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From: Namhyung Kim <namhyung@kernel.org>
To: Jiri Olsa <jolsa@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>,
	lkml <linux-kernel@vger.kernel.org>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	Ingo Molnar <mingo@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Michael Petlan <mpetlan@redhat.com>,
	Ian Rogers <irogers@google.com>,
	Stephane Eranian <eranian@google.com>,
	Alexei Budankov <abudankov@huawei.com>
Subject: Re: [PATCH 08/22] perf daemon: Add config file change check
Date: Tue, 19 Jan 2021 14:31:55 +0900	[thread overview]
Message-ID: <CAM9d7cgSx7WFo5fwxSoU9h2vD19LJxaM7p5i5+W+HLM6kpkwpw@mail.gmail.com> (raw)
In-Reply-To: <20210102220441.794923-9-jolsa@kernel.org>

On Sun, Jan 3, 2021 at 7:05 AM Jiri Olsa <jolsa@kernel.org> wrote:
>
> Adding support to detect daemon's config file changes
> and re-read the configuration when that happens.

Hmm.. maybe some of the code in the previous commit can be moved here.

Thanks,
Namhyung

>
> Using inotify file descriptor pluged into the main
> fdarray object for polling.
>
> Example:
>
>   # cat ~/.perfconfig
>   [daemon]
>   base=/opt/perfdata
>
>   [session-cycles]
>   run = -m 10M -e cycles --overwrite --switch-output -a
>
> Starting the daemon:
>
>   # perf daemon start
>
> Check sessions:
>
>   # perf daemon
>   [772262:daemon] base: /opt/perfdata
>   [772263:cycles] perf record -m 10M -e cycles --overwrite --switch-output -a
>
> Change '-m 10M' to '-m 20M', and check daemon log:
>
>   # tail -f /opt/perfdata/output
>   [2021-01-02 20:31:41.234045] daemon started (pid 772262)
>   [2021-01-02 20:31:41.235072] reconfig: ruining session [cycles:772263]: -m 10M -e cycles --overwrite --switch-output -a
>   [2021-01-02 20:32:08.310137] reconfig: session 'cycles' killed
>   [2021-01-02 20:32:08.310847] reconfig: ruining session [cycles:772338]: -m 20M -e cycles --overwrite --switch-output -a
>
> And the session list:
>
>   # perf daemon
>   [772262:daemon] base: /opt/perfdata
>   [772338:cycles] perf record -m 20M -e cycles --overwrite --switch-output -a
>
> Note the changed '-m 20M' option is in place.
>
> Signed-off-by: Jiri Olsa <jolsa@kernel.org>
> ---

  reply	other threads:[~2021-01-19  6:53 UTC|newest]

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-02 22:04 [PATCHv2 00/22] perf tools: Add daemon command Jiri Olsa
2021-01-02 22:04 ` [PATCH 01/22] perf tools: Make perf_config_from_file static Jiri Olsa
2021-01-18 15:51   ` Arnaldo Carvalho de Melo
2021-01-02 22:04 ` [PATCH 02/22] perf tools: Add config set interface Jiri Olsa
2021-01-18 15:53   ` Arnaldo Carvalho de Melo
2021-01-02 22:04 ` [PATCH 03/22] perf tools: Add debug_set_display_time function Jiri Olsa
2021-01-18 16:02   ` Arnaldo Carvalho de Melo
2021-01-19 14:59   ` Arnaldo Carvalho de Melo
2021-01-19 17:39     ` Jiri Olsa
2021-01-19 19:42       ` Arnaldo Carvalho de Melo
2021-01-02 22:04 ` [PATCH 04/22] perf tools: Add perf_home_perfconfig function Jiri Olsa
2021-01-18 16:05   ` Arnaldo Carvalho de Melo
2021-01-02 22:04 ` [PATCH 05/22] perf tools: Make perf_config_system global Jiri Olsa
2021-01-18 16:03   ` Arnaldo Carvalho de Melo
2021-01-02 22:04 ` [PATCH 06/22] perf tools: Make perf_config_global gobal Jiri Olsa
2021-01-18 16:05   ` Arnaldo Carvalho de Melo
2021-01-02 22:04 ` [PATCH 07/22] perf daemon: Add daemon command Jiri Olsa
2021-01-19  4:08   ` Namhyung Kim
2021-01-19 18:31     ` Jiri Olsa
2021-01-21  4:53       ` Namhyung Kim
2021-01-27  7:09   ` Namhyung Kim
2021-01-27 22:01     ` Jiri Olsa
2021-01-02 22:04 ` [PATCH 08/22] perf daemon: Add config file change check Jiri Olsa
2021-01-19  5:31   ` Namhyung Kim [this message]
2021-01-19 17:49     ` Jiri Olsa
2021-01-21  4:54       ` Namhyung Kim
2021-01-02 22:04 ` [PATCH 09/22] perf daemon: Add signalfd support Jiri Olsa
2021-01-02 22:04 ` [PATCH 10/22] perf daemon: Add signal command Jiri Olsa
2021-01-02 22:04 ` [PATCH 11/22] perf daemon: Add stop command Jiri Olsa
2021-01-19  5:35   ` Namhyung Kim
2021-01-02 22:04 ` [PATCH 12/22] perf daemon: Allow only one daemon over base directory Jiri Olsa
2021-01-19  5:37   ` Namhyung Kim
2021-01-19 17:44     ` Jiri Olsa
2021-01-02 22:04 ` [PATCH 13/22] perf daemon: Set control fifo for session Jiri Olsa
2021-01-02 22:04 ` [PATCH 14/22] perf daemon: Add ping command Jiri Olsa
2021-01-02 22:04 ` [PATCH 15/22] perf daemon: Use control to stop session Jiri Olsa
2021-01-02 22:04 ` [PATCH 16/22] perf daemon: Add up time for daemon/session list Jiri Olsa
2021-01-02 22:04 ` [PATCH 17/22] perf daemon: Add man page for perf-daemon Jiri Olsa
2021-01-02 22:04 ` [PATCH 18/22] perf test: Add daemon list command test Jiri Olsa
2021-01-02 22:04 ` [PATCH 19/22] perf test: Add daemon reconfig test Jiri Olsa
2021-01-02 22:04 ` [PATCH 20/22] perf test: Add daemon stop command test Jiri Olsa
2021-01-02 22:04 ` [PATCH 21/22] perf test: Add daemon signal " Jiri Olsa
2021-01-02 22:04 ` [PATCH 22/22] perf test: Add daemon ping " Jiri Olsa
2021-01-18 12:55 ` [PATCHv2 00/22] perf tools: Add daemon command Jiri Olsa

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