2021-02-08 20:08:45 +00:00
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perf-daemon(1)
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==============
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NAME
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----
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perf-daemon - Run record sessions on background
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SYNOPSIS
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--------
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[verse]
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'perf daemon'
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'perf daemon' [<options>]
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'perf daemon start' [<options>]
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2021-02-08 20:08:55 +00:00
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'perf daemon signal' [<options>]
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2021-02-08 20:08:45 +00:00
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DESCRIPTION
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-----------
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This command allows to run simple daemon process that starts and
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monitors configured record sessions.
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2021-02-08 20:08:50 +00:00
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You can imagine 'perf daemon' of background process with several
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'perf record' child tasks, like:
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# ps axjf
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...
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1 916507 ... perf daemon start
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916507 916508 ... \_ perf record --control=fifo:control,ack -m 10M -e cycles --overwrite --switch-output -a
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916507 916509 ... \_ perf record --control=fifo:control,ack -m 20M -e sched:* --overwrite --switch-output -a
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Not every 'perf record' session is suitable for running under daemon.
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User need perf session that either produces data on query, like the
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flight recorder sessions in above example or session that is configured
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to produce data periodically, like with --switch-output configuration
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for time and size.
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2021-02-08 20:08:45 +00:00
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OPTIONS
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-------
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-v::
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--verbose::
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Be more verbose.
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2021-02-08 20:08:46 +00:00
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--config=<PATH>::
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Config file path. If not provided, perf will check system and default
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locations (/etc/perfconfig, $HOME/.perfconfig).
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2021-02-08 20:08:47 +00:00
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--base=<PATH>::
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Base directory path. Each daemon instance is running on top
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of base directory.
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2021-02-08 20:08:45 +00:00
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All generic options are available also under commands.
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START COMMAND
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-------------
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The start command creates the daemon process.
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2021-02-08 20:08:52 +00:00
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-f::
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--foreground::
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Do not put the process in background.
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2021-02-08 20:08:45 +00:00
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2021-02-08 20:08:55 +00:00
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SIGNAL COMMAND
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--------------
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The signal command sends signal to configured sessions.
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--session::
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Send signal to specific session.
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2021-02-08 20:08:50 +00:00
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CONFIG FILE
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-----------
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The daemon is configured within standard perf config file by
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following new variables:
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daemon.base:
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Base path for daemon data. All sessions data are
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stored under this path.
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session-<NAME>.run:
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Defines new record session. The value is record's command
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line without the 'record' keyword.
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Each perf record session is run in daemon.base/<NAME> directory.
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2021-02-08 20:08:45 +00:00
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SEE ALSO
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--------
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linkperf:perf-record[1], linkperf:perf-config[1]
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