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authorArnaldo Carvalho de Melo <acme@redhat.com>2014-08-19 00:12:30 +0400
committerArnaldo Carvalho de Melo <acme@redhat.com>2014-09-25 23:46:54 +0400
commit0a04c9e0b2181aff8348b5e80d9d96ec8df1ffb3 (patch)
tree285bce0f10494c9a081f5bf16995968e89fc4242 /tools
parent9ae28035b8677b82e1d71cea4f793cb5504ec104 (diff)
downloadlinux-0a04c9e0b2181aff8348b5e80d9d96ec8df1ffb3.tar.xz
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@gmail.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jean Pihet <jean.pihet@linaro.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/n/tip-2hvp9iromiheh6rl4oaa08x5@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/builtin-kvm.c22
1 files changed, 9 insertions, 13 deletions
diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index f5d3ae483110..a440219b0be0 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;
}