perf bench: Documentation update
The current perf-bench documentation has a couple of typos and even lacks entire description of mem subsystem. Fix it. Reported-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp> Cc: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp> Cc: Ingo Molnar <mingo@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1340172486-17805-1-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>hifive-unleashed-5.1
Namhyung Kim
Arnaldo Carvalho de Melo
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209bd9e3e1
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08942f6d5d
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@ -12,7 +12,7 @@ SYNOPSIS
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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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This 'perf bench' command is a general framework for benchmark suites.
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COMMON OPTIONS
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--------------
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@ -45,14 +45,20 @@ SUBSYSTEM
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'sched'::
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Scheduler and IPC mechanisms.
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'mem'::
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Memory access performance.
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'all'::
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All benchmark subsystems.
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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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Options of *messaging*
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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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@ -115,6 +121,72 @@ Example of *pipe*
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59004 ops/sec
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---------------------
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SUITES FOR 'mem'
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~~~~~~~~~~~~~~~~
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*memcpy*::
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Suite for evaluating performance of simple memory copy in various ways.
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Options of *memcpy*
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^^^^^^^^^^^^^^^^^^^
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-l::
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--length::
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Specify length of memory to copy (default: 1MB).
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Available units are B, KB, MB, GB and TB (case insensitive).
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-r::
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--routine::
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Specify routine to copy (default: default).
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Available routines are depend on the architecture.
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On x86-64, x86-64-unrolled, x86-64-movsq and x86-64-movsb are supported.
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-i::
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--iterations::
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Repeat memcpy invocation this number of times.
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-c::
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--clock::
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Use perf's cpu-cycles event instead of gettimeofday syscall.
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-o::
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--only-prefault::
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Show only the result with page faults before memcpy.
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-n::
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--no-prefault::
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Show only the result without page faults before memcpy.
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*memset*::
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Suite for evaluating performance of simple memory set in various ways.
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Options of *memset*
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^^^^^^^^^^^^^^^^^^^
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-l::
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--length::
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Specify length of memory to set (default: 1MB).
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Available units are B, KB, MB, GB and TB (case insensitive).
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-r::
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--routine::
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Specify routine to set (default: default).
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Available routines are depend on the architecture.
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On x86-64, x86-64-unrolled, x86-64-stosq and x86-64-stosb are supported.
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-i::
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--iterations::
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Repeat memset invocation this number of times.
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-c::
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--clock::
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Use perf's cpu-cycles event instead of gettimeofday syscall.
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-o::
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--only-prefault::
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Show only the result with page faults before memset.
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-n::
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--no-prefault::
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Show only the result without page faults before memset.
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SEE ALSO
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--------
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linkperf:perf[1]
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@ -32,13 +32,13 @@ static bool no_prefault;
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static const struct option options[] = {
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OPT_STRING('l', "length", &length_str, "1MB",
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"Specify length of memory to copy. "
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"available unit: B, MB, GB (upper and lower)"),
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"Available units: B, KB, MB, GB and TB (upper and lower)"),
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OPT_STRING('r', "routine", &routine, "default",
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"Specify routine to copy"),
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OPT_INTEGER('i', "iterations", &iterations,
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"repeat memcpy() invocation this number of times"),
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OPT_BOOLEAN('c', "clock", &use_clock,
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"Use CPU clock for measuring"),
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"Use cycles event instead of gettimeofday() for measuring"),
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OPT_BOOLEAN('o', "only-prefault", &only_prefault,
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"Show only the result with page faults before memcpy()"),
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OPT_BOOLEAN('n', "no-prefault", &no_prefault,
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@ -31,14 +31,14 @@ static bool no_prefault;
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static const struct option options[] = {
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OPT_STRING('l', "length", &length_str, "1MB",
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"Specify length of memory to copy. "
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"available unit: B, MB, GB (upper and lower)"),
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"Specify length of memory to set. "
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"Available units: B, KB, MB, GB and TB (upper and lower)"),
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OPT_STRING('r', "routine", &routine, "default",
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"Specify routine to copy"),
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"Specify routine to set"),
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OPT_INTEGER('i', "iterations", &iterations,
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"repeat memset() invocation this number of times"),
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OPT_BOOLEAN('c', "clock", &use_clock,
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"Use CPU clock for measuring"),
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"Use cycles event instead of gettimeofday() for measuring"),
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OPT_BOOLEAN('o', "only-prefault", &only_prefault,
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"Show only the result with page faults before memset()"),
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OPT_BOOLEAN('n', "no-prefault", &no_prefault,
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@ -33,7 +33,7 @@ struct bench_suite {
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};
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\
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/* sentinel: easy for help */
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#define suite_all { "all", "test all suite (pseudo suite)", NULL }
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#define suite_all { "all", "Test all benchmark suites", NULL }
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static struct bench_suite sched_suites[] = {
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{ "messaging",
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@ -75,7 +75,7 @@ static struct bench_subsys subsystems[] = {
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"memory access performance",
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mem_suites },
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{ "all", /* sentinel: easy for help */
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"test all subsystem (pseudo subsystem)",
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"all benchmark subsystem",
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NULL },
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{ NULL,
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NULL,
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