Which installation medium do I use?

static_k · n00b Joined: 10 Oct 2005 Posts: 73 Location: NY

Hi Everyone,

It's been a long time since I setup gentoo and I just got a new laptop I want to put it on. It's a dell e6400 and I'm a bit confused on which iso and stage 3 to download. I believe it is a 64bit processor according to the Intel site.
http://ark.intel.com/Product.aspx?id=37006

Should I be downloading the x86 iso's or the amd64 iso's?

Here is my /proc/cpuinfo:

bombcar · Posted: Wed Feb 10, 2010 7:16 am Post subject:

amd64 = x86-64.

You have a core2duo, so you want x86-64 almost certainly. Your make.conf looks decent, but you might want to check. I couldn't your CPU on the Safe CFLAGS wiki page.

NathanZachary · Posted: Wed Feb 10, 2010 7:35 am Post subject:

Are you going to be using the stable or the testing branch? Your CFLAGS might be better off as -march=native. You might also want to put in -fomit-frame-pointer to free up a register. Lastly, you might want to check out Diego Petteno's article on using the LDFLAG --as-needed:

http://www.gentoo.org/proj/en/qa/asneeded.xml

I have been using it for quite some time now, and have been pleased with the results.
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d2_racing · Posted: Wed Feb 10, 2010 1:13 pm Post subject:

I'm not sure, but I think that with native, it will add automagically -fomit-frame-pointer .
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Jaglover · Posted: Wed Feb 10, 2010 1:39 pm Post subject:

Not sure, but isn't -fomit-frame-pointer default with 64bit anyhow?

Mike Hunt · Watchman Joined: 19 Jul 2009 Posts: 5287

On x86 it must be explicitely activated...

yngwin · Posted: Wed Feb 10, 2010 2:05 pm Post subject:

static_k · n00b Joined: 10 Oct 2005 Posts: 73 Location: NY

NathanZachary · Posted: Wed Feb 10, 2010 8:08 pm Post subject:

That is a point that causes confusion often. It was named that way originally, and the naming scheme has been kept for consistency.
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d2_racing · Posted: Thu Feb 11, 2010 3:45 am Post subject:

In fact, back in 2003 I think or even earlier, Gentoo or maybe the first GCC 64 bits release created the AMD64 profile, because AMD was the first one to introduce 64 bits CPU.
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rtomek · Posted: Thu Feb 11, 2010 5:46 am Post subject:

fangorn · Veteran Joined: 31 Jul 2004 Posts: 1872

amd64 is as ia64 (Itanium) named after the company that invented it.

Where ia64 is a completely new architecture widely independent from ia32 (x86 - in other distributions called i386, i486, i586 (Pentium), i686 (Pentium Pro, Pentium 4 AFAIK)). The i stands for intel. Main concern in design was 64bit performance, so running 32bit programs on ia64 one was and is a major PITA.

amd64 came later and is an extension of the 32bit x86 architecture. One major goal in design was that running existing 32bit programs should be at least as fast as on the processors recent at the time. Actually it was first called x86_64, but it seems some AMD marketing guy thought it would be better to call it amd64.

Through the patent exchange deal between Intel and AMD, Intel has the right to build own processors using the amd64 architecture. Then the name confusion started, as Intel called their version EM64T, some still call it x86_64 (which is the most precise naming IMHO) and later on Microsoft called it x64.

As I had 64bit Linux on more than 10 machines before Intel thought about building own processors using it, I tend to call it amd64. :wink:

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