lkml.org 
[lkml]   [2015]   [Oct]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 07/57] perf tools: Add cpu_map__empty_new function
Date
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@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
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 c51c29fd0732..94d30c8d7255 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 8982d538da83..91fd5d1a4cdc 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


\
 
 \ /
  Last update: 2015-10-16 13:21    [W:0.752 / U:0.496 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site