On Sat, 2007-03-10 at 16:42 -0800, Jeremy Fitzhardinge wrote:
> Thomas Gleixner wrote:
> > It's simply enforced in NO_HZ, HIGHRES mode as we operate in absolute
> > time, which is read back from the clocksource, even if we use a relative
> > value for real hardware clock event devices to program
On Sat, 2007-03-10 at 16:42 -0800, Jeremy Fitzhardinge wrote:
Thomas Gleixner wrote:
It's simply enforced in NO_HZ, HIGHRES mode as we operate in absolute
time, which is read back from the clocksource, even if we use a relative
value for real hardware clock event devices to program the next
Thomas Gleixner wrote:
> It's simply enforced in NO_HZ, HIGHRES mode as we operate in absolute
> time, which is read back from the clocksource, even if we use a relative
> value for real hardware clock event devices to program the next event.
> We calculate the delta between the absolute event and
Thomas Gleixner wrote:
> The clocksource is not used until the clocksource is installed. Also the
> periodic mode during boot, when the clock event device supports periodic
> mode, is not reading the time. It relies on the clock event device
> getting it straight.
Yes. This could be one source
On Sat, 2007-03-10 at 14:52 -0800, Jeremy Fitzhardinge wrote:
> When booting under Xen, you'll get this if you're using both the xen
> clocksource and clockevent drivers. However, it seems that during boot
> on a NO_HZ HIGHRES_TIMERS system, the kernel does not use the Xen
> clocksource until it
On Sat, 2007-03-10 at 14:52 -0800, Jeremy Fitzhardinge wrote:
When booting under Xen, you'll get this if you're using both the xen
clocksource and clockevent drivers. However, it seems that during boot
on a NO_HZ HIGHRES_TIMERS system, the kernel does not use the Xen
clocksource until it
Thomas Gleixner wrote:
The clocksource is not used until the clocksource is installed. Also the
periodic mode during boot, when the clock event device supports periodic
mode, is not reading the time. It relies on the clock event device
getting it straight.
Yes. This could be one source of
Thomas Gleixner wrote:
It's simply enforced in NO_HZ, HIGHRES mode as we operate in absolute
time, which is read back from the clocksource, even if we use a relative
value for real hardware clock event devices to program the next event.
We calculate the delta between the absolute event and
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