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Date: Tue, 19 Jan 2010 22:11:24 +0000
From: Jamie Lokier <jamie@shareable.org>
Subject: Re: [Qemu-devel] [PATCH] Add definitions for current cpu models..
Message-ID: <20100119221124.GA11920@shareable.org>
References: <4B549016.6090501@redhat.com> <4B560A88.9@codemonkey.ws>
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To: Anthony Liguori <anthony@codemonkey.ws>
Cc: john cooper <john.cooper@redhat.com>, "Przywara,
	Andre" <Andre.Przywara@amd.com>, qemu-devel@nongnu.org, KVM list <kvm@vger.kernel.org>

Anthony Liguori wrote:
> On 01/18/2010 10:45 AM, john cooper wrote:
> >     x86           Conroe  Intel Celeron_4x0 (Conroe/Merom Class Core 2)
> >     x86           Penryn  Intel Core 2 Duo P9xxx (Penryn Class Core 2)
> >     x86          Nehalem  Intel Core i7 9xx (Nehalem Class Core i7)
> >     x86       Opteron_G1  AMD Opteron 240 (Gen 1 Class Opteron)
> >     x86       Opteron_G2  AMD Opteron 22xx (Gen 2 Class Opteron)
> >     x86       Opteron_G3  AMD Opteron 23xx (Gen 3 Class Opteron)
> 
> I'm very much against having -cpu Nehalem.  The whole point of this is 
> to make things easier for a user and for most of the users I've 
> encountered, -cpu Nehalem is just as obscure as -cpu qemu64,-sse3,+vmx,...

When I saw that table just now, I had no idea whether Nehalem is newer
and more advanced than Penryn, or the other way around.  I also have
no idea if "Core i7" is newer than "Core 2 Duo" or not.

I'm not a typical user: I know quite a lot about x86 architecture;
I just haven't kept up to date enough to know the code/model names.
Typical users will know less about them.

It's only from seeing the G1/G2/G3 order that I guess they are listed
in ascending order of functionality.

Naturally, if I were choosing one, I'd want to choose the one with the
most capabilities that works on whatever my host hardware provides.

-- Jamie