Re: complete temporary system lock.
Re: complete temporary system lock.
- Subject: Re: complete temporary system lock.
- From: Bill Stewart <email@hidden>
- Date: Tue, 4 Mar 2003 14:15:42 -0800
There must be a contention between the I/O thread and some other
thread...
the I/O Thread waits for a lock held by another thread.
That other thread is a lower priority thread and won't run because the
RT I/O thread is running and doesn't stop
After 8-10 seconds, eventually(!), the priority of the RT thread is
whacked, it falls below the priority of the thread that is holding the
lock, that thread runs, relinquishes the lock, the I/O thread runs
again and can now continue.
The repetitive audio is the exact symptom that you see with this
problem...
Bill
On Tuesday, March 4, 2003, at 11:59 AM, Daniel Walton wrote:
I am seeing some strange behavior on my Macintosh while running OS X.
I think
that it is in some way related to coreaudio but I can't say for sure.
While using a DefaultAudioOuputUnit or even PortAudio's interface to
CoreAudio
every once in a while the entire machine locks (cursor and everything)
and an
audio buffer is looped exactly 22 times.
the program uses much of the 733mhz G4 processor and CoreAudio sends a
kAudioDeviceProcessorOverload every now and then. On a dual G4
machine, this
problem doesn't seem to occur.
I would suspect dead lock, but the entire computer locks up.
any ideas?
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