mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-26 20:38:12 +00:00
7b58b82b86
New features:
perf ftrace:
- Add -n/--use-nsec option to the 'latency' subcommand.
Default: usecs:
$ sudo perf ftrace latency -T dput -a sleep 1
# DURATION | COUNT | GRAPH |
0 - 1 us | 2098375 | ############################# |
1 - 2 us | 61 | |
2 - 4 us | 33 | |
4 - 8 us | 13 | |
8 - 16 us | 124 | |
16 - 32 us | 123 | |
32 - 64 us | 1 | |
64 - 128 us | 0 | |
128 - 256 us | 1 | |
256 - 512 us | 0 | |
Better granularity with nsec:
$ sudo perf ftrace latency -T dput -a -n sleep 1
# DURATION | COUNT | GRAPH |
0 - 1 us | 0 | |
1 - 2 ns | 0 | |
2 - 4 ns | 0 | |
4 - 8 ns | 0 | |
8 - 16 ns | 0 | |
16 - 32 ns | 0 | |
32 - 64 ns | 0 | |
64 - 128 ns | 1163434 | ############## |
128 - 256 ns | 914102 | ############# |
256 - 512 ns | 884 | |
512 - 1024 ns | 613 | |
1 - 2 us | 31 | |
2 - 4 us | 17 | |
4 - 8 us | 7 | |
8 - 16 us | 123 | |
16 - 32 us | 83 | |
perf lock:
- Add -c/--combine-locks option to merge lock instances in the same class into
a single entry.
# perf lock report -c
Name acquired contended avg wait(ns) total wait(ns) max wait(ns) min wait(ns)
rcu_read_lock 251225 0 0 0 0 0
hrtimer_bases.lock 39450 0 0 0 0 0
&sb->s_type->i_l... 10301 1 662 662 662 662
ptlock_ptr(page) 10173 2 701 1402 760 642
&(ei->i_block_re... 8732 0 0 0 0 0
&xa->xa_lock 8088 0 0 0 0 0
&base->lock 6705 0 0 0 0 0
&p->pi_lock 5549 0 0 0 0 0
&dentry->d_lockr... 5010 4 1274 5097 1844 789
&ep->lock 3958 0 0 0 0 0
- Add -F/--field option to customize the list of fields to output:
$ perf lock report -F contended,wait_max -k avg_wait
Name contended max wait(ns) avg wait(ns)
slock-AF_INET6 1 23543 23543
&lruvec->lru_lock 5 18317 11254
slock-AF_INET6 1 10379 10379
rcu_node_1 1 2104 2104
&dentry->d_lockr... 1 1844 1844
&dentry->d_lockr... 1 1672 1672
&newf->file_lock 15 2279 1025
&dentry->d_lockr... 1 792 792
- Add --synth=no option for record, as there is no need to symbolize,
lock names comes from the tracepoints.
perf record:
- Threaded recording, opt-in, via the new --threads command line option.
- Improve AMD IBS (Instruction-Based Sampling) error handling messages.
perf script:
- Add 'brstackinsnlen' field (use it with -F) for branch stacks.
- Output branch sample type in 'perf script'.
perf report:
- Add "addr_from" and "addr_to" sort dimensions.
- Print branch stack entry type in 'perf report --dump-raw-trace'
- Fix symbolization for chrooted workloads.
Hardware tracing:
Intel PT:
- Add CFE (Control Flow Event) and EVD (Event Data) packets support.
- Add MODE.Exec IFLAG bit support.
Explanation about these features from the "Intel® 64 and IA-32 architectures
software developer’s manual combined volumes: 1, 2A, 2B, 2C, 2D, 3A, 3B, 3C,
3D, and 4" PDF at:
https://cdrdv2.intel.com/v1/dl/getContent/671200
At page 3951:
<quote>
32.2.4
Event Trace is a capability that exposes details about the asynchronous
events, when they are generated, and when their corresponding software
event handler completes execution. These include:
o Interrupts, including NMI and SMI, including the interrupt vector when
defined.
o Faults, exceptions including the fault vector.
— Page faults additionally include the page fault address, when in context.
o Event handler returns, including IRET and RSM.
o VM exits and VM entries.¹
— VM exits include the values written to the “exit reason” and “exit qualification” VMCS fields.
INIT and SIPI events.
o TSX aborts, including the abort status returned for the RTM instructions.
o Shutdown.
Additionally, it provides indication of the status of the Interrupt Flag
(IF), to indicate when interrupts are masked.
</quote>
ARM CoreSight:
- Use advertised caps/min_interval as default sample_period on ARM spe.
- Update deduction of TRCCONFIGR register for branch broadcast on ARM's CoreSight ETM.
Vendor Events (JSON):
Intel:
- Update events and metrics for:
Alderlake, Broadwell, Broadwell DE, BroadwellX, CascadelakeX, Elkhartlake,
Bonnell, Goldmont, GoldmontPlus, Westmere EP-DP, Haswell, HaswellX,
Icelake, IcelakeX, Ivybridge, Ivytown, Jaketown, Knights Landing,
Nehalem EP, Sandybridge, Silvermont, Skylake, Skylake Server, SkylakeX,
Tigerlake, TremontX, Westmere EP-SP, Westmere EX.
ARM:
- Add support for HiSilicon CPA PMU aliasing.
perf stat:
- Fix forked applications enablement of counters.
- The 'slots' should only be printed on a different order than the one specified
on the command line when 'topdown' events are present, fix it.
Miscellaneous:
- Sync msr-index, cpufeatures header files with the kernel sources.
- Stop using some deprecated libbpf APIs in 'perf trace'.
- Fix some spelling mistakes.
- Refactor the maps pointers usage to pave the way for using refcount debugging.
- Only offer the --tui option on perf top, report and annotate when perf was
built with libslang.
- Don't mention --to-ctf in 'perf data --help' when not linking with the required
library, libbabeltrace.
- Use ARRAY_SIZE() instead of ad hoc equivalent, spotted by array_size.cocci.
- Enhance the matching of sub-commands abbreviations:
'perf c2c rec' -> 'perf c2c record'
'perf c2c recport -> error
- Set build-id using build-id header on new mmap records.
- Fix generation of 'perf --version' string.
perf test:
- Add test for the arm_spe event.
- Add test to check unwinding using fame-pointer (fp) mode on arm64.
- Make metric testing more robust in 'perf test'.
- Add error message for unsupported branch stack cases.
libperf:
- Add API for allocating new thread map array.
- Fix typo in perf_evlist__open() failure error messages in libperf tests.
perf c2c:
- Replace bitmap_weight() with bitmap_empty() where appropriate.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Merge tag 'perf-tools-for-v5.18-2022-03-26' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux
Pull perf tools updates from Arnaldo Carvalho de Melo:
"New features:
perf ftrace:
- Add -n/--use-nsec option to the 'latency' subcommand.
Default: usecs:
$ sudo perf ftrace latency -T dput -a sleep 1
# DURATION | COUNT | GRAPH |
0 - 1 us | 2098375 | ############################# |
1 - 2 us | 61 | |
2 - 4 us | 33 | |
4 - 8 us | 13 | |
8 - 16 us | 124 | |
16 - 32 us | 123 | |
32 - 64 us | 1 | |
64 - 128 us | 0 | |
128 - 256 us | 1 | |
256 - 512 us | 0 | |
Better granularity with nsec:
$ sudo perf ftrace latency -T dput -a -n sleep 1
# DURATION | COUNT | GRAPH |
0 - 1 us | 0 | |
1 - 2 ns | 0 | |
2 - 4 ns | 0 | |
4 - 8 ns | 0 | |
8 - 16 ns | 0 | |
16 - 32 ns | 0 | |
32 - 64 ns | 0 | |
64 - 128 ns | 1163434 | ############## |
128 - 256 ns | 914102 | ############# |
256 - 512 ns | 884 | |
512 - 1024 ns | 613 | |
1 - 2 us | 31 | |
2 - 4 us | 17 | |
4 - 8 us | 7 | |
8 - 16 us | 123 | |
16 - 32 us | 83 | |
perf lock:
- Add -c/--combine-locks option to merge lock instances in the same
class into a single entry.
# perf lock report -c
Name acquired contended avg wait(ns) total wait(ns) max wait(ns) min wait(ns)
rcu_read_lock 251225 0 0 0 0 0
hrtimer_bases.lock 39450 0 0 0 0 0
&sb->s_type->i_l... 10301 1 662 662 662 662
ptlock_ptr(page) 10173 2 701 1402 760 642
&(ei->i_block_re... 8732 0 0 0 0 0
&xa->xa_lock 8088 0 0 0 0 0
&base->lock 6705 0 0 0 0 0
&p->pi_lock 5549 0 0 0 0 0
&dentry->d_lockr... 5010 4 1274 5097 1844 789
&ep->lock 3958 0 0 0 0 0
- Add -F/--field option to customize the list of fields to output:
$ perf lock report -F contended,wait_max -k avg_wait
Name contended max wait(ns) avg wait(ns)
slock-AF_INET6 1 23543 23543
&lruvec->lru_lock 5 18317 11254
slock-AF_INET6 1 10379 10379
rcu_node_1 1 2104 2104
&dentry->d_lockr... 1 1844 1844
&dentry->d_lockr... 1 1672 1672
&newf->file_lock 15 2279 1025
&dentry->d_lockr... 1 792 792
- Add --synth=no option for record, as there is no need to symbolize,
lock names comes from the tracepoints.
perf record:
- Threaded recording, opt-in, via the new --threads command line
option.
- Improve AMD IBS (Instruction-Based Sampling) error handling
messages.
perf script:
- Add 'brstackinsnlen' field (use it with -F) for branch stacks.
- Output branch sample type in 'perf script'.
perf report:
- Add "addr_from" and "addr_to" sort dimensions.
- Print branch stack entry type in 'perf report --dump-raw-trace'
- Fix symbolization for chrooted workloads.
Hardware tracing:
Intel PT:
- Add CFE (Control Flow Event) and EVD (Event Data) packets support.
- Add MODE.Exec IFLAG bit support.
Explanation about these features from the "Intel® 64 and IA-32
architectures software developer’s manual combined volumes: 1, 2A,
2B, 2C, 2D, 3A, 3B, 3C, 3D, and 4" PDF at:
https://cdrdv2.intel.com/v1/dl/getContent/671200
At page 3951:
"32.2.4
Event Trace is a capability that exposes details about the
asynchronous events, when they are generated, and when their
corresponding software event handler completes execution. These
include:
o Interrupts, including NMI and SMI, including the interrupt
vector when defined.
o Faults, exceptions including the fault vector.
- Page faults additionally include the page fault address,
when in context.
o Event handler returns, including IRET and RSM.
o VM exits and VM entries.¹
- VM exits include the values written to the “exit reason”
and “exit qualification” VMCS fields. INIT and SIPI events.
o TSX aborts, including the abort status returned for the RTM
instructions.
o Shutdown.
Additionally, it provides indication of the status of the
Interrupt Flag (IF), to indicate when interrupts are masked"
ARM CoreSight:
- Use advertised caps/min_interval as default sample_period on ARM
spe.
- Update deduction of TRCCONFIGR register for branch broadcast on
ARM's CoreSight ETM.
Vendor Events (JSON):
Intel:
- Update events and metrics for: Alderlake, Broadwell, Broadwell DE,
BroadwellX, CascadelakeX, Elkhartlake, Bonnell, Goldmont,
GoldmontPlus, Westmere EP-DP, Haswell, HaswellX, Icelake, IcelakeX,
Ivybridge, Ivytown, Jaketown, Knights Landing, Nehalem EP,
Sandybridge, Silvermont, Skylake, Skylake Server, SkylakeX,
Tigerlake, TremontX, Westmere EP-SP, and Westmere EX.
ARM:
- Add support for HiSilicon CPA PMU aliasing.
perf stat:
- Fix forked applications enablement of counters.
- The 'slots' should only be printed on a different order than the
one specified on the command line when 'topdown' events are
present, fix it.
Miscellaneous:
- Sync msr-index, cpufeatures header files with the kernel sources.
- Stop using some deprecated libbpf APIs in 'perf trace'.
- Fix some spelling mistakes.
- Refactor the maps pointers usage to pave the way for using refcount
debugging.
- Only offer the --tui option on perf top, report and annotate when
perf was built with libslang.
- Don't mention --to-ctf in 'perf data --help' when not linking with
the required library, libbabeltrace.
- Use ARRAY_SIZE() instead of ad hoc equivalent, spotted by
array_size.cocci.
- Enhance the matching of sub-commands abbreviations:
'perf c2c rec' -> 'perf c2c record'
'perf c2c recport -> error
- Set build-id using build-id header on new mmap records.
- Fix generation of 'perf --version' string.
perf test:
- Add test for the arm_spe event.
- Add test to check unwinding using fame-pointer (fp) mode on arm64.
- Make metric testing more robust in 'perf test'.
- Add error message for unsupported branch stack cases.
libperf:
- Add API for allocating new thread map array.
- Fix typo in perf_evlist__open() failure error messages in libperf
tests.
perf c2c:
- Replace bitmap_weight() with bitmap_empty() where appropriate"
* tag 'perf-tools-for-v5.18-2022-03-26' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux: (143 commits)
perf evsel: Improve AMD IBS (Instruction-Based Sampling) error handling messages
perf python: Add perf_env stubs that will be needed in evsel__open_strerror()
perf tools: Enhance the matching of sub-commands abbreviations
libperf tests: Fix typo in perf_evlist__open() failure error messages
tools arm64: Import cputype.h
perf lock: Add -F/--field option to control output
perf lock: Extend struct lock_key to have print function
perf lock: Add --synth=no option for record
tools headers cpufeatures: Sync with the kernel sources
tools headers cpufeatures: Sync with the kernel sources
perf stat: Fix forked applications enablement of counters
tools arch x86: Sync the msr-index.h copy with the kernel sources
perf evsel: Make evsel__env() always return a valid env
perf build-id: Fix spelling mistake "Cant" -> "Can't"
perf header: Fix spelling mistake "could't" -> "couldn't"
perf script: Add 'brstackinsnlen' for branch stacks
perf parse-events: Move slots only with topdown
perf ftrace latency: Update documentation
perf ftrace latency: Add -n/--use-nsec option
perf tools: Fix version kernel tag
...
|
||
|---|---|---|
| .. | ||
| arm-spe-decoder | ||
| bpf_skel | ||
| c++ | ||
| cs-etm-decoder | ||
| include | ||
| intel-pt-decoder | ||
| libunwind | ||
| scripting-engines | ||
| affinity.c | ||
| affinity.h | ||
| amd-sample-raw.c | ||
| annotate.c | ||
| annotate.h | ||
| archinsn.h | ||
| arm-spe.c | ||
| arm-spe.h | ||
| arm64-frame-pointer-unwind-support.c | ||
| arm64-frame-pointer-unwind-support.h | ||
| auxtrace.c | ||
| auxtrace.h | ||
| block-info.c | ||
| block-info.h | ||
| block-range.c | ||
| block-range.h | ||
| bpf-event.c | ||
| bpf-event.h | ||
| bpf-loader.c | ||
| bpf-loader.h | ||
| bpf-prologue.c | ||
| bpf-prologue.h | ||
| bpf-utils.c | ||
| bpf-utils.h | ||
| bpf_counter.c | ||
| bpf_counter.h | ||
| bpf_counter_cgroup.c | ||
| bpf_ftrace.c | ||
| bpf_map.c | ||
| bpf_map.h | ||
| branch.c | ||
| branch.h | ||
| Build | ||
| build-id.c | ||
| build-id.h | ||
| cache.h | ||
| cacheline.c | ||
| cacheline.h | ||
| call-path.c | ||
| call-path.h | ||
| callchain.c | ||
| callchain.h | ||
| cap.c | ||
| cap.h | ||
| cgroup.c | ||
| cgroup.h | ||
| clockid.c | ||
| clockid.h | ||
| cloexec.c | ||
| cloexec.h | ||
| color.c | ||
| color.h | ||
| color_config.c | ||
| comm.c | ||
| comm.h | ||
| compress.h | ||
| config.c | ||
| config.h | ||
| copyfile.c | ||
| copyfile.h | ||
| counts.c | ||
| counts.h | ||
| cpu-set-sched.h | ||
| cpumap.c | ||
| cpumap.h | ||
| cputopo.c | ||
| cputopo.h | ||
| cs-etm.c | ||
| cs-etm.h | ||
| data-convert-bt.c | ||
| data-convert-json.c | ||
| data-convert.h | ||
| data.c | ||
| data.h | ||
| db-export.c | ||
| db-export.h | ||
| debug.c | ||
| debug.h | ||
| demangle-java.c | ||
| demangle-java.h | ||
| demangle-ocaml.c | ||
| demangle-ocaml.h | ||
| demangle-rust.c | ||
| demangle-rust.h | ||
| dlfilter.c | ||
| dlfilter.h | ||
| dso.c | ||
| dso.h | ||
| dsos.c | ||
| dsos.h | ||
| dump-insn.c | ||
| dump-insn.h | ||
| dwarf-aux.c | ||
| dwarf-aux.h | ||
| dwarf-regs.c | ||
| env.c | ||
| env.h | ||
| event.c | ||
| event.h | ||
| events_stats.h | ||
| evlist-hybrid.c | ||
| evlist-hybrid.h | ||
| evlist.c | ||
| evlist.h | ||
| evsel.c | ||
| evsel.h | ||
| evsel_config.h | ||
| evsel_fprintf.c | ||
| evsel_fprintf.h | ||
| evswitch.c | ||
| evswitch.h | ||
| expr.c | ||
| expr.h | ||
| expr.l | ||
| expr.y | ||
| find-map.c | ||
| fncache.c | ||
| fncache.h | ||
| ftrace.h | ||
| genelf.c | ||
| genelf.h | ||
| genelf_debug.c | ||
| generate-cmdlist.sh | ||
| get_current_dir_name.c | ||
| get_current_dir_name.h | ||
| hashmap.c | ||
| hashmap.h | ||
| header.c | ||
| header.h | ||
| help-unknown-cmd.c | ||
| help-unknown-cmd.h | ||
| hist.c | ||
| hist.h | ||
| intel-bts.c | ||
| intel-bts.h | ||
| intel-pt.c | ||
| intel-pt.h | ||
| intlist.c | ||
| intlist.h | ||
| iostat.c | ||
| iostat.h | ||
| jit.h | ||
| jitdump.c | ||
| jitdump.h | ||
| kvm-stat.h | ||
| levenshtein.c | ||
| levenshtein.h | ||
| llvm-utils.c | ||
| llvm-utils.h | ||
| lzma.c | ||
| machine.c | ||
| machine.h | ||
| map.c | ||
| map.h | ||
| map_symbol.h | ||
| maps.c | ||
| maps.h | ||
| mem-events.c | ||
| mem-events.h | ||
| mem2node.c | ||
| mem2node.h | ||
| memswap.c | ||
| memswap.h | ||
| metricgroup.c | ||
| metricgroup.h | ||
| mmap.c | ||
| mmap.h | ||
| namespaces.c | ||
| namespaces.h | ||
| ordered-events.c | ||
| ordered-events.h | ||
| parse-branch-options.c | ||
| parse-branch-options.h | ||
| parse-events-hybrid.c | ||
| parse-events-hybrid.h | ||
| parse-events.c | ||
| parse-events.h | ||
| parse-events.l | ||
| parse-events.y | ||
| parse-regs-options.c | ||
| parse-regs-options.h | ||
| parse-sublevel-options.c | ||
| parse-sublevel-options.h | ||
| path.c | ||
| path.h | ||
| perf-hooks-list.h | ||
| perf-hooks.c | ||
| perf-hooks.h | ||
| PERF-VERSION-GEN | ||
| perf_api_probe.c | ||
| perf_api_probe.h | ||
| perf_event_attr_fprintf.c | ||
| perf_regs.c | ||
| perf_regs.h | ||
| pfm.c | ||
| pfm.h | ||
| pmu-hybrid.c | ||
| pmu-hybrid.h | ||
| pmu.c | ||
| pmu.h | ||
| pmu.l | ||
| pmu.y | ||
| print_binary.c | ||
| print_binary.h | ||
| probe-event.c | ||
| probe-event.h | ||
| probe-file.c | ||
| probe-file.h | ||
| probe-finder.c | ||
| probe-finder.h | ||
| pstack.c | ||
| pstack.h | ||
| python-ext-sources | ||
| python.c | ||
| rb_resort.h | ||
| rblist.c | ||
| rblist.h | ||
| record.c | ||
| record.h | ||
| rlimit.c | ||
| rlimit.h | ||
| rwsem.c | ||
| rwsem.h | ||
| s390-cpumcf-kernel.h | ||
| s390-cpumsf-kernel.h | ||
| s390-cpumsf.c | ||
| s390-cpumsf.h | ||
| s390-sample-raw.c | ||
| sample-raw.c | ||
| sample-raw.h | ||
| session.c | ||
| session.h | ||
| setns.c | ||
| setup.py | ||
| sideband_evlist.c | ||
| smt.c | ||
| smt.h | ||
| sort.c | ||
| sort.h | ||
| spark.c | ||
| spark.h | ||
| srccode.c | ||
| srccode.h | ||
| srcline.c | ||
| srcline.h | ||
| stat-display.c | ||
| stat-shadow.c | ||
| stat.c | ||
| stat.h | ||
| strbuf.c | ||
| strbuf.h | ||
| stream.c | ||
| stream.h | ||
| strfilter.c | ||
| strfilter.h | ||
| string.c | ||
| string2.h | ||
| strlist.c | ||
| strlist.h | ||
| svghelper.c | ||
| svghelper.h | ||
| symbol-elf.c | ||
| symbol-minimal.c | ||
| symbol.c | ||
| symbol.h | ||
| symbol_conf.h | ||
| symbol_fprintf.c | ||
| symsrc.h | ||
| synthetic-events.c | ||
| synthetic-events.h | ||
| syscalltbl.c | ||
| syscalltbl.h | ||
| target.c | ||
| target.h | ||
| term.c | ||
| term.h | ||
| thread-stack.c | ||
| thread-stack.h | ||
| thread.c | ||
| thread.h | ||
| thread_map.c | ||
| thread_map.h | ||
| time-utils.c | ||
| time-utils.h | ||
| tool.h | ||
| top.c | ||
| top.h | ||
| topdown.c | ||
| topdown.h | ||
| trace-event-info.c | ||
| trace-event-parse.c | ||
| trace-event-read.c | ||
| trace-event-scripting.c | ||
| trace-event.c | ||
| trace-event.h | ||
| trigger.h | ||
| tsc.c | ||
| tsc.h | ||
| units.c | ||
| units.h | ||
| unwind-libdw.c | ||
| unwind-libdw.h | ||
| unwind-libunwind-local.c | ||
| unwind-libunwind.c | ||
| unwind.h | ||
| usage.c | ||
| util.c | ||
| util.h | ||
| values.c | ||
| values.h | ||
| vdso.c | ||
| vdso.h | ||
| zlib.c | ||
| zstd.c | ||