No subject


Fri Sep 18 15:31:18 CDT 2009


drivers, or hardware. Switching backends around shows vastly different times to
do the actual mixing (measured in real-time; Pulse stays under 10ms, while OSS
gets up to 20 to 30 and ALSA spikes to 130, on occasion).. and this is
completely backend-independent code, handling the same scene. The spikes are
not related to the audio processing being done.

If I had to make a guess at the cause, I would say something OpenGL (not AL)
does in these scenes is causing spurious wake-ups with ALSA, stalling the
thread that's mixing. The mixing is done while the lib is locked, which causes
the main app to be blocked when it tries to make an OpenAL call.

That's only a guess though, and I could be wrong. But I don't see anything
wrong on OpenAL's side.

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