Messages in this thread |  | | From | Andi Kleen <> | Subject | Re: [patch 9/9] Make use of the Master Timer | Date | Fri, 2 Feb 2007 08:05:15 +0100 |
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> > Hmm, I wasn't sure. Why is it needed? How outdated can the > > result of RDTSC / RDTSCP be? > > > > If I do: > > rdtscll(a) > > ... > > rdtscll(b) > > is it guaranteed that (b > a) ? > > On a single CPU this is always guaranteed. Even on AMD.
It's not guaranteed on Intel at least (but happens to work on P4)
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