ATA disk performance (ICH2 controller), some tests andcomparison
with Linux 2.6.5
Mauro Triulzi
triulzi at freesurf.ch
Sat Sep 25 15:36:59 PDT 2004
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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