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perf evlist: Choose correct reading direction according to evlist->backward

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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>
This commit is contained in:
Wang Nan 2016-05-25 13:44:50 +00:00 committed by Arnaldo Carvalho de Melo
parent e10e4ef63b
commit 5a5ddeb6e3
2 changed files with 10 additions and 1 deletions
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9
tools/perf/util/evlist.c
View File

@ -777,7 +777,7 @@ perf_mmap__read(struct perf_mmap *md, bool check_messup, u64 start,
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];

2
tools/perf/util/evlist.h
View File

@ -131,6 +131,8 @@ struct perf_sample_id *perf_evlist__id2sid(struct perf_evlist *evlist, u64 id);
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);
union perf_event *perf_evlist__mmap_read_backward(struct perf_evlist *evlist,
int idx);
void perf_evlist__mmap_read_catchup(struct perf_evlist *evlist, int idx);