On Thu, 2014-12-11 at 21:49 +0900, ê¹?ì ?ì?° wrote: > Dear developers, > > > I have question something about selecting logic between timer-based > and IRQ scheduling. > > When I tried to load 'module-alsa-sink' with 'mmap=0 tsched=1' > parameters, tsched(timer-based scheduling) becomes disabled by below > codes. > > It seems tsched is allowed only mmap supported ALSA devices. Why > tsched disabled while use non-mmap driven ALSA? Because rewinding is not available in non-mmap mode. That is, it's not possible to rewrite previously written data in non-mmap mode. In timer-based scheduling mode PulseAudio uses bigger buffer size, which causes problems if rewinding isn't available. -- Tanu
