueue:workqueue_activate_work,
workqueue:workqueue_execute_start & workqueue:workqueue_execute_end

Tese cases:
Record all events:

  # perf kwork record -o perf_kwork.date -- sleep 1
  [ perf record: Woken up 0 times to write data ]
  [ perf record: Captured and wrote 0.857 MB perf_kwork.date ]
  #
  # perf evlist -i perf_kwork.date
  irq:irq_handler_entry
  irq:irq_handler_exit
  irq:softirq_raise
  irq:softirq_entry
  irq:softirq_exit
  workqueue:workqueue_activate_work
  workqueue:workqueue_execute_start
  workqueue:workqueue_execute_end
  dummy:HG
  # Tip: use 'perf evlist --trace-fields' to show fields for tracepoint events

Record workqueue events:

  # perf kwork -k workqueue record -o perf_kwork.date -- sleep 1
  [ perf record: Woken up 1 times to write data ]
  [ perf record: Captured and wrote 0.081 MB perf_kwork.date ]
  #
  # perf evlist -i perf_kwork.date
  workqueue:workqueue_activate_work
  workqueue:workqueue_execute_start
  workqueue:workqueue_execute_end
  dummy:HG
  # Tip: use 'perf evlist --trace-fields' to show fields for tracepoint events

Committer testing:

  # perf kwork record sleep 1
  [ perf record: Woken up 1 times to write data ]
  [ perf record: Captured and wrote 3.430 MB perf.data (24130 samples) ]
  # perf evlist -v
  irq:irq_handler_entry: type: 2, size: 128, config: 0x97, { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|CPU|PERIOD|RAW|IDENTIFIER, read_format: ID, disabled: 1, inherit: 1, sample_id_all: 1, exclude_guest: 1
  irq:irq_handler_exit: type: 2, size: 128, config: 0x96, { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|CPU|PERIOD|RAW|IDENTIFIER, read_format: ID, disabled: 1, inherit: 1, sample_id_all: 1, exclude_guest: 1
  irq:softirq_raise: type: 2, size: 128, config: 0x93, { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|CPU|PERIOD|RAW|IDENTIFIER, read_format: ID, disabled: 1, inherit: 1, sample_id_all: 1, exclude_guest: 1
  irq:softirq_entry: type: 2, size: 128, config: 0x95, { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|CPU|PERIOD|RAW|IDENTIFIER, read_format: ID, disabled: 1, inherit: 1, sample_id_all: 1, exclude_guest: 1
  irq:softirq_exit: type: 2, size: 128, config: 0x94, { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|CPU|PERIOD|RAW|IDENTIFIER, read_format: ID, disabled: 1, inherit: 1, sample_id_all: 1, exclude_guest: 1
  workqueue:workqueue_activate_work: type: 2, size: 128, config: 0x106, { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|CPU|PERIOD|RAW|IDENTIFIER, read_format: ID, disabled: 1, inherit: 1, sample_id_all: 1, exclude_guest: 1
  workqueue:workqueue_execute_start: type: 2, size: 128, config: 0x105, { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|CPU|PERIOD|RAW|IDENTIFIER, read_format: ID, disabled: 1, inherit: 1, sample_id_all: 1, exclude_guest: 1
  workqueue:workqueue_execute_end: type: 2, size: 128, config: 0x104, { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|CPU|PERIOD|RAW|IDENTIFIER, read_format: ID, disabled: 1, inherit: 1, sample_id_all: 1, exclude_guest: 1
  dummy:HG: type: 1, size: 128, config: 0x9, { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|CPU|RAW|IDENTIFIER, read_format: ID, inherit: 1, mmap: 1, comm: 1, task: 1, sample_id_all: 1, mmap2: 1, comm_exec: 1, ksymbol: 1, bpf_event: 1
  # Tip: use 'perf evlist --trace-fields' to show fields for tracepoint events
  # perf script | grep workqueue | head
           swapper     0 [018] 26035.043289: workqueue:workqueue_activate_work: work struct 0xffff8b8ffeeae368
   kworker/18:2-ev 70440 [018] 26035.043293: workqueue:workqueue_execute_start: work struct 0xffff8b8ffeeae368: function free_work
   kworker/18:2-ev 70440 [018] 26035.043301:   workqueue:workqueue_execute_end: work struct 0xffff8b8ffeeae368: function free_work
           swapper     0 [021] 26035.044704: workqueue:workqueue_activate_work: work struct 0xffff8b8ffef6e368
   kworker/21:0-ev 4080535 [021] 26035.044709: workqueue:workqueue_execute_start: work struct 0xffff8b8ffef6e368: function free_work
   kworker/21:0-ev 4080535 [021] 26035.044716:   workqueue:workqueue_execute_end: work struct 0xffff8b8ffef6e368: function free_work
           swapper     0 [018] 26035.045230: workqueue:workqueue_activate_work: work struct 0xffff8b8ffeeae368
   kworker/18:2-ev 70440 [018] 26035.045232: workqueue:workqueue_execute_start: work struct 0xffff8b8ffeeae368: function free_work
   kworker/18:2-ev 70440 [018] 26035.045235:   workqueue:workqueue_execute_end: work struct 0xffff8b8ffeeae368: function free_work
           swapper     0 [001] 26035.052046: workqueue:workqueue_activate_work: work struct 0xffff8b8108901590
  #

Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220709015033.38326-5-yangjihong1@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2022-07-26 16:02:04 -03:00
Yang Jihong
e643932190 perf kwork: Add softirq kwork record support 
Record softirq events irq:softirq_raise, irq:softirq_entry &
irq:softirq_exit.

Test cases:
Record all events:

  # perf kwork record -o perf_kwork.date -- sleep 1
  [ perf record: Woken up 0 times to write data ]
  [ perf record: Captured and wrote 0.897 MB perf_kwork.date ]
  #
  # perf evlist -i perf_kwork.date
  irq:irq_handler_entry
  irq:irq_handler_exit
  irq:softirq_raise
  irq:softirq_entry
  irq:softirq_exit
  dummy:HG
  # Tip: use 'perf evlist --trace-fields' to show fields for tracepoint events

Record softirq events:

  # perf kwork -k softirq record -o perf_kwork.date -- sleep 1
  [ perf record: Woken up 1 times to write data ]
  [ perf record: Captured and wrote 0.141 MB perf_kwork.date ]
  #
  # perf evlist -i perf_kwork.date
  irq:softirq_raise
  irq:softirq_entry
  irq:softirq_exit
  dummy:HG
  # Tip: use 'perf evlist --trace-fields' to show fields for tracepoint events

Committer testing:

  # perf kwork record sleep 1
  [ perf record: Woken up 1 times to write data ]
  [ perf record: Captured and wrote 3.078 MB perf.data (17433 samples) ]
  # perf evlist -v
  irq:irq_handler_entry: type: 2, size: 128, config: 0x97, { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|CPU|PERIOD|RAW|IDENTIFIER, read_format: ID, disabled: 1, inherit: 1, sample_id_all: 1, exclude_guest: 1
  irq:irq_handler_exit: type: 2, size: 128, config: 0x96, { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|CPU|PERIOD|RAW|IDENTIFIER, read_format: ID, disabled: 1, inherit: 1, sample_id_all: 1, exclude_guest: 1
  irq:softirq_raise: type: 2, size: 128, config: 0x93, { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|CPU|PERIOD|RAW|IDENTIFIER, read_format: ID, disabled: 1, inherit: 1, sample_id_all: 1, exclude_guest: 1
  irq:softirq_entry: type: 2, size: 128, config: 0x95, { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|CPU|PERIOD|RAW|IDENTIFIER, read_format: ID, disabled: 1, inherit: 1, sample_id_all: 1, exclude_guest: 1
  irq:softirq_exit: type: 2, size: 128, config: 0x94, { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|CPU|PERIOD|RAW|IDENTIFIER, read_format: ID, disabled: 1, inherit: 1, sample_id_all: 1, exclude_guest: 1
  dummy:HG: type: 1, size: 128, config: 0x9, { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|CPU|RAW|IDENTIFIER, read_format: ID, inherit: 1, mmap: 1, comm: 1, task: 1, sample_id_all: 1, mmap2: 1, comm_exec: 1, ksymbol: 1, bpf_event: 1
  # Tip: use 'perf evlist --trace-fields' to show fields for tracepoint events
  # perf script | head
      migration/12    73 [012] 25884.940992:     irq:softirq_raise: vec=9 [action=RCU]
      migration/12    73 [012] 25884.940994:     irq:softirq_entry: vec=9 [action=RCU]
      migration/12    73 [012] 25884.940995:      irq:softirq_exit: vec=9 [action=RCU]
           swapper     0 [004] 25884.940995:     irq:softirq_raise: vec=9 [action=RCU]
           swapper     0 [004] 25884.940998:     irq:softirq_entry: vec=9 [action=RCU]
           swapper     0 [004] 25884.940999:      irq:softirq_exit: vec=9 [action=RCU]
               cc1 71212 [021] 25884.941990:     irq:softirq_raise: vec=9 [action=RCU]
           swapper     0 [004] 25884.941991:     irq:softirq_raise: vec=9 [action=RCU]
               cc1 71212 [021] 25884.941992:     irq:softirq_raise: vec=7 [action=SCHED]
         perf-exec 71208 [013] 25884.941992:     irq:softirq_raise: vec=9 [action=RCU]
  #

Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220709015033.38326-4-yangjihong1@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2022-07-26 16:01:54 -03:00
Yang Jihong
4f8ae962f0 perf kwork: Add irq kwork record support 
Record interrupt events irq:irq_handler_entry & irq_handler_exit

Test cases:

 # perf kwork record -o perf_kwork.date -- sleep 1
  [ perf record: Woken up 0 times to write data ]
  [ perf record: Captured and wrote 0.556 MB perf_kwork.date ]
  #
  # perf evlist -i perf_kwork.date
  irq:irq_handler_entry
  irq:irq_handler_exit
  dummy:HG
  # Tip: use 'perf evlist --trace-fields' to show fields for tracepoint events
  #

Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220709015033.38326-3-yangjihong1@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2022-07-26 16:01:29 -03:00
Yang Jihong
0f70d8e9db perf kwork: New tool to trace time properties of kernel work (such as softirq, and workqueue) 
The 'perf kwork' tool is used to trace time properties of kernel work
(such as irq, softirq, and workqueue), including runtime, latency, and
timehist, using the infrastructure in the perf tools to allow tracing
extra targets.

This is the first commit to reuse the 'perf record' framework code to
implement a simple record function, kwork is not supported currently.

Test cases:

  # perf

   usage: perf [--version] [--help] [OPTIONS] COMMAND [ARGS]

   The most commonly used perf commands are:
  <SNIP>
     iostat          Show I/O performance metrics
     kallsyms        Searches running kernel for symbols
     kmem            Tool to trace/measure kernel memory properties
     kvm             Tool to trace/measure kvm guest os
     kwork           Tool to trace/measure kernel work properties (latencies)
     list            List all symbolic event types
     lock            Analyze lock events
     mem             Profile memory accesses
     record          Run a command and record its profile into perf.data
  <SNIP>
   See 'perf help COMMAND' for more information on a specific command.

  # perf kwork

   Usage: perf kwork [<options>] {record}

      -D, --dump-raw-trace  dump raw trace in ASCII
      -f, --force           don't complain, do it
      -k, --kwork <kwork>   list of kwork to profile
      -v, --verbose         be more verbose (show symbol address, etc)

  # perf kwork record -- sleep 1
  [ perf record: Woken up 0 times to write data ]
  [ perf record: Captured and wrote 1.787 MB perf.data ]

Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220709015033.38326-2-yangjihong1@huawei.com
[ Add {} for multiline if blocks ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2022-07-26 16:01:24 -03:00