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Linux IO APIs
Mark Veltzer
mark@veltzer.net
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.

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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.