Date: Sun, 17 Jul 2005 20:20:53 -0300 (ADT) From: "Marc G. Fournier" <scrappy@hub.org> To: freebsd-stable@freebsd.org Subject: 6.x Performance note in /usr/src/UPDATING ... Message-ID: <20050717201956.B1035@ganymede.hub.org>
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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.
Can someone add a pointer to this as to how to actually do this? For
instance, I know from 5.x about the 'ln -s aj /etc/malloc.conf' for malloc
... but what about the rest?
----
Marc G. Fournier Hub.Org Networking Services (http://www.hub.org)
Email: scrappy@hub.org Yahoo!: yscrappy ICQ: 7615664
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