mirror of https://gitee.com/openkylin/linux.git
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>
This commit is contained in:
Namhyung Kim
Arnaldo Carvalho de Melo
parent
209bd9e3e1
commit
08942f6d5d
|
|
@ -12,7 +12,7 @@ SYNOPSIS
|
|||
|
||||
DESCRIPTION
|
||||
-----------
|
||||
This 'perf bench' command is general framework for benchmark suites.
|
||||
This 'perf bench' command is a general framework for benchmark suites.
|
||||
|
||||
COMMON OPTIONS
|
||||
--------------
|
||||
|
|
@ -45,14 +45,20 @@ SUBSYSTEM
|
|||
'sched'::
|
||||
Scheduler and IPC mechanisms.
|
||||
|
||||
'mem'::
|
||||
Memory access performance.
|
||||
|
||||
'all'::
|
||||
All benchmark subsystems.
|
||||
|
||||
SUITES FOR 'sched'
|
||||
~~~~~~~~~~~~~~~~~~
|
||||
*messaging*::
|
||||
Suite for evaluating performance of scheduler and IPC mechanisms.
|
||||
Based on hackbench by Rusty Russell.
|
||||
|
||||
Options of *pipe*
|
||||
^^^^^^^^^^^^^^^^^
|
||||
Options of *messaging*
|
||||
^^^^^^^^^^^^^^^^^^^^^^
|
||||
-p::
|
||||
--pipe::
|
||||
Use pipe() instead of socketpair()
|
||||
|
|
@ -115,6 +121,72 @@ Example of *pipe*
|
|||
59004 ops/sec
|
||||
---------------------
|
||||
|
||||
SUITES FOR 'mem'
|
||||
~~~~~~~~~~~~~~~~
|
||||
*memcpy*::
|
||||
Suite for evaluating performance of simple memory copy in various ways.
|
||||
|
||||
Options of *memcpy*
|
||||
^^^^^^^^^^^^^^^^^^^
|
||||
-l::
|
||||
--length::
|
||||
Specify length of memory to copy (default: 1MB).
|
||||
Available units are B, KB, MB, GB and TB (case insensitive).
|
||||
|
||||
-r::
|
||||
--routine::
|
||||
Specify routine to copy (default: default).
|
||||
Available routines are depend on the architecture.
|
||||
On x86-64, x86-64-unrolled, x86-64-movsq and x86-64-movsb are supported.
|
||||
|
||||
-i::
|
||||
--iterations::
|
||||
Repeat memcpy invocation this number of times.
|
||||
|
||||
-c::
|
||||
--clock::
|
||||
Use perf's cpu-cycles event instead of gettimeofday syscall.
|
||||
|
||||
-o::
|
||||
--only-prefault::
|
||||
Show only the result with page faults before memcpy.
|
||||
|
||||
-n::
|
||||
--no-prefault::
|
||||
Show only the result without page faults before memcpy.
|
||||
|
||||
*memset*::
|
||||
Suite for evaluating performance of simple memory set in various ways.
|
||||
|
||||
Options of *memset*
|
||||
^^^^^^^^^^^^^^^^^^^
|
||||
-l::
|
||||
--length::
|
||||
Specify length of memory to set (default: 1MB).
|
||||
Available units are B, KB, MB, GB and TB (case insensitive).
|
||||
|
||||
-r::
|
||||
--routine::
|
||||
Specify routine to set (default: default).
|
||||
Available routines are depend on the architecture.
|
||||
On x86-64, x86-64-unrolled, x86-64-stosq and x86-64-stosb are supported.
|
||||
|
||||
-i::
|
||||
--iterations::
|
||||
Repeat memset invocation this number of times.
|
||||
|
||||
-c::
|
||||
--clock::
|
||||
Use perf's cpu-cycles event instead of gettimeofday syscall.
|
||||
|
||||
-o::
|
||||
--only-prefault::
|
||||
Show only the result with page faults before memset.
|
||||
|
||||
-n::
|
||||
--no-prefault::
|
||||
Show only the result without page faults before memset.
|
||||
|
||||
SEE ALSO
|
||||
--------
|
||||
linkperf:perf[1]
|
||||
|
|
|
|||
|
|
@ -32,13 +32,13 @@ static bool no_prefault;
|
|||
static const struct option options[] = {
|
||||
OPT_STRING('l', "length", &length_str, "1MB",
|
||||
"Specify length of memory to copy. "
|
||||
"available unit: B, MB, GB (upper and lower)"),
|
||||
"Available units: B, KB, MB, GB and TB (upper and lower)"),
|
||||
OPT_STRING('r', "routine", &routine, "default",
|
||||
"Specify routine to copy"),
|
||||
OPT_INTEGER('i', "iterations", &iterations,
|
||||
"repeat memcpy() invocation this number of times"),
|
||||
OPT_BOOLEAN('c', "clock", &use_clock,
|
||||
"Use CPU clock for measuring"),
|
||||
"Use cycles event instead of gettimeofday() for measuring"),
|
||||
OPT_BOOLEAN('o', "only-prefault", &only_prefault,
|
||||
"Show only the result with page faults before memcpy()"),
|
||||
OPT_BOOLEAN('n', "no-prefault", &no_prefault,
|
||||
|
|
|
|||
|
|
@ -31,14 +31,14 @@ static bool no_prefault;
|
|||
|
||||
static const struct option options[] = {
|
||||
OPT_STRING('l', "length", &length_str, "1MB",
|
||||
"Specify length of memory to copy. "
|
||||
"available unit: B, MB, GB (upper and lower)"),
|
||||
"Specify length of memory to set. "
|
||||
"Available units: B, KB, MB, GB and TB (upper and lower)"),
|
||||
OPT_STRING('r', "routine", &routine, "default",
|
||||
"Specify routine to copy"),
|
||||
"Specify routine to set"),
|
||||
OPT_INTEGER('i', "iterations", &iterations,
|
||||
"repeat memset() invocation this number of times"),
|
||||
OPT_BOOLEAN('c', "clock", &use_clock,
|
||||
"Use CPU clock for measuring"),
|
||||
"Use cycles event instead of gettimeofday() for measuring"),
|
||||
OPT_BOOLEAN('o', "only-prefault", &only_prefault,
|
||||
"Show only the result with page faults before memset()"),
|
||||
OPT_BOOLEAN('n', "no-prefault", &no_prefault,
|
||||
|
|
|
|||
|
|
@ -33,7 +33,7 @@ struct bench_suite {
|
|||
};
|
||||
\
|
||||
/* sentinel: easy for help */
|
||||
#define suite_all { "all", "test all suite (pseudo suite)", NULL }
|
||||
#define suite_all { "all", "Test all benchmark suites", NULL }
|
||||
|
||||
static struct bench_suite sched_suites[] = {
|
||||
{ "messaging",
|
||||
|
|
@ -75,7 +75,7 @@ static struct bench_subsys subsystems[] = {
|
|||
"memory access performance",
|
||||
mem_suites },
|
||||
{ "all", /* sentinel: easy for help */
|
||||
"test all subsystem (pseudo subsystem)",
|
||||
"all benchmark subsystem",
|
||||
NULL },
|
||||
{ NULL,
|
||||
NULL,
|
||||
|
|
|
|||
Loading…
Reference in New Issue