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| author |   Wang Nan <wangnan0@huawei.com> | 2016-05-25 13:44:50 +0000 |
|---|---|---|
| committer |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-05-30 12:41:45 -0300 |
| commit | 5a5ddeb6e3559675070df6b39ba32a4dd1ab4dd5 (patch) | |
| tree | ca0f5a4d7d87164d405c52fb59d9364cf7d38688 /tools/perf/util/evlist.c | |
| parent | perf evlist: Check 'base' pointer before checking refcnt when put a mmap (diff) | |
| download | linux-dev-5a5ddeb6e3559675070df6b39ba32a4dd1ab4dd5.tar.xz linux-dev-5a5ddeb6e3559675070df6b39ba32a4dd1ab4dd5.zip | |
perf evlist: Choose correct reading direction according to evlist->backward
Now we have evlist->backward to indicate the mmap direction. Make
perf_evlist__mmap_read() choose right direction automatically.
Signed-off-by: Wang Nan <wangnan0@huawei.com>
Cc: He Kuang <hekuang@huawei.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1464183898-174512-3-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/evlist.c')
| -rw-r--r-- | tools/perf/util/evlist.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c index 58ede3257c61..719729ef9d7c 100644 --- a/tools/perf/util/evlist.c +++ b/tools/perf/util/evlist.c @@ -777,7 +777,7 @@ broken_event: return event; } -union perf_event *perf_evlist__mmap_read(struct perf_evlist *evlist, int idx) +union perf_event *perf_evlist__mmap_read_forward(struct perf_evlist *evlist, int idx) { struct perf_mmap *md = &evlist->mmap[idx]; u64 head; @@ -832,6 +832,13 @@ perf_evlist__mmap_read_backward(struct perf_evlist *evlist, int idx) return perf_mmap__read(md, false, start, end, &md->prev); } +union perf_event *perf_evlist__mmap_read(struct perf_evlist *evlist, int idx) +{ + if (!evlist->backward) + return perf_evlist__mmap_read_forward(evlist, idx); + return perf_evlist__mmap_read_backward(evlist, idx); +} + void perf_evlist__mmap_read_catchup(struct perf_evlist *evlist, int idx) { struct perf_mmap *md = &evlist->mmap[idx]; |