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linux-yocto/tools/perf/bench
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Thomas Richter fe2ada4ed4 perf bench: Fix perf bench syscall loop count 
[ Upstream commit 957d194163 ]

Command 'perf bench syscall fork -l 100000' offers option -l to run for
a specified number of iterations. However this option is not always
observed. The number is silently limited to 10000 iterations as can be
seen:

Output before:
 # perf bench syscall fork -l 100000
 # Running 'syscall/fork' benchmark:
 # Executed 10,000 fork() calls
     Total time: 23.388 [sec]

    2338.809800 usecs/op
            427 ops/sec
 #

When explicitly specified with option -l or --loops, also observe
higher number of iterations:

Output after:
 # perf bench syscall fork -l 100000
 # Running 'syscall/fork' benchmark:
 # Executed 100,000 fork() calls
     Total time: 716.982 [sec]

    7169.829510 usecs/op
            139 ops/sec
 #

This patch fixes the issue for basic execve fork and getpgid.

Fixes: ece7f7c050 ("perf bench syscall: Add fork syscall benchmark")
Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
Acked-by: Sumanth Korikkar <sumanthk@linux.ibm.com>
Tested-by: Athira Rajeev <atrajeev@linux.ibm.com>
Cc: Tiezhu Yang <yangtiezhu@loongson.cn>
Link: https://lore.kernel.org/r/20250304092349.2618082-1-tmricht@linux.ibm.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2025-04-10 14:37:33 +02:00
..
bench.h perf tools changes for v6.6: 2023-09-09 20:06:17 -07:00
breakpoint.c perf bench breakpoint: Skip run if no breakpoints available 2023-08-23 08:39:02 -03:00
Build perf tools changes for v6.6: 2023-09-09 20:06:17 -07:00
epoll-ctl.c perf bench epoll: Fix missing frees/puts on the exit path 2023-06-12 18:18:14 -03:00
epoll-wait.c perf bench: Fix undefined behavior in cmpworker() 2025-02-17 09:40:20 +01:00
evlist-open-close.c
find-bit-bench.c
futex-hash.c
futex-lock-pi.c perf bench futex: Avoid memory leaks from pthread_attr 2023-06-12 18:18:14 -03:00
futex-requeue.c perf bench futex: Avoid memory leaks from pthread_attr 2023-06-12 18:18:14 -03:00
futex-wake-parallel.c perf bench futex: Avoid memory leaks from pthread_attr 2023-06-12 18:18:14 -03:00
futex-wake.c perf bench futex: Avoid memory leaks from pthread_attr 2023-06-12 18:18:14 -03:00
futex.h
inject-buildid.c perf bench internals inject-build-id: Fix trap divide when collecting just one DSO 2024-06-12 11:12:26 +02:00
kallsyms-parse.c
mem-functions.c
mem-memcpy-arch.h
mem-memcpy-x86-64-asm-def.h tools headers: Update the copy of x86's mem{cpy,set}_64.S used in 'perf bench' 2023-05-17 10:42:19 -03:00
mem-memcpy-x86-64-asm.S tools headers: Update the copy of x86's mem{cpy,set}_64.S used in 'perf bench' 2023-05-17 10:42:19 -03:00
mem-memset-arch.h
mem-memset-x86-64-asm-def.h tools headers: Update the copy of x86's mem{cpy,set}_64.S used in 'perf bench' 2023-05-17 10:42:19 -03:00
mem-memset-x86-64-asm.S tools headers: Update the copy of x86's mem{cpy,set}_64.S used in 'perf bench' 2023-05-17 10:42:19 -03:00
numa.c
pmu-scan.c perf pmu: Abstract alias/event struct 2023-08-24 10:42:46 -03:00
sched-messaging.c perf bench sched messaging: Free contexts on exit 2023-06-12 18:18:14 -03:00
sched-pipe.c
sched-seccomp-notify.c perf bench sched-seccomp-notify: Use the tools copy of seccomp.h UAPI 2023-09-13 08:49:00 -03:00
synthesize.c
syscall.c perf bench: Fix perf bench syscall loop count 2025-04-10 14:37:33 +02:00
uprobe.c perf bench uprobe: Remove lib64 from libc.so.6 binary path 2024-06-12 11:12:19 +02:00