Linux Journal: Test of the Preemptible Kernel Patch
Oct 28, 2002, 16:47 (2 Talkback[s])
(Other stories by Andrew Webber)
Linux was originally written as a general-purpose operating
system without any consideration for real-time applications.
Recently Linux has become attractive to the real-time community due
to its low cost and open standards. In order to make it more
practical for the real-time community, patches have been written to
affect such things as interrupt latency and context switch. These
patches are public domain and are becoming part of the main Linux
This article talks about one of these patches, the preemptible
kernel patch, and its effect on the interrupt latency of a Linux
system. The patch reduces the measured interrupt latency of the
system, making it more appropriate for real-time applications.