path: root/tools/perf/Documentation/perf-trace.txt

perf-trace(1)
=============

NAME
----
perf-trace - strace inspired tool

SYNOPSIS
--------
[verse]
'perf trace'

DESCRIPTION
-----------
This command will show the events associated with the target, initially
syscalls, but other system events like pagefaults, task lifetime events,
scheduling events, etc.

Initially this is a live mode only tool, but eventually will work with
perf.data files like the other tools, allowing a detached 'record' from
analysis phases.

OPTIONS
-------

-a::
--all-cpus::
        System-wide collection from all CPUs.

-e::
--expr::
	List of events to show, currently only syscall names.

-o::
--output=::
	Output file name.

-p::
--pid=::
	Record events on existing process ID (comma separated list).

-t::
--tid=::
        Record events on existing thread ID (comma separated list).

-u::
--uid=::
        Record events in threads owned by uid. Name or number.

-i::
--no-inherit::
	Child tasks do not inherit counters.

-m::
--mmap-pages=::
	Number of mmap data pages. Must be a power of two.

-C::
--cpu::
Collect samples only on the list of CPUs provided. Multiple CPUs can be provided as a
comma-separated list with no space: 0,1. Ranges of CPUs are specified with -: 0-2.
In per-thread mode with inheritance mode on (default), Events are captured only when
the thread executes on the designated CPUs. Default is to monitor all CPUs.

--duration:
	Show only events that had a duration greater than N.M ms.

--sched:
	Accrue thread runtime and provide a summary at the end of the session.

SEE ALSO
--------
linkperf:perf-record[1], linkperf:perf-script[1]