NAME

       perf-bench - General framework for benchmark suites

SYNOPSIS

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

DESCRIPTION

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

COMMON OPTIONS

       -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

       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 messaging
           -p, --pipe
               Use pipe() instead of socketpair()

           -t, --thread
               Be multi thread instead of multi process

           -g, --group=
               Specify number of groups

           -l, --loop=
               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 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, --cycle
               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, --cycle
               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

       perf(1)