perf-bench(1) — Linux manual page

NAME | SYNOPSIS | DESCRIPTION | COMMON OPTIONS | SUBSYSTEM | SEE ALSO | COLOPHON

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

NAME         top

       perf-bench - General framework for benchmark suites

SYNOPSIS         top

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

DESCRIPTION         top

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

COMMON OPTIONS         top

       -r, --repeat=
           Specify amount 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

SUBSYSTEM         top

       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.

       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 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.

       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
               .ft

   SUITES 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.

   SUITES 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.

   SUITES FOR numa
       mem
           Suite for evaluating NUMA workloads.

   SUITES 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.

   SUITES FOR epoll
       wait
           Suite for evaluating concurrent epoll_wait calls.

       ctl
           Suite for evaluating multiple epoll_ctl calls.

   SUITES FOR internals
       synthesize
           Suite for evaluating perf’s event synthesis performance.

SEE ALSO         top

       perf(1)

COLOPHON         top

       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 2021-08-27.  (At that time, the date of the most recent commit
       that was found in the repository was 2021-08-26.)  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                           2020-07-28                  PERF-BENCH(1)

Pages that refer to this page: perf(1)