Re: buildworld times

From: Andre Guibert de Bruet (andy_at_siliconlandmark.com)
Date: 02/29/04

  • Next message: Bruce Evans: "Re: failed to set signal flags properly for ast()" 
    Date: Sat, 28 Feb 2004 23:25:06 -0500 (EST)
To: Vincent Poy <vince@oahu.WURLDLINK.NET>

    On Sat, 28 Feb 2004, Vincent Poy wrote:

    > On Sat, 28 Feb 2004, Robert Watson wrote:
    > > As you point out, debugging problems is a lot easier if you run with
    > > INVARIANTS+WITNESS. However, you may well see build times halve or more
    > > by running without WITNESS.
    >
    > I always thought INVARIANTS caused slow performance as well.
    > Ofcourse, it does seem all the stuff mentioned above is disabled in a
    > -RELEASE GENERIC kernel so that may be it as well.

    GENERIC's got enough stuff in it that you will notice a good difference in
    the disk footprint of the image as well as the memory image of the kernel
    when run. I tend to take GENERIC, strip out all of the statically compiled
    drivers that I don't need and add whatever options I need on the machine.
    >From my own tests, something as simple as "options ADAPTIVE_MUTEXES" can
    yield upwards of 5% compile time reduction. This number is even higher on
    multi-CPU machines.

    Regards,
    Andy

    > Andre Guibert de Bruet | Enterprise Software Consultant >
    > Silicon Landmark, LLC. | http://siliconlandmark.com/ >
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  • Next message: Bruce Evans: "Re: failed to set signal flags properly for ast()"