Commit-ID: 033fa713db66b96d5779e6a93d50ff821bc1abd2 Gitweb: http://git.kernel.org/tip/033fa713db66b96d5779e6a93d50ff821bc1abd2 Author: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> AuthorDate: Mon, 8 Sep 2014 12:55:12 -0300 Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> CommitDate: Thu, 25 Sep 2014 16:46:54 -0300 perf evlist: We need to poll all event file descriptors Because we want to notice when they get POLLHUP'ed, so that we can figure out when all threads exited in a workload being monitored. We can't just monitor the fds that were mmaped, we need to notice when all the fds that were PERF_EVENT_IOC_SET_OUTPUT'ed too, because the mmap stays even after the fd that originally was used to do the mmap call went away, its only when all the set-output fds for a mmap are gone that the mmap is. Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx> Cc: David Ahern <dsahern@xxxxxxxxx> Cc: Don Zickus <dzickus@xxxxxxxxxx> Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx> Cc: Jiri Olsa <jolsa@xxxxxxxxxx> Cc: Mike Galbraith <efault@xxxxxx> Cc: Namhyung Kim <namhyung@xxxxxxxxxx> Cc: Paul Mackerras <paulus@xxxxxxxxx> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> Cc: Stephane Eranian <eranian@xxxxxxxxxx> Link: http://lkml.kernel.org/r/20140908151016.GH17728@xxxxxxxxxxxxxxxxxxxx Link: http://lkml.kernel.org/n/tip-24omlq5asrfg4uo3muuzn2bl@xxxxxxxxxxxxxx Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> --- tools/perf/util/evlist.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c index 502cd11..6b13bfa 100644 --- a/tools/perf/util/evlist.c +++ b/tools/perf/util/evlist.c @@ -717,8 +717,6 @@ static int __perf_evlist__mmap(struct perf_evlist *evlist, int idx, evlist->mmap[idx].base = NULL; return -1; } - - perf_evlist__add_pollfd(evlist, fd); return 0; } @@ -745,6 +743,8 @@ static int perf_evlist__mmap_per_evsel(struct perf_evlist *evlist, int idx, return -1; } + perf_evlist__add_pollfd(evlist, fd); + if ((evsel->attr.read_format & PERF_FORMAT_ID) && perf_evlist__id_add_fd(evlist, evsel, cpu, thread, fd) < 0) return -1; -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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