On 2010-02-17 22:23:17 -0600, Stan Hoeppner wrote: > Vincent Lefevre put forth on 2/17/2010 6:21 AM: > > On 2010-02-16 09:52:06 -0600, Stan Hoeppner wrote: > >> As a bonus, due to various architectural reasons I won't delve into, > >> 32bit binaries will usually run slightly faster than the 64 bit > >> cousins, and they'll take up a little bit less disk space. > > > > No, this depends on the application (and "usually" doesn't mean very > > much because applications will depend on what the machine is used > > for). And some people would completely disagree with you, e.g.: > > Vincent, you're quoting me out of context. Apparently you haven't > read the entire thread. Or you're misquoting me intentionally. I > clearly stated that my comments pertained to a certain application > class on this platform.
AFAIK nothing has been said about such a certain application class. > > http://www.phoronix.com/scan.php?page=article&item=ubuntu_32_pae&num=1 > > These benchmarks are irrelevant to the current discussion. They are > on a capable dual core Intel Core Processor, I know that the processor is different, but what you said could be interpreted as a general remark on the amd64 architecture. Unfortunately you didn't provide any benchmarks yourself. So, what you said is purely gratuitous. > and the application mix is not the same as that of an average Atom > user. The OP isn't necessarily an "average Atom user". > > There's another point is favor of amd64: floating-point arithmetic. > > As SSE is used by default on amd64, FP arithmetic is much cleaner > > there in practice. > > We all know this already (or at least should). However, again, it's > irrelevant to _this_ thread. Why? > This thread, and my comments, deal with Atom based systems with less > than 2GB of RAM. This thread is not about 32bit vs 64bit binary > performance in general. No, this thread is about answering the OP's question, which is: Which architecture should I use for an Intel Atom Processor? Also, the FP behavior is *not* binary performance. > It's about 32bit vs 64bit binary performance on the Atom processor > and the bulk of applications that users will run on such a platform > daily, which basically includes only these two apps: > > 1. Web brower > 2. Email client The OP did *not* say that he would use only these two applications. Anyway, even a web browser is affected by the x86 FP behavior (at least under Debian), and any user can be affected by it since users don't control scripts from remote web sites. > x86-64 optimizations and performance enhancements will rarely be > taken advantage of for this class of machine. FP (SSE/SSE2) isn't > going to make a lick of difference. Wrong! See http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=309797 for instance (this is for Mozilla, but Iceweasel on Debian/stable is affected too -- I could test it). -- Vincent Lefèvre <vinc...@vinc17.net> - Web: <http://www.vinc17.net/> 100% accessible validated (X)HTML - Blog: <http://www.vinc17.net/blog/> Work: CR INRIA - computer arithmetic / Arénaire project (LIP, ENS-Lyon) -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20100218140533.gi23...@prunille.vinc17.org
