Re: [TCLUG:9929] Adding RAM for slow machine

[Scott Dier - dieman <dieman@ringworld.org>]

Your looking for the spec: ram cacheable.

The determing factor seems to be on-motherboard l2 cache size. (512k does
64, 1mb does 256 from what i remember)

Talk to your motherboard manufacturer.

On Tue, 9 Nov 1999, ^chewie wrote:

> Date: Tue, 9 Nov 1999 14:13:12 -0600 (CST)
> From: ^chewie <chewie@guinness.urw.org>
> Reply-To: tclug-list@mn-linux.org
> To: tclug-list@mn-linux.org
> Subject: Re: [TCLUG:9929] Adding RAM for slow machine
> 
> On Tue, 9 Nov 1999, Mike Hicks wrote:
> 
> MH >Some Pentium chipsets cannot cache memory above 64 MB.  This
> MH >means that if you upgrade to over 64 MB, you will notice a
> MH >decrease in system speed (and it would probably be immediate,
> MH >as I understand that memory is mapped from the top down on x86
> MH >systems..)  Linux does have a workaround for this (in 2.2.x
> MH >only?) where you can use the extra memory for a RAM disk (in
> MH >theory, you can put some swap space there), and still have a
> MH >full 64 MB of cached memory.
> 
> You know.  I've heard of this being a problem, but how does one
> determine if their Pentium chipset has this problem?  Is it evident in
> the VIA chipsets for K6 processors?  Where does one diagnose this
> problem?
> 
> I do like your suggestion of using RAM disk for a swap parition. :)
> You suffer a little speed, but not as much as you would trying to
> write to disk. :)
> 
> Later!
> 
>     ^chewie
> 
> +----------------------------------------------------+
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Scott Dier <dieman@ringworld.org> #nicnac@efnet 612.301.0265
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