Messages in this thread | | | From | (Roman Zippel) | Subject | Re: zero-copy TCP fileserving | Date | Mon, 7 Jun 1999 16:12:08 +0200 (MET DST) |
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Hi,
> All the useful research is on message passing. That is a different game to > TCP. Most of it is not SMP related - SMP scaling means you can't use mmu > tricks for this stuff. Cross cpu invalidates to COW pages kill you rather > rapidly
That's a problem on intel, e.g. ppc can invalidate pte's on other cpu with a few instructions and doesn't need such a horrible smp_flush_tlb(), so zerocopy is possible, but not with intel/smp.
bye, Roman
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