#!/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}++;
}
tools?id=33e962c8871f015f5c8978384553dddcf5b81b22'>tools</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/perf?id=33e962c8871f015f5c8978384553dddcf5b81b22'>perf</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/trace?id=33e962c8871f015f5c8978384553dddcf5b81b22'>trace</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/trace/strace?id=33e962c8871f015f5c8978384553dddcf5b81b22'>strace</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='33e962c8871f015f5c8978384553dddcf5b81b22'/><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>Stanislaw Gruszka &lt;sgruszka@redhat.com&gt;</td><td class='right'>2017-01-29 12:40:52 +0100</td></tr>
<tr><th>committer</th><td>Kalle Valo &lt;kvalo@codeaurora.org&gt;</td><td class='right'>2017-01-31 09:08:52 +0200</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/trace/strace?id=33e962c8871f015f5c8978384553dddcf5b81b22'>33e962c8871f015f5c8978384553dddcf5b81b22</a> (<a href='/cgit.cgi/linux/net-next.git/patch/tools/perf/trace/strace?id=33e962c8871f015f5c8978384553dddcf5b81b22'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=33e962c8871f015f5c8978384553dddcf5b81b22'>43aff96c2ee21d9e0fa2018457778a4de52053cd</a> /<a href='/cgit.cgi/linux/net-next.git/tree/tools/perf/trace/strace?id=33e962c8871f015f5c8978384553dddcf5b81b22'>tools/perf/trace/strace</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/trace/strace?id=575ddce0507789bf9830d089557d2199d2f91865'>575ddce0507789bf9830d089557d2199d2f91865</a> (<a href='/cgit.cgi/linux/net-next.git/diff/tools/perf/trace/strace?id=33e962c8871f015f5c8978384553dddcf5b81b22&amp;id2=575ddce0507789bf9830d089557d2199d2f91865'>diff</a>)</td></tr></table>
<div class='commit-subject'>rt2x00: fix clk_get call</div><div class='commit-msg'>clk_get() takes two arguments and might return ERR_PTR(), so we
have to nullify pointer on that case, to do not break further call
to clk_get_rate().

Reported-by: Felix Fietkau &lt;nbd@nbd.name&gt;
Fixes: 34db70b92fae ("rt2x00: add copy of clk for soc devices")
Signed-off-by: Stanislaw Gruszka &lt;sgruszka@redhat.com&gt;
Signed-off-by: Kalle Valo &lt;kvalo@codeaurora.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=33e962c8871f015f5c8978384553dddcf5b81b22'>Diffstat</a> (limited to 'tools/perf/trace/strace')</div><table summary='diffstat' class='diffstat'>