Re: LinuxThreads replacement

From: Petri Helenius (pete_at_he.iki.fi)
Date: 07/12/03

  • Next message: Hendrik Scholz: "Network performance tuning article" 
    To: "Mike Makonnen" <mtm@identd.net>
Date: Sat, 12 Jul 2003 22:51:24 +0300

    >
    > It's not as simple as that. In practice a lot of factors about
    > your system and the type of work you're doing will affect the
    > performance. On paper, the SA/KSE method is supposed to combine
    > the best aspects of 1:1 (libthr) and N:1 (libc_r), and should
    > threoretically be "better" than either one. But, in practice,
    > complexity and overhead may drown out the performance gains.
    > Conversely, context switching overhead may not be as great a
    > penalty for the 1:1 model on modern cpus.
    >
    Anyone have any numbers of different architechtures for the context
    switch? AMD64? Itanium? i386? PPC? Sparc? How about interrupt
    latency? SMP coherency overhead?

    The basic memory bandwidth has become a marketing thing so
    the raw megabytes per second are readily available but in multiprocessor
    and multithreaded environment there is a lot more into it.

    Pete

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