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authorArnaldo Carvalho de Melo <acme@redhat.com>2012-09-26 12:41:14 -0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2012-09-26 12:41:14 -0300
commita14bb7a6fd4a3d563ca971daf462ba4dc294a7a6 (patch)
tree5ad6003f5cf57019c55b44023e10401e2d01b78e
parent0b80f8b32f31f80e001fb6355fd86769555c4a3c (diff)
downloadlinux-linaro-stable-a14bb7a6fd4a3d563ca971daf462ba4dc294a7a6.tar.gz
perf tools: Allow handling a NULL cpu_map as meaning "all cpus"
Or one with cpu_map->map[0] == -1. Reducing the boilerplate in setting up an evlist by nor requiring a cpu_map to be created at all. Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Namhyung Kim <namhyung@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-rnaqn3dtnsfo1wlbbf3fhx00@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
-rw-r--r--tools/perf/util/cpumap.h11
-rw-r--r--tools/perf/util/evlist.c12
2 files changed, 17 insertions, 6 deletions
diff --git a/tools/perf/util/cpumap.h b/tools/perf/util/cpumap.h
index 17b5264f6436..2f68a3b8c285 100644
--- a/tools/perf/util/cpumap.h
+++ b/tools/perf/util/cpumap.h
@@ -2,6 +2,7 @@
#define __PERF_CPUMAP_H
#include <stdio.h>
+#include <stdbool.h>
struct cpu_map {
int nr;
@@ -14,4 +15,14 @@ void cpu_map__delete(struct cpu_map *map);
struct cpu_map *cpu_map__read(FILE *file);
size_t cpu_map__fprintf(struct cpu_map *map, FILE *fp);
+static inline int cpu_map__nr(const struct cpu_map *map)
+{
+ return map ? map->nr : 1;
+}
+
+static inline bool cpu_map__all(const struct cpu_map *map)
+{
+ return map ? map->map[0] == -1 : true;
+}
+
#endif /* __PERF_CPUMAP_H */
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 892353729c7a..27f6de3aab16 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -304,7 +304,7 @@ void perf_evlist__enable(struct perf_evlist *evlist)
int cpu, thread;
struct perf_evsel *pos;
- for (cpu = 0; cpu < evlist->cpus->nr; cpu++) {
+ for (cpu = 0; cpu < cpu_map__nr(evlist->cpus); cpu++) {
list_for_each_entry(pos, &evlist->entries, node) {
for (thread = 0; thread < evlist->threads->nr; thread++)
ioctl(FD(pos, cpu, thread),
@@ -315,7 +315,7 @@ void perf_evlist__enable(struct perf_evlist *evlist)
static int perf_evlist__alloc_pollfd(struct perf_evlist *evlist)
{
- int nfds = evlist->cpus->nr * evlist->threads->nr * evlist->nr_entries;
+ int nfds = cpu_map__nr(evlist->cpus) * evlist->threads->nr * evlist->nr_entries;
evlist->pollfd = malloc(sizeof(struct pollfd) * nfds);
return evlist->pollfd != NULL ? 0 : -ENOMEM;
}
@@ -475,8 +475,8 @@ void perf_evlist__munmap(struct perf_evlist *evlist)
static int perf_evlist__alloc_mmap(struct perf_evlist *evlist)
{
- evlist->nr_mmaps = evlist->cpus->nr;
- if (evlist->cpus->map[0] == -1)
+ evlist->nr_mmaps = cpu_map__nr(evlist->cpus);
+ if (cpu_map__all(evlist->cpus))
evlist->nr_mmaps = evlist->threads->nr;
evlist->mmap = zalloc(evlist->nr_mmaps * sizeof(struct perf_mmap));
return evlist->mmap != NULL ? 0 : -ENOMEM;
@@ -622,11 +622,11 @@ int perf_evlist__mmap(struct perf_evlist *evlist, unsigned int pages,
list_for_each_entry(evsel, &evlist->entries, node) {
if ((evsel->attr.read_format & PERF_FORMAT_ID) &&
evsel->sample_id == NULL &&
- perf_evsel__alloc_id(evsel, cpus->nr, threads->nr) < 0)
+ perf_evsel__alloc_id(evsel, cpu_map__nr(cpus), threads->nr) < 0)
return -ENOMEM;
}
- if (evlist->cpus->map[0] == -1)
+ if (cpu_map__all(cpus))
return perf_evlist__mmap_per_thread(evlist, prot, mask);
return perf_evlist__mmap_per_cpu(evlist, prot, mask);