Thomas Richter fc1b20f168 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 14:39:23 +02:00

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bench.h

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breakpoint.c

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Build

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epoll-ctl.c

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epoll-wait.c

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evlist-open-close.c

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find-bit-bench.c

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futex-hash.c

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futex-lock-pi.c

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futex-requeue.c

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futex-wake-parallel.c

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futex-wake.c

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futex.h

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inject-buildid.c

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kallsyms-parse.c

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mem-functions.c

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mem-memcpy-arch.h

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mem-memcpy-x86-64-asm-def.h

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mem-memcpy-x86-64-asm.S

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mem-memset-arch.h

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mem-memset-x86-64-asm-def.h

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mem-memset-x86-64-asm.S

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numa.c

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pmu-scan.c

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sched-messaging.c

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sched-pipe.c

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sched-seccomp-notify.c

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synthesize.c

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syscall.c

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uprobe.c

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