Archived from groups: alt.comp.periphs.mainboard.asus (
More info?)
Thanks for clarification,
the other system has 512 Mb also but it's a non-hyperthreading Pentium M
(it's a Dell notebook).
The application is a custom ocr forms recognition system written in C, that
uses intensive CPU while performing module recognitions.
I read that some Manufacturers (one of them is just Dell) leave the
Hyperthreading default INACTIVE on their P4 systems, because of lower
performance on most single tasking programs actually used. I read that most
of the tests performed don't show enough enhancements to justify
hyperthreading active...
Mirko
"Roger Hamlett" <rogerspamignored@ttelmah.demon.co.uk> ha scritto nel
messaggio news:i7ire.7698$a5.3625@newsfe5-win.ntli.net...
>
> "Mirko" <mirko@yack.com> wrote in message
> news:d8k94u$d93$1@newsread.albacom.net...
>> Thanks Roger,
>>
>> I've just read something about the hyperthreading technology, and surely
>> this is the reason for my slow perfoming app... RAM is at 512MB so surely
>> this is not a problem...
>>
>> Just one question, I could'nt find an exact answer for... As you
>> suggested I
>> should put /ONECPU on the boot.ini for testing, (I can't do this test
>> right
>> now because I can't restart the machine, but I will soon try...)
>>
>> Why do you say the setting in boot.ini is a 'temporarily' fix ? If this
>> solves my problem, is there any problem if I keep this setting instead of
>> reinstalling ?
>>
>> (On MS site it doesn't give any contraindication)
>>
>> Thanks again
> You would need to disable hyperthreading in the BIOS, and then try
> /ONECPU. With this done, though you will still be running the MP kernel,
> you will only be running one 'virtual' CPU, and this will have access to
> the full resources of the processor. /ONECPU, will stop XP from trying to
> use the second 'virtual' hyperthreading part of the chip, but unless the
> processor is switched to not use hyperthreading, it'll not have access to
> the full performance. Using the MP kernel, has a small extra 'overhead'
> when running in single processor mode.
> How much RAM did the other system have?. Without knowing what the
> application is, 512MB, could be very small indeed for some applications (I
> have a database, and a graphic application, that both bottleneck on
> memory, unless there is at least 2GB on the machine).
>
> Best Wishes
>
>> -- "Roger Hamlett" <rogerspamignored@ttelmah.demon.co.uk> ha scritto nel
>> messaggio news
5hre.19901$%21.4151@newsfe2-gui.ntli.net...
>>>
>>> "Mirko" <mirko@yack.com> wrote in message
>>> news:d8k5dm$604$1@newsread.albacom.net...
>>>> Hi all,
>>>>
>>>> I'm having a problem with a P5GD1 pro mb, mounting a P5 3 Ghz.
>>>> The matter is that I verified a program that needs lot of CPU
>>>> processing
>>>> actually runs slower than on a 1.5 Ghz system.
>>>>
>>>> I've seen on th etask manager that the system never allows it to gather
>>>> more than 50% of cpu...
>>>>
>>>> Inspecting Computer->Management->peripherals I found that my xp
>>>> configuration actually sees a TWIN processor but indeed the motherboard
>>>> doesn't carry any second CPU...
>>>>
>>>> I think slower performance is obtained because of the 2-cpu setting
>>>> .....
>>>>
>>>> Anyone knows what the problem is and how to solve it ? Is it a BIOS
>>>> known
>>>> problem ?
>>>> How can I set the system for single cpu ?
>>>>
>>>> Thanks for any precious hint
>>>>
>>>> Mirko
>>> Hyperthreading....
>>> This is seen as multiple processors, and your configuration is correct.
>>> It
>>> should not result in the program running this much slower, but there
>>> have
>>> been plenty of reports of some systems running a little slower than you
>>> would expect (perhaps 20%). There are some fairly important fixes in
>>> latter XP updates to make this work 'right', and you should try these
>>> before fiddleing. You should be able to disable HT in your BIOS, but you
>>> will then have to do a repair install of XP to safely switch to the
>>> single
>>> processor kernel. You can disable the MP support temporarily, by adding
>>> the text '/ONECPU' to the boot.ini line for your setup, so you could try
>>> this.
>>> This is one area where AMD pointedly claim that the overhead of
>>> hyperthreading, can make it work less well than a single threaded
>>> processor of the same speed for many applications, but I have never
>>> heard
>>> of it being quite as bad as for your system. Are you sure something else
>>> isn't the cause of the speed difference (less RAM for example)?.
>>>
>>> Best Wishes
>>>
>>>
>>>
>>>
>>
>>
>>
>
>
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