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authorMark Rutland <mark.rutland@arm.com>2016-07-15 11:08:11 +0100
committerArnaldo Carvalho de Melo <acme@redhat.com>2016-07-18 19:42:47 -0300
commit9a6c582d57a0fc37fa4e13a69d9129fb3d98a401 (patch)
treea2dc1be66870ab9ed15a8265eac5e8ea744a4df3 /tools/perf
parent00e727bb389359c81101b03d34fec8cc7be5168d (diff)
downloadlinux-9a6c582d57a0fc37fa4e13a69d9129fb3d98a401.tar.bz2
perf cpu_map: Add more helpers
In some cases it's necessry to figure out the map-local index of a given Linux logical CPU ID. Add a new helper, cpu_map__idx, to acquire this. As the logic is largely the same as the existing cpu_map__has, this is rewritten in terms of the new helper. At the same time, add the inverse operation, cpu_map__cpu, which yields the logical CPU id for a map-local index. While this can be performed manually, wrapping this in a helper can make code more legible. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: He Kuang <hekuang@huawei.com> Cc: Kan Liang <kan.liang@intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/r/1468577293-19667-3-git-send-email-mark.rutland@arm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
-rw-r--r--tools/perf/util/cpumap.c14
-rw-r--r--tools/perf/util/cpumap.h2
2 files changed, 14 insertions, 2 deletions
diff --git a/tools/perf/util/cpumap.c b/tools/perf/util/cpumap.c
index 15f83acac1b8..2c0b52264a46 100644
--- a/tools/perf/util/cpumap.c
+++ b/tools/perf/util/cpumap.c
@@ -589,14 +589,24 @@ int cpu__setup_cpunode_map(void)
bool cpu_map__has(struct cpu_map *cpus, int cpu)
{
+ return cpu_map__idx(cpus, cpu) != -1;
+}
+
+int cpu_map__idx(struct cpu_map *cpus, int cpu)
+{
int i;
for (i = 0; i < cpus->nr; ++i) {
if (cpus->map[i] == cpu)
- return true;
+ return i;
}
- return false;
+ return -1;
+}
+
+int cpu_map__cpu(struct cpu_map *cpus, int idx)
+{
+ return cpus->map[idx];
}
size_t cpu_map__snprint(struct cpu_map *map, char *buf, size_t size)
diff --git a/tools/perf/util/cpumap.h b/tools/perf/util/cpumap.h
index 206dc550354a..06bd689f5989 100644
--- a/tools/perf/util/cpumap.h
+++ b/tools/perf/util/cpumap.h
@@ -68,5 +68,7 @@ int cpu_map__build_map(struct cpu_map *cpus, struct cpu_map **res,
int (*f)(struct cpu_map *map, int cpu, void *data),
void *data);
+int cpu_map__cpu(struct cpu_map *cpus, int idx);
bool cpu_map__has(struct cpu_map *cpus, int cpu);
+int cpu_map__idx(struct cpu_map *cpus, int cpu);
#endif /* __PERF_CPUMAP_H */