2012-09-27 07:05:56 +08:00
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perf-trace(1)
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=============
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NAME
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----
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perf-trace - strace inspired tool
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SYNOPSIS
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--------
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[verse]
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'perf trace'
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DESCRIPTION
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-----------
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This command will show the events associated with the target, initially
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syscalls, but other system events like pagefaults, task lifetime events,
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scheduling events, etc.
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Initially this is a live mode only tool, but eventually will work with
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perf.data files like the other tools, allowing a detached 'record' from
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analysis phases.
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OPTIONS
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-------
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--all-cpus::
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System-wide collection from all CPUs.
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-p::
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--pid=::
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Record events on existing process ID (comma separated list).
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--tid=::
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Record events on existing thread ID (comma separated list).
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--uid=::
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Record events in threads owned by uid. Name or number.
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--no-inherit::
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Child tasks do not inherit counters.
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--mmap-pages=::
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Number of mmap data pages. Must be a power of two.
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--cpu::
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Collect samples only on the list of CPUs provided. Multiple CPUs can be provided as a
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comma-separated list with no space: 0,1. Ranges of CPUs are specified with -: 0-2.
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In per-thread mode with inheritance mode on (default), Events are captured only when
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the thread executes on the designated CPUs. Default is to monitor all CPUs.
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perf trace: Add duration filter
Example:
[acme@sandy linux]$ perf trace --duration 0.025 usleep 1
2.221 ( 0.958 ms): 6724 execve(arg0: 140733557168278, arg1: 140733557178768, arg2: 16134304, arg3: 140733557167840, arg4: 7955998171588342573, arg5: 6723) = -2
3.690 ( 1.443 ms): 6724 execve(arg0: 140733557168295, arg1: 140733557178768, arg2: 16134304, arg3: 140733557167840, arg4: 7955998171588342573, arg5: 6723) = 0
3.979 ( 0.048 ms): 6724 open(filename: 208733843841, flags: 0, mode: 1 ) = 3
4.071 ( 0.075 ms): 6724 open(filename: 139744419925673, flags: 0, mode: 0 ) = 3
4.318 ( 0.056 ms): 6724 nanosleep(rqtp: 140734030404608, rmtp: 0 ) = 0
[acme@sandy linux]$ perf trace --duration 0.100 usleep 1
1.143 ( 1.021 ms): 6726 execve(arg0: 140736323962279, arg1: 140736323972752, arg2: 34926752, arg3: 140736323961824, arg4: 7955998171588342573, arg5: 6725) = 0
[acme@sandy linux]$
Cherry picked from tmp.perf/trace2 branch.
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/n/tip-oslw2j2958we9qf0ctra4whd@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2012-10-08 20:56:00 +08:00
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--duration:
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Show only events that had a duration greater than N.M ms.
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2012-10-18 04:13:12 +08:00
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--sched:
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Accrue thread runtime and provide a summary at the end of the session.
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2012-09-27 07:05:56 +08:00
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SEE ALSO
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--------
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linkperf:perf-record[1], linkperf:perf-script[1]
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