Linux io
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Linux IO APIs allow processes to read from devices like disks or networks. When a process calls read(2), it sleeps until the read is complete, which can take a long time for disk I/O. However, reads from faster devices like RAM or networks may complete much faster and wake the process sooner.
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Linux io
- 1. Linux IO APIs Mark Veltzer mark@veltzer.net
- 2. The problems with IO APIs ● When you call read(2) your process is put to sleep until the read ends. ● This sleep lasts quite some time since you are not supposed to wake up until the buffer is full and reading from disk takes quite some time. ● If the device you are reading from is not disk, but rather network or RAM file system then the sleep time could be much faster.