/**
* Get the relative offset for the video capture (in milliseconds).
* This is the time between the first non-timeline event and the
* last paint or rasterize event prior to it.
*
* @param mixed $testPath
* @param mixed $run
* @param mixed $cached
*/
function DevToolsGetVideoOffset($testPath, $run, $cached, &$endTime)
{
$offset = 0;
$endTime = 0;
$lastEvent = 0;
$cachedText = '';
if ($cached) {
$cachedText = '_Cached';
}
$devToolsFile = "{$testPath}/{$run}{$cachedText}_devtools.json";
if (gz_is_file($devToolsFile)) {
$events = json_decode(gz_file_get_contents($devToolsFile), true);
if (is_array($events)) {
$lastPaint = 0;
$startTime = 0;
foreach ($events as &$event) {
if (is_array($event) && array_key_exists('method', $event)) {
$method_class = substr($event['method'], 0, strpos($event['method'], '.'));
// calculate the start time stuff
if ($method_class === 'Timeline') {
$encoded = json_encode($event);
$eventTime = DevToolsEventEndTime($event);
if ($eventTime && (!$startTime || $eventTime <= $startTime) && (!$lastPaint || $eventTime > $lastPaint)) {
if (strpos($encoded, '"type":"ResourceSendRequest"') !== false) {
$startTime = DevToolsEventTime($event);
}
if (strpos($encoded, '"type":"Rasterize"') !== false || strpos($encoded, '"type":"CompositeLayers"') !== false || strpos($encoded, '"type":"Paint"') !== false) {
$lastPaint = $eventTime;
}
}
if ($eventTime > $lastEvent && strpos($encoded, '"type":"Resource') !== false) {
$lastEvent = $eventTime;
}
}
}
}
}
}
if ($startTime && $lastPaint && $lastPaint < $startTime) {
$offset = round($startTime - $lastPaint);
}
if ($startTime && $lastEvent && $lastEvent > $startTime) {
$endTime = ceil($lastEvent - $startTime);
}
return $offset;
}
/**
* If we have a timeline, figure out what each thread was doing at each point in time.
* Basically CPU utilization from the timeline.
*
* returns an array of threads with each thread being an array of slices (one for
* each time period). Each slice is an array of events and the fraction of that
* slice that they consumed (with a total maximum of 1 for any slice).
*/
function DevToolsGetCPUSlices($testPath, $run, $cached)
{
$count = 0;
$slices = null;
$devTools = array();
$startOffset = null;
$ver = 1;
$cacheFile = "{$testPath}/{$run}.{$cached}.devToolsCPUSlices.{$ver}";
if (gz_is_file($cacheFile)) {
$slices = json_decode(gz_file_get_contents($cacheFile), true);
}
if (!isset($slices)) {
GetTimeline($testPath, $run, $cached, $devTools, $startOffset);
if (isset($devTools) && is_array($devTools) && count($devTools)) {
// Do a first pass to get the start and end times as well as the number of threads
$threads = array(0 => true);
$startTime = 0;
$endTime = 0;
foreach ($devTools as &$entry) {
if (isset($entry['method']) && $entry['method'] == 'Timeline.eventRecorded' && isset($entry['params']['record'])) {
$start = DevToolsEventTime($entry);
if ($start && (!$startTime || $start < $startTime)) {
$startTime = $start;
}
$end = DevToolsEventEndTime($entry);
if ($end && (!$endTime || $end > $endTime)) {
$endTime = $end;
}
$thread = isset($entry['params']['record']['thread']) ? $entry['params']['record']['thread'] : 0;
$threads[$thread] = true;
}
}
// create time slice arrays for each thread
$slices = array();
foreach ($threads as $id => $bogus) {
$slices[$id] = array();
}
// create 1ms time slices for the full time
if ($endTime > $startTime) {
$startTime = floor($startTime);
$endTime = ceil($endTime);
for ($i = $startTime; $i <= $endTime; $i++) {
$ms = intval($i - $startTime);
foreach ($threads as $id => $bogus) {
$slices[$id][$ms] = array();
}
}
// Go through each element and account for the time
foreach ($devTools as &$entry) {
if (isset($entry['method']) && $entry['method'] == 'Timeline.eventRecorded' && isset($entry['params']['record'])) {
$count += DevToolsGetEventTimes($entry['params']['record'], $startTime, $slices);
}
}
}
}
if ($count) {
// remove any threads that didn't have actual slices populated
$emptyThreads = array();
foreach ($slices as $thread => &$records) {
$is_empty = true;
foreach ($records as $ms => &$values) {
if (count($values)) {
$is_empty = false;
break;
}
}
if ($is_empty) {
$emptyThreads[] = $thread;
}
}
if (count($emptyThreads)) {
foreach ($emptyThreads as $thread) {
unset($slices[$thread]);
}
}
gz_file_put_contents($cacheFile, json_encode($slices));
} else {
$slices = null;
}
}
return $slices;
}
