diff options
author | Jiri Olsa <jolsa@redhat.com> | 2013-09-01 12:36:13 +0200 |
---|---|---|
committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2013-10-09 11:24:20 -0300 |
commit | 27050f530dc4fd88dc93d85c177e000efe970d12 (patch) | |
tree | 2d73d0b265fb05f74c2dfb00a83ee0241c736097 /tools/perf/Documentation/perf-kvm.txt | |
parent | 994a1f78b191df0c9d6caca3f3afb03e247aff26 (diff) | |
download | linux-27050f530dc4fd88dc93d85c177e000efe970d12.tar.bz2 |
perf tools: Add possibility to specify mmap size
Adding possibility to specify mmap size via -m/--mmap-pages
by appending unit size character (B/K/M/G) to the
number, like:
$ perf record -m 8K ls
$ perf record -m 2M ls
The size is rounded up appropriately to follow perf
mmap restrictions.
If no unit is specified the number provides pages as
of now, like:
$ perf record -m 8 ls
Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1378031796-17892-3-git-send-email-jolsa@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/Documentation/perf-kvm.txt')
-rw-r--r-- | tools/perf/Documentation/perf-kvm.txt | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/tools/perf/Documentation/perf-kvm.txt b/tools/perf/Documentation/perf-kvm.txt index ac84db2d2334..6a06cefe9642 100644 --- a/tools/perf/Documentation/perf-kvm.txt +++ b/tools/perf/Documentation/perf-kvm.txt @@ -109,7 +109,9 @@ STAT LIVE OPTIONS -m:: --mmap-pages=:: - Number of mmap data pages. Must be a power of two. + Number of mmap data pages (must be a power of two) or size + specification with appended unit character - B/K/M/G. The + size is rounded up to have nearest pages power of two value. -a:: --all-cpus:: |