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Old 06-15-2009, 07:23 PM   #1
kushalkoolwal
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Processor Type selection in Kernel


Hi,

I am trying to configure a 2.6.30 kernel (on Debian) for my Intel Atom processor. Based on a LKML discussion it says that:

Quote:
Core2 instruction set with tune=generic is still the best to set.
Does that basically translate in "make xconfig" term to select:
Code:
CONFIG_MCORE2
and
X86_GENERIC
in my kernel configuration menu?
 
Old 06-15-2009, 08:20 PM   #2
DragonSlayer48DX
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Actually, the entire conversation is:

Quote:
Am I right in thinking that CONFIG_MCORE2 is the correct choice for
an Intel Atom?

No, Atom is completely different from a Core2.

Right now 586 or 686 is a reasonable choice.

actually 586 is completely wrong.

It is nearest in scheduling at least. You'll lose CMOV, but that's
not a big loss.

Core2 instruction set with tune=generic is still the best to set.

Not sure that is true. These option are mostly for the compiler.
I'd suggest researching the Atom, and maybe even contacting Intel. This guy doesn't sound very sure of what he's talking about.

http://lkml.indiana.edu/hypermail/li...10.1/2011.html

Last edited by DragonSlayer48DX; 06-15-2009 at 08:21 PM.
 
Old 06-15-2009, 09:49 PM   #3
kushalkoolwal
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Quote:
Originally Posted by dragonslayer48dx View Post
I'd suggest researching the Atom, and maybe even contacting Intel.
Thanks for your reply. Let's assume (just for the sake of understanding and process) if that guy was talking right, then would those two options that I mentioned in my original post relates to what had been suggested (MCORE2 with tune=generic)
 
Old 06-16-2009, 04:34 AM   #4
DragonSlayer48DX
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Well, first he said 'no'.

Quote:
No, Atom is completely different from a Core2.
Then he said 'yes'.

Quote:
Core2 instruction set with tune=generic is still the best to set.
Then he said (paraphrasing) 'I'm clueless'.

Quote:
Not sure that is true.


Anyway, a quick Google search turned up this spec page on the Atom.

Notice that there are several models; only one is dual-core, and two are 64-bit. I would think you need to match the bit-rate, instruction set, etc for it to work properly and gain the full potential of the system, so it really depends on which Atom you have.

Last edited by DragonSlayer48DX; 06-16-2009 at 04:38 AM.
 
Old 06-16-2009, 05:26 AM   #5
kushalkoolwal
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I understand that you guys are trying to help me to correctly configure the kernel. However if you notice my original question in which I am asking whether the description:
Quote:
Core2 instruction set with tune=generic is still the best to set.
means configuring the following way:
Code:
CONFIG_MCORE2=y
and
X86_GENERIC=y
That's all I wanted to know. It's just that I haven't before terms like tune=generic and all that, so I am trying to understand the concept and terminology rather than deciding what is the correct config for my processor. I hope that it is clear now as to what I am asking.
 
  


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