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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/tools/perf/Documentation/perf-bench.txt
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perf-bench(1)

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

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NAME

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----

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perf-bench - General framework for benchmark suites

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SYNOPSIS

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--------

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[verse]

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'perf bench' [<common options>] <subsystem> <suite> [<options>]

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DESCRIPTION

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-----------

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This 'perf bench' command is general framework for benchmark suites.

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COMMON OPTIONS

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--------------

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-f::

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--format=::

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Specify format style.

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Current available format styles are:

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'default'::

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Default style. This is mainly for human reading.

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---------------------

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% perf bench sched pipe                      # with no style specified

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(executing 1000000 pipe operations between two tasks)

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        Total time:5.855 sec

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                5.855061 usecs/op

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		170792 ops/sec

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---------------------

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'simple'::

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This simple style is friendly for automated

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processing by scripts.

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---------------------

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% perf bench --format=simple sched pipe      # specified simple

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5.988

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---------------------

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SUBSYSTEM

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---------

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'sched'::

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	Scheduler and IPC mechanisms.

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SUITES FOR 'sched'

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~~~~~~~~~~~~~~~~~~

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*messaging*::

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Suite for evaluating performance of scheduler and IPC mechanisms.

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Based on hackbench by Rusty Russell.

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Options of *pipe*

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^^^^^^^^^^^^^^^^^

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-p::

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--pipe::

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Use pipe() instead of socketpair()

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-t::

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--thread::

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Be multi thread instead of multi process

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-g::

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--group=::

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Specify number of groups

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-l::

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--loop=::

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Specify number of loops

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Example of *messaging*

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^^^^^^^^^^^^^^^^^^^^^^

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---------------------

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% perf bench sched messaging                 # run with default

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options (20 sender and receiver processes per group)

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(10 groups == 400 processes run)

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      Total time:0.308 sec

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% perf bench sched messaging -t -g 20        # be multi-thread, with 20 groups

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(20 sender and receiver threads per group)

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(20 groups == 800 threads run)

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      Total time:0.582 sec

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---------------------

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*pipe*::

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Suite for pipe() system call.

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Based on pipe-test-1m.c by Ingo Molnar.

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Options of *pipe*

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^^^^^^^^^^^^^^^^^

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-l::

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--loop=::

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Specify number of loops.

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Example of *pipe*

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^^^^^^^^^^^^^^^^^

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---------------------

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% perf bench sched pipe

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(executing 1000000 pipe operations between two tasks)

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        Total time:8.091 sec

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                8.091833 usecs/op

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                123581 ops/sec

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% perf bench sched pipe -l 1000              # loop 1000

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(executing 1000 pipe operations between two tasks)

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        Total time:0.016 sec

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                16.948000 usecs/op

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                59004 ops/sec

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---------------------

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SEE ALSO

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--------

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linkperf:perf[1]

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