30 May
2010
30 May
'10
8:02 p.m.
I have hrtimer
support compiled into my kernel, but when I watch 'top'
while music is playing I can see that 'timer' uses CPU cycles but
'hrtimer' never does. How can I find out if ALSA is using hrtimer?
ALSA uses the sound card interrupt for timing. The hrtimer is used only
for MIDI playback and for sound cards without interrupts, such as the
SuperH, i.MX, PC Speaker, and dummy devices.