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    SubjectRe: big picture UDP/IP performance question re 2.6.18 -> 2.6.32
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    Le lundi 03 octobre 2011 à 14:02 -0400, starlight@binnacle.cx a écrit :
    > At 06:16 PM 10/3/2011 +0200, Eric Dumazet wrote:
    > >
    > >It seems you use 4096 2MB hugepages, and your
    > >machine has 1GB pages availabe, you could
    > >try to use them.
    > >
    > >(boot cmd : hugepagesz=1GB hugepages=8 )
    >
    > Tried it and got errno 12 on the segment
    > allocations. None were allocated, though
    > the count is six and the largest is exactly
    > 1GB. Don't have time to dig into it.
    >

    Thats pretty normal ;)

    With 2MB pages, your segment size must be a 2MB multiple.

    With 1GB pages, your segment size must be a .... 1GB multiple.

    So only applicable is say you handle one big 8GB segment for example, or
    2 4GB segments... Well you see the picture.




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