Re: SCO: "thread creation is about a thousand times faster than on native Linux"

From: Ingo Molnar (mingo@elte.hu)
Date: Sun Aug 27 2000 - 17:57:01 EDT

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    On Wed, 23 Aug 2000, Joerg Pommnitz wrote:

    > quote> SCO's Juergen Kienhoefer tells us that by mapping clone processes
    > quote> directly onto UnixWare's native threads, huge performance gains
    > quote> can be realised. "Basically thread creation is about a thousand
    > quote> times faster than on native Linux," he said. [...]

    Linux creates a 'native Linux thread' via clone() in about 10
    microseconds. So SCO creates a thread in 10 nanoseconds - ie. faster than
    a cacheline load on most CPUs - wow!

    glibc creates a pthread in about 300 microseconds, thats certainly slow.
    (but then again, still faster than NT's thread creation latency.) I doubt
    SCO creates a pthread in 0.3 microseconds.

            Ingo

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