DISABLE HYPER-THREADING!!!

In this topic (http://discussions.apple.com/thread.jspa?messageID=1429910#1429910) jimsg4 suggested disabling Hyper-Threading. I did so, using the System Manager in WindowsXP, which is rebooting and hitting F2 when you get the startup screen, then navigating down to Hyper-Threading, and turning it off. That fixed all iPod/iTunes freezing problems, now it works like it should. So, if you have Hyper-Threading enabled in your box, try disabling it. That was an amazing shot in the dark, thanks jim!!!
c.

I'm still here, still using the same software, but still no answer. Has anyone any idea how to sort it out?
Thanks!

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Satellite A500- Is there a way to disable Hyper-Threading technology (HTT)?

Is there a way to disable Hyper-Threading technology (HTT)?
It is really bothering me with some apps,..
I cannot seem to find it in bios,..1.5,.. was it in earlier bios?,.. is there a way to roll back,..
Is it even possible,..
Message was edited by: rekof

I know that, but why would toshiba lock it out in the bios 1.5 ,.. even Intel suggest disableing it,.. Its for future proofing,.. for now it does more harm than good,.. for some users atleast,..
Hope we get this option in next bios,.. I would understand if it would be harmful for a product,.. but it is not,..

License requirements with hyper-threaded CPUs?

We have purchased a production license for Enterprise edition for a max of 3 CPUs. When we attempt to start Coherence on a production platform (dual hyper-threaded Xeon) we get the following licensing error: "2004-08-21 10:51:40.906 Tangosol Coherence 2.3/273 (thread=Cluster, member=n/a): The number of CPUs used exceeds the maximum number allowed by the license." We are only using two physical CPUs.
We disabled hyper-threading and Coherence started successfully. Is hyper-threading confusing the licensing mechanism by making it appear as though we are using 4 CPUs? If so, is there some method by which we can configure Tangosol to work around this issue or are we forced to purchase an additional CPU license?
Thanks in advance!

Hi Andy,
I have emailed you the necessary production command line argument to resolve this issue.
Later,
Rob Misek
Tangosol, Inc.

Z77a-gd65 supports hyper-threading?

I have seen in some sites in Internet that the z77a-gd65 supports hyper-threading, but there is no mention of it in the MSI official site nor any BIOS option to enable and disable hyper-threading is described in the manual
Do you guys know whether multi-threading is supported or not?
Thank you very much in advance for your reply!

Thanks Froggy Gremlin for your reply.
There is no shot of this subsection. In page 2-10 there is a shot of the "OC Section" and in page 2-15 a reference to a read only CPU specification sub-menu, but no reference to the HT-setting at all. Maybe I am reading an outdated manual, but it is the one from the official MSI site at //download2.msi.com/files/downloads/mnu_exe/E7751v2.2.zip
But if you have the mainboard and you know there is this option, I trust your word. I am probably buying it but wanted to know before if this option was available.

Oracle Linux 6.2 - hyper-threading

Hello
two simple questions, I hope 8^)
if I installed OL 6.2 and then also upgraded to UEK R2, on X64 Intel server - both tasks done with hyper-threading enabled and then I want to disable hyper-threading after OS installation - do I need to make any OS system/parameter changes at Linux OS level or simply turn off H/T at hardware level and reboot the server ?
is there general recommendation re when H/T is beneficial on Oracle Linux with UEK ?
what about if I added more RAM to the same 64-bit Intel server? Any Linux OS changes required to get all RAM recognised by OS ?
thanks!

A recommendation does not mean the absolute best solution for every situation. There has been no information about any particular software deployment or even the particular CPU in question.
I agree with you that enabling or disabling HTT in regard to achieving the best possible performance for a particular scenario is subject to testing. But, if someone asks me what is the recommendation about HTT in regard to Oracle UEK kernel, and possibly Oracle RDBMS, my suggestion is to use the default and leave HTT enabled. I'm not aware of any documentation that suggest to generally disable HTT when using Oracle. Saying "it depends" is scientifically correct, but not helpful.
There are already plenty of discussions about HTT on the net. You can turn HTT off and experience a performance increase, but there is also a chance the performance was even better with HTT enabled in a properly configured system or application. There are cases were HTT apparently slows down performance, but drawing a conclusion about enabling or disabling HTT in regard to performance is often too simple due to many other factors that can interfere with the results.
Dude the link you supplied referenced some old ibm information.Well, Hyper-Threading isn't a new feature.
For what it's worth, check out http://en.wikipedia.org/wiki/Hyper-threading in particular "Drawback history".
Or http://www.intel.com/support/processors/pentium4/sb/cs-017371.htm#1c which also links to more performance info.

Disable Intel CPU Hyper threading in Oracle RAC environment

Dear Expert,
Does disable CPU hyper threading will have direct impact or maybe unexpected behavior to Oracle RAC database?
Actually the background of this question is we have many received packet queuing on the network layer waiting to be processed. Investigation leads to the processor utilization which shows that many processor are still in idle state or not used when the other processors are busy processing incoming request.
I have visited some oracle note like
CPU Count Consideration for Oracle Parameter Setting When Using Hyper-Threading Technology (Doc ID 289870.1)
Oracle and Hyper-Threading (Doc ID 205089.1)
Using PROCESSOR_GROUP_NAME to bind a database instance to CPUs or NUMA nodes (Doc ID 1585184.1)
These document already give useful information but i wonder if there is any possibilities risk or another consideration of disabling cpu hyper threading.
Please let me know if any other information required.
Thanks.
Best Regards,
Jolly

As far as I know it is set as cpu architecture and mobile chips don't have the option. Not 100% as I've never needed to do it.
Better bet would be to check Intel ark and forums with them I expect.

Unable to detect Hyper Threading of CPU SL6WE 3.2 in MSI-865PE Neo2

Hi! I am new to this forum and need some help. I have just installed a Intel Pentium 4 3.2GHz Northwood SL6WE 478 800MHz/512k . I bought this on e-bay and understand that this cpu supports hyper threading. I have enabled hyper threading in the bios, but only see one cpu in Widows System Properties and only one cpu in Windows Task Manager. I had a 2.6 cpu installed previously, no hyper threading. My motherboard is an MSI-865PE Neo2 version 1.1, 2GB Ram ( 4x512 ?), Thermaltke TR2-430W power supply, Freezer 4 Arctic Cooler, Nvidia GeForce 6600, LG DVD RAM burner, 16x DVD ROM, WD 250 gig and an Hitachi 80 gig hard drive. I also used Arctic Silver 5 thermal paste (after using Arcticclean and Surface Purifier). Have I missed somethig? Would appreciate help in solving why I have no hyper threading.

200 7-3-3-2.5 Ultra Turbo and 212 5-3-3-2.5 Ultra Turbo is a
no boot. Thinks ultra-turbo tries to set mem timings to
2-2-2-5 below 218FSB and my memory can't do that.
Turbo boots ok. Normal setting disabled PAT.
200 2.5-3-3-7 Turbo PAT on 4.6GB/s
200 2.5-3-3-7 Normal PAT off 4.2GB/s
212 2.5-3-3-5 Turbo PAT on 4.8GB/s
212 2.5-3-3-5 Normal Pat off 4.5GB/s
Also tried 250 1:1, not prime95 stable
250 2.5-3-3-7 Ultra-turbo 6GB/s
I think pat is disabled above 218FSB on
1:1 and 5:4 setting, but not on 4:5 setting.
You should get close to or above 6GB/s at
1:1 250 3-3-3-5 bios overclocking.
Maybe something is running in the background
stealing cpu power or something?
Well, you have to test some more, maybe a
fresh windows setup will help?

Once and for all: Hyper-threading, turbo boost on Core i5 MBA?

Hey, all.
There is a lot of conflicting information on whether the new Core i5 MacBook Airs (as opposed to the upgraded Core i7 options) support hyper-threading. As best I can gather, there is still no "official" Apple statement on the subject. I thought I'd gin up another conversation in the event someone has more definitive information. In case anyone wants a fresh bit of provocation, earlier today I asked one of Apple's online "Live Chat" experts. Here's what she said:
The Core i7 offers Triple Channel memory, hyper-threading, and full dual 16x video bandwidth.
But the i5 doesn't offer the TurboBoost or hyperthreading.
You would have to do the upgrade to the i7 for that.
Agree? Disagree?

Here is a comparison of the three processors used for the 2011 MBA.
It would appear that the i5 does have Turbo Boost (and Hyperthreading), unless Apple's specification calls for disabling TB.
But, if we look at some of the benchmark testing, the results would seem to imply that the specification only differs by the differences shown in these charts, hence Turbo Boost would be evident across all the Airs.

845PE Max2 & Hyper Threading in BIOS?

Hi all.
I know i dont have a Hyper Threading CPU
but i dont have the option in my BIOS,why?
Im using the latest bios v1.2.
Shouldnt it be an option for it,like the manual says?

MSI 845PE max2 (MS-6704) bios 1.2
has HT-function enable/disable in
in Advanced bios features -menu.
It may require DDR333 , bur I'm not sure.
It's different thing, when you enables it without 3,06 GHz cpu, works it or not. Maybe not...
Quote
Originally posted by preducer
there is no option on HT in the bios.... so how am i supposed to know whether the hyper-threading is functioning... :(

Intel HT (Hyper-Threading) BIOS 1.9?

Sup People!
My Intel HT (Hyper-Threading) don't work right now, what to do?
I was told that I need the new BIOS 1.9 for HT to work?
I have: Intel P4c with HT
Intel 875P with HT
MS Windows XP Professional Version 2002 & SP 1
There is no option button in the BIOS 1.8 for HT!
What do I need to do? Please Help
TaZ ...
Also I have a new OVER CLOCK speed! MY 875P NEO @3420MHz/1140MHz FSB !!
It's a old thread so look at post #7
http://www.msi.com.tw/program/service/forum/index.php?sid=&postid=188033#post188033
TaZ

Sup & THX people for all the INFO!
Hay Schiers,
"I can switch it on and off like I want. The option to allow/disallow it is about
MP (advanced settings) and the version to support."
I have a Intel SL6Z3 Pentium 4c 2.4GHz 800MHz FSB with HT. This new chip come's with the NEW MO core stepping. (Costa Rica) Now Im trying to over clock this Vcore 1.70v CPU to 275MHz FSB (3.3GHz/1.1GHz FSB) 5:4 ratio, Ram 2.70v DDR440 - 220MHz @CL2.0-3-3-7-8 with my PC3500, AND WITH HT (HYPER-THREADING)
Right now my Vcore 1.60v CPU and 225MHz FSB @(2.7GHz/900MHz FSB) 1:1 ratio Ram 2.70v DDR450 - 225MHz @CL2.5-3-3-7-8 and NO HT (Hyper-Threading) On Intel STOCK Air.
I have also tryed Vcore 1.6 CPU and 260MHz FSB @(3.12GHz/1.04GHz FSB) 5:4 ratio, RAM 2.60v DDR416 - 208MHz @CL2.0-3-3-6-8 and NO HT (Hyper-Threading) On Intel STOCK Air.
http://www.msi.com.tw/program/service/forum/index.php?threadid=32697&sid=
PLEASE HELP ME! GET HT (Hyper-Threading) WORKING!
Please show how to do it step by step please
I have BIOS 1.8 (Bugy) Need Bios 1.9 for new microcode update to get HT properly recognized with an option!
OR IS THERE ANOTHER OPTION?
TaZ

Oracle support Intel Hyper Threading??

Does anyone know if the Oracle 9i and 10g database supports Intel's new Hyper Threading technology???

Cody,
Please read Oracle's Note:205089.1 on metalink.

Negative Impact of Hyper Threading and Essbase

Hi,
It has come to my attention that on some Hyperion Apps, it is NOT recommended that Hyper Threading is used. Can anyone clarify this? I have searched Oracle and have found nothing concrete on this subject.
Thanks,
Sam

Hi Sam,
I didn't know anything about this issue so I asked some of my friends at Oracle.. Here are a couple of tidbits I dug up:
"For production environment, as you aware of, Essbase Calculation Engine is one of the world's most advanced number-crunching engines. And usually number crunching applications require intensive floating-point computations; therefore, to get the best performance, expend your resources to acquire the fastest CPU you can. Opt for a faster CPU instead of better L2 and L3 cache, if you have the money, go for the better L2 cache first and then better L3 cache. Note that L2 and L3 cache make a much bigger difference in OLAP applications than in OLTP applications (please note, Essbase does not utilize hyperthreaded CPUs or Hyper-Threading Technology)."
Another tidbit:
"As to hyperthreading,we have not had any real issues with it. The only thing that really ends up being a problem is that hyperthreading seems to limit the available memory".
So, unofficially, there are a couple of pieces of information for you.
Tim Tow
Oracle ACE
Applied OLAP, Inc

Negative Impact of Hyper Threading and HFM

Hi,
It has come to my attention that on some Hyperion Apps, it is NOT recommended that Hyper Threading is used. Can anyone clarify this? I have searched Oracle and have found nothing concrete on this subject.
Thanks,
Sam

As previously stated, Hyperthreading is not recommended for Hyperion, as it does not provide any real performance value. Additionally, for Hyperion Financial Management, there have been documented support cases of problems with Hyperthreading causing problems with consolidations. Below is an excerpt from the HFM 9.3.1 readme
"HyperThreading is not recommended for application servers running on Windows 2000 Server; however, Advanced Windows 2000 Server and Windows 2003 Enterprise Edition are supported."
As a general rule when tuning/building a System 9 infrastructure, Hyperthreading should be turned off on all Hyperion servers.
Thanks!

Negative Impact of Hyper Threading and Planning

Hi,
It has come to my attention that on some Hyperion Apps, it is NOT recommended that Hyper Threading is used. Can anyone clarify this? I have searched Oracle and have found nothing concrete on this subject.
Thanks,
Sam

As previously stated, Hyperthreading is not recommended for Hyperion, as it does not provide any real performance value. Additionally, for Hyperion Financial Management, there have been documented support cases of problems with Hyperthreading causing problems with consolidations. Below is an excerpt from the HFM 9.3.1 readme
"HyperThreading is not recommended for application servers running on Windows 2000 Server; however, Advanced Windows 2000 Server and Windows 2003 Enterprise Edition are supported."
As a general rule when tuning/building a System 9 infrastructure, Hyperthreading should be turned off on all Hyperion servers.
Thanks!

I can't see hyper threading function in my bios

I have a CPU celeron 2,4 ghz, MB 865pe neo2 LS. Problem is I can't see hyper threading function in my bios(ver. 1.5)

kowno,
I know Celerons are not ht cpu's but I want to know if that it's normaly or it's a problem with my MB.
thanks!!

DISABLE HYPER-THREADING!!!

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