(PHP 4, PHP 5, PHP 7)
getrusage — 获取当前资源使用状况
$who = 0
] ) : array这是 getrusage(2) 的接口。它返回了调用自系统的数据。
who
如果 who 是 1，getrusage 会使用
RUSAGE_CHILDREN 来调用。
返回了一个包含系统返回数据的关联数组。所以条目均可通过文档中字段的名称来访问。
Example #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)
?>
| 版本 | 说明 |
|---|---|
| 7.0.0 | 此函数现在开始支持 Windows。 |
Note:
在 Windows 上 getrusage() 仅会返回以下类型：
- "ru_stime.tv_sec"
- "ru_stime.tv_usec"
- "ru_utime.tv_sec"
- "ru_utime.tv_usec"
- "ru_majflt" (only if
whoisRUSAGE_SELF)- "ru_maxrss" (only if
whoisRUSAGE_SELF)If getrusage() is called with
whoset to 1 (RUSAGE_CHILDREN), then resource usage for threads are collected (meaning that internally the function is called withRUSAGE_THREAD).
Note:
在 BeOS 2000，仅会返回以下类型：
- "ru_stime.tv_sec"
- "ru_stime.tv_usec"
- "ru_utime.tv_sec"
- "ru_utime.tv_usec"