Messages in this thread | | | Date | Tue, 20 Jan 2009 16:13:47 +0100 | From | Ingo Molnar <> | Subject | Re: lmbench lat_mmap slowdown with CONFIG_PARAVIRT |
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* Ingo Molnar <mingo@elte.hu> wrote:
> That shows the expected $cache risks here as well: i ran this on an > Extreme Edition CPU which has a ton of L2 cache [4MB] which mutes L2 > $cache misses quite a bit.
[ there's no such thing as "L2 $cache misses" - what i wanted to say is that while the instruction cache size is rather small and static, a large L2 cache helps in keeping the costs of instruction-cache misses low - hence my measurement skews in favor of paravirt. ]
Ingo
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