linux-kernel - Re: [PATCH 1/5] perf script: Fix unnecessary machine

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Date:   Tue, 10 Aug 2021 15:25:49 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Adrian Hunter <adrian.hunter@...el.com>
Cc:     Jiri Olsa <jolsa@...hat.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/5] perf script: Fix unnecessary machine_resolve()

Em Tue, Aug 10, 2021 at 02:48:09PM +0300, Adrian Hunter escreveu:
> machine_resolve() may have already been called. Test for that to avoid
> calling it again unnecessarily.

By some dlfilter function, right...

Perhaps it would be better for machine__resolve() itself to check that?

Probably we'll need a 'force' arg, or have __machine__resolve() that
does exactly what machine__resolve() does today and then tools wanting
to force it to avoid using whatever is 'cached'?

- Arnaldo
 
> Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
> ---
>  tools/perf/builtin-script.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
> index e2e165b53499..f469354155f1 100644
> --- a/tools/perf/builtin-script.c
> +++ b/tools/perf/builtin-script.c
> @@ -2212,7 +2212,7 @@ static int process_sample_event(struct perf_tool *tool,
>  	if (filter_cpu(sample))
>  		goto out_put;
>  
> -	if (machine__resolve(machine, &al, sample) < 0) {
> +	if (!al.thread && machine__resolve(machine, &al, sample) < 0) {
>  		pr_err("problem processing %d event, skipping it.\n",
>  		       event->header.type);
>  		ret = -1;
> -- 
> 2.17.1
> 

-- 

- Arnaldo