Entire Site
Free Trial
Safari Books Online is a digital library providing on-demand subscription access to thousands of learning resources.
- Create BookmarkCreate Bookmark
- Create Note or TagCreate Note or Tag
- DownloadDownload
- PrintPrint
Chapter 16. Efficient I/O Scheduling > Non-Blocking I/O
Non-Blocking I/O
A process is put to sleep when performing I/O for one or more of the following reasons:
A read request must wait for input data to arrive.
A write request must wait until previously written data has been written to the media.
A device must be opened, such as a modem terminal line waiting for a carrier or a FIFO waiting for a reader.
Mandatory locking is enabled on files, causing a wait for locking on a read or a write system call.
