Date: Sat, 28 Feb 2004 23:25:06 -0500 (EST) From: Andre Guibert de Bruet <andy@siliconlandmark.com> To: Vincent Poy <vince@oahu.WURLDLINK.NET> Cc: current@freebsd.org Subject: Re: buildworld times Message-ID: <20040228231904.B3751@alpha.siliconlandmark.com> In-Reply-To: <20040228164010.I8264-100000@oahu.WURLDLINK.NET> References: <20040228164010.I8264-100000@oahu.WURLDLINK.NET>
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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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