Re: [PATCH 1/3] perf test: fix nanosleep check in the ftrace test

[Namhyung Kim <namhyung@kernel.org>]

On Mon, Apr 27, 2026 at 11:01:41AM +0200, Martin Kaiser wrote:
> The perf ftrace test case runs
> 
> perf ftrace profile --graph-opts depth=5 sleep 0.1
> 
> and checks that the output contains a *clock_nanosleep function with a
> count of 1.
> 
> This fails on a risc-v system that uses musl as its C library. musl's
> nanosleep syscall wrapper uses either the nanosleep or the
> clock_nanosleep syscall.
> 
> Filter for sys_*nanosleep to allow both syscalls.
> 
> Signed-off-by: Martin Kaiser <martin@kaiser.cx>

Acked-by: Namhyung Kim <namhyung@kernel.org>

Thanks,
Namhyung

> ---
>  tools/perf/tests/shell/ftrace.sh | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/tools/perf/tests/shell/ftrace.sh b/tools/perf/tests/shell/ftrace.sh
> index 7f8aafcbb761..9f6e590f6437 100755
> --- a/tools/perf/tests/shell/ftrace.sh
> +++ b/tools/perf/tests/shell/ftrace.sh
> @@ -71,9 +71,10 @@ test_ftrace_profile() {
>      grep ^# "${output}"
>      time_re="[[:space:]]+1[[:digit:]]{5}\.[[:digit:]]{3}"
>      # 100283.000 100283.000 100283.000          1   __x64_sys_clock_nanosleep
> -    # Check for one *clock_nanosleep line with a Count of just 1 that takes a bit more than 0.1 seconds
> -    # Strip the _x64_sys part to work with other architectures
> -    grep -E "^${time_re}${time_re}${time_re}[[:space:]]+1[[:space:]]+.*clock_nanosleep" "${output}"
> +    # Check for one *sys_*nanosleep line with a Count of just 1 that takes a bit more than 0.1 seconds
> +    # Strip the _x64_ part to work with other architectures, strip the clock part to support
> +    # C libraries that use the nanosleep syscall instead of clock_nanosleep
> +    grep -E "^${time_re}${time_re}${time_re}[[:space:]]+1[[:space:]]+.*sys_.*nanosleep" "${output}"
>      echo "perf ftrace profile test  [Success]"
>  }
>  
> -- 
> 2.43.7
>