On Tue, Nov 10, 2009 at 09:34:28PM +0200, Jussi Laako wrote: > [email protected] wrote: > > So you're just reading it, not waiting on it ? That indeed > > should be 'free'. > > Yes, we just need to read it. JACK used to use TSC for that, and HPET > support was introduced as similar low-cost alternative to deal with > variable clock frequencies (important on mobile things) and unsynced > TSC. Use of syscalls is kind of fallback. > > Audio hardware (interrupts) act as a waitable time source.
All perfectly logical. But what then is stopping the driver devs from providing just read access to the main counter ? Who could object to read-only access to a device register (if reading it has no side effects) ? Ciao, -- FA Io lo dico sempre: l'Italia รจ troppo stretta e lunga. _______________________________________________ Linux-audio-dev mailing list [email protected] http://lists.linuxaudio.org/mailman/listinfo/linux-audio-dev
