Hyperthreading?

I'm re-reading the "Using the Migration Wizard for NetWare servers" document,
and suddenly noticed the section on "Preparing the Destination Server" /
"Verify your BIOS configuration".

It says . . . "Go into the server's BIOS and make sure you . . . disable hyperthreading
if this is a server with hyperthreading support (Pentium 4 / Xeon class servers)."

Is disabling hyperthreading only to do with the Migration — or is this the recommended
setting for NetWare 6.5 servers?

Thanks,

-Steve
  • Steve Conrad wrote:

    > I'm re-reading the "Using the Migration Wizard for NetWare servers"
    > document, and suddenly noticed the section on "Preparing the
    > Destination Server" / "Verify your BIOS configuration".
    >
    > It says . . . "Go into the server's BIOS and make sure you . . .
    > disable hyperthreading if this is a server with hyperthreading
    > support (Pentium 4 / Xeon class servers)."
    >
    > Is disabling hyperthreading only to do with the Migration or is
    > this the recommended setting for NetWare 6.5 servers?
    >
    > Thanks,
    >
    > -Steve


    It is recommended for NetWare 6.5 not to use hyperthreading

    --
    Cheers,
    Edward
  • Steve Conrad wrote:

    > I'm re-reading the "Using the Migration Wizard for NetWare servers"
    > document, and suddenly noticed the section on "Preparing the
    > Destination Server" / "Verify your BIOS configuration".
    >
    > It says . . . "Go into the server's BIOS and make sure you . . .
    > disable hyperthreading if this is a server with hyperthreading
    > support (Pentium 4 / Xeon class servers)."
    >
    > Is disabling hyperthreading only to do with the Migration or is
    > this the recommended setting for NetWare 6.5 servers?
    >
    > Thanks,
    >
    > -Steve


    It is recommended for NetWare 6.5 not to use hyperthreading

    --
    Cheers,
    Edward
  • Steve Conrad wrote:

    > I'm re-reading the "Using the Migration Wizard for NetWare servers"
    > document, and suddenly noticed the section on "Preparing the
    > Destination Server" / "Verify your BIOS configuration".
    >
    > It says . . . "Go into the server's BIOS and make sure you . . .
    > disable hyperthreading if this is a server with hyperthreading
    > support (Pentium 4 / Xeon class servers)."
    >
    > Is disabling hyperthreading only to do with the Migration or is
    > this the recommended setting for NetWare 6.5 servers?
    >
    > Thanks,
    >
    > -Steve


    It is recommended for NetWare 6.5 not to use hyperthreading

    --
    Cheers,
    Edward
  • Edward van der Maas,
    > It is recommended for NetWare 6.5 not to use hyperthreading
    >

    Not just NetWare... :

    http://www.geek.com/articles/chips/intels-hyper-threading-hurts-server-performance-20051118/

    - Anders Gustafsson (Sysop)
    The Aaland Islands (N60 E20)

    Discover the Novell forums at http://forums.novell.com

    Novell does not monitor these forums officially.
    Enhancement requests for all Novell products may be made at
    http://support.novell.com/enhancement

  • Ok. I'm confused.

    We have a Dell PE2950 that has Dual Intel Xeon E5320 Processors.

    I'm seeing the E5320 processor being described as a Quad-Core processor.
    I'm also seeing it described as having Hyper-Threading.

    Is there a difference between the two technologies — where one technology
    is good for servers, while the other is 'not so good'? Or are they both essentially
    the same technology and not recommended?

    Thanks,

    -Steve


    >>> Steve Conrad<SConrad@ccmd.org> 2009-04-07 10:03 PM >>>

    I'm re-reading the "Using the Migration Wizard for NetWare servers" document,
    and suddenly noticed the section on "Preparing the Destination Server" /
    "Verify your BIOS configuration".

    It says . . . "Go into the server's BIOS and make sure you . . . disable hyperthreading
    if this is a server with hyperthreading support (Pentium 4 / Xeon class servers)."

    Is disabling hyperthreading only to do with the Migration — or is this the recommended
    setting for NetWare 6.5 servers?

    Thanks,

    -Steve


  • Steve,

    > I'm seeing the E5320 processor being described as a Quad-Core processor.


    Correct.

    > I'm also seeing it described as having Hyper-Threading.


    No, the 5320 does not support hyperthreading.

    > Is there a difference between the two technologies — where one technology
    > is good for servers, while the other is 'not so good'? Or are they both essentially
    > the same technology and not recommended?


    Multi core has multiple physical processor cores in a single processor
    package - multi core good. Hyperthreading creates 2 logical cores per
    physical core - hyperthreading bad.

    H.
  • Steve Conrad,
    > I'm seeing the E5320 processor being described as a Quad-Core processor.
    > I'm also seeing it described as having Hyper-Threading.
    >
    > Is there a difference between the two technologies — where one technology
    > is good for servers, while the other is 'not so good'? Or are they both essentially
    > the same technology and not recommended?


    They are different.

    dual core - that is a cpu with two physical cores

    hyper threading - that is one cpu with one core but lies to the operating system that
    it has two cores, multitasking based.

    The former of good, the latter is bad. Lying generally is ;)

    - Anders Gustafsson (Sysop)
    The Aaland Islands (N60 E20)

    Discover the Novell forums at http://forums.novell.com

    Novell does not monitor these forums officially.
    Enhancement requests for all Novell products may be made at
    http://support.novell.com/enhancement

  • Thanks for clarifying this.

    I need to check one more thing though:

    Under the Novell Remote Manager . . . the Processor Information
    shows:

    Processor 0 on line
    Intel(R) Xeon(R) CPU E5320 @ 1.86GHz
    Speed 1863 MHZ, Family 6, Model 15, Stepping 7
    Feature flags BFEBFBFF, CPUID: GenuineIntel
    L1 cache 64K Bytes, , L2 cache: 4096K Bytes, , L3 cache: 4096 K Bytes
    Logical CPUs (Hyper-Threading) per Physical CPU: 4 [Note this line.]
    Processor Initial APIC ID: 0

    .. . . etc., covering Processors 0 - 7.

    Is the "Hyper-threading" simply NRM's way of reporting
    the Multi-Core status? (The Migration Wizard document
    warned against "Xeon class servers", but the E5320 may
    represent a later class Xeon than the concerns of the
    document.)

    -Steve

    >>> Anders Gustafsson<AndersG@no-mx.forums.novell.com> 2009-04-08 12:57 PM >>>

    Steve Conrad,
    > I'm seeing the E5320 processor being described as a Quad-Core processor.
    > I'm also seeing it described as having Hyper-Threading.
    >
    > Is there a difference between the two technologies — where one technology
    > is good for servers, while the other is 'not so good'? Or are they both essentially
    > the same technology and not recommended?


    They are different.

    dual core - that is a cpu with two physical cores

    hyper threading - that is one cpu with one core but lies to the operating system that
    it has two cores, multitasking based.

    The former of good, the latter is bad. Lying generally is ;)

    - Anders Gustafsson (Sysop)
    The Aaland Islands (N60 E20)

    Discover the Novell forums at http://forums.novell.com

    Novell does not monitor these forums officially.
    Enhancement requests for all Novell products may be made at
    http://support.novell.com/enhancement



  • If you have dual, quad core then you have 8 processors in all. Let me
    check what NORM says on my servers in the morning.

    - Anders Gustafsson (Sysop)
    The Aaland Islands (N60 E20)

    Discover the Novell forums at http://forums.novell.com

    Novell does not monitor these forums officially.
    Enhancement requests for all Novell products may be made at
    http://support.novell.com/enhancement

  • Many thanks.

    >>> Anders Gustafsson<AndersG@no-mx.forums.novell.com> 2009-04-08 2:51 PM >>>

    If you have dual, quad core then you have 8 processors in all. Let me
    check what NORM says on my servers in the morning.

    - Anders Gustafsson (Sysop)
    The Aaland Islands (N60 E20)

    Discover the Novell forums at http://forums.novell.com

    Novell does not monitor these forums officially.
    Enhancement requests for all Novell products may be made at
    http://support.novell.com/enhancement