1PERF-BENCH(1)                     perf Manual                    PERF-BENCH(1)
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NAME

6       perf-bench - General framework for benchmark suites
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SYNOPSIS

9       perf bench [<common options>] <subsystem> <suite> [<options>]
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DESCRIPTION

12       This perf bench command is a general framework for benchmark suites.
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COMMON OPTIONS

15       -r, --repeat=
16           Specify amount of times to repeat the run (default 10).
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18       -f, --format=
19           Specify format style. Current available format styles are:
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21       default
22           Default style. This is mainly for human reading.
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24
25           .ft C
26           % perf bench sched pipe                      # with no style specified
27           (executing 1000000 pipe operations between two tasks)
28                   Total time:5.855 sec
29                           5.855061 usecs/op
30                           170792 ops/sec
31           .ft
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34       simple
35           This simple style is friendly for automated processing by scripts.
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37
38           .ft C
39           % perf bench --format=simple sched pipe      # specified simple
40           5.988
41           .ft
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SUBSYSTEM

45       sched
46           Scheduler and IPC mechanisms.
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48       syscall
49           System call performance (throughput).
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51       mem
52           Memory access performance.
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54       numa
55           NUMA scheduling and MM benchmarks.
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57       futex
58           Futex stressing benchmarks.
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60       epoll
61           Eventpoll (epoll) stressing benchmarks.
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63       internals
64           Benchmark internal perf functionality.
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66       all
67           All benchmark subsystems.
68
69   SUITES FOR sched
70       messaging
71           Suite for evaluating performance of scheduler and IPC mechanisms.
72           Based on hackbench by Rusty Russell.
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74       Options of messaging
75           -p, --pipe
76               Use pipe() instead of socketpair()
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78           -t, --thread
79               Be multi thread instead of multi process
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81           -g, --group=
82               Specify number of groups
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84           -l, --nr_loops=
85               Specify number of loops
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87       Example of messaging
88               .ft C
89               % perf bench sched messaging                 # run with default
90               options (20 sender and receiver processes per group)
91               (10 groups == 400 processes run)
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93                     Total time:0.308 sec
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95               % perf bench sched messaging -t -g 20        # be multi-thread, with 20 groups
96               (20 sender and receiver threads per group)
97               (20 groups == 800 threads run)
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99                     Total time:0.582 sec
100               .ft
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102
103           pipe
104               Suite for pipe() system call. Based on pipe-test-1m.c by Ingo
105               Molnar.
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107       Options of pipe
108           -l, --loop=
109               Specify number of loops.
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111       Example of pipe
112               .ft C
113               % perf bench sched pipe
114               (executing 1000000 pipe operations between two tasks)
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116                       Total time:8.091 sec
117                               8.091833 usecs/op
118                               123581 ops/sec
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120               % perf bench sched pipe -l 1000              # loop 1000
121               (executing 1000 pipe operations between two tasks)
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123                       Total time:0.016 sec
124                               16.948000 usecs/op
125                               59004 ops/sec
126               .ft
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128
129   SUITES FOR syscall
130       basic
131           Suite for evaluating performance of core system call throughput
132           (both usecs/op and ops/sec metrics). This uses a single thread
133           simply doing getppid(2), which is a simple syscall where the result
134           is not cached by glibc.
135
136   SUITES FOR mem
137       memcpy
138           Suite for evaluating performance of simple memory copy in various
139           ways.
140
141       Options of memcpy
142           -l, --size
143               Specify size of memory to copy (default: 1MB). Available units
144               are B, KB, MB, GB and TB (case insensitive).
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146           -f, --function
147               Specify function to copy (default: default). Available
148               functions are depend on the architecture. On x86-64,
149               x86-64-unrolled, x86-64-movsq and x86-64-movsb are supported.
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151           -l, --nr_loops
152               Repeat memcpy invocation this number of times.
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154           -c, --cycles
155               Use perf’s cpu-cycles event instead of gettimeofday syscall.
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157           memset
158               Suite for evaluating performance of simple memory set in
159               various ways.
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161       Options of memset
162           -l, --size
163               Specify size of memory to set (default: 1MB). Available units
164               are B, KB, MB, GB and TB (case insensitive).
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166           -f, --function
167               Specify function to set (default: default). Available functions
168               are depend on the architecture. On x86-64, x86-64-unrolled,
169               x86-64-stosq and x86-64-stosb are supported.
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171           -l, --nr_loops
172               Repeat memset invocation this number of times.
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174           -c, --cycles
175               Use perf’s cpu-cycles event instead of gettimeofday syscall.
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177   SUITES FOR numa
178       mem
179           Suite for evaluating NUMA workloads.
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181   SUITES FOR futex
182       hash
183           Suite for evaluating hash tables.
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185       wake
186           Suite for evaluating wake calls.
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188       wake-parallel
189           Suite for evaluating parallel wake calls.
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191       requeue
192           Suite for evaluating requeue calls.
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194       lock-pi
195           Suite for evaluating futex lock_pi calls.
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197   SUITES FOR epoll
198       wait
199           Suite for evaluating concurrent epoll_wait calls.
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201       ctl
202           Suite for evaluating multiple epoll_ctl calls.
203
204   SUITES FOR internals
205       synthesize
206           Suite for evaluating perf’s event synthesis performance.
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SEE ALSO

209       perf(1)
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213perf                              06/03/2021                     PERF-BENCH(1)