#!/usr/bin/perl -w
# (c) 2009, Tom Zanussi <tzanussi@gmail.com>
# Licensed under the terms of the GNU GPL License version 2

# Display avg/min/max wakeup latency

# The common_* event handler fields are the most useful fields common to
# all events.  They don't necessarily correspond to the 'common_*' fields
# in the status files.  Those fields not available as handler params can
# be retrieved via script functions of the form get_common_*().

use 5.010000;
use strict;
use warnings;

use lib "$ENV{'PERF_EXEC_PATH'}/scripts/perl/Perf-Trace-Util/lib";
use lib "./Perf-Trace-Util/lib";
use Perf::Trace::Core;
use Perf::Trace::Util;

my %last_wakeup;

my $max_wakeup_latency;
my $min_wakeup_latency;
my $total_wakeup_latency = 0;
my $total_wakeups = 0;

sub sched::sched_switch
{
    my ($event_name, $context, $common_cpu, $common_secs, $common_nsecs,
	$common_pid, $common_comm,
	$prev_comm, $prev_pid, $prev_prio, $prev_state, $next_comm, $next_pid,
	$next_prio) = @_;

    my $wakeup_ts = $last_wakeup{$common_cpu}{ts};
    if ($wakeup_ts) {
	my $switch_ts = nsecs($common_secs, $common_nsecs);
	my $wakeup_latency = $switch_ts - $wakeup_ts;
	if ($wakeup_latency > $max_wakeup_latency) {
	    $max_wakeup_latency = $wakeup_latency;
	}
	if ($wakeup_latency < $min_wakeup_latency) {
	    $min_wakeup_latency = $wakeup_latency;
	}
	$total_wakeup_latency += $wakeup_latency;
	$total_wakeups++;
    }
    $last_wakeup{$common_cpu}{ts} = 0;
}

sub sched::sched_wakeup
{
    my ($event_name, $context, $common_cpu, $common_secs, $common_nsecs,
	$common_pid, $common_comm,
	$comm, $pid, $prio, $success, $target_cpu) = @_;

    $last_wakeup{$target_cpu}{ts} = nsecs($common_secs, $common_nsecs);
}

sub trace_begin
{
    $min_wakeup_latency = 1000000000;
    $max_wakeup_latency = 0;
}

sub trace_end
{
    printf("wakeup_latency stats:\n\n");
    print "total_wakeups: $total_wakeups\n";
    if ($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("max_wakeup_latency (ns): %u\n", $max_wakeup_latency);

    print_unhandled();
}

my %unhandled;

sub print_unhandled
{
    if ((scalar keys %unhandled) == 0) {
	return;
    }

    print "\nunhandled events:\n\n";

    printf("%-40s  %10s\n", "event", "count");
    printf("%-40s  %10s\n", "----------------------------------------",
	   "-----------");

    foreach my $event_name (keys %unhandled) {
	printf("%-40s  %10d\n", $event_name, $unhandled{$event_name});
    }
}

sub trace_unhandled
{
    my ($event_name, $context, $common_cpu, $common_secs, $common_nsecs,
	$common_pid, $common_comm) = @_;

    $unhandled{$event_name}++;
}
s='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=751321b3dd5040dc5be19bd23f985e80c914621a'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools?id=751321b3dd5040dc5be19bd23f985e80c914621a'>tools</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/testing?id=751321b3dd5040dc5be19bd23f985e80c914621a'>testing</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/testing/selftests?id=751321b3dd5040dc5be19bd23f985e80c914621a'>selftests</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/testing/selftests/ftrace?id=751321b3dd5040dc5be19bd23f985e80c914621a'>ftrace</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/testing/selftests/ftrace/test.d?id=751321b3dd5040dc5be19bd23f985e80c914621a'>test.d</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='751321b3dd5040dc5be19bd23f985e80c914621a'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-30 13:18:12 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-30 13:18:12 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/testing/selftests/ftrace/test.d?id=751321b3dd5040dc5be19bd23f985e80c914621a'>751321b3dd5040dc5be19bd23f985e80c914621a</a> (<a href='/cgit.cgi/linux/net-next.git/patch/tools/testing/selftests/ftrace/test.d?id=751321b3dd5040dc5be19bd23f985e80c914621a'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=751321b3dd5040dc5be19bd23f985e80c914621a'>967928e24b38dc7fed918f932bb1b243af42bf7f</a> /<a href='/cgit.cgi/linux/net-next.git/tree/tools/testing/selftests/ftrace/test.d?id=751321b3dd5040dc5be19bd23f985e80c914621a'>tools/testing/selftests/ftrace/test.d</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/testing/selftests/ftrace/test.d?id=566cf877a1fcb6d6dc0126b076aad062054c2637'>566cf877a1fcb6d6dc0126b076aad062054c2637</a> (<a href='/cgit.cgi/linux/net-next.git/diff/tools/testing/selftests/ftrace/test.d?id=751321b3dd5040dc5be19bd23f985e80c914621a&amp;id2=566cf877a1fcb6d6dc0126b076aad062054c2637'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/testing/selftests/ftrace/test.d?id=586655d278ba08af7b198b93217746f9a506ee8a'>586655d278ba08af7b198b93217746f9a506ee8a</a> (<a href='/cgit.cgi/linux/net-next.git/diff/tools/testing/selftests/ftrace/test.d?id=751321b3dd5040dc5be19bd23f985e80c914621a&amp;id2=586655d278ba08af7b198b93217746f9a506ee8a'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge tag 'rtc-4.10-2' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux</div><div class='commit-msg'>Pull RTC fix from Alexandre Belloni:
 "A single fix for this cycle. It is worth taking it for 4.10 so that
  distributions will not have CONFIG_RTC_DRV_JZ4740 switching from m to
  y in their config.

  Summary:
   - Allow jz4740 to build as a module again by using kernel_halt()"

* tag 'rtc-4.10-2' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux:
  rtc: jz4740: make the driver buildable as a module again
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=751321b3dd5040dc5be19bd23f985e80c914621a'>Diffstat</a> (limited to 'tools/testing/selftests/ftrace/test.d')</div><table summary='diffstat' class='diffstat'>