Messages in this thread | | | Subject | Re: athlon 64 dual core tsc out of sync | From | Lee Revell <> | Date | Sat, 04 Feb 2006 20:00:42 -0500 |
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On Sat, 2006-02-04 at 15:24 -0500, Albert Cahalan wrote: > There have been far too many other problems with i386 timekeeping as > well. Really, it's crazy to not use the pmtmr if the pmtmr is > available. The next best choice would be HPET. After that, pre-SMM > systems should count clock ticks and post-SMM systems should read the > RTC or PIT registers. Until we accept this, we'll always be suffering > clock problems.
Well, I wouldn't say it's crazy - the TSC is several orders of magnitude cheaper than the PM timer, and the only common hardware where it's completely useless are Athlon X2 systems.
Fortunately there's a solution in the works - John Stultz's gettimeofday rework. Try the -rt tree for a preview.
Lee
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