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Message-ID: <20210118125527.GA1645107@krava>
Date: Mon, 18 Jan 2021 13:55:27 +0100
From: Jiri Olsa <jolsa@...hat.com>
To: Jiri Olsa <jolsa@...nel.org>
Cc: Arnaldo Carvalho de Melo <acme@...nel.org>,
lkml <linux-kernel@...r.kernel.org>,
Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Ingo Molnar <mingo@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Namhyung Kim <namhyung@...nel.org>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Michael Petlan <mpetlan@...hat.com>,
Ian Rogers <irogers@...gle.com>,
Stephane Eranian <eranian@...gle.com>,
Alexei Budankov <abudankov@...wei.com>
Subject: Re: [PATCHv2 00/22] perf tools: Add daemon command
ping, any reviews?
thanks,
jirka
On Sat, Jan 02, 2021 at 11:04:19PM +0100, Jiri Olsa wrote:
> hi,
> we were asked for possibility to be able run record
> sessions on background.
>
> This patchset adds support to configure and run record
> sessions on background via new 'perf daemon' command.
>
> Please check below the example on usage.
>
> The patchset is based on following control changes:
> https://lore.kernel.org/lkml/20201226232038.390883-1-jolsa@kernel.org/
>
> Available also here:
> git://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git
> perf/daemon
>
> v2 changes:
> - switch options to sub-commands [Namhyung]
> - use signalfd to track on sessions [Alexei]
> - use stop command to stop sessions [Alexei]
> - couple minor fixes [Alexei]
> - more detailed changelogs [Arnaldo]
> - added tests
>
> thanks,
> jirka
>
>
> ---
> Jiri Olsa (22):
> perf tools: Make perf_config_from_file static
> perf tools: Add config set interface
> perf tools: Add debug_set_display_time function
> perf tools: Add perf_home_perfconfig function
> perf tools: Make perf_config_system global
> perf tools: Make perf_config_global gobal
> perf daemon: Add daemon command
> perf daemon: Add config file change check
> perf daemon: Add signalfd support
> perf daemon: Add signal command
> perf daemon: Add stop command
> perf daemon: Allow only one daemon over base directory
> perf daemon: Set control fifo for session
> perf daemon: Add ping command
> perf daemon: Use control to stop session
> perf daemon: Add up time for daemon/session list
> perf daemon: Add man page for perf-daemon
> perf test: Add daemon list command test
> perf test: Add daemon reconfig test
> perf test: Add daemon stop command test
> perf test: Add daemon signal command test
> perf test: Add daemon ping command test
>
> tools/perf/Build | 1 +
> tools/perf/Documentation/perf-config.txt | 14 ++
> tools/perf/Documentation/perf-daemon.txt | 187 ++++++++++++++++
> tools/perf/builtin-daemon.c | 1327 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> tools/perf/builtin.h | 1 +
> tools/perf/command-list.txt | 1 +
> tools/perf/perf.c | 1 +
> tools/perf/tests/shell/daemon.sh | 388 ++++++++++++++++++++++++++++++++
> tools/perf/util/config.c | 123 +++++++----
> tools/perf/util/config.h | 7 +-
> tools/perf/util/debug.c | 34 ++-
> tools/perf/util/debug.h | 1 +
> 12 files changed, 2037 insertions(+), 48 deletions(-)
> create mode 100644 tools/perf/Documentation/perf-daemon.txt
> create mode 100644 tools/perf/builtin-daemon.c
> create mode 100755 tools/perf/tests/shell/daemon.sh
>
>
> ---
> Example with 2 record sessions:
>
> # cat ~/.perfconfig
> [daemon]
> base=/opt/perfdata
>
> [session-cycles]
> run = -m 10M -e cycles --overwrite --switch-output -a
>
> [session-sched]
> run = -m 20M -e sched:* --overwrite --switch-output -a
>
>
> Starting the daemon:
>
> # perf daemon start
>
>
> Check sessions:
>
> # perf daemon
> [603349:daemon] base: /opt/perfdata
> [603350:cycles] perf record -m 10M -e cycles --overwrite --switch-output -a
> [603351:sched] perf record -m 20M -e sched:* --overwrite --switch-output -a
>
> First line is daemon process info with configured daemon base.
>
>
> Check sessions with more info:
>
> # perf daemon -v
> [603349:daemon] base: /opt/perfdata
> output: /opt/perfdata/output
> lock: /opt/perfdata/lock
> up: 1 minutes
> [603350:cycles] perf record -m 10M -e cycles --overwrite --switch-output -a
> base: /opt/perfdata/session-cycles
> output: /opt/perfdata/session-cycles/output
> control: /opt/perfdata/session-cycles/control
> ack: /opt/perfdata/session-cycles/ack
> up: 1 minutes
> [603351:sched] perf record -m 20M -e sched:* --overwrite --switch-output -a
> base: /opt/perfdata/session-sched
> output: /opt/perfdata/session-sched/output
> control: /opt/perfdata/session-sched/control
> ack: /opt/perfdata/session-sched/ack
> up: 1 minutes
>
> The 'base' path is daemon/session base.
> The 'lock' file is daemon's lock file guarding that no other
> daemon is running on top of the base.
> The 'output' file is perf record output for specific session.
> The 'control' and 'ack' files are perf control files.
> The 'up' number shows minutes daemon/session is running.
>
>
> Make sure control session is online:
>
> # perf daemon ping
> OK cycles
> OK sched
>
>
> Send USR2 signal to session 'cycles' to generate perf.data file:
>
> # perf daemon signal --session cycles
> signal 12 sent to session 'cycles [603452]'
>
> # tail -2 /opt/perfdata/session-cycles/output
> [ perf record: dump data: Woken up 1 times ]
> [ perf record: Dump perf.data.2020123017013149 ]
>
>
> Send USR2 signal to all sessions:
>
> # perf daemon signal
> signal 12 sent to session 'cycles [603452]'
> signal 12 sent to session 'sched [603453]'
>
> # tail -2 /opt/perfdata/session-cycles/output
> [ perf record: dump data: Woken up 1 times ]
> [ perf record: Dump perf.data.2020123017024689 ]
> # tail -2 /opt/perfdata/session-sched/output
> [ perf record: dump data: Woken up 1 times ]
> [ perf record: Dump perf.data.2020123017024713 ]
>
>
> Stop daemon:
>
> # perf daemon stop
>
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