/**
* Returns the average CPU over the past Nx
* N = number of units
* x = unit (minutes, hours, days, years, etc)
*
* @example average_cpu("-5 minutes")
* @param String $ago
* @return Float
**/
function averages($deployment_id)
{
global $table;
$ago = str_to_ticks("-5 minutes");
$one_min = str_to_ticks("-1 minute");
$info = '';
try {
$filter = "DeploymentId eq '{$deployment_id}' and Role eq 'WebRole' and PartitionKey gt '0{$ago}'";
//$filter = "Role eq 'WebRole'";
//$filter = '';
//echo "\nFilter: $filter";
$info = $table->retrieveEntities('WADPerformanceCountersTable', $filter);
} catch (Exception $e) {
echo "\nAn error ocurred while retrieving the entities";
}
$sum = 0;
$i = 0;
$x = 0;
$total_cons = 0;
$role_cons = array();
$rx = array();
//var_dump($info);
foreach ($info as $c) {
//echo "\nChecking " . $c->CounterName . " with " . $c->CounterValue;
if ($c->CounterName == '\\Processor(_Total)\\% Processor Time') {
//echo "\nChecking " . $c->CounterName . " with " . $c->CounterValue;
$sum += $c->CounterValue;
$i++;
}
if ($c->CounterName == '\\TCPv4\\Connections Established') {
//echo "\nChecking " . $c->CounterName . " with " . $c->CounterValue;
$total_cons += $c->CounterValue;
if (!isset($role_cons[$c->RoleInstance])) {
$role_cons[$c->RoleInstance] = $c->CounterValue;
} else {
$role_cons[$c->RoleInstance] += $c->CounterValue;
}
if (!isset($rx[$c->RoleInstance])) {
$rx[$c->RoleInstance] = 1;
} else {
$rx[$c->RoleInstance] += 1;
}
$x++;
}
}
$overall_role_avg = 0;
$rc = 0;
$ravg = 0;
foreach ($role_cons as $k => $v) {
$role_cons[$k] = $v / $rx[$k];
$ravg += $role_cons[$k];
$rc++;
}
$total_cons = $ravg;
$ravg = $ravg / $rc;
$arr = array('cpu' => $sum / $i, 'total_connections' => $total_cons, 'avg_connections_per_role' => $ravg, 'roles' => $role_cons);
//print_r($arr);
return $arr;
}
/**
* Retrieves all of the performance metric data over the $ago period
*
* @param String $ago - Default: -5 minutes- Any valid Date/Time string
* @return Object Array
*/
function get_metrics($deployment_id, $ago = "-15 minutes")
{
global $table;
// get DateTime.Ticks in past
$ago = str_to_ticks($ago);
// build query
$filter = "DeploymentId eq '{$deployment_id}' and Role eq 'WebRole' and PartitionKey gt '0{$ago}'";
$filter = '';
// run query
$metrics = $table->retrieveEntities('WADPerformanceCountersTable', $filter);
$arr = array();
foreach ($metrics as $m) {
// Global totals
$arr['totals'][$m->countername]['count'] = !isset($arr['totals'][$m->countername]['count']) ? 1 : $arr['totals'][$m->countername]['count'] + 1;
$arr['totals'][$m->countername]['total'] = !isset($arr['totals'][$m->countername]['total']) ? $m->countervalue : $arr['totals'][$m->countername]['total'] + $m->countervalue;
$arr['totals'][$m->countername]['average'] = !isset($arr['totals'][$m->countername]['average']) ? $m->countervalue : $arr['totals'][$m->countername]['total'] / $arr['totals'][$m->countername]['count'];
// Totals by instance
$arr[$m->roleinstance][$m->countername]['count'] = !isset($arr[$m->roleinstance][$m->countername]['count']) ? 1 : $arr[$m->roleinstance][$m->countername]['count'] + 1;
$arr[$m->roleinstance][$m->countername]['total'] = !isset($arr[$m->roleinstance][$m->countername]['total']) ? $m->countervalue : $arr[$m->roleinstance][$m->countername]['total'] + $m->countervalue;
$arr[$m->roleinstance][$m->countername]['average'] = !isset($arr[$m->roleinstance][$m->countername]['average']) ? $m->countervalue : $arr[$m->roleinstance][$m->countername]['total'] / $arr[$m->roleinstance][$m->countername]['count'];
}
return $arr;
}
