Commit e366728d authored by Tom Zanussi's avatar Tom Zanussi Committed by Arnaldo Carvalho de Melo

perf/trace/scripting: wakeup-latency script cleanup

Some minor fixes for the wakeup-latency script:

 - Fix nuisance 'use of uninitialized value' warnings

 - Avoid divide-by-zero error

Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
LKML-Reference: <1273466820-9330-5-git-send-email-tzanussi@gmail.com>
Signed-off-by: default avatarTom Zanussi <tzanussi@gmail.com>
Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent e88a4bfb
...@@ -22,8 +22,8 @@ my %last_wakeup; ...@@ -22,8 +22,8 @@ my %last_wakeup;
my $max_wakeup_latency; my $max_wakeup_latency;
my $min_wakeup_latency; my $min_wakeup_latency;
my $total_wakeup_latency; my $total_wakeup_latency = 0;
my $total_wakeups; my $total_wakeups = 0;
sub sched::sched_switch sub sched::sched_switch
{ {
...@@ -67,8 +67,12 @@ sub trace_end ...@@ -67,8 +67,12 @@ sub trace_end
{ {
printf("wakeup_latency stats:\n\n"); printf("wakeup_latency stats:\n\n");
print "total_wakeups: $total_wakeups\n"; print "total_wakeups: $total_wakeups\n";
printf("avg_wakeup_latency (ns): %u\n", if ($total_wakeups) {
avg($total_wakeup_latency, $total_wakeups)); printf("avg_wakeup_latency (ns): %u\n",
avg($total_wakeup_latency, $total_wakeups));
} else {
printf("avg_wakeup_latency (ns): N/A\n");
}
printf("min_wakeup_latency (ns): %u\n", $min_wakeup_latency); printf("min_wakeup_latency (ns): %u\n", $min_wakeup_latency);
printf("max_wakeup_latency (ns): %u\n", $max_wakeup_latency); printf("max_wakeup_latency (ns): %u\n", $max_wakeup_latency);
......
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