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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
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Re: Hyperthreading?

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
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Re: Hyperthreading?

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

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Hyperthreading vs. Quad-Core

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


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Re: Hyperthreading vs. Quad-Core

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.
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Re: Hyperthreading vs. Quad-Core

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

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Absent Member.

Re: Hyperthreading vs. Quad-Core

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



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Re: Hyperthreading vs. Quad-Core

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

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Absent Member.

Re: Hyperthreading vs. Quad-Core

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



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Re: Hyperthreading vs. Quad-Core

Steve Conrad wrote:

>
>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.)


The document really means Xeon processors based on a Pentium 4 core
(Netburst) . The term Xeon is a rather generic term Intel uses for high
end processors. The term Xeon has been used for at least 4 different
generations of processor architectures already: Deschutes (Pentium
II/III), Netburst (Pentium 4), Core and Nehalem

--
Marcel Cox
http://support.novell.com/forums
------------------------------------------------------------------------
Marcel Cox's Profile: http://forums.novell.com/member.php?userid=8
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Re: Hyperthreading vs. Quad-Core

Thanks, Marcel.

>>> Marcel Cox<Marcel_Cox@no-mx.forums.novell.com> 2009-04-09 9:23 AM >>>

Steve Conrad wrote:

>
>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.)


The document really means Xeon processors based on a Pentium 4 core
(Netburst) . The term Xeon is a rather generic term Intel uses for high
end processors. The term Xeon has been used for at least 4 different
generations of processor architectures already: Deschutes (Pentium
II/III), Netburst (Pentium 4), Core and Nehalem

--
Marcel Cox
http://support.novell.com/forums
------------------------------------------------------------------------
Marcel Cox's Profile: http://forums.novell.com/member.php?userid=8


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Re: Hyperthreading vs. Quad-Core

Anders, did you get a chance to check your servers?

(I'm assuming NoRM's "Hyper-Threading" reference
is a misnomer — and that it won't affect how NetWare
handles its Multi-Processor work-load.)

-Steve

>>> 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



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