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perf-bench

NAME

perf-bench - General framework for benchmark suites

SYNOPSIS

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

DESCRIPTION

This perf bench command is 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.

SUITES FOR sched

messaging

Suite for evaluating performance of scheduler and IPC mechanisms. Based on hackbench by Rusty Russell.

Options of pipe

-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
 
 

SEE ALSO

perf(1)