diff options
Diffstat (limited to 'tools/perf/lib/evlist.c')
| -rw-r--r-- | tools/perf/lib/evlist.c | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/tools/perf/lib/evlist.c b/tools/perf/lib/evlist.c index 65045614c938..854efff1519d 100644 --- a/tools/perf/lib/evlist.c +++ b/tools/perf/lib/evlist.c @@ -347,6 +347,8 @@ static struct perf_mmap* perf_evlist__alloc_mmap(struct perf_evlist *evlist, boo return NULL; for (i = 0; i < evlist->nr_mmaps; i++) { + struct perf_mmap *prev = i ? &map[i - 1] : NULL; + /* * When the perf_mmap() call is made we grab one refcount, plus * one extra to let perf_mmap__consume() get the last @@ -356,7 +358,7 @@ static struct perf_mmap* perf_evlist__alloc_mmap(struct perf_evlist *evlist, boo * Each PERF_EVENT_IOC_SET_OUTPUT points to this mmap and * thus does perf_mmap__get() on it. */ - perf_mmap__init(&map[i], overwrite, NULL); + perf_mmap__init(&map[i], prev, overwrite, NULL); } return map; @@ -405,6 +407,15 @@ perf_evlist__mmap_cb_mmap(struct perf_mmap *map, struct perf_mmap_param *mp, return perf_mmap__mmap(map, mp, output, cpu); } +static void perf_evlist__set_mmap_first(struct perf_evlist *evlist, struct perf_mmap *map, + bool overwrite) +{ + if (overwrite) + evlist->mmap_ovw_first = map; + else + evlist->mmap_first = map; +} + static int mmap_per_evsel(struct perf_evlist *evlist, struct perf_evlist_mmap_ops *ops, int idx, struct perf_mmap_param *mp, int cpu_idx, @@ -460,6 +471,9 @@ mmap_per_evsel(struct perf_evlist *evlist, struct perf_evlist_mmap_ops *ops, if (ops->mmap(map, mp, *output, evlist_cpu) < 0) return -1; + + if (!idx) + perf_evlist__set_mmap_first(evlist, map, overwrite); } else { if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, *output) != 0) return -1; @@ -605,3 +619,13 @@ void perf_evlist__munmap(struct perf_evlist *evlist) zfree(&evlist->mmap); zfree(&evlist->mmap_ovw); } + +struct perf_mmap* +perf_evlist__next_mmap(struct perf_evlist *evlist, struct perf_mmap *map, + bool overwrite) +{ + if (map) + return map->next; + + return overwrite ? evlist->mmap_ovw_first : evlist->mmap_first; +} |