getrusage
(PHP 4, PHP 5, PHP 7, PHP 8)
getrusage — 獲取目前資源使用狀況
說明
getrusage(int
$who = 0): array這是 getrusage(2) 的介面。它返回了呼叫自系統的數據。
參數
-
who -
如果
who是 1，getrusage 會使用RUSAGE_CHILDREN來呼叫。
返回值
返回了一個包含系統返回數據的關聯陣列。所以條目均可通過文件中欄位的名稱來訪問。
範例
示例 #1 getrusage() 例子
<?php
$dat = getrusage();
echo $dat["ru_oublock"]; // number of block output operations
echo $dat["ru_inblock"]; // number of block input operations
echo $dat["ru_msgsnd"]; // number of IPC messages sent
echo $dat["ru_msgrcv"]; // number of IPC messages received
echo $dat["ru_maxrss"]; // maximum resident set size
echo $dat["ru_ixrss"]; // integral shared memory size
echo $dat["ru_idrss"]; // integral unshared data size
echo $dat["ru_minflt"]; // number of page reclaims (soft page faults)
echo $dat["ru_majflt"]; // number of page faults (hard page faults)
echo $dat["ru_nsignals"]; // number of signals received
echo $dat["ru_nvcsw"]; // number of voluntary context switches
echo $dat["ru_nivcsw"]; // number of involuntary context switches
echo $dat["ru_nswap"]; // number of swaps
echo $dat["ru_utime.tv_usec"]; // user time used (microseconds)
echo $dat["ru_utime.tv_sec"]; // user time used (seconds)
echo $dat["ru_stime.tv_usec"]; // system time used (microseconds)
?>
更新日誌
| 版本 | 說明 |
|---|---|
| 7.0.0 | 此函式現在開始支援 Windows。 |
註釋
注意:
在 Windows 上 getrusage() 僅會返回以下型別：
"ru_stime.tv_sec""ru_stime.tv_usec""ru_utime.tv_sec""ru_utime.tv_usec""ru_majflt"(only ifwhoisRUSAGE_SELF)"ru_maxrss"(only ifwhoisRUSAGE_SELF)If getrusage() is called with
whoset to1(RUSAGE_CHILDREN), then resource usage for threads are collected (meaning that internally the function is called withRUSAGE_THREAD).
注意:
在 BeOS 2000，僅會返回以下型別：
"ru_stime.tv_sec""ru_stime.tv_usec""ru_utime.tv_sec""ru_utime.tv_usec"
參見
- 你係統上 getrusage(2) 的 man page