friendica/src/Util/Profiler.php

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<?php
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/**
* @copyright Copyright (C) 2020, Friendica
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
*/
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namespace Friendica\Util;
use Friendica\Core\Config\Cache;
use Friendica\Core\Config\IConfig;
use Friendica\Core\System;
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use Psr\Container\ContainerExceptionInterface;
use Psr\Container\ContainerInterface;
use Psr\Container\NotFoundExceptionInterface;
use Psr\Log\LoggerInterface;
/**
* A class to store profiling data
* It can handle different logging data for specific functions or global performance measures
*
* It stores the data as log entries (@see LoggerInterface)
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*/
class Profiler implements ContainerInterface
{
/**
* @var array The global performance array
*/
private $performance;
/**
* @var array The function specific callstack
*/
private $callstack;
/**
* @var bool True, if the Profiler is enabled
*/
private $enabled;
/**
* @var bool True, if the Profiler should measure the whole rendertime including functions
*/
private $rendertime;
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/**
* True, if the Profiler should measure the whole rendertime including functions
*
* @return bool
*/
public function isRendertime()
{
return $this->rendertime;
}
/**
* Updates the enabling of the current profiler
*
* @param IConfig $config
*/
public function update(IConfig $config)
{
$this->enabled = $config->get('system', 'profiler');
$this->rendertime = $config->get('rendertime', 'callstack');
}
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/**
* @param Cache $configCache The configuration cache
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*/
public function __construct(Cache $configCache)
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{
$this->enabled = $configCache->get('system', 'profiler');
$this->rendertime = $configCache->get('rendertime', 'callstack');
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$this->reset();
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}
/**
* Saves a timestamp for a value - f.e. a call
* Necessary for profiling Friendica
*
* @param int $timestamp the Timestamp
* @param string $value A value to profile
* @param string $callstack A callstack string, generated if absent
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*/
public function saveTimestamp($timestamp, $value, $callstack = '')
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{
if (!$this->enabled) {
return;
}
$callstack = $callstack ?: System::callstack(4, 1);
$duration = floatval(microtime(true) - $timestamp);
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if (!isset($this->performance[$value])) {
// Prevent ugly E_NOTICE
$this->performance[$value] = 0;
}
$this->performance[$value] += (float) $duration;
$this->performance['marktime'] += (float) $duration;
if (!isset($this->callstack[$value][$callstack])) {
// Prevent ugly E_NOTICE
$this->callstack[$value][$callstack] = 0;
}
$this->callstack[$value][$callstack] += (float) $duration;
}
/**
* Resets the performance and callstack profiling
*/
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public function reset()
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{
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$this->resetPerformance();
$this->resetCallstack();
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}
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/**
* Resets the performance profiling data
*/
public function resetPerformance()
{
$this->performance = [];
$this->performance['start'] = microtime(true);
$this->performance['database'] = 0;
$this->performance['database_write'] = 0;
$this->performance['cache'] = 0;
$this->performance['cache_write'] = 0;
$this->performance['network'] = 0;
$this->performance['file'] = 0;
$this->performance['rendering'] = 0;
$this->performance['parser'] = 0;
$this->performance['marktime'] = 0;
$this->performance['marktime'] = microtime(true);
}
/**
* Resets the callstack profiling data
*/
public function resetCallstack()
{
$this->callstack = [];
$this->callstack['database'] = [];
$this->callstack['database_write'] = [];
$this->callstack['cache'] = [];
$this->callstack['cache_write'] = [];
$this->callstack['network'] = [];
$this->callstack['file'] = [];
$this->callstack['rendering'] = [];
$this->callstack['parser'] = [];
}
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/**
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* Returns the rendertime string
* @param int $limit Minimal limit for displaying the execution duration
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*
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* @return string the rendertime
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*/
public function getRendertimeString(int $limit = 0)
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{
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$output = '';
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if (!$this->enabled || !$this->rendertime) {
return $output;
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}
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if (isset($this->callstack["database"])) {
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$output .= "\nDatabase Read:\n";
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foreach ($this->callstack["database"] as $func => $time) {
$time = round($time, 3);
if ($time > $limit) {
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$output .= $func . ": " . $time . "\n";
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}
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}
}
if (isset($this->callstack["database_write"])) {
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$output .= "\nDatabase Write:\n";
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foreach ($this->callstack["database_write"] as $func => $time) {
$time = round($time, 3);
if ($time > $limit) {
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$output .= $func . ": " . $time . "\n";
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}
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}
}
if (isset($this->callstack["cache"])) {
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$output .= "\nCache Read:\n";
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foreach ($this->callstack["cache"] as $func => $time) {
$time = round($time, 3);
if ($time > $limit) {
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$output .= $func . ": " . $time . "\n";
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}
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}
}
if (isset($this->callstack["cache_write"])) {
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$output .= "\nCache Write:\n";
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foreach ($this->callstack["cache_write"] as $func => $time) {
$time = round($time, 3);
if ($time > $limit) {
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$output .= $func . ": " . $time . "\n";
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}
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}
}
if (isset($this->callstack["network"])) {
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$output .= "\nNetwork:\n";
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foreach ($this->callstack["network"] as $func => $time) {
$time = round($time, 3);
if ($time > $limit) {
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$output .= $func . ": " . $time . "\n";
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}
}
}
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return $output;
}
/**
* Save the current profiling data to a log entry
*
* @param LoggerInterface $logger The logger to save the current log
* @param string $message Additional message for the log
*/
public function saveLog(LoggerInterface $logger, $message = '')
{
$duration = microtime(true) - $this->get('start');
$logger->info(
$message,
[
'action' => 'profiling',
'database_read' => round($this->get('database') - $this->get('database_write'), 3),
'database_write' => round($this->get('database_write'), 3),
'cache_read' => round($this->get('cache'), 3),
'cache_write' => round($this->get('cache_write'), 3),
'network_io' => round($this->get('network'), 2),
'file_io' => round($this->get('file'), 2),
'other_io' => round($duration - ($this->get('database')
+ $this->get('cache') + $this->get('cache_write')
+ $this->get('network') + $this->get('file')), 2),
'total' => round($duration, 2)
]
);
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if ($this->isRendertime()) {
$output = $this->getRendertimeString();
$logger->info($message . ": " . $output, ['action' => 'profiling']);
}
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}
/**
* Finds an entry of the container by its identifier and returns it.
*
* @param string $id Identifier of the entry to look for.
*
* @throws NotFoundExceptionInterface No entry was found for **this** identifier.
* @throws ContainerExceptionInterface Error while retrieving the entry.
*
* @return int Entry.
*/
public function get($id)
{
if (!$this->has($id)) {
return 0;
} else {
return $this->performance[$id];
}
}
/**
* Returns true if the container can return an entry for the given identifier.
* Returns false otherwise.
*
* `has($id)` returning true does not mean that `get($id)` will not throw an exception.
* It does however mean that `get($id)` will not throw a `NotFoundExceptionInterface`.
*
* @param string $id Identifier of the entry to look for.
*
* @return bool
*/
public function has($id)
{
return isset($this->performance[$id]);
}
}