Jiri Olsa 82bf311e15 perf stat: Use group read for event groups ... Make perf stat use group read if there are groups defined. The group read will get the values for all member of groups within a single syscall instead of calling read syscall for every event. We can see considerable less amount of kernel cycles spent on single group read, than reading each event separately, like for following perf stat command: # perf stat -e {cycles,instructions} -I 10 -a sleep 1 Monitored with "perf stat -r 5 -e '{cycles:u,cycles:k}'" Before: 24,325,676 cycles:u 297,040,775 cycles:k 1.038554134 seconds time elapsed After: 25,034,418 cycles:u 158,256,395 cycles:k 1.036864497 seconds time elapsed The perf_evsel__open fallback changes contributed by Andi Kleen. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/20170726120206.9099-4-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>		2017-07-26 14:25:44 -03:00
..
arch	perf report: Fix kernel symbol adjustment for s390x	2017-07-25 11:23:50 -03:00
bench	perf tools: Use __maybe_unused consistently	2017-06-19 15:27:06 -03:00
Documentation	perf top: Support lookup of symbols in other mount namespaces.	2017-07-25 22:43:16 -03:00
jvmti	perf jit: fix typo: "incalid" -> "invalid"	2017-06-27 11:55:06 -03:00
pmu-events	perf jevents: Make build fail on JSON parse error	2017-07-25 22:46:36 -03:00
python	perf python: Add tracepoint example	2016-07-12 16:23:35 -03:00
scripts	perf intel-pt: Add example script for power events and PTWRITE	2017-06-30 11:50:53 -03:00
tests	perf tests attr: Add optional term	2017-07-18 23:14:22 -03:00
trace	perf trace beauty clone: Suppress unused args according to 'flags' arg	2017-07-20 11:03:10 -03:00
ui	perf annotate: Rename 'sum' to 'nr_samples' in struct sym_hist	2017-07-21 08:23:49 -03:00
util	perf stat: Use group read for event groups	2017-07-26 14:25:44 -03:00
.gitignore	perf tools: Ignore generated files pmu-events/{jevents,pmu-events.c} for git	2017-03-13 10:59:36 -03:00
Build	perf trace: Only build tools/perf/trace/beauty/ when building 'perf trace'	2017-07-18 23:13:52 -03:00
builtin-annotate.c	perf annotate: Process tracing data in pipe mode	2017-07-25 11:23:52 -03:00
builtin-bench.c	perf tools: Remove unused 'prefix' from builtin functions	2017-03-27 11:58:09 -03:00
builtin-buildid-cache.c	perf buildid-cache: Cache debuginfo	2017-07-18 23:14:11 -03:00
builtin-buildid-list.c	perf tools: Include errno.h where needed	2017-04-19 13:01:51 -03:00
builtin-c2c.c	perf tools: Replace error() with pr_err()	2017-06-27 11:22:31 -03:00
builtin-config.c	tools include: Adopt strstarts() from the kernel	2017-07-20 15:46:10 -03:00
builtin-data.c	perf tools: Remove unused 'prefix' from builtin functions	2017-03-27 11:58:09 -03:00
builtin-diff.c	perf config: Do not die when parsing u64 or int config values	2017-06-27 11:44:58 -03:00
builtin-evlist.c	perf tools: Remove unused 'prefix' from builtin functions	2017-03-27 11:58:09 -03:00
builtin-ftrace.c	tools include: Adopt strstarts() from the kernel	2017-07-20 15:46:10 -03:00
builtin-help.c	tools include: Adopt strstarts() from the kernel	2017-07-20 15:46:10 -03:00
builtin-inject.c	perf tools: Add feature header record to pipe-mode	2017-07-18 23:14:36 -03:00
builtin-kallsyms.c	perf tools: Including missing inttypes.h header	2017-04-19 13:01:46 -03:00
builtin-kmem.c	perf tools: Replace error() with pr_err()	2017-06-27 11:22:31 -03:00
builtin-kvm.c	perf tools: Remove poll.h and wait.h from util.h	2017-04-24 13:43:34 -03:00
builtin-list.c	perf tools: Remove unused 'prefix' from builtin functions	2017-03-27 11:58:09 -03:00
builtin-lock.c	perf tools: Include errno.h where needed	2017-04-19 13:01:51 -03:00
builtin-mem.c	perf tools: Use just forward declarations for struct thread where possible	2017-04-24 13:43:35 -03:00
builtin-probe.c	perf buildid-cache: Support binary objects from other namespaces	2017-07-18 23:14:11 -03:00
builtin-record.c	perf tools: Add feature header record to pipe-mode	2017-07-18 23:14:36 -03:00
builtin-report.c	perf report: Make --branch-history work without callgraphs(-g) option in perf record	2017-07-25 22:46:03 -03:00
builtin-sched.c	perf tools: Replace error() with pr_err()	2017-06-27 11:22:31 -03:00
builtin-script.c	perf script: Remove some bogus error handling	2017-07-25 22:43:17 -03:00
builtin-stat.c	perf stat: Use group read for event groups	2017-07-26 14:25:44 -03:00
builtin-timechart.c	perf tools: Use just forward declarations for struct thread where possible	2017-04-24 13:43:35 -03:00
builtin-top.c	perf top: Support lookup of symbols in other mount namespaces.	2017-07-25 22:43:16 -03:00
builtin-trace.c	perf trace: Filter out 'sshd' in the tracer ancestry in syswide tracing	2017-07-20 15:16:25 -03:00
builtin-version.c	perf tools: Remove string.h, unistd.h and sys/stat.h from util.h	2017-04-24 13:43:33 -03:00
builtin.h	perf tools: Remove stale prototypes from builtin.h	2017-04-24 13:43:33 -03:00
check-headers.sh	tools include uapi: Grab a copy of linux/sched.h	2017-07-20 11:02:51 -03:00
command-list.txt	perf tools: Missing c2c command in command-list	2017-03-13 10:59:31 -03:00
CREDITS
design.txt
Makefile	perf build tests: Do parallell builds with 'build-test'	2016-02-04 15:57:00 -03:00
Makefile.config	tools build: Add test for setns()	2017-07-18 23:14:08 -03:00
Makefile.perf	perf jvmti: Fix linker error when libelf config is disabled	2017-07-25 11:23:53 -03:00
MANIFEST	perf tools: Add tools/include/uapi/asm-generic/fcntl.h to the MANIFEST	2017-07-25 22:46:37 -03:00
perf-archive.sh
perf-completion.sh
perf-read-vdso.c
perf-sys.h	perf powerpc: Fix build-test failure	2016-09-08 13:44:07 -03:00
perf-with-kcore.sh
perf.c	tools include: Adopt strstarts() from the kernel	2017-07-20 15:46:10 -03:00
perf.h	perf tests attr: Add test_attr__ready function	2017-07-18 23:14:15 -03:00