Messages in this thread | | | Date | Wed, 10 Nov 1999 23:49:41 +0100 | From | Pavel Machek <> | Subject | Re: How to determine what portion of memory is cached? |
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Hi!
> > Is there a way in the kernel startup code (or anywhere in kernel > > for that matter) to determine what portions of physical system > > RAM are cached? > > The extended memory queries from the BIOS (E820) do actually provide this > information if I remember rightly
Well, and the same bios call reports ROM memory as being usable RAM on my toshiba :-).
If you stay away from 640KB..1MB region, common possibilities are that everything >64MB is not cached, or that everything >16MB is not cached. It should be rather easy to benchmark that. Pavel -- I'm really pavel@ucw.cz. Look at http://195.113.31.123/~pavel. Pavel Hi! I'm a .signature virus! Copy me into your ~/.signature, please!
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