On Tue, Nov 30, 2004 at 10:55:07AM -0500, Doug Larrick wrote: > David Engel wrote: > >That's the problem! Try changing the decoder_lock from a QMutext to a > >pthread_mutex_t and see if that helps. I suspect it will, and will > >also get rid of the sched_yield which I didn't like anyway. If you > >can't make the change, I will do it tonight. > > I'll give it a try. I might be able to get to this tonight.
Well, pthread_mutex_t seems to have the same problem as QMutex in that a precess already waiting doesn't get priority over a process that releases, yields and reacquires. :( IOW, the sched_yield is stil needed on UP and probably won't help much on SMP. You can try mutex.patch for yourself if you like. getframe.patch partially implements my return early from NVP::GetFrame suggestion. It's for testing only, but please give it a try. If it works OK, I'll flesh it out. David -- David Engel [EMAIL PROTECTED]
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