Messages in this thread |  | | Date | Sat, 14 Sep 2002 00:46:06 +0200 | From | Pavel Machek <> | Subject | Re: LMbench2.0 results |
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Hi!
> > > > Comments? > > > > > > Yeah: "ouch" because I don't see a single category that's faster. > > > > HZ went to 1000, which should help multimedia latencies a lot. > > It shouldn't materially damage performance unless we have other things > extremely wrong. Its easy enough to verify by putting HZ back to 100 and > rebenching
1000 times per second, enter timer interrupt, acknowledge it, exit interrupt. Few i/o accessess, few tlb entries kicked out, some L1 cache consumed?
Is 10usec per timer interrupt reasonable on modern system? That's 10 msec per second spend in timer with HZ=1000, thats 1% overall. So it seems to me it is possible for HZ=1000 to have performance impact...
Pavel
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