Linked by Thom Holwerda on Mon 19th Sep 2005 20:33 UTC
In previous Windows releases, the entire audio stack ran in Kernel space. Vista will put an end to this. "The first (and biggest) change we made was to move the entire audio stack out of the kernel and into user mode. Pre-Vista, the audio stack lived in a bunch of different kernel mode device drivers, including sysaudio.sys, kmixer.sys, wdmaud.sys, redbook.sys, etc. In Vista and beyond, the only kernel mode drivers for audio are the actual audio drivers (and portcls.sys, the high level audio port driver)."
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RE[4]: Not a microkernel
by kaiwai on Tue 20th Sep 2005 06:03
in reply to "RE[3]: Not a microkernel"
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2005-08-08
> However, computers have now come to the point that the penalty of contextual switching should be so small, so meaningless
A very small overhead, when called very often, is indeed a big overhead.