Page faults hurt sound quality
Page faults hurt sound quality
- Subject: Page faults hurt sound quality
- From: Jeremy Sagan <email@hidden>
- Date: Sun, 12 Oct 2003 12:08:37 -0400
In March 11 2002, Herbie Robinson wrote a very useful and detailed post
on this list entitled 'Wired Memory Utilities' in which he outlines 3
different ways to use wired memory in OS X. To the best of my knowledge
there is no Apple official documentation on the correct way for hosts
and plug-ins to handle the issue of page-faults in audio applications.
Since plug-ins like samplers use very large chunks of memory is it the
plug-ins responsibility to wire its memory? Is it even possible,
running in user space? Should hosts use the task-wire call before
loading plug-ins?
It has been brought to my attention that page-ins seem much more
prevalent in Panther than they did in Jaguar. In either case a page
fault in the audio thread will cause a glitch.
Thanks,
Jeremy
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