linux-kernel - Re: [PATCH 2/5] perf bench uprobe: Print diff to baseline

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20230721234355.b0a7ae245a2010d4a5c08a52@kernel.org>
Date:   Fri, 21 Jul 2023 23:43:55 +0900
From:   Masami Hiramatsu (Google) <mhiramat@...nel.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Namhyung Kim <namhyung@...nel.org>, Ingo Molnar <mingo@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Jiri Olsa <jolsa@...nel.org>, Ian Rogers <irogers@...gle.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Clark Williams <williams@...hat.com>,
        Kate Carcia <kcarcia@...hat.com>, linux-kernel@...r.kernel.org,
        linux-perf-users@...r.kernel.org,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        Andre Fredette <anfredet@...hat.com>,
        Dave Tucker <datucker@...hat.com>,
        Derek Barbosa <debarbos@...hat.com>,
        Masami Hiramatsu <mhiramat@...nel.org>
Subject: Re: [PATCH 2/5] perf bench uprobe: Print diff to baseline

On Wed, 19 Jul 2023 17:49:07 -0300
Arnaldo Carvalho de Melo <acme@...nel.org> wrote:

> From: Arnaldo Carvalho de Melo <acme@...hat.com>
> 
> This is just prep work to show the diff to the unmodified workload.

Looks good to me, just one comment below.

Reviewed-by: Masami Hiramatsu (Google) <mhiramat@...nel.org>

> 
> Cc: Adrian Hunter <adrian.hunter@...el.com>
> Cc: Andre Fredette <anfredet@...hat.com>
> Cc: Clark Williams <williams@...hat.com>
> Cc: Dave Tucker <datucker@...hat.com>
> Cc: Derek Barbosa <debarbos@...hat.com>
> Cc: Ian Rogers <irogers@...gle.com>
> Cc: Jiri Olsa <jolsa@...nel.org>
> Cc: Masami Hiramatsu (Google) <mhiramat@...nel.org>
> Cc: Namhyung Kim <namhyung@...nel.org>
> Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
> ---
>  tools/perf/bench/uprobe.c | 27 ++++++++++++++++++++++++---
>  1 file changed, 24 insertions(+), 3 deletions(-)
> 
> diff --git a/tools/perf/bench/uprobe.c b/tools/perf/bench/uprobe.c
> index 707174220a76701f..60e7c43298d8cf56 100644
> --- a/tools/perf/bench/uprobe.c
> +++ b/tools/perf/bench/uprobe.c
> @@ -34,6 +34,29 @@ static const char * const bench_uprobe_usage[] = {
>  	NULL
>  };
>  
> +static int bench_uprobe_format__default_fprintf(const char *name, const char *unit, u64 diff, FILE *fp)
> +{
> +	static u64 baseline;
> +	s64 diff_to_baseline = diff - baseline;
> +	int printed = fprintf(fp, "# Executed %'d %s calls\n", loops, name);
> +
> +	printed += fprintf(fp, " %14s: %'" PRIu64 " %ss", "Total time", diff, unit);
> +
> +	if (baseline)
> +		printed += fprintf(fp, " %s%'" PRId64 " to baseline", diff_to_baseline > 0 ? "+" : "", diff_to_baseline);
> +
> +	printed += fprintf(fp, "\n\n %'.3f %ss/op", (double)diff / (double)loops, unit);

Just a nit, do we need to repeat (double) cast on the denominator side too?

> +
> +	if (baseline)
> +		printed += fprintf(fp, " %'.3f %ss/op to baseline", (double)diff_to_baseline / (double)loops, unit);
> +	else
> +		baseline = diff;
> +
> +	fputc('\n', fp);
> +
> +	return printed + 1;
> +}
> +
>  static int bench_uprobe(int argc, const char **argv)
>  {
>  	const char *name = "usleep(1000)", *unit = "usec";
> @@ -56,9 +79,7 @@ static int bench_uprobe(int argc, const char **argv)
>  
>  	switch (bench_format) {
>  	case BENCH_FORMAT_DEFAULT:
> -		printf("# Executed %'d %s calls\n", loops, name);
> -		printf(" %14s: %'" PRIu64 " %ss\n\n", "Total time", diff, unit);
> -		printf(" %'.3f %ss/op\n", (double)diff / (double)loops, unit);
> +		bench_uprobe_format__default_fprintf(name, unit, diff, stdout);
>  		break;
>  
>  	case BENCH_FORMAT_SIMPLE:
> -- 
> 2.41.0
> 


-- 
Masami Hiramatsu (Google) <mhiramat@...nel.org>