[PATCH 01/52] perf cpu_map: Add cpu_map__empty_new function

From: Jiri Olsa
Date: Sun Oct 25 2015 - 11:11:58 EST


Adding cpu_map__empty_new interface to create empty cpumap
with given size. The cpumap entries are initialized with -1.

It'll be used for caching cpu_map in following patches.

Link: http://lkml.kernel.org/n/tip-2q9tmp3shdscmtiv6h8afhvd@xxxxxxxxxxxxxx
Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
---
tools/perf/util/cpumap.c | 17 +++++++++++++++++
tools/perf/util/cpumap.h | 1 +
2 files changed, 18 insertions(+)

diff --git a/tools/perf/util/cpumap.c b/tools/perf/util/cpumap.c
index aa6b490aa471..10af1e7524fb 100644
--- a/tools/perf/util/cpumap.c
+++ b/tools/perf/util/cpumap.c
@@ -203,6 +203,23 @@ struct cpu_map *cpu_map__dummy_new(void)
return cpus;
}

+struct cpu_map *cpu_map__empty_new(int nr)
+{
+ struct cpu_map *cpus = malloc(sizeof(*cpus) + sizeof(int) * nr);
+
+ if (cpus != NULL) {
+ int i;
+
+ cpus->nr = nr;
+ for (i = 0; i < nr; i++)
+ cpus->map[i] = -1;
+
+ atomic_set(&cpus->refcnt, 1);
+ }
+
+ return cpus;
+}
+
static void cpu_map__delete(struct cpu_map *map)
{
if (map) {
diff --git a/tools/perf/util/cpumap.h b/tools/perf/util/cpumap.h
index f1bcd2cfa164..85f7772457fa 100644
--- a/tools/perf/util/cpumap.h
+++ b/tools/perf/util/cpumap.h
@@ -15,6 +15,7 @@ struct cpu_map {
};

struct cpu_map *cpu_map__new(const char *cpu_list);
+struct cpu_map *cpu_map__empty_new(int nr);
struct cpu_map *cpu_map__dummy_new(void);
struct cpu_map *cpu_map__read(FILE *file);
size_t cpu_map__fprintf(struct cpu_map *map, FILE *fp);
--
2.4.3

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/