# eio_busy

(PECL eio >= 0.0.1dev)

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

### 说明

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

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

### 参数

`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`.

### 返回值

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

### 参见

- eio_nop