Messages in this thread | | | Date | Thu, 18 Mar 2004 16:59:52 +0000 | From | Dave Jones <> | Subject | Re: Linux Kernel Microcode Question |
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On Thu, Mar 18, 2004 at 04:40:49PM +0000, Justin Piszcz wrote:
> My question is, what are the advantages vs disadvantages in updating your > CPU's microcode?
It'll fix known problems in the microcode thats in ROM on your CPU.
> Is it worth it?
In most cases, yes. It's zero cost. You don't waste RAM, as the microcode gets loaded into small RAM areas on the CPU that are otherwise unused.
> Does it matter what type of Intel CPU you have?
yes. You need at least a Pentium Pro. Also Pentium 4 needs a newer format microcode, which isn't available publically anywhere yet afaik.
> Do some CPU's benefit more than others for microcode updates?
Some CPUs have more bugs that need fixing than others 8) Additionally some CPUs may not have a newer microcode available than the one that it shipped with in ROM
> Can anyone explain reasons to or not to update the CPU microcode?
In some cases, your BIOS is doing this transparently already. I've seen instances where moving a CPU between two motherboards has meant that microcode_ctl has done an upgrade on one, and done nothing on the other as its already up to date.
If you're already up-to-date, theres no reason to run it.
Dave
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