public function testParseMeminfo()
{
$tests = array('meminfo.ubuntu14.txt' => array('total' => 7843336192, 'free' => 3758297088));
$dir = dirname(__FILE__) . '/memory';
foreach ($tests as $input => $expect) {
$raw = Filesystem::readFile($dir . '/' . $input);
$actual = PhutilSystem::parseMemInfo($raw);
$this->assertEqual($expect, $actual, pht('Parse of "%s".', $input));
}
}
public function updateAutoscale()
{
if ($this->inGracefulShutdown) {
return;
}
foreach ($this->autoscale as $group => $daemons) {
$scaleup_duration = $this->getAutoscaleProperty($group, 'up', 2);
$max_pool_size = $this->getAutoscaleProperty($group, 'pool', 8);
$reserve = $this->getAutoscaleProperty($group, 'reserve', 0);
// Don't scale a group if it is already at the maximum pool size.
if (count($daemons) >= $max_pool_size) {
continue;
}
$should_scale = true;
foreach ($daemons as $daemon_id => $ignored) {
$busy = idx($this->daemons[$daemon_id], 'busy');
if (!$busy) {
// At least one daemon in the group hasn't reported that it has
// started work.
$should_scale = false;
break;
}
if (time() - $busy < $scaleup_duration) {
// At least one daemon in the group was idle recently, so we have
// not fullly
$should_scale = false;
break;
}
}
// If we have a configured memory reserve for this pool, it tells us that
// we should not scale up unless there's at least that much memory left
// on the system (for example, a reserve of 0.25 means that 25% of system
// memory must be free to autoscale).
if ($should_scale && $reserve) {
// On some systems this may be slightly more expensive than other
// checks, so only do it once we're prepared to scale up.
$memory = PhutilSystem::getSystemMemoryInformation();
$free_ratio = $memory['free'] / $memory['total'];
// If we don't have enough free memory, don't scale.
if ($free_ratio <= $reserve) {
continue;
}
}
if ($should_scale) {
$config = $this->autoscaleConfig[$group];
$config['autoscale']['clone'] = true;
$clone = new PhutilDaemonHandle($this, $config['class'], $this->argv, array('log' => $this->log, 'argv' => $config['argv'], 'load' => $this->libraries, 'autoscale' => $config['autoscale']));
$this->logMessage('AUTO', pht('Scaling pool "%s" up to %s daemon(s).', $group, new PhutilNumber(count($daemons) + 1)));
$this->addDaemon($clone, $config);
// Don't scale more than one pool up per iteration. Otherwise, we could
// break the memory barrier if we have a lot of pools and scale them
// all up at once.
return;
}
}
}
