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NAME | SYNOPSIS | DESCRIPTION | COMMON OPTIONS | SUBSYSTEM | SEE ALSO | COLOPHON |
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PERF-BENCH(1) perf Manual PERF-BENCH(1)
perf-bench - General framework for benchmark suites
perf bench [<common options>] <subsystem> <suite> [<options>]
This perf bench command is a general framework for benchmark
suites.
-r, --repeat=
Specify number of times to repeat the run (default 10).
-f, --format=
Specify format style. Current available format styles are:
default
Default style. This is mainly for human reading.
.ft C
% perf bench sched pipe # with no style specified
(executing 1000000 pipe operations between two tasks)
Total time:5.855 sec
5.855061 usecs/op
170792 ops/sec
.ft
simple
This simple style is friendly for automated processing by
scripts.
.ft C
% perf bench --format=simple sched pipe # specified simple
5.988
.ft
sched
Scheduler and IPC mechanisms.
syscall
System call performance (throughput).
mem
Memory access performance.
numa
NUMA scheduling and MM benchmarks.
futex
Futex stressing benchmarks.
epoll
Eventpoll (epoll) stressing benchmarks.
internals
Benchmark internal perf functionality.
uprobe
Benchmark overhead of uprobe + BPF.
all
All benchmark subsystems.
[1mSUITES FOR sched
messaging
Suite for evaluating performance of scheduler and IPC
mechanisms. Based on hackbench by Rusty Russell.
Options of messaging
-p, --pipe
Use pipe() instead of socketpair()
-t, --thread
Be multi thread instead of multi process
-g, --group=
Specify number of groups
-l, --nr_loops=
Specify number of loops
Example of messaging
.ft C
% perf bench sched messaging # run with default
options (20 sender and receiver processes per group)
(10 groups == 400 processes run)
Total time:0.308 sec
% perf bench sched messaging -t -g 20 # be multi-thread, with 20 groups
(20 sender and receiver threads per group)
(20 groups == 800 threads run)
Total time:0.582 sec
.ft
pipe
Suite for pipe() system call. Based on pipe-test-1m.c by
Ingo Molnar.
Options of pipe
-l, --loop=
Specify number of loops.
-G, --cgroups=
Names of cgroups for sender and receiver, separated by a
comma. This is useful to check cgroup context switching
overhead. Note that perf doesn’t create nor delete the
cgroups, so users should make sure that the cgroups exist
and are accessible before use.
Example of pipe
.ft C
% perf bench sched pipe
(executing 1000000 pipe operations between two tasks)
Total time:8.091 sec
8.091833 usecs/op
123581 ops/sec
% perf bench sched pipe -l 1000 # loop 1000
(executing 1000 pipe operations between two tasks)
Total time:0.016 sec
16.948000 usecs/op
59004 ops/sec
% perf bench sched pipe -G AAA,BBB
(executing 1000000 pipe operations between cgroups)
# Running 'sched/pipe' benchmark:
# Executed 1000000 pipe operations between two processes
Total time: 6.886 [sec]
6.886208 usecs/op
145217 ops/sec
.ft
[1mSUITES FOR syscall
basic
Suite for evaluating performance of core system call
throughput (both usecs/op and ops/sec metrics). This uses a
single thread simply doing getppid(2), which is a simple
syscall where the result is not cached by glibc.
[1mSUITES FOR mem
memcpy
Suite for evaluating performance of simple memory copy in
various ways.
Options of memcpy
-l, --size
Specify size of memory to copy (default: 1MB). Available
units are B, KB, MB, GB and TB (case insensitive).
-f, --function
Specify function to copy (default: default). Available
functions are depend on the architecture. On x86-64,
x86-64-unrolled, x86-64-movsq and x86-64-movsb are
supported.
-l, --nr_loops
Repeat memcpy invocation this number of times.
-c, --cycles
Use perf’s cpu-cycles event instead of gettimeofday
syscall.
memset
Suite for evaluating performance of simple memory set in
various ways.
Options of memset
-l, --size
Specify size of memory to set (default: 1MB). Available
units are B, KB, MB, GB and TB (case insensitive).
-f, --function
Specify function to set (default: default). Available
functions are depend on the architecture. On x86-64,
x86-64-unrolled, x86-64-stosq and x86-64-stosb are
supported.
-l, --nr_loops
Repeat memset invocation this number of times.
-c, --cycles
Use perf’s cpu-cycles event instead of gettimeofday
syscall.
[1mSUITES FOR numa
mem
Suite for evaluating NUMA workloads.
[1mSUITES FOR futex
hash
Suite for evaluating hash tables.
wake
Suite for evaluating wake calls.
wake-parallel
Suite for evaluating parallel wake calls.
requeue
Suite for evaluating requeue calls.
lock-pi
Suite for evaluating futex lock_pi calls.
[1mSUITES FOR epoll
wait
Suite for evaluating concurrent epoll_wait calls.
ctl
Suite for evaluating multiple epoll_ctl calls.
[1mSUITES FOR internals
synthesize
Suite for evaluating perf’s event synthesis performance.
perf(1)
This page is part of the perf (Performance analysis tools for
Linux (in Linux source tree)) project. Information about the
project can be found at
⟨https://perf.wiki.kernel.org/index.php/Main_Page⟩. If you have a
bug report for this manual page, send it to
linux-kernel@vger.kernel.org. This page was obtained from the
project's upstream Git repository
⟨http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git⟩
on 2024-06-14. (At that time, the date of the most recent commit
that was found in the repository was 2024-06-13.) If you
discover any rendering problems in this HTML version of the page,
or you believe there is a better or more up-to-date source for
the page, or you have corrections or improvements to the
information in this COLOPHON (which is not part of the original
manual page), send a mail to man-pages@man7.org
perf 2023-10-25 PERF-BENCH(1)
Pages that refer to this page: perf(1)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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