Re: "Cache Profiler" ? (was: No cache control on ppc??)

I recently installed a NewerTech Maxpowr G3 L2-Cache - which is a G3
on a board that fits into one of the L2's ram banks on my Starmax
3000/160. I was ecstatic that the bogomips increased by 187%
(199.47). Recently, though, I heard of someone installing a JoeBoard
into his StarMax 5000 and his bogomips being around 800. He mentioned
something about a "Cache Profiler". It seems that BootX is somehow
able to tell the kernel that there is a G3 in the cache and speed is
increased greatly.

The CPU on the StarMax 3000/160 motherboard itself (what originally
came with it) is a PPC 603e. /proc/cpuinfo shows a 750 - which is good
but the bogomips are nowhere near what this person reported.  I do not
use BootX for I prefer booting straight into Linux with Quik.  Does
anyone know anymore about this and if it's possible to increase
performance more by somehow making the G3 quicker?

First boot once with BootX. Once in linux, grab the value of
/proc/sys/kernel/l2cr. Then, go back to quik, and in your
boot scripts, write back this value. This is the configuration
of the backside L2 cache of the 750.

Ben.


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