Messages in this thread | | | From | Andi Kleen <> | Subject | Re: [patch-mm 14/33] x86_64: Consolidate tsc calibration | Date | Tue, 17 Jul 2007 14:51:23 +0200 |
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On Sunday 15 July 2007 18:10:55 Thomas Gleixner wrote: > Move the TSC calibration code to tsc.c. Reimplement it so the > pm timer can be used as a reference as well.
Why is the pm timer better than the PIT for this?
I've had mixed success with the pmtimer too.
> > Index: linux-2.6.22-rc6-mm/include/asm-i386/tsc.h > =================================================================== > --- linux-2.6.22-rc6-mm.orig/include/asm-i386/tsc.h 2007-07-15 17:26:45.000000000 +0200 > +++ linux-2.6.22-rc6-mm/include/asm-i386/tsc.h 2007-07-15 17:34:42.000000000 +0200 > @@ -71,4 +71,8 @@ extern void init_tsc_clocksource(void); > extern void check_tsc_sync_source(int cpu); > extern void check_tsc_sync_target(void); > > +#ifdef CONFIG_X86_64 > +extern void tsc_calibrate(void); > +#endif
The ifdef shouldn't be needed?
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