Commit-ID: 0a04c9e0b2181aff8348b5e80d9d96ec8df1ffb3
Gitweb: http://git.kernel.org/tip/0a04c9e0b2181aff8348b5e80d9d96ec8df1ffb3
Author: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
AuthorDate: Mon, 18 Aug 2014 17:12:30 -0300
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Thu, 25 Sep 2014 16:46:54 -0300
perf kvm stat live: Use perf_evlist__add_pollfd() instead of local equivalent
Since we can add file descriptors to the evlist pollfd and it will
autogrow, no need to copy all events to a local pollfd array, just add
the timer and stdin file descriptors.
Reviewed-by: David Ahern <dsahern@xxxxxxxxx>
Acked-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Corey Ashford <cjashfor@xxxxxxxxxxxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Jean Pihet <jean.pihet@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Link: http://lkml.kernel.org/n/tip-2hvp9iromiheh6rl4oaa08x5@xxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/perf/builtin-kvm.c | 22 +++++++++-------------
1 file changed, 9 insertions(+), 13 deletions(-)
diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index f5d3ae4..a440219 100644
--- a/tools/perf/builtin-kvm.c
+++ b/tools/perf/builtin-kvm.c
@@ -919,15 +919,8 @@ static int kvm_events_live_report(struct perf_kvm_stat *kvm)
signal(SIGINT, sig_handler);
signal(SIGTERM, sig_handler);
- /* copy pollfds -- need to add timerfd and stdin */
+ /* use pollfds -- need to add timerfd and stdin */
nr_fds = kvm->evlist->nr_fds;
- pollfds = zalloc(sizeof(struct pollfd) * (nr_fds + 2));
- if (!pollfds) {
- err = -ENOMEM;
- goto out;
- }
- memcpy(pollfds, kvm->evlist->pollfd,
- sizeof(struct pollfd) * kvm->evlist->nr_fds);
/* add timer fd */
if (perf_kvm__timerfd_create(kvm) < 0) {
@@ -935,17 +928,21 @@ static int kvm_events_live_report(struct perf_kvm_stat *kvm)
goto out;
}
- pollfds[nr_fds].fd = kvm->timerfd;
- pollfds[nr_fds].events = POLLIN;
+ if (perf_evlist__add_pollfd(kvm->evlist, kvm->timerfd))
+ goto out;
+
nr_fds++;
- pollfds[nr_fds].fd = fileno(stdin);
- pollfds[nr_fds].events = POLLIN;
+ if (perf_evlist__add_pollfd(kvm->evlist, fileno(stdin)))
+ goto out;
+
nr_stdin = nr_fds;
nr_fds++;
if (fd_set_nonblock(fileno(stdin)) != 0)
goto out;
+ pollfds = kvm->evlist->pollfd;
+
/* everything is good - enable the events and process */
perf_evlist__enable(kvm->evlist);
@@ -979,7 +976,6 @@ out:
close(kvm->timerfd);
tcsetattr(0, TCSAFLUSH, &save);
- free(pollfds);
return err;
}
--
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