Why does this use up about 5% CPU (on my system) (pseude code of course) while (data,size = get_data) { write(/dev/dsp,data,size); } And this only uses about 0%: while (data,size = get_data) { write(/dev/dsp,data,size); usleep(1); } I've also tried replacing the usleep with sched_yield() but that did nothing. Thomas -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/