linux-kernel - Re: [PATCH] Bugfix perf script -F ip,brstack (and brstackoff)

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Date:   Fri, 6 Oct 2017 09:25:07 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Mark Santaniello <marksan@...com>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Bugfix perf script -F ip,brstack (and brstackoff)

Em Fri, Oct 06, 2017 at 01:07:22AM -0700, Mark Santaniello escreveu:
> Prior to commit 55b9b50811ca ("perf script: Support -F brstack,dso and
> brstacksym,dso"), we were printing a space before the brstack data. It
> seems that this space was important.  Without it, parsing is difficult.
> 
> Very sorry for the mistake.

Thanks, applied and added:

    Cc: 4.13+ <stable@...r.kernel.org>

As:

[acme@...et linux]$ git tag --contains 55b9b50811ca | grep ^v4
v4.13
v4.13-rc1
v4.13-rc2
v4.13-rc3
v4.13-rc4
v4.13-rc5
v4.13-rc6
v4.13-rc7
v4.14-rc1
v4.14-rc2
v4.14-rc3
[acme@...et linux]$
 
> Notice here how the "ip" and "brstack" run together:
> 
> $ perf script -F ip,brstack | head -n 1
>           22e18c40x22e19e2/0x22e190b/P/-/-/0 0x22e19a1/0x22e19d0/P/-/-/0 0x22e195d/0x22e1990/P/-/-/0 0x22e18e9/0x22e1943/P/-/-/0 0x22e1a69/0x22e18c0/P/-/-/0 0x22e19f7/0x22e1a20/P/-/-/0 0x22e1910/0x22e19ee/P/-/-/0 0x22e19e2/0x22e190b/P/-/-/0 0x22e19a1/0x22e19d0/P/-/-/0 0x22e195d/0x22e1990/P/-/-/0 0x22e18e9/0x22e1943/P/-/-/0 0x22e1a69/0x22e18c0/P/-/-/0 0x22e19f7/0x22e1a20/P/-/-/0 0x22e1910/0x22e19ee/P/-/-/0 0x22e19e2/0x22e190b/P/-/-/0 0x22e19a1/0x22e19d0/P/-/-/0
> 
> After this diff, sanity is restored:
> 
> $ perf script -F ip,brstack | head -n 1
>           22e18c4 0x22e19e2/0x22e190b/P/-/-/0  0x22e19a1/0x22e19d0/P/-/-/0  0x22e195d/0x22e1990/P/-/-/0  0x22e18e9/0x22e1943/P/-/-/0  0x22e1a69/0x22e18c0/P/-/-/0  0x22e19f7/0x22e1a20/P/-/-/0  0x22e1910/0x22e19ee/P/-/-/0  0x22e19e2/0x22e190b/P/-/-/0  0x22e19a1/0x22e19d0/P/-/-/0  0x22e195d/0x22e1990/P/-/-/0  0x22e18e9/0x22e1943/P/-/-/0  0x22e1a69/0x22e18c0/P/-/-/0  0x22e19f7/0x22e1a20/P/-/-/0  0x22e1910/0x22e19ee/P/-/-/0  0x22e19e2/0x22e190b/P/-/-/0  0x22e19a1/0x22e19d0/P/-/-/0
> 
> Signed-off-by: Mark Santaniello <marksan@...com>
> ---
>  tools/perf/builtin-script.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
> index 3d4c3b5..0c977b6 100644
> --- a/tools/perf/builtin-script.c
> +++ b/tools/perf/builtin-script.c
> @@ -586,7 +586,7 @@ static void print_sample_brstack(struct perf_sample *sample,
>  			thread__find_addr_map(thread, sample->cpumode, MAP__FUNCTION, to, &alt);
>  		}
>  
> -		printf("0x%"PRIx64, from);
> +		printf(" 0x%"PRIx64, from);
>  		if (PRINT_FIELD(DSO)) {
>  			printf("(");
>  			map__fprintf_dsoname(alf.map, stdout);
> @@ -681,7 +681,7 @@ static void print_sample_brstackoff(struct perf_sample *sample,
>  		if (alt.map && !alt.map->dso->adjust_symbols)
>  			to = map__map_ip(alt.map, to);
>  
> -		printf("0x%"PRIx64, from);
> +		printf(" 0x%"PRIx64, from);
>  		if (PRINT_FIELD(DSO)) {
>  			printf("(");
>  			map__fprintf_dsoname(alf.map, stdout);
> -- 
> 2.9.5