On Fri, 2007-05-25 at 10:41 +0200, Ingo Molnar wrote: > * William Lee Irwin III <[EMAIL PROTECTED]> wrote: > > > yes, that's what i meant under 'slightly async'. Some AMD CPUs are > > > like that too and sched_clock() now handles that fine. So we should > > > try my patch. > > > > Sorry, then. I took slight to mean something else. In any event I was > > only quantifying things. I've no opinion whatsoever on the impact of > > the code on NUMA-Q, only some recall of its operating characteristics. > > there's no need to apologize at all! Thanks for reminding us about the > time-scale and nature of the TSC drift on NUMAQ. I was worried that > maybe the TSC was totally unusable for some reason - but that's > fortunately not the case. So we now have one quirk less, hopefully :-)
Last I remember, it was totally useless for timekeeping, but was useful for cpu-local time measurements. John, it's still useless for time, right? Does sched_clock() really fix it? -- Dave - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
