On Wed, 27 Apr 2011, Vikram Narayanan wrote:

On Wed, Apr 27, 2011 at 2:07 AM, Russell King - ARM Linux

quoted

The only way to have a stable time source is to have a stable clocksource
- one which is never stopped or otherwise messed around with. ?If you
try to combine clocksource and clockevent with one-shot mode, where
the clocksource part is reset each time a new event is set, you'll probably
soon end up with time going screwy.

Thanks for the insight.
My another question is that, where can I find some examples of dynamic
tick implementation. Are there any documents for implementing the
functionality?
Also the struct dyn_tick_timer in the file include/asm-arm/mach/time.h
is removed since 2.6.27. So how do I achieve this?
If you refer me to some documentation on this, that would be great.

Provide a functional clocksource plus a clockevent device which is
oneshot capable. Enable CONFIG_NOHZ and there you go.

Thanks,

	tglx