linux-kernel - Re: [PATCH v2 5/6] perf test: Add timeout to datasym workload

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Message-ID: <62f8f2a2-dcd2-4c6a-882f-dfa50482ffb0@linux.ibm.com>
Date: Tue, 4 Mar 2025 08:37:30 +0100
From: Thomas Richter <tmricht@...ux.ibm.com>
To: Namhyung Kim <namhyung@...nel.org>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Ian Rogers <irogers@...gle.com>, Kan Liang <kan.liang@...ux.intel.com>
Cc: Jiri Olsa <jolsa@...nel.org>, Adrian Hunter <adrian.hunter@...el.com>,
        Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>, linux-perf-users@...r.kernel.org,
        Leo Yan <leo.yan@....com>
Subject: Re: [PATCH v2 5/6] perf test: Add timeout to datasym workload

On 3/4/25 03:28, Namhyung Kim wrote:
> Unlike others it has an infinite loop that make it annoying to call.
> Make it finish after 1 second and handle command-line argument to change
> the setting.
> 
> Cc: Thomas Richter <tmricht@...ux.ibm.com>
> Cc: Leo Yan <leo.yan@....com>
> Signed-off-by: Namhyung Kim <namhyung@...nel.org>
> ---
>  tools/perf/tests/workloads/datasym.c | 23 +++++++++++++++++++++--
>  1 file changed, 21 insertions(+), 2 deletions(-)
> 
> diff --git a/tools/perf/tests/workloads/datasym.c b/tools/perf/tests/workloads/datasym.c
> index 8e08fc75a973e5f7..8ddb2aa6a049e343 100644
> --- a/tools/perf/tests/workloads/datasym.c
> +++ b/tools/perf/tests/workloads/datasym.c
> @@ -1,3 +1,6 @@
> +#include <stdlib.h>
> +#include <signal.h>
> +#include <unistd.h>
>  #include <linux/compiler.h>
>  #include "../tests.h"
>  
> @@ -12,9 +15,25 @@ static buf buf1 = {
>  	.reserved[0] = 1,
>  };
>  
> -static int datasym(int argc __maybe_unused, const char **argv __maybe_unused)
> +static volatile sig_atomic_t done;
> +
> +static void sighandler(int sig __maybe_unused)
> +{
> +	done = 1;
> +}
> +
> +static int datasym(int argc, const char **argv)
>  {
> -	for (;;) {
> +	int sec = 1;
> +
> +	if (argc > 0)
> +		sec = atoi(argv[0]);
> +
> +	signal(SIGINT, sighandler);
> +	signal(SIGALRM, sighandler);
> +	alarm(sec);
> +
> +	while (!done) {
>  		buf1.data1++;
>  		if (buf1.data1 == 123) {
>  			/*

Tested-by: Thomas Richter <tmricht@...ux.ibm.com>
-- 
Thomas Richter, Dept 3303, IBM s390 Linux Development, Boeblingen, Germany
--
IBM Deutschland Research & Development GmbH

Vorsitzender des Aufsichtsrats: Wolfgang Wendt

Geschäftsführung: David Faller

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