i have 4 computers all on one project. one off the computers has two units running at once.

how can i run two work units at the same time on the other three computers
or has it got to do with the speed of the computer with two work units running because thats a faster computer than all the rest. Hard to explain sorry..

Anyone

I would suspect that your workstation that can run 2 work units at the same time has a Pentium 4 with Hyperthreading for its CPU.

This processor emulates a 2nd virtual CPU, which BOINC can take advantage of.
The option to use parallel CPU's if available is set on by default in your BOINC preferences.

If your other workstations don't have Pentium 4 CPUs, then you're out of luck unless they have motherboards with 2 physical CPUs. Also be aware that some models of the Pentium 4 don't have the Hyperthreading feature, and therefore cannot emulate a 2nd CPU.

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> I would suspect that your workstation that can run 2 work units at the same
> time has a Pentium 4 with Hyperthreading for its CPU.
>
> This processor emulates a 2nd virtual CPU, which BOINC can take advantage of.
> The option to use parallel CPU's if available is set on by default in your
> BOINC preferences.
>
> If your other workstations don't have Pentium 4 CPUs, then you're out of luck
> unless they have motherboards with 2 physical CPUs. Also be aware that some
> models of the Pentium 4 don't have the Hyperthreading feature, and therefore
> cannot emulate a 2nd CPU.

alphax

How do you tell if a Pentium 4 processor has Hyperthreading?

I have a P4-2.67GHz HP Pavilion running WinXP with SP2, but can't see Hyperthreading mentioned in the OS anywhere. The only clue may be in the System Properties > Hardware > Device Manager > under Computer *t says "ACPI Multiprocessor PC" ... any ideas? thanks.

:)

Ni!

http://www.intel.com/products/ht/hyperthreading_more.htm

Don't think my PC has HT, oh well.

:)

Ni!

How can you tell?

Well there might be a label on outside of PC...

If not..then try a CPU Identification program...such as

www.cpuid.com. They have a couple..but the simplest is http://www.cpuid.com/download/cpu-z-124.zip.

Will tell you HT ability, MHZ speed, Development name of CPU (ie Barton, Clawhammer, Prescott)

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> I have a P4-2.67GHz HP Pavilion running WinXP with SP2, but can't see
> Hyperthreading mentioned in the OS anywhere. The only clue may be in the
> System Properties > Hardware > Device Manager > under Computer *t
> says "ACPI Multiprocessor PC" ... any ideas? thanks.

That should be it ... :)

The others should/will say "ACPI Uniprocessor PC" ...

THough it is possible to confuse the OS sometimes to say it is "multi-" when it should be "uni-" but this is rare with XP.

Your other clue is to CTL-ALT-DEL and then look at the CPU Usage on the "Performance" tab; on the uniprocessors you will see one grapph of CPU usage... on HT machines with HT enabled (in the BIOS) you will see two graphs.

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Thanks.

Pentium 4 sticker on PC has no mention of HT.

No mention of HT in the BIOS either.

Just the one CPU Usage Graph ... flat lined at 100%

The CPU-Z software reported...
- Name: Intel Pentium 4
- Code Name: Northwood
- Instructions: MMX, SSE, SSE2

I guess WinXP is just confused (nothing new) and my PC does not have HT.

Ah well, 1 WU at a time then.



Ni!

> Thanks.
>
> Pentium 4 sticker on PC has no mention of HT.
>
> No mention of HT in the BIOS either.
>
> Just the one CPU Usage Graph ... flat lined at 100%
>
> The CPU-Z software reported...
> - Name: Intel Pentium 4
> - Code Name: Northwood
> - Instructions: MMX, SSE, SSE2
>
> I guess WinXP is just confused (nothing new) and my PC does not have HT.
>
> Ah well, 1 WU at a time then.

You have to start somewhere ... Heck I can recall the days when all I had was one computer ... :)

I also had to walk uphill to school in blizzards ... true ... District 833 in Minnesota ... we were always the last district to close ... they would hold classes till 1 to get the state money ... then send us home ... Some kids on the busses would spend half the day getting to school (busses followed the plows) and then turn right back around to get home ...

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There might still be hope.

From what I've heard, you have to turn on the HyperThreading feature in your BIOS settings in order for Windows to recognize it.

> http://www.intel.com/products/ht/hyperthreading_more.htm
>
> Don't think my PC has HT, oh well.
>
> :)
>
> Ni!

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