Messages in this thread |  | | Date | Tue, 17 Sep 2002 13:39:33 -0700 (PDT) | Subject | Re: do_gettimeofday vs. rdtsc in the scheduler | From | "David S. Miller" <> |
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From: john stultz <johnstul@us.ibm.com> Date: 17 Sep 2002 13:29:18 -0700
Some NUMA boxes do not have synced TSC, so on those systems your code won't work.
It would have been really nice if x86 had specified a "system tick" register that incremented based upon the system bus cycles and thus were immune the processor rates.
I foresee lots of patches coming which basically are "how does this x86 system provide a stable synchronized tick source". - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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