Date: Mon, 25 Mar 1996 20:57:17 -0800 (PST) From: Rob Mallory <rmallory@wiley.csusb.edu> To: current@freefall.FreeBSD.org Cc: gibbs@freefall.FreeBSD.org, dyson@freefall.FreeBSD.org Subject: nocacheflush=true (was Re: Adaptec 1542B and 1522 on current kernels) Message-ID: <199603260457.UAA06712@wiley.csusb.edu> In-Reply-To: <199603251315.IAA25614@dyson.iquest.net> from "John S. Dyson" at Mar 25, 96 08:15:59 am
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> >
> Certainly not to dispute problems that some people have been having, but
> using the bt driver with the BT545S, I had *extremely* stable SCSI subsystem
> operation. My machine was a 486/66 non-write back (early CPU.) I wonder
> if some MBs don't support cache invalidation properly?
^^^^^ ^^^^^^^^^^^^^^^^^^
This is why Solaris X86 ships with "set nocacheflush=false" as
default. in /etc/system you set it to 'true' to get better performance.
It is doccumented in the admin/hardware answerbook for slowaris-X86.
I dont know what they are doing, but on a 486/66 with a working
cache, I did notice a difference when doing the above.
--
Rob Mallory [rmalory@csusb.edu]
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