perf-bench(1) - Linux manual page

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.
mem
Memory access performance.
numa
NUMA scheduling and MM benchmarks.
futex
Futex stressing benchmarks.
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 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.

COLOPHON top