diff options
| author |   Alexey Budankov <alexey.budankov@linux.intel.com> | 2019-01-22 20:50:57 +0300 |
|---|---|---|
| committer |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2019-02-06 10:00:39 -0300 |
| commit | f13de6609a9a25ce4d6dc37c4427f5bc90072fb0 (patch) | |
| tree | ee9ea1ac4234ad029adc23589715293d4656b89a /tools/perf/util/cpumap.c | |
| parent | perf tools: Add fallback versions for CPU_{OR,EQUAL}() (diff) | |
| download | linux-dev-f13de6609a9a25ce4d6dc37c4427f5bc90072fb0.tar.xz linux-dev-f13de6609a9a25ce4d6dc37c4427f5bc90072fb0.zip | |
perf record: Apply affinity masks when reading mmap buffers
Build node cpu masks for mmap data buffers. Apply node cpu masks to tool
thread every time it references data buffers cross node or cross cpu.
Signed-off-by: Alexey Budankov <alexey.budankov@linux.intel.com>
Reviewed-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/b25e4ebc-078d-2c7b-216c-f0bed108d073@linux.intel.com
[ Use cpu-set-sched.h to get the CPU_{EQUAL,OR}() fallbacks for older systems ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/cpumap.c')
| -rw-r--r-- | tools/perf/util/cpumap.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/tools/perf/util/cpumap.c b/tools/perf/util/cpumap.c index 383674f448fc..0bbc3feb0894 100644 --- a/tools/perf/util/cpumap.c +++ b/tools/perf/util/cpumap.c @@ -730,3 +730,13 @@ size_t cpu_map__snprint_mask(struct cpu_map *map, char *buf, size_t size) buf[size - 1] = '\0'; return ptr - buf; } + +const struct cpu_map *cpu_map__online(void) /* thread unsafe */ +{ + static const struct cpu_map *online = NULL; + + if (!online) + online = cpu_map__new(NULL); /* from /sys/devices/system/cpu/online */ + + return online; +} |