>> 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. Are you sure? CONFIG_SND_HRTIMER says: "ALSA uses the hrtimer as a precise timing source. The ALSA sequencer code also can use this timing source." Would ALSA use the sound card interrupt for timing with my USB DAC? - Grant _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
