On Mon, 2008-10-27 at 16:14 +0000, Alan Cox wrote: > On Mon, 27 Oct 2008 11:54:47 -0400 > Matthew Flaschen <matthew.flaschen@xxxxxxxxxx> wrote: > > > Alan Cox wrote: > > > > > The moment you have more than about 900MB of RAM there are big advantages > > > to running a 64bit kernel as it can keep all of physical and virtual > > > space mapped at the same time, which is a big performance win. > > > > > > Alan > > > > Can you point to any benchmarks showing a significant performance gain > > for a 1 GB desktop user? > > I'm not aware of anyone having sat down and run formal benchmarks on the > Fedora desktop. One of the problems with that is that you need a > reproducable representative benchmark typically scripting all the mouse > clicks and keypresses, using identical data sets and so on. They are hard > to produce and I'm not aware of any Linux ones that don't involve payment > of large sums of money to third party who runs their own closed secret > test and produces a number you can stick up in lights. So let me turn the > question around - given that the evidence from microbenchmarks and CPU > architects is that 64bit is the better choice can you show any > good quality benchmarks showing it isn't a win ? > > There are real benchmark numbers for CPU performance, relative code > density and the like and you can generate mapping cost benchmarks. AMD > and Intel have published various studies on the former two. There are > lots of benchmarks for server performance because there is money in that > market so people actually TPC and other things to sell enterprise product. > > However if you cared about performance you wouldn't be running Gnome or > Kde ;) > > Alan > I understand the point but Linux benchmarks exist such as the ones below: http://lbs.sourceforge.net/ -- ======================================================================= Sometimes I wonder if I'm in my right mind. Then it passes off and I'm as intelligent as ever. -- Samuel Beckett, "Endgame" ======================================================================= Aaron Konstam telephone: (210) 656-0355 e-mail: akonstam@xxxxxxxxxxxxx -- fedora-list mailing list fedora-list@xxxxxxxxxx To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
