Re: freebsd-performance Digest, Vol 3, Issue 11

From: David O'Brien (obrien_at_freebsd.org)
Date: 05/22/03

  • Next message: Paul Murphy: "[OT] Re: freebsd-performance Digest, Vol 3, Issue 11" 
    Date: Thu, 22 May 2003 10:56:15 -0700
To: Pavel Kraynyukhov <pavelkraynyukhov@mail.ru>

    On Thu, May 22, 2003 at 09:14:45AM +0200, Pavel Kraynyukhov wrote:
    > As far as i know HyperThreading is an Intel trademark and technologie as
    > well.
    > AMD has something similar for them processors, but i have no idea is such
    > feature supported by FreeBSD for AMD processors.

    I can tell you with upmost authority that AMD does not have something
    like HyperThreading in its CPU's -- not even in K8.

    > > I gotta question. I am contemplating buying the new AMD Opteron for a
    > > newer FreeBSD server. I am certain because of it's x86 compatibility
    > > running FBSD won't be a problem,

    Nope, no problems:

    FreeBSD 5.1-BETA #9: Thu May 22 09:20:08 GMT 2003
        root@k8.amd.com:/hammer/sys/amd64/compile/GENERIC

    CPU: AuthenticAMD AMD64 Class Processor
      Origin = "AuthenticAMD" Id = 0xf40 Stepping = 0
      Features=0x78bfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CM
        OV,PAT,PSE36,CLFLUSH,MMX,FXSR,SSE,SSE2>
    AMD Features=0xe0500000<<b20>,AMIE,<b29>,DSP,3DNow!>

    # file /boot/kernel/kernel
    /boot/kernel/kernel: ELF 64-bit LSB executable, AMD x86-64, version 1 (FreeBSD),
     dynamically linked (uses shared libs), not stripped

    > > and I know that there is a 64Bit Apache
    > > underways, but is there any 64 bit MySQL Server on the way? Or does MySQL
    > > compile with that option? I am certain it can be built with Hyper
    > > Threading, but can that help performance on a single 64 bit CPU? Please
    > > help! (before I invest :-))

    It will perform very well -- HyperThreading does is not the same as
    having two real processors. Some apps do perform better on a
    HyperThreaded CPU, others don't.
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  • Next message: Paul Murphy: "[OT] Re: freebsd-performance Digest, Vol 3, Issue 11"

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