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perf kvm stat live: Use fdarray object instead of pollfd

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The reason is that we don't need to count the number of file descriptors
because it's already handled in fdarray object.

Signed-off-by: Jiri Olsa <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Corey Ashford <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Milian Wolff <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
This commit is contained in:
Jiri Olsa 2014-10-01 18:00:29 +02:00 • committed by Arnaldo Carvalho de Melo
commit 1ca72260e4
1 changed files with 4 additions and 12 deletions
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16
tools/perf/builtin-kvm.c
View file

@ -896,8 +896,7 @@ static int perf_kvm__handle_stdin(void)
static int kvm_events_live_report(struct perf_kvm_stat *kvm)
{
struct pollfd *pollfds = NULL;
int nr_fds, nr_stdin, ret, err = -EINVAL;
int nr_stdin, ret, err = -EINVAL;
struct termios save;
/* live flag must be set first */
@ -919,9 +918,6 @@ static int kvm_events_live_report(struct perf_kvm_stat *kvm)
signal(SIGINT, sig_handler);
signal(SIGTERM, sig_handler);
/* use pollfds -- need to add timerfd and stdin */
nr_fds = kvm->evlist->pollfd.nr;
/* add timer fd */
if (perf_kvm__timerfd_create(kvm) < 0) {
err = -1;
@ -931,22 +927,18 @@ static int kvm_events_live_report(struct perf_kvm_stat *kvm)
if (perf_evlist__add_pollfd(kvm->evlist, kvm->timerfd) < 0)
goto out;
nr_fds++;
nr_stdin = perf_evlist__add_pollfd(kvm->evlist, fileno(stdin));
if (nr_stdin < 0)
goto out;
nr_fds++;
if (fd_set_nonblock(fileno(stdin)) != 0)
goto out;
pollfds = kvm->evlist->pollfd.entries;
/* everything is good - enable the events and process */
perf_evlist__enable(kvm->evlist);
while (!done) {
struct fdarray *fda = &kvm->evlist->pollfd;
int rc;
rc = perf_kvm__mmap_read(kvm);
@ -957,11 +949,11 @@ static int kvm_events_live_report(struct perf_kvm_stat *kvm)
if (err)
goto out;
if (pollfds[nr_stdin].revents & POLLIN)
if (fda->entries[nr_stdin].revents & POLLIN)
done = perf_kvm__handle_stdin();
if (!rc && !done)
err = poll(pollfds, nr_fds, 100);
err = fdarray__poll(fda, 100);
}
perf_evlist__disable(kvm->evlist);