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https://github.com/Cacti/cacti.git
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Thomas Vincent
8221a941a7
* perf: add disposable browser and SQL/RRD profiling Signed-off-by: Thomas Vincent <thomasvincent@gmail.com> * docs: record profiling harness in the changelog Signed-off-by: Thomas Vincent <thomasvincent@gmail.com> --------- Signed-off-by: Thomas Vincent <thomasvincent@gmail.com>
104 lines
4.0 KiB
PHP
104 lines
4.0 KiB
PHP
<?php
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// Copyright (C) 2004-2026 The Cacti Group. GPL-2.0-or-later.
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require __DIR__ . '/profile-bootstrap.php';
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$scenario = $argv[1] ?? '';
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profile_check(in_array($scenario, ['render', 'boost'], true), 'Use render or boost.');
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$fixture = json_decode(file_get_contents('/profiles/fixture.json'), true, 512, JSON_THROW_ON_ERROR);
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$samples = [];
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function profile_io(): ?array {
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$path = '/sys/fs/cgroup/io.stat';
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if (!is_readable($path)) {
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return null;
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}
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$devices = [];
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foreach (file($path, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES) as $line) {
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$fields = explode(' ', $line);
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$device = array_shift($fields);
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foreach ($fields as $field) {
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[$name, $value] = explode('=', $field, 2);
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$devices[$device][$name] = (int) $value;
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}
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}
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return $devices;
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}
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if ($scenario === 'boost') {
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set_config_option('boost_rrd_update_enable', 'on');
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set_config_option('boost_rrd_update_system_enable', 'on');
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}
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// Separate process per scenario. The first pass has cold application caches;
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// later passes reuse them. Neither pass flushes the OS or database page cache.
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for ($pass = 0; $pass < 4; $pass++) {
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if ($scenario === 'boost') {
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for ($id = 1; $id <= 50; $id++) {
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db_execute_prepared('INSERT INTO poller_output_boost (local_data_id, rrd_name, time, output) VALUES (?, ?, FROM_UNIXTIME(?), ?)',
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[$id, 'value', $fixture['end'] + ($pass + 1) * 300, (string) (30 + $id)]);
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}
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}
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$usage = getrusage();
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$child_usage = getrusage(1);
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$io = profile_io();
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$start = hrtime(true);
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$bytes = 0;
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for ($id = 1; $id <= 50; $id++) {
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$options = ['graph_start' => $fixture['start'], 'graph_end' => $fixture['end'], 'image_format' => 'png'];
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$meta = [];
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$output = rrdtool_function_graph($id, 0, $options, null, $meta, 1);
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profile_check(is_string($output) && str_starts_with($output, "\x89PNG\r\n\x1a\n"), 'Graph ' . $id . ' did not render a PNG.');
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$bytes += strlen($output);
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}
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$after = getrusage();
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$child_after = getrusage(1);
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$io_after = profile_io();
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$io_delta = null;
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if ($io !== null && $io_after !== null) {
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$io_delta = [];
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foreach ($io_after as $device => $fields) {
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foreach ($fields as $name => $value) {
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$io_delta[$device][$name] = $value - ($io[$device][$name] ?? 0);
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}
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}
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}
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$cpu = static fn (array $value, string $type): float => $value['ru_' . $type . '.tv_sec'] + $value['ru_' . $type . '.tv_usec'] / 1000000;
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$samples[] = [
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'pass' => $pass, 'application_cache' => $pass === 0 ? 'cold' : 'warm',
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'elapsed_ms' => (hrtime(true) - $start) / 1000000,
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'php_cpu_ms' => (($cpu($after, 'utime') + $cpu($after, 'stime')) - ($cpu($usage, 'utime') + $cpu($usage, 'stime'))) * 1000,
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'child_cpu_ms' => (($cpu($child_after, 'utime') + $cpu($child_after, 'stime')) - ($cpu($child_usage, 'utime') + $cpu($child_usage, 'stime'))) * 1000,
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'process_max_rss_kb' => $after['ru_maxrss'],
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'container_io_delta_by_device' => $io_delta,
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'peak_memory_bytes' => memory_get_peak_usage(true), 'image_bytes' => $bytes,
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];
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if ($scenario === 'boost') {
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profile_check((int) db_fetch_cell('SELECT COUNT(*) FROM poller_output_boost') === 0, 'Boost left fixture samples unprocessed.');
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for ($id = 1; $id <= 50; $id++) {
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$last = rrdtool_execute(['last', CACTI_PATH_BASE . '/rra/profile_' . $id . '.rrd'], true);
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profile_check((int) trim((string) $last) === $fixture['end'] + ($pass + 1) * 300, 'Boost did not update RRD ' . $id . '.');
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}
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}
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}
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// Browser workloads use the same non-Boost configuration after server profiling.
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if ($scenario === 'boost') {
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set_config_option('boost_rrd_update_enable', '');
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set_config_option('boost_rrd_update_system_enable', '');
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}
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print json_encode([
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'scenario' => $scenario, 'kind' => 'disposable SQL/RRD fixture; no live SNMP', 'graphs_per_pass' => 50,
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'php' => PHP_VERSION, 'xdebug_profile' => function_exists('xdebug_get_profiler_filename') ? basename((string) xdebug_get_profiler_filename()) : null,
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'samples' => $samples,
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], JSON_PRETTY_PRINT | JSON_THROW_ON_ERROR) . "\n";
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