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| author | Stephane Eranian <eranian@google.com> | 2010-05-28 12:00:01 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2010-06-05 09:33:01 -0300 |
| commit | c45c6ea2e5c57960dc67e00294c2b78e9540c007 (patch) | |
| tree | 27c56577862cbb95fb8db4b34cfe99878d5dc9a0 /tools/perf/util/cpumap.h | |
| parent | 761844b9c68b3c67b085265f92ac0675706cc3b3 (diff) | |
| download | lwn-c45c6ea2e5c57960dc67e00294c2b78e9540c007.tar.gz lwn-c45c6ea2e5c57960dc67e00294c2b78e9540c007.zip | |
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/util/cpumap.h')
| -rw-r--r-- | tools/perf/util/cpumap.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/perf/util/cpumap.h b/tools/perf/util/cpumap.h index 86c78bb33098..3e60f56e490e 100644 --- a/tools/perf/util/cpumap.h +++ b/tools/perf/util/cpumap.h @@ -1,7 +1,7 @@ #ifndef __PERF_CPUMAP_H #define __PERF_CPUMAP_H -extern int read_cpu_map(void); +extern int read_cpu_map(const char *cpu_list); extern int cpumap[]; #endif /* __PERF_CPUMAP_H */ |