lkml.org 
[lkml]   [2021]   [Jan]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[PATCHv3 00/24] perf tools: Add daemon command
Date
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.

Available also here:
git://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git
perf/daemon

v3 changes:
- several patches merged
- add comments to daemon locking [Namhyung]
- split patch 1 to multiple patches [Namhyung]
- add missing allocation checks [Namhyung]
- add comments for session state transitions [Namhyung]
- add base directory check [Namhyung]
- use ',' as default for -x option [Namhyung]
- remove extra close before dup2 [Namhyung]
- add new reconfig test for empty config
- add --base option

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 (24):
perf daemon: Add daemon command
perf daemon: Add config option
perf daemon: Add base option
perf daemon: Add server socket support
perf daemon: Add client socket support
perf daemon: Add config file support
perf daemon: Add config file change check
perf daemon: Add background support
perf daemon: Add signalfd support
perf daemon: Add list command
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 tests: Add daemon list command test
perf tests: Add daemon reconfig test
perf tests: Add daemon stop command test
perf tests: Add daemon signal command test
perf tests: Add daemon ping command test
perf tests: Add daemon lock test

tools/perf/Build | 1 +
tools/perf/Documentation/perf-config.txt | 14 ++
tools/perf/Documentation/perf-daemon.txt | 187 +++++++++++++++++++++
tools/perf/builtin-daemon.c | 1448 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
tools/perf/builtin.h | 1 +
tools/perf/command-list.txt | 1 +
tools/perf/perf.c | 1 +
tools/perf/tests/shell/daemon.sh | 475 +++++++++++++++++++++++++++++++++++++++++++++++++++++
8 files changed, 2128 insertions(+)
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

\
 
 \ /
  Last update: 2021-01-31 00:52    [W:0.301 / U:5.408 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site