DPAD: Multiple CPUs

[Darkone]

So I was having a discussion about DPAD with Mark (Assimilator1), in the pub last night. Almost all of the machiens in my companys lab, that I have DPAD installed on, are hyperthreaded Xeons. A few of them have 2 or more CPUs in them.

At present I'm just running 1 client on the machines and seeing the machines running at 99%.

Am I getting the most from these machines or should i be running a client on each physical cpu/core ?

I was assuming, that based on the fact the machines were running at max cpu, that muon1.exe was using the maximum resources in the machine already.

 

[Fullmetal Chocobo]

When I was running my dual Xeon setup, I didn't notice a large enough difference between running 1 and running multiple instances--definitely not a large enough delta to warrant the trouble... YMMV.

 

[TurtleBlue]

I found this to be the case also Fullmetal Chocobo

Whether my 3.06 Intel Northwood was set up non-hyperthreaded and hyperthreaded the results were basically similar when runnig dPad and SoB

I just built a budget dual-core midtower AMD box from spare parts & new pieces to basically run dPad - with a slight adj in cmos settings my output is avg about 345. The very strange thing I noticed was that when I ran F@H on my 3.06 hyperthreaded enabled box the 1st cpu listed under Windows Task Master Performance tab was running at 100% cpu utilization and the 2nd cpu was running at around 15% with only one instance of F@H running. On the new box both cpu's were showing about 97% utilization with only One dPad program running.

Another note: When running the 3.06 w/hyperthreading for 2 instances of F@H the results for each were evenly balance outputs while running 2 instances of dPad on the new build one will output like 75% and the other dPad will output 25%. Once in a while they would balance out but usually their outputs were out of phase. :roll:

Below is a list of the new build that I posted in the cpu group concerning thermal grease...

Am setting up a budget box using a DOA Athlon 1.0ghz Thunderbird that I built for my nephew some years ago. Reusing the Inwin 500 Miditower, floppy, a Plextor 716 burner I had laying around, an Antec 20 pin power supply, Windows XP O/S and a round Primary/Secondary IDE cable.

New budget items to complete the build:
Zalman CNPS9700LED
ASRock AM2NF6g-VSTA mobo
AMD 1.9ghz brisbane AM2 cpu
Seagate 80 gig Sata2 perpendicular drive
and a Crucial Ballistix DDR2 PC2-6400 1gig kit (512MBx2)

btw, what garage sale did lizardth pick up that CRAY that she is now posting some increadible numbers for dPad! :shocked:

 

[Rudy Toody]

FLOPS Slingers is running eight separate processes on their four FX-60s. Each machine shows 100% with each core at 50%. Works like a champ!

 

[petrusbroder]

DPAD uses all the power it can get.

You can set the number of processes in the config.txt file - if it is set to "auto", it will detect all the CPUs there are (incl. hyperthreaded ones) and use them all - and it does not matter if it is one dual core or four single core processor.

In my experience (running Intel P-IV and AMD X2) the difference using one vs. two instances of muon1.exe is very small indeed - less than 3%.

@ Lizardth's crunching: it may be that some other cruncher is adding points to her name - it is so simple: just put any name (e.g. [TA]Petrusbroder) into the user.txt-file...
OTOH: Liz may have at last crunch 24/7 and she has a powerful cruncher...

 

[Rudy Toody]

Originally posted by: petrusbroder
@ Lizardth's crunching: it may be that some other cruncher is adding points to her name - it is so simple: just put any name (e.g. [TA]Petrusbroder) into the user.txt-file...
OTOH: Liz may have at last crunch 24/7 and she has a powerful cruncher...

It is a puzzle!

 

[Rudy Toody]

Originally posted by: petrusbroder
You can set the number of processes in the config.txt file - if it is set to "auto", it will detect all the CPUs there are (incl. hyperthreaded ones) and use them all - and it does not matter if it is one dual core or four single core processor.

In my experience (running Intel P-IV and AMD X2) the difference using one vs. two instances of muon1.exe is very small indeed - less than 3%.

We set the number of processes to 1 in each config.txt file. We have 2 directories on each machine. This uses that 3%, which with our production is about 6600 Mpts/day.