Commit 5a5ddeb6 authored by Wang Nan's avatar Wang Nan Committed by Arnaldo Carvalho de Melo
Browse files

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: default avatarWang 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: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent e10e4ef6

tools/perf/util/evlist.c

+8 −1
Original line number Diff line number Diff line
@@ -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];

tools/perf/util/evlist.h

+2 −0
Original line number Diff line number Diff line
@@ -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);

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