On Thu, 2007-06-21 at 17:06 +0200, Alessio Igor Bogani wrote: > Hi to all, > > Sorry for my poor english. Hey no reason to excuse your self. It's not your fault that you are not a native speaker and that the computer industry has chosen English as the preferred language. I can feel with you :) > 1) What are reliable clocksources? Reliable clock sources are devices, which are: - continuously counting forward - with a constant frequency - have a reasonable wrap around time (at least > 100ms) of the counter > 2) I have a mainboard with a 500 Mhz cpu which works perfectly with RT. > I suppose that the max resolution is 2 ns for the high resolution timers > but a "cat /proc/timer_list" reported: > > .resolution: 1 nsecs <---- > > How it is possible that this mainboard have 1 nsecs resolution? The internal resolution is set to 1 nsec. This does not reflect the hardware capabilities and we might have to think about it, but there are good reasons not to do so, as clock sources and clock event devices - and with them the resolution - can be exchanged on the fly and we do not want to expose changing values to the applications. > Excuse me if it are stupid questions. It's a valid question. No excuse necessary. Thanks, tglx - To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
