Messages in this thread |  | | Date | Sun, 30 Sep 2001 20:11:32 +0200 (CEST) | From | Luigi Genoni <> | Subject | Re: GCC 2.95, 2.96 and 3.0 on linear algebra (was RE: 2 GB file limitation) |
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yes, thanx, I am very interested in those details.
For the tests i made on sparc64 gcc 3.0.1 is really faster than previous versions (2.95.3 and egcs 1.1.2), but on AMD Athlon is a different story. I think I can infer that gcc speed depends a lot from CPUs, but usually and storically gcc was heavilly x86 optimized...
Luigi
On Sun, 30 Sep 2001, M. Edward Borasky wrote:
> I have heard from the Atlas linear algebra folks the following: > > 1. For compiling Atlas, both on Athlons and Pentia, GCC 2.95.x produces > *significantly* faster operation than either 3.0.x or 2.96.x > 2. For IA64, the reverse is true: GCC 3.0.x produces significantly faster > code. > > I can dig up the URL for the mailing list if anyone cares for the details. > > -- > M. Edward (Ed) Borasky, Chief Scientist, Borasky Research > http://www.borasky-research.nethttp://www.aracnet.com/~znmeb > mailto:znmeb@borasky-research.net mailto:znmeb@aracnet.com > > Q: How do you tell when a pineapple is ready to eat? > A: It picks up its knife and fork. > > > -----Original Message----- > > From: linux-kernel-owner@vger.kernel.org > > [mailto:linux-kernel-owner@vger.kernel.org]On Behalf Of Gábor Lénárt > > Sent: Sunday, September 30, 2001 1:24 AM > > To: Luigi Genoni > > Cc: Linux Kernel > > Subject: Re: 2 GB file limitation > > [snip] > > > > > I think you can get >2GB support if you've Gcc 3.0. Even with > > the latest > > > > > > > ??? > > > I am using it and I am using gcc 2.95.3 for normal things, > > > and to compiled my kernel and my libc, because gcc > > > 3.0.1 produces slower binaries on my Athlons (yes, with athlon > > > optimizzations turned on), at less for my programs, and it is better to > > > avoid it for glibc compilation because of back compatibility issues. > > > > Yes, gcc3 is (well at least NOW) a piece of shit. It produces BIGGER and > > SLOWER binaries ... Checked on: Athlon, AMD K6-2. > > With the same gcc command line ... > > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ >
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