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Commit 88fad559 authored by Neil Leeder's avatar Neil Leeder
Browse files

tools: perf: build in perf periodic 



Add perf periodic to the list of perf commands.
Get it to compile with latest kernel and add documentation.

Change-Id: Ie250697f36d1691596196119c1e0a76ada524dc8
Signed-off-by: default avatarNeil Leeder <nleeder@codeaurora.org>
parent 60e6ad84

tools/perf/Documentation/perf-periodic.txt

0 → 100644
+76 −0
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perf-periodic(1)

============



NAME

----

perf-periodic - Periodically print the performance counters at given rate



SYNOPSIS

--------

[verse]

'perf periodic' [-e <EVENT> | --event=EVENT] [-p pid] [<options>]



DESCRIPTION

-----------

This command gathers performance counter statistics and periodically prints

out the counter values.





OPTIONS

-------



-e::

--event=::

	Select the PMU event. Selection can be a symbolic event name

	(use 'perf list' to list all events) or a raw PMU

	event (eventsel+umask) in the form of rNNN where NNN is a

	 hexadecimal event descriptor.



-a::

--all-cpus::

        system-wide collection from all CPUs, overrides cpumask



-c cpumask::

Count only on the list of CPUs provided. Multiple CPUs can be provided as a

mask: 1 = cpu0, 3 = cpu0 and cpu1 etc. Default is to count on all CPUs.



-d::

Delta. Display results as a delta from the previous value. Default is to

show the total acculumated value.



-i iterations::

Number of times to iterate. Default 0-forever.



-m operations::

Perform math operations on results. m=multiply, d=divide, a=add, s=subtract,

z=zero, t=transfer, T=total.



-p::

--pid=<pid>::

        stat events on existing process id (comma separated list)



-r fifo_name::

Specify read FIFO name for commands, such as PID to pass pid to connect to.



-s delay::

Time to sleep between each sample, in milliseconds. Default 1000 (1 second).



-v::

Verbose. Show more information (counter open errors etc).



EXAMPLES

--------



$ perf periodic -d -e r3 -e r4 -i 3

 122640 2570103

 108397 2159418

 133372 2826949



$ perf periodic -d -e r3 -e r4 -i 3 -m td

0.032174

0.050263

0.031349



SEE ALSO

--------

linkperf:perf-stat[1]

tools/perf/builtin-periodic.c

+3 −3
Original line number Diff line number Diff line 
/*

 * Copyright (c) 2011-2012, The Linux Foundation. All rights reserved.

 * Copyright (c) 2011-2013, The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and
@@ -335,7 +335,7 @@ static void do_math_op(struct perf_setup_s *p) 
	}

}



int cmd_periodic(int argc, const char **argv, const char *prefix __used)

int cmd_periodic(int argc, const char **argv, const char *prefix __maybe_unused)

{

	int status = 0;

	int c, i;
@@ -344,7 +344,7 @@ int cmd_periodic(int argc, const char **argv, const char *prefix __used) 
	FILE *fp;

	int nr_counters = 0;



	evsel_list = perf_evlist__new(NULL, NULL);

	evsel_list = perf_evlist__new();

	if (evsel_list == NULL)

		return -ENOMEM;

tools/perf/command-list.txt

+1 −0
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@@ -15,6 +15,7 @@ perf-kvm mainporcelain common 
perf-list			mainporcelain common

perf-lock			mainporcelain common

perf-mem			mainporcelain common

perf-periodic			mainporcelain common

perf-probe			mainporcelain full

perf-record			mainporcelain common

perf-report			mainporcelain common