eio_busy

(PECL eio >= 0.0.1dev)

eio_busy — Artificially increase load. Could be useful in tests, benchmarking.

resource eio_busy ( int $delay [, int $pri = EIO_PRI_DEFAULT [, callable $callback = NULL [, mixed $data = NULL ]]] )

eio_busy() artificially increases load taking delay seconds to execute. May be used for debugging, or benchmarking.

delay: Delay in seconds
pri: 请求的优先级：EIO_PRI_DEFAULT，EIO_PRI_MIN，EIO_PRI_MAX 或 NULL。如果是 NULL，pri 将设为 EIO_PRI_DEFAULT。
callback: This callback is called when all the group requests are done.
data: Arbitrary variable passed to callback.

eio_busy() returns request resource on success or FALSE on error.