Messages in this thread | | | Subject | Re: [PATCH] Work around for periodic do_gettimeofday hang | From | Lee Revell <> | Date | Sat, 27 Nov 2004 17:38:40 -0500 |
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On Thu, 2004-11-25 at 09:20 +0100, Arjan van de Ven wrote: > HZ=1000 costs you 1% HPC performance, and for slower machines probably more. Also some hw (with slow smm) really doesn't likeit.
I actually profiled the timer ISR on a 600Mhz C3. It runs for 22 usec. So with HZ=1000 the residency of the timer interrupt is 2.2%.
Lee
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