On 2013-09-14 17:51, Sree Harsha Konduri wrote:
Hello,
I am working on the globaledf scheduler and need to lock the ready queue.
I've implemented the locking using CPU_SMP_lock_Control data structure in
i386.
Since we currently have only the Giant lock it is unnecessary to use
other locking mechanisms. The introduction of fine grained locking will
be a major task.
For a G-EDF scheduler please have a look at:
http://git.rtems.org/rtems/tree/cpukit/score/include/rtems/score/schedulersmpimpl.h
http://git.rtems.org/rtems/tree/cpukit/score/include/rtems/score/schedulerprioritysmp.h
If you use this framework it should be pretty easy to implement a G-EDF
scheduler. You only have to replace the priority queue with the
red-black tree operations.
I just want to make sure that locking in such way will ensure mutual
exclusion to operations of the ready queue.
Thanks,
Sree
--
Sebastian Huber, embedded brains GmbH
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