Messages in this thread | | | Subject | Re: Dual core Athlons and unsynced TSCs | From | Andi Kleen <> | Date | 16 Jan 2006 02:19:27 +0100 |
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john stultz <johnstul@us.ibm.com> writes: > > With 2.6.15 on x86-64: > If available, alternate timesources (HPET, ACPI PM) will be used if > available on AMD SMP systems. (clock= is i386 only)
It would be good if it worked on x86-64 too - simply to unconfuse people. It's somewhere on my todo list, but patches welcome.
> With 2.6.15 on i386: > If CONFIG_X86_PM_TIMER is enabled, and available it is the preferred > clocksource over the TSC. Some distros have changed this priority > causing the TSC to be preferred. In these cases clock=pmtmr is needed.
One problem is that it is not obvious enough to people that CONFIG_X86_PM_TIMER is really needed for correct timing on many system and they just don't enable it. That is why we got so many bogus reports.
I just changed it on x86-64 to be dependent on EMBEDDED, on by default. i386 probably should do this change too.
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