Pratik Prajapati wrote: > I'm doing playback/record with usbaudio on TI musb with ALSA. > > My concern is, in isochronus mode (with CPPI DMA) I see a lot of > interrupts and so ksoftirqd takes up to 30% CPU in addition to Audio > application. And in bulk mode(with CPPI DMA) I see less interrupts and > also ksoftirqd is taking around 15% CPU in addition to the > application. Is there any way by which I can get lesser interrupts in > sochronus mode (with CPPI DMA)? > ... > In each URB musb gets 4 iso_frame_desc, which is fixed by variable > 'static int nrpacks' in usbaudio.c. Then increase that variable; it's a module parameter. (And its default value is larger in more recent kernels.) HTH Clemens -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
