Re: 64bit CPUs

From: Mariusz Grad (mariusz.grad_at_pwr.wroc.pl)
Date: 05/02/05

  • Next message: Eric Anderson: "Re: Very low disk performance on 5.x" 
    Date: Mon, 2 May 2005 14:16:33 +0200
To: Mike Tancsa <mike@sentex.net>

    Mike Tancsa:
    > A somewhat obvious question to some perhaps, but what server application
    > mix on FreeBSD today sees an improvement using 64bit CPUs ? In my ISP
    > centric world, my big apps are BIND, IMAP/POP3, httpd via apache, SMTP, AV
    > and SPAM scanning, and firewalls/routing. Apart from larger RAM, why would
    > these benefit from the 64bit world ? Or would they ?
    Benefits from AMD64:
    - larger RAM limit (40bit memory address),
    - 64bit GRPs,
    - much faster access to memory (memory controller inside core - no northbridge),
    - it much better scales (with many CPUs) (he doesnt share memory bandwith),
    - large caches L1 = 64KB, L2 = 1MB (comparing to xeon 12/512K),
    - DEP = Data Execution Protection (it has to be supported via OS),
    - Multimedia Extensions for graphics / vector processing.
    = Opterons remove memory bottlenecks espacially with multi-cpus.

    Ive had large acceleration at:
    - math computation (f77, 2-4GB double precision matrix) single opteron 1.8GHz (sun v20z) was 4x faster then celeron 2.4GHz.
    - databases (pgsql) Opteron 1.8 GHz 2x faster then Xeon 3.2

    I would assume that everything which can run:
    - in parallel,
    - on multi-Opterons CPU,
    - which uses heavly RAM,
    - which can take benefits from 64bit registers (floating points),
    will have _extreamly_ boost comparing to Intels EMT64 (or Itanium2). 

    -- 
Mariusz Grad / UNIX Systems Administrator
tel: +4871 320-2520 mobile: +48 501-134-008
Wroclaw Centre for Networking and Supercomputing 
address: Wybrzeze Wyspianskiego 27, Wroclaw, Poland
_______________________________________________
freebsd-performance@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-performance
To unsubscribe, send any mail to "freebsd-performance-unsubscribe@freebsd.org"
  • Next message: Eric Anderson: "Re: Very low disk performance on 5.x"

    Relevant Pages

    • Re: Steve Jobs demos Macintosh in 1984
      ... Woody wrote: ... Stop annoying the fucking hell out of me, ... For sure not much computer memory had been made in 1948 - but it could ... For sure you got a bit more RAM to use in the Speccy - ...
      (uk.comp.sys.mac)
    • Re: Windows uses 4 GB? Really?
      ... I bought 4 GB of RAM because I thought it would speed up my system a bit. ... Some info that is posted here as reference seems to suggest that it is a Windows issue, but others seem to suggest that it is also a hardware issue. ... "I have install total 4GB memory on my motherboard. ... On a SLI system, since PCI-Ex graphic cards will occupy around 256MB, another 256MB will be occupied after you install a 2nd PCI-Ex graphic card. ...
      (microsoft.public.windowsxp.general)
    • Re: Computer wont boot up after installing new RAM
      ... I even took a look at an old Gigabyte motherboard ... DDR2 memory stick, the notch does not line up. ... "To install the memory module, ... into the motherboard RAM slots. ...
      (microsoft.public.windowsxp.hardware)
    • Re: Random Restarts - Please Help
      ... I upgraded my BIOS a long time ago ... Beginners Guides: Diagnosing Bad Memory ... How to diagnose bad RAM ...
      (microsoft.public.windowsxp.help_and_support)
    • Re: Alocated Memory Error (SQLSERVR)
      ... but my understanding is that the MSDE instances are designed to ... and you don't want it grabbing all that RAM. ... running but non ever going about 200mb of memory usage. ... Server 2000 SP4, ...
      (microsoft.public.windows.server.sbs)