-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi Tom,
because there are PCs out there with more than 200GB RAM, as well as programs and systems that make use of them. As far as I understand a 32-bit compiled kernel would have not possibility to address anything beyong 4GB. Regards, Tim On 04/04/12 10:53, Tom Peat wrote: > Hello Tim, > > I believe the notion comes about as one can thread 64 instead of 32 addresses > concurrently, thereby boosting performance. If it has no performance boost, > why would they bother? > > Cheers, tom > > -----Original Message----- > From: Tim Gruene [mailto:t...@shelx.uni-ac.gwdg.de] > Sent: Wednesday, 4 April 2012 6:43 PM > To: Peat, Tom (CMSE, Parkville) > Cc: CCP4BB@JISCMAIL.AC.UK > Subject: Re: [ccp4bb] Who is using 64-bit Linux? > > Dear Tom, > > 64-bit is about memory addressing - why would you expect a performance > boost? I have wondered where this notion originated from. > > Cheers, > Tim > > On 04/03/12 22:07, Tom Peat wrote: >> We use the 64 bit Centos (Red Hat) distro and CCP4, Coot, etc seem to work >> fine on this. >> I can't say I notice a big performance boost from the 64 bit side of things. >> Maybe I'm just impatient. >> cheers, tom > > >> Tom Peat >> Biophysics Group >> CSIRO, CMSE >> 343 Royal Parade >> Parkville, VIC, 3052 >> +613 9662 7304 >> +614 57 539 419 >> tom.p...@csiro.au >> ________________________________________ >> From: CCP4 bulletin board [CCP4BB@JISCMAIL.AC.UK] On Behalf Of Roger Rowlett >> [rrowl...@colgate.edu] >> Sent: Wednesday, April 04, 2012 5:57 AM >> To: CCP4BB@JISCMAIL.AC.UK >> Subject: [ccp4bb] Who is using 64-bit Linux? > >> The time has come for me to upgrade my Linux OS to something more recent >> for me and my student workstations. A 32-bit distro is certainly >> conservative and compatible with CCP4 and Coot, but it seems like that >> solution hobbles my hardware and puts some limitations on available >> memory, even with PAE enabled. So who is using a 64-bit distro these >> days, and are there lingering issues of compatibility and dependency >> hell with commonly used XRD software, like CCP4, Coot, iMOSFLM etc.? > >> Ubuntu 12.04 LTS (beta) actually works OK with one simple workaround for >> the global menu for CCP4 and Coot, and wine compatibility is fine for >> running CrysalisPro in the same environment, so it's really comes down >> to whether or not the extra performance of a 64-bit OS is worth the pain >> of compatibility issues for XRD software. Any thoughts? > >> Cheers, > >> _______________________________________ >> Roger S. Rowlett >> Gordon & Dorothy Kline Professor >> Department of Chemistry >> Colgate University >> 13 Oak Drive >> Hamilton, NY 13346 > >> tel: (315)-228-7245 >> ofc: (315)-228-7395 >> fax: (315)-228-7935 >> email: rrowl...@colgate.edu > > - -- - -- Dr Tim Gruene Institut fuer anorganische Chemie Tammannstr. 4 D-37077 Goettingen GPG Key ID = A46BEE1A -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iD8DBQFPfA/AUxlJ7aRr7hoRAmfDAKDleNNb2BVxcNIHg7x81ks3gK5BpACgzQ9J DwQDnMorze1xjTZ+0qqacEg= =wVwe -----END PGP SIGNATURE-----
