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[edit] Last updated: Fri, 24 May 2013

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getrusage

(PHP 4, PHP 5)

getrusageObtém a utilização de recursos

Descrição

array getrusage ([ int $who ] )

Esta é uma interface para getrusage(2). Ela obtém informação retornada pela chamada do sistema.

Parâmetros

who

Se who é 1, getrusage será chamada com RUSAGE_CHILDREN.

Valor Retornado

Retorna um array associativo contendo a informação retornado pela chamada do sistema. Todas entradas são acessíveis usando os seus documentados nomes de campos.

Exemplos

Exemplo #1 Exemplo da getrusage()

<?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)
?>

Notas

Nota: esta função não é implementada na plataforma Windows

Veja Também

  • Man page do seu sistema em getrusage(2)



add a note add a note User Contributed Notes getrusage - [2 notes]
up
0
Domas Mituzas
5 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.
up
0
php at lavrenko dot pp dot ru
7 years ago
The author of the article mentioned in the previous post says "Once I got a negative value for both times - I have absolutely no clue how that can happen.". This is because time in microseconds is not padded with zeros from the left, therefore, you cannot concatenate the two numbers. Instead, you should normalize the values and then add them up:

$dat["ru_utime.tv_sec"]*1e6+$dat["ru_utime.tv_usec"];

 
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