Displaying 2 results from an estimated 2 matches for "highres_timers".
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high_res_timers
2007 Apr 18
1
Use of absolute timeouts for oneshot timers
...le you can work out a constant offset between
the two, and use that for converting a kernel absolute time into a
hypervisor absolute time.
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 switches to highres timer mode. This means that
during boot the kernel's monotonic clock is drifting with respect to the
hypervisor, and all timeouts are unreliable.
Initially I was just computing the kernel-hypervisor offset at boo...
2007 Apr 18
1
Use of absolute timeouts for oneshot timers
...le you can work out a constant offset between
the two, and use that for converting a kernel absolute time into a
hypervisor absolute time.
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 switches to highres timer mode. This means that
during boot the kernel's monotonic clock is drifting with respect to the
hypervisor, and all timeouts are unreliable.
Initially I was just computing the kernel-hypervisor offset at boo...