diff options
author | Stephane Eranian <eranian@google.com> | 2010-05-28 06:00:01 -0400 |
---|---|---|
committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2010-06-05 08:33:01 -0400 |
commit | c45c6ea2e5c57960dc67e00294c2b78e9540c007 (patch) | |
tree | 27c56577862cbb95fb8db4b34cfe99878d5dc9a0 /tools/perf/Documentation/perf-top.txt | |
parent | 761844b9c68b3c67b085265f92ac0675706cc3b3 (diff) |
perf tools: Add the ability to specify list of cpus to monitor
This patch adds a -C option to stat, record, top to designate a list of CPUs to
monitor. CPUs can be specified as a comma-separated list or ranges, no space
allowed.
Examples:
$ perf record -a -C0-1,4-7 sleep 1
$ perf top -C0-4
$ perf stat -a -C1,2,3,4 sleep 1
With perf record in per-thread mode with inherit mode on, samples are collected
only when the thread runs on the designated CPUs.
The -C option does not turn on system-wide mode automatically.
Cc: David S. Miller <davem@davemloft.net>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <4bff9496.d345d80a.41fe.7b00@mx.google.com>
Signed-off-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/Documentation/perf-top.txt')
-rw-r--r-- | tools/perf/Documentation/perf-top.txt | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/tools/perf/Documentation/perf-top.txt b/tools/perf/Documentation/perf-top.txt index 785b9fc32a46..1f9687663f2a 100644 --- a/tools/perf/Documentation/perf-top.txt +++ b/tools/perf/Documentation/perf-top.txt | |||
@@ -25,9 +25,11 @@ OPTIONS | |||
25 | --count=<count>:: | 25 | --count=<count>:: |
26 | Event period to sample. | 26 | Event period to sample. |
27 | 27 | ||
28 | -C <cpu>:: | 28 | -C <cpu-list>:: |
29 | --CPU=<cpu>:: | 29 | --cpu=<cpu>:: |
30 | CPU to profile. | 30 | Monitor only on the list of cpus provided. Multiple CPUs can be provided as a |
31 | comma-sperated list with no space: 0,1. Ranges of CPUs are specified with -: 0-2. | ||
32 | Default is to monitor all CPUS. | ||
31 | 33 | ||
32 | -d <seconds>:: | 34 | -d <seconds>:: |
33 | --delay=<seconds>:: | 35 | --delay=<seconds>:: |