On Sat, 2004-12-04 23:29:48 -0700, Robert LeBlanc <robert@leblancnet.us> wrote in message <[🔎] 8C7BA7940746324BA6DFF77AAC3A4D6077A7@q.LeBlancNet.us>: > First, a program needs to be specifically written for 64 bits? Or by > just recompiling using 64-bit libs usually good enough? A program needs to be *cleanly* written to compile on a 64 bit system. However, that's not usually the case, especially if the program was never ever tested on anything but i386. Also, not all programs run faster because of being compiled to 64 bit programs; to be honest, I expect that most programs would better stay in 32 bit because of memory size. If you *really* want to take advantage of the 64 bit Opteron, you should have an eye on the code GCC generates. At some time, it may be better to code core routines (for mathematical computing) in assembler or to use existing libraries that do exactly this... > Second, to install a 64-bit kernel, you have to be running a 64-bit > kernel using deb packages? No. 64 bit userspace needs a 64 bit kernel, but all other combinations have no further dependancies. MfG, JBG -- Jan-Benedict Glaw jbglaw@lug-owl.de . +49-172-7608481 _ O _ "Eine Freie Meinung in einem Freien Kopf | Gegen Zensur | Gegen Krieg _ _ O fuer einen Freien Staat voll Freier Bürger" | im Internet! | im Irak! O O O ret = do_actions((curr | FREE_SPEECH) & ~(NEW_COPYRIGHT_LAW | DRM | TCPA));
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