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1perf-bench(1)
2=============
3
4NAME
5----
6perf-bench - General framework for benchmark suites
7
8SYNOPSIS
9--------
10[verse]
11'perf bench' [<common options>] <subsystem> <suite> [<options>]
12
13DESCRIPTION
14-----------
15This 'perf bench' command is a general framework for benchmark suites.
16
17COMMON OPTIONS
18--------------
19-r::
20--repeat=::
21Specify amount of times to repeat the run (default 10).
22
23-f::
24--format=::
25Specify format style.
26Current available format styles are:
27
28'default'::
29Default style. This is mainly for human reading.
30---------------------
31% perf bench sched pipe # with no style specified
32(executing 1000000 pipe operations between two tasks)
33 Total time:5.855 sec
34 5.855061 usecs/op
35 170792 ops/sec
36---------------------
37
38'simple'::
39This simple style is friendly for automated
40processing by scripts.
41---------------------
42% perf bench --format=simple sched pipe # specified simple
435.988
44---------------------
45
46SUBSYSTEM
47---------
48
49'sched'::
50 Scheduler and IPC mechanisms.
51
52'syscall'::
53 System call performance (throughput).
54
55'mem'::
56 Memory access performance.
57
58'numa'::
59 NUMA scheduling and MM benchmarks.
60
61'futex'::
62 Futex stressing benchmarks.
63
64'epoll'::
65 Eventpoll (epoll) stressing benchmarks.
66
67'internals'::
68 Benchmark internal perf functionality.
69
70'all'::
71 All benchmark subsystems.
72
73SUITES FOR 'sched'
74~~~~~~~~~~~~~~~~~~
75*messaging*::
76Suite for evaluating performance of scheduler and IPC mechanisms.
77Based on hackbench by Rusty Russell.
78
79Options of *messaging*
80^^^^^^^^^^^^^^^^^^^^^^
81-p::
82--pipe::
83Use pipe() instead of socketpair()
84
85-t::
86--thread::
87Be multi thread instead of multi process
88
89-g::
90--group=::
91Specify number of groups
92
93-l::
94--nr_loops=::
95Specify number of loops
96
97Example of *messaging*
98^^^^^^^^^^^^^^^^^^^^^^
99
100---------------------
101% perf bench sched messaging # run with default
102options (20 sender and receiver processes per group)
103(10 groups == 400 processes run)
104
105 Total time:0.308 sec
106
107% perf bench sched messaging -t -g 20 # be multi-thread, with 20 groups
108(20 sender and receiver threads per group)
109(20 groups == 800 threads run)
110
111 Total time:0.582 sec
112---------------------
113
114*pipe*::
115Suite for pipe() system call.
116Based on pipe-test-1m.c by Ingo Molnar.
117
118Options of *pipe*
119^^^^^^^^^^^^^^^^^
120-l::
121--loop=::
122Specify number of loops.
123
124Example of *pipe*
125^^^^^^^^^^^^^^^^^
126
127---------------------
128% perf bench sched pipe
129(executing 1000000 pipe operations between two tasks)
130
131 Total time:8.091 sec
132 8.091833 usecs/op
133 123581 ops/sec
134
135% perf bench sched pipe -l 1000 # loop 1000
136(executing 1000 pipe operations between two tasks)
137
138 Total time:0.016 sec
139 16.948000 usecs/op
140 59004 ops/sec
141---------------------
142
143SUITES FOR 'syscall'
144~~~~~~~~~~~~~~~~~~
145*basic*::
146Suite for evaluating performance of core system call throughput (both usecs/op and ops/sec metrics).
147This uses a single thread simply doing getppid(2), which is a simple syscall where the result is not
148cached by glibc.
149
150
151SUITES FOR 'mem'
152~~~~~~~~~~~~~~~~
153*memcpy*::
154Suite for evaluating performance of simple memory copy in various ways.
155
156Options of *memcpy*
157^^^^^^^^^^^^^^^^^^^
158-l::
159--size::
160Specify size of memory to copy (default: 1MB).
161Available units are B, KB, MB, GB and TB (case insensitive).
162
163-f::
164--function::
165Specify function to copy (default: default).
166Available functions are depend on the architecture.
167On x86-64, x86-64-unrolled, x86-64-movsq and x86-64-movsb are supported.
168
169-l::
170--nr_loops::
171Repeat memcpy invocation this number of times.
172
173-c::
174--cycles::
175Use perf's cpu-cycles event instead of gettimeofday syscall.
176
177*memset*::
178Suite for evaluating performance of simple memory set in various ways.
179
180Options of *memset*
181^^^^^^^^^^^^^^^^^^^
182-l::
183--size::
184Specify size of memory to set (default: 1MB).
185Available units are B, KB, MB, GB and TB (case insensitive).
186
187-f::
188--function::
189Specify function to set (default: default).
190Available functions are depend on the architecture.
191On x86-64, x86-64-unrolled, x86-64-stosq and x86-64-stosb are supported.
192
193-l::
194--nr_loops::
195Repeat memset invocation this number of times.
196
197-c::
198--cycles::
199Use perf's cpu-cycles event instead of gettimeofday syscall.
200
201SUITES FOR 'numa'
202~~~~~~~~~~~~~~~~~
203*mem*::
204Suite for evaluating NUMA workloads.
205
206SUITES FOR 'futex'
207~~~~~~~~~~~~~~~~~~
208*hash*::
209Suite for evaluating hash tables.
210
211*wake*::
212Suite for evaluating wake calls.
213
214*wake-parallel*::
215Suite for evaluating parallel wake calls.
216
217*requeue*::
218Suite for evaluating requeue calls.
219
220*lock-pi*::
221Suite for evaluating futex lock_pi calls.
222
223SUITES FOR 'epoll'
224~~~~~~~~~~~~~~~~~~
225*wait*::
226Suite for evaluating concurrent epoll_wait calls.
227
228*ctl*::
229Suite for evaluating multiple epoll_ctl calls.
230
231SUITES FOR 'internals'
232~~~~~~~~~~~~~~~~~~~~~~
233*synthesize*::
234Suite for evaluating perf's event synthesis performance.
235
236SEE ALSO
237--------
238linkperf:perf[1]
1perf-bench(1)
2=============
3
4NAME
5----
6perf-bench - General framework for benchmark suites
7
8SYNOPSIS
9--------
10[verse]
11'perf bench' [<common options>] <subsystem> <suite> [<options>]
12
13DESCRIPTION
14-----------
15This 'perf bench' command is a general framework for benchmark suites.
16
17COMMON OPTIONS
18--------------
19-r::
20--repeat=::
21Specify amount of times to repeat the run (default 10).
22
23-f::
24--format=::
25Specify format style.
26Current available format styles are:
27
28'default'::
29Default style. This is mainly for human reading.
30---------------------
31% perf bench sched pipe # with no style specified
32(executing 1000000 pipe operations between two tasks)
33 Total time:5.855 sec
34 5.855061 usecs/op
35 170792 ops/sec
36---------------------
37
38'simple'::
39This simple style is friendly for automated
40processing by scripts.
41---------------------
42% perf bench --format=simple sched pipe # specified simple
435.988
44---------------------
45
46SUBSYSTEM
47---------
48
49'sched'::
50 Scheduler and IPC mechanisms.
51
52'mem'::
53 Memory access performance.
54
55'numa'::
56 NUMA scheduling and MM benchmarks.
57
58'futex'::
59 Futex stressing benchmarks.
60
61'epoll'::
62 Eventpoll (epoll) stressing benchmarks.
63
64'all'::
65 All benchmark subsystems.
66
67SUITES FOR 'sched'
68~~~~~~~~~~~~~~~~~~
69*messaging*::
70Suite for evaluating performance of scheduler and IPC mechanisms.
71Based on hackbench by Rusty Russell.
72
73Options of *messaging*
74^^^^^^^^^^^^^^^^^^^^^^
75-p::
76--pipe::
77Use pipe() instead of socketpair()
78
79-t::
80--thread::
81Be multi thread instead of multi process
82
83-g::
84--group=::
85Specify number of groups
86
87-l::
88--nr_loops=::
89Specify number of loops
90
91Example of *messaging*
92^^^^^^^^^^^^^^^^^^^^^^
93
94---------------------
95% perf bench sched messaging # run with default
96options (20 sender and receiver processes per group)
97(10 groups == 400 processes run)
98
99 Total time:0.308 sec
100
101% perf bench sched messaging -t -g 20 # be multi-thread, with 20 groups
102(20 sender and receiver threads per group)
103(20 groups == 800 threads run)
104
105 Total time:0.582 sec
106---------------------
107
108*pipe*::
109Suite for pipe() system call.
110Based on pipe-test-1m.c by Ingo Molnar.
111
112Options of *pipe*
113^^^^^^^^^^^^^^^^^
114-l::
115--loop=::
116Specify number of loops.
117
118Example of *pipe*
119^^^^^^^^^^^^^^^^^
120
121---------------------
122% perf bench sched pipe
123(executing 1000000 pipe operations between two tasks)
124
125 Total time:8.091 sec
126 8.091833 usecs/op
127 123581 ops/sec
128
129% perf bench sched pipe -l 1000 # loop 1000
130(executing 1000 pipe operations between two tasks)
131
132 Total time:0.016 sec
133 16.948000 usecs/op
134 59004 ops/sec
135---------------------
136
137SUITES FOR 'mem'
138~~~~~~~~~~~~~~~~
139*memcpy*::
140Suite for evaluating performance of simple memory copy in various ways.
141
142Options of *memcpy*
143^^^^^^^^^^^^^^^^^^^
144-l::
145--size::
146Specify size of memory to copy (default: 1MB).
147Available units are B, KB, MB, GB and TB (case insensitive).
148
149-f::
150--function::
151Specify function to copy (default: default).
152Available functions are depend on the architecture.
153On x86-64, x86-64-unrolled, x86-64-movsq and x86-64-movsb are supported.
154
155-l::
156--nr_loops::
157Repeat memcpy invocation this number of times.
158
159-c::
160--cycles::
161Use perf's cpu-cycles event instead of gettimeofday syscall.
162
163*memset*::
164Suite for evaluating performance of simple memory set in various ways.
165
166Options of *memset*
167^^^^^^^^^^^^^^^^^^^
168-l::
169--size::
170Specify size of memory to set (default: 1MB).
171Available units are B, KB, MB, GB and TB (case insensitive).
172
173-f::
174--function::
175Specify function to set (default: default).
176Available functions are depend on the architecture.
177On x86-64, x86-64-unrolled, x86-64-stosq and x86-64-stosb are supported.
178
179-l::
180--nr_loops::
181Repeat memset invocation this number of times.
182
183-c::
184--cycles::
185Use perf's cpu-cycles event instead of gettimeofday syscall.
186
187SUITES FOR 'numa'
188~~~~~~~~~~~~~~~~~
189*mem*::
190Suite for evaluating NUMA workloads.
191
192SUITES FOR 'futex'
193~~~~~~~~~~~~~~~~~~
194*hash*::
195Suite for evaluating hash tables.
196
197*wake*::
198Suite for evaluating wake calls.
199
200*wake-parallel*::
201Suite for evaluating parallel wake calls.
202
203*requeue*::
204Suite for evaluating requeue calls.
205
206*lock-pi*::
207Suite for evaluating futex lock_pi calls.
208
209SUITES FOR 'epoll'
210~~~~~~~~~~~~~~~~~~
211*wait*::
212Suite for evaluating concurrent epoll_wait calls.
213
214*ctl*::
215Suite for evaluating multiple epoll_ctl calls.
216
217SEE ALSO
218--------
219linkperf:perf[1]