Messages in this thread | | | Subject | Re: zero-copy TCP fileserving | Date | Mon, 7 Jun 1999 15:45:03 +0100 (BST) | From | Alan Cox <> |
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> 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.
You might want to benchmark the overhead of that. You have to invalidate and be sure the other cpu invalidation is complete before continuing. I don't doubt it can be way faster than intel, but I doubt its that cheap.
Anyone have datasheet figures ?
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