pcntl_getcpuaffinity

(PHP 8 >= 8.4.0)

pcntl_getcpuaffinity — Get the cpu affinity of a process

pcntl_getcpuaffinity(?int $pid = null): bool|array

Retrieve the cpu affinity of the pid.

Returns the cpu affinity mask of the process, 或者在失败时返回 false.

警告

此函数可能返回布尔值 false，但也可能返回等同于 false 的非布尔值。请阅读布尔类型章节以获取更多信息。应使用 === 运算符来测试此函数的返回值。

A ValueError is thrown when pid is an invalid process id or the cpu mask had failed to be created.

If pid is a process for which the current user has no allowed permission, a E_WARNING is emitted.

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