Re: Advice on changing to 64 bits

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Jerry Feldman wrote:
> Actually, I did  a number of (unofficial) benchmarks a while ago when I
> worked for partner engineering at HP.  While most of the benchmarks ran
> well at 64-bit, one of my partner's tested their applications and found
> their 32-bit versions were significantly faster (I think this one was on
> HP-UX, but may have been Linux). Additionally, we found on the Digital
> Alpha that there were some applications that were slower in 64-bits. The
> Alpha was a full 64-bit chip with no native 32-bit mode.  For the most
> part, the personal workstation as you point out, won't make too much of
> a different. Just remember that a 64-bit OS can address the full 4GB of
> the OP's system where a 32-bit OS must use PAE to access over 3GB. This
> restriction only comes into play if you have a very memory intensive
> application.

x86 is a very different story than the Alpha. x86_64 adds more registers,
which is already enough to boost program speed (fewer memory accesses
needed). x86_64 also means at least SSE and SSE2 are guaranteed to be
there, so you also benefit from those, whereas on 32-bit x86 only a few
libs have sse2 versions available.

        Kevin Kofler

-- 
fedora-list mailing list
fedora-list@xxxxxxxxxx
To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list
Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
[Index of Archives]     [Older Fedora Users]     [Fedora Announce]     [Fedora Package Announce]     [EPEL Announce]     [Fedora Magazine]     [Fedora News]     [Fedora Summer Coding]     [Fedora Laptop]     [Fedora Cloud]     [Fedora Advisory Board]     [Fedora Education]     [Fedora Security]     [Fedora Scitech]     [Fedora Robotics]     [Fedora Maintainers]     [Fedora Infrastructure]     [Fedora Websites]     [Anaconda Devel]     [Fedora Devel Java]     [Fedora Legacy]     [Fedora Desktop]     [Fedora Fonts]     [ATA RAID]     [Fedora Marketing]     [Fedora Management Tools]     [Fedora Mentors]     [SSH]     [Fedora Package Review]     [Fedora R Devel]     [Fedora PHP Devel]     [Kickstart]     [Fedora Music]     [Fedora Packaging]     [Centos]     [Fedora SELinux]     [Fedora Legal]     [Fedora Kernel]     [Fedora OCaml]     [Coolkey]     [Virtualization Tools]     [ET Management Tools]     [Yum Users]     [Tux]     [Yosemite News]     [Gnome Users]     [KDE Users]     [Fedora Art]     [Fedora Docs]     [Asterisk PBX]     [Fedora Sparc]     [Fedora Universal Network Connector]     [Libvirt Users]     [Fedora ARM]

  Powered by Linux