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Concurrent Booting: make full use of your dual-core, multithreaded or hyperthreaded processors in Ubuntu

This is a great way to make full use of your multi-core processors during boot time. I have an Intel core 2 duo processor and I have seen a notable change in boot time. Here’s the how-to: More here

This will reorder the start processes and now CONCURRENCY=shell option can be used. For more information about the dbus, hal and gdm race condition, see this page. Please write in the comments if you have any questions.

One Response to “Concurrent Booting: make full use of your dual-core, multithreaded or hyperthreaded processors in Ubuntu” »

  1. Comment by mzsade — November 8, 2009 @ 3:08 am

    Hi, which of these “CONCURRENCY=none” instances should i change?
    [if [ startpar = "$CONCURRENCY" ] ; then
    test -s /etc/init.d/.depend.boot || CONCURRENCY=”none”
    test -s /etc/init.d/.depend.start || CONCURRENCY=”none”
    test -s /etc/init.d/.depend.stop || CONCURRENCY=”none”
    startpar -v > /dev/null 2>&1 || CONCURRENCY=”none”

    # startpar do not work properly at the start of rcS.d/. Avoid it.
    # See #457896 for details.

    if [ S = "$runlevel" ] ; then
    CONCURRENCY=none]

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