diff options
| author | Ingo Molnar <mingo@kernel.org> | 2015-10-19 10:04:18 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2015-10-19 15:05:34 -0300 |
| commit | 276197415685e2a91ce367562800cf0f8fbe482c (patch) | |
| tree | af3791974742f317a8fb0cddd623a4bfa590a653 /tools | |
| parent | 13839ec495a31844d66d487f740c07771c60a0d0 (diff) | |
| download | linux-276197415685e2a91ce367562800cf0f8fbe482c.tar.bz2 | |
perf bench: Default to all routines in 'perf bench mem'
So few people know that the --routine option to 'perf bench memcpy/memset'
exists, and would not know that it's capable of testing the kernel's
memcpy/memset implementations.
Furthermore, 'perf bench mem all' will not run all routines:
vega:~> perf bench mem all
# Running mem/memcpy benchmark...
Routine default (Default memcpy() provided by glibc)
# Copying 1MB Bytes ...
894.454383 MB/Sec
3.844734 GB/Sec (with prefault)
# Running mem/memset benchmark...
Routine default (Default memset() provided by glibc)
# Copying 1MB Bytes ...
1.220703 GB/Sec
9.042245 GB/Sec (with prefault)
Because misleadingly the 'all' refers to 'all sub-benchmarks', not 'all
sub-benchmarks and routines'.
Fix all this by making the memcpy/memset routine to default to 'all',
which results in all the benchmarks being run:
triton:~> perf bench mem all
# Running mem/memcpy benchmark...
Routine default (Default memcpy() provided by glibc)
# Copying 1MB Bytes ...
1.448906 GB/Sec
4.957170 GB/Sec (with prefault)
Routine x86-64-unrolled (unrolled memcpy() in arch/x86/lib/memcpy_64.S)
# Copying 1MB Bytes ...
1.614153 GB/Sec
4.379204 GB/Sec (with prefault)
Routine x86-64-movsq (movsq-based memcpy() in arch/x86/lib/memcpy_64.S)
# Copying 1MB Bytes ...
1.570036 GB/Sec
4.264465 GB/Sec (with prefault)
Routine x86-64-movsb (movsb-based memcpy() in arch/x86/lib/memcpy_64.S)
# Copying 1MB Bytes ...
1.788576 GB/Sec
6.554111 GB/Sec (with prefault)
# Running mem/memset benchmark...
Routine default (Default memset() provided by glibc)
# Copying 1MB Bytes ...
2.082223 GB/Sec
9.126752 GB/Sec (with prefault)
Routine x86-64-unrolled (unrolled memset() in arch/x86/lib/memset_64.S)
# Copying 1MB Bytes ...
5.710892 GB/Sec
8.346688 GB/Sec (with prefault)
Routine x86-64-stosq (movsq-based memset() in arch/x86/lib/memset_64.S)
# Copying 1MB Bytes ...
9.765625 GB/Sec
12.520032 GB/Sec (with prefault)
Routine x86-64-stosb (movsb-based memset() in arch/x86/lib/memset_64.S)
# Copying 1MB Bytes ...
9.668936 GB/Sec
12.682630 GB/Sec (with prefault)
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1445241870-24854-3-git-send-email-mingo@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/bench/mem-memcpy.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/tools/perf/bench/mem-memcpy.c b/tools/perf/bench/mem-memcpy.c index 27606ff5c4f9..263f84171ae5 100644 --- a/tools/perf/bench/mem-memcpy.c +++ b/tools/perf/bench/mem-memcpy.c @@ -24,7 +24,7 @@ #define K 1024 static const char *length_str = "1MB"; -static const char *routine = "default"; +static const char *routine = "all"; static int iterations = 1; static bool use_cycle; static int cycle_fd; @@ -35,7 +35,7 @@ static const struct option options[] = { OPT_STRING('l', "length", &length_str, "1MB", "Specify length of memory to copy. " "Available units: B, KB, MB, GB and TB (upper and lower)"), - OPT_STRING('r', "routine", &routine, "default", + OPT_STRING('r', "routine", &routine, "all", "Specify routine to copy, \"all\" runs all available routines"), OPT_INTEGER('i', "iterations", &iterations, "repeat memcpy() invocation this number of times"), |