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    SubjectRe: [patch v2] epoll use a single inode ...
    Eric Dumazet wrote:
    > For epoll, I suspect this is harmless : Programs dont allocate epolls fd
    > every milli second, but at startup only.
    > For pipes/sockets, using a 64 bits would be problematic, because
    > sprintf() uses a divide for each digit. And a divide is slow. Ten
    > divides are *very* slow.

    That's true for *any* sprintf(), though. sprintf() converts all its
    arguments to 64 bits.

    However, this could be optimized. I think right now sprintf() uses a
    generic divide-by-base, but a divide by 8 and 16 can of course be
    handled with a shift, and divide by 10 can be replaced with a
    multiplication by 0x1999999999999999ULL on most architectures.

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      Last update: 2007-03-06 17:31    [W:0.026 / U:36.664 seconds]
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