Messages in this thread | | | Date | Thu, 23 May 2002 10:33:05 -0700 | From | Mike Fedyk <> | Subject | Re: It hurts when I shoot myself in the foot |
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On Wed, May 22, 2002 at 11:42:19PM -0600, Andreas Dilger wrote: > On May 22, 2002 21:49 -0700, Mike Fedyk wrote: > > On Wed, May 22, 2002 at 09:48:21PM -0600, Andreas Dilger wrote: > > > There was a kernel patch posted about 5 or so months ago which would > > > "handle" this setup (CPUs with the same clock speed, but different > > > multipliers). Alan Cox said it probably was a bad idea, so it wouldn't > > > go into the kernel, but the patch may still be usable. > > > > > > This is sometimes called "asymmetric multiprocessing", and the thread > > > is at http://marc.theaimsgroup.com/?l=linux-kernel&m=98519070331478&w=4 > > > > I thought asymmetric multiprocessing would support CPUs with different > > speeds. ie, 400 & 450mhz. How would you get different multipliers and same > > Mhz when the CPUs are on the same FSB(ignoring AMD SMP where each processor > > has an exclusive FSB, and this might be possible)? > > That was what I was trying to say: same FSB speed * different multipliers > = different CPU MHZ, like what the original poster is asking about. > I don't think it is possible to configure a motherboard to have different > FSB speeds for two processors. >
Me neither, but it seems theoretically possible.
> > There was a patch to compare the different features on the CPUs available > > and use the subset available on all processors. > > Hmm, maybe if you had actually read my email
I did. ;)
> and followed the URL I posted,
That I didn't do. :(
>you would have found the patch to which you refer ;-).
And you are correct. That is the exact patch to which I was referring.
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