linux-kernel - Re: [PATCH] perf tools: Add --debug-file option to redirect debug output

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Message-ID: <ZUEhJrXUWHyv959i@kernel.org>
Date:   Tue, 31 Oct 2023 12:45:42 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Yang Jihong <yangjihong1@...wei.com>
Cc:     Jiri Olsa <jolsa@...nel.org>, peterz@...radead.org,
        mingo@...hat.com, mark.rutland@....com,
        alexander.shishkin@...ux.intel.com, namhyung@...nel.org,
        irogers@...gle.com, adrian.hunter@...el.com,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] perf tools: Add --debug-file option to redirect debug
 output

Em Tue, Oct 31, 2023 at 10:55:23AM +0000, Yang Jihong escreveu:
> Currently, debug messages is output to stderr, add --debug-file option to
> support redirection to a specified file.
 
>   # perf --debug-file /tmp/perf.log record -v true
>   [ perf record: Woken up 1 times to write data ]
>   [ perf record: Captured and wrote 0.013 MB perf.data (26 samples) ]
>   # cat /tmp/perf.log
>   DEBUGINFOD_URLS=
>   Using CPUID GenuineIntel-6-3E-4

Ok, reusing debug_set_file() that was introduced to be used in the
'perf daemon' subcommand.

Acked-by: Arnaldo Carvalho de Melo <acme@...hat.com>

- Arnaldo