Date: Sun, 26 Sep 2004 00:36:11 +0200 From: Mauro Triulzi <triulzi@freesurf.ch> To: Michael Nottebrock <michaelnottebrock@gmx.net> Cc: freebsd-current@freebsd.org Subject: Re: ATA disk performance (ICH2 controller), some tests andcomparison with Linux 2.6.5 Message-ID: <4155F2DB.6090006@freesurf.ch> In-Reply-To: <200409252358.10814.michaelnottebrock@gmx.net> References: <4155DC3F.5070904@freesurf.ch> <200409252358.10814.michaelnottebrock@gmx.net>
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Michael Nottebrock wrote: >On Saturday 25 September 2004 22:59, Mauro Triulzi wrote: > > >>Hello, >> >>I post some tests about the performance of my ATA disk (which is not >>very spectacular under FREEBSD 6.0). >> >> > >Standard disclaimer (copied from UPDATING): > >NOTE TO PEOPLE WHO THINK THAT FreeBSD 6.x IS SLOW: > FreeBSD 6.x has many debugging features turned on, in > both the kernel and userland. These features attempt to detect > incorrect use of system primitives, and encourage loud failure > through extra sanity checking and fail stop semantics. They > also substantially impact system performance. If you want to > do performance measurement, benchmarking, and optimization, > you'll want to turn them off. This includes various WITNESS- > related kernel options, INVARIANTS, malloc debugging flags > in userland, and various verbose features in the kernel. Many > developers choose to disable these features on build machines > to maximize performance. > >So... did you turn off all those? > > > Yes of course: foo# uname -a FreeBSD foo.bar.com 6.0-CURRENT FreeBSD 6.0-CURRENT #0: Sat Sep 25 17:54:29 CEST 2004 triulzi at foo.bar.com <http://lists.freebsd.org/mailman/listinfo/freebsd-current>:/usr/src/sys/i386/compile/MYKERNEL i386 source tree actualized and built today, *all debugging options disabled*
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