linux/tools/perf/bench
Rabin Vincent 1182f88311 perf bench: Fix memcpy/memset output
The memcpy and memset benchmarks return bogus results when iterations >
0 because the iterations value is not taken into account when
calculating the final result:

 $ perf bench mem memset --only-prefault --length 1GB --iterations 1
 # Running 'mem/memset' benchmark:
 # Copying 1GB Bytes ...

       20.798669 GB/Sec (with prefault)
 $ perf bench mem memset --only-prefault --length 1GB --iterations 10
 # Running 'mem/memset' benchmark:
 # Copying 1GB Bytes ...

        2.086576 GB/Sec (with prefault)
 $ perf bench mem memset --only-prefault --length 1GB --iterations 100
 # Running 'mem/memset' benchmark:
 # Copying 1GB Bytes ...

      212.840917 MB/Sec (with prefault)

Fix this.

Signed-off-by: Rabin Vincent <rabin.vincent@axis.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Rabin Vincent <rabin@rab.in>
Cc: Rabin Vincent <rabinv@axis.com>
Link: http://lkml.kernel.org/r/1417535441-3965-3-git-send-email-rabin.vincent@axis.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-12-09 09:14:08 -03:00
..
bench.h perf bench: Add --repeat option 2014-06-19 16:13:15 -03:00
futex-hash.c perf bench futex: Support operations for shared futexes 2014-09-29 15:43:21 -03:00
futex-requeue.c perf bench futex: Sanitize -q option in requeue 2014-09-29 15:43:26 -03:00
futex-wake.c perf bench futex: Support operations for shared futexes 2014-09-29 15:43:21 -03:00
futex.h perf bench: Add futex-requeue microbenchmark 2014-03-14 11:20:44 -03:00
mem-memcpy-arch.h
mem-memcpy-x86-64-asm-def.h
mem-memcpy-x86-64-asm.S
mem-memcpy.c perf bench: Fix memcpy/memset output 2014-12-09 09:14:08 -03:00
mem-memset-arch.h
mem-memset-x86-64-asm-def.h
mem-memset-x86-64-asm.S
numa.c Merge branch 'perf-core-for-mingo' into perf/urgent 2014-04-14 16:45:39 +02:00
sched-messaging.c perf tools: Don't include sys/poll.h directly 2014-09-17 17:08:09 -03:00
sched-pipe.c perf bench sched: Add --threaded option 2013-10-11 12:17:25 -03:00