Messages in this thread | | | Subject | Re: It hurts when I shoot myself in the foot | From | Austin Gonyou <> | Date | 24 May 2002 11:36:00 -0500 |
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On Fri, 2002-05-24 at 10:36, Kasper Dupont wrote: > Alan Cox wrote: > > > > > If the kernel knew multipliers couldn't it actually use the TSCs > > > anyway? Of course it would take some work, but is there any > > > reason why it would not be posible? > > > > In 2.4 yes. In 2.5 it would be close to impossible due to the pre-empt code > > Couldn't that be solved in one of the following ways? > > 1) Disable pre-emption while reading TSC and CPU nr. > 2) Use affinity for processes pre-empted in kernel mode. > 3) Disable pre-emption for SMP systems. > Sorry to chime in on this if it isn't appreciated, but wouldn't #3 open some old wounds again? It seems that it would FMPOV.
Austin
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