PHP 5.4.31 Released

getrusage

(PHP 4, PHP 5)

getrusageGets the current resource usages

Descrierea

array getrusage ([ int $who = 0 ] )

This is an interface to getrusage(2). It gets data returned from the system call.

Parametri

who

If who is 1, getrusage will be called with RUSAGE_CHILDREN.

Valorile întoarse

Returns an associative array containing the data returned from the system call. All entries are accessible by using their documented field names.

Exemple

Example #1 getrusage() example

<?php
$dat 
getrusage();
echo 
$dat["ru_nswap"];         // number of swaps
echo $dat["ru_majflt"];        // number of page faults
echo $dat["ru_utime.tv_sec"];  // user time used (seconds)
echo $dat["ru_utime.tv_usec"]; // user time used (microseconds)
?>

Note

Notă: Această funcție nu este implementată pe platformele Windows.

Vedeți de asemenea

  • Your system's man page on getrusage(2)

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User Contributed Notes 1 note

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2
Domas Mituzas
6 years ago
getrusage() reports kernel counters that are updated only once application loses context and a switch to kernel space happens. For example on modern Linux server kernels that would mean that getrusage() calls would return information rounded at 10ms, desktop kernels - at 1ms.

getrusage() isn't usable for micro-measurements at all - and getmicrotime(true) might be much more valuable resource.
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