68 lines
1.7 KiB
PHP
68 lines
1.7 KiB
PHP
<?php
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namespace App\Utils;
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class CpuHelper
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{
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/**
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* 获取 CPU 核心数
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*/
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public static function getCpuCores(): int
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{
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return (int) shell_exec('nproc');
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}
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/**
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* 获取 CPU 使用情况（用户、系统、空闲百分比）
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*/
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public static function getCpuUsage(int $interval = 1): array
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{
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$stat1 = self::readStat();
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sleep($interval);
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$stat2 = self::readStat();
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$diff = [];
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foreach ($stat1 as $key => $value) {
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$diff[$key] = $stat2[$key] - $value;
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}
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$total = array_sum($diff);
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if ($total == 0) {
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return [
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'user' => 0,
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'system' => 0,
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'idle' => 100,
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];
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}
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return [
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'user' => round(($diff['user'] + $diff['nice']) / $total * 100, 2),
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'system' => round($diff['system'] / $total * 100, 2),
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'idle' => round($diff['idle'] / $total * 100, 2),
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];
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}
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/**
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* 读取 /proc/stat 文件中的 CPU 信息
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*/
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private static function readStat(): array
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{
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$fh = fopen('/proc/stat', 'r');
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$line = fgets($fh);
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fclose($fh);
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$parts = preg_split('/\s+/', trim($line));
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// /proc/stat 第一行示例:
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// cpu 3357 0 4313 1362393 0 0 0
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return [
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'user' => (int) $parts[1],
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'nice' => (int) $parts[2],
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'system' => (int) $parts[3],
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'idle' => (int) $parts[4],
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'iowait' => (int) ($parts[5] ?? 0),
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'irq' => (int) ($parts[6] ?? 0),
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'softirq'=> (int) ($parts[7] ?? 0),
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];
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}
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}
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