TPU's WCG/BOINC Team

mstenholm · Dec 11, 2012

johnspack said:
Just a query.. when I crunch my 480, I get like over 90% cpu usage on 1 thread, and almost nothing on the others.. anyway to get more threads to feed the 480?

I did see that KieX replied but I'm not sure if he understood the question as I think you meant it. No, you can not allocate more "CPU power" to each running GPU instance. One CPU tread is maximum for one GPU WU. I'm sure that KieX will agree on that. You can use less CPU (good if you have dual core and a 7990 in the same rig) but not the other way around.

BUCK NASTY · Dec 11, 2012

I may have to snag a couple of 7770's if there is 6 months left of GPU wu's. :toast:

mstenholm · Dec 11, 2012

BUCK NASTY said:
I may have to snag a couple of 7770's if there is 6 months left of GPU wu's.

Sold out... :laugh:

brandonwh64 · Dec 11, 2012

On a dual core CPU would I only be able to run two WU for two GTS 450s or two WU PER GTS 450?

mstenholm · Dec 11, 2012

brandonwh64 said:
On a dual core CPU would I only be able to run two WU for two GTS 450s or two WU PER GTS 450?

In principle you could run 10 GPU units on each of your 450s but I doubt it would work (errors). You might be able run 2 x 2 (two on each with a dual) but only a test would show. My limited experience showed that running 1 GPU on a 450 was hard enough if you needed to see was was going on at your monitor. Here the CPU would not be the limiting factor but the GPU.

brandonwh64 · Dec 11, 2012

Well this PC will not be used for anything other than crunching so its usability is not a concern. I just wonder what these two would output with 2 WU a piece?

Chicken Patty · Dec 11, 2012

I'll consider some 7770's in the. ESR future then. Seems like they scale really well in Crossfire?

brandonwh64 · Dec 11, 2012

Chicken Patty said:
I'll consider some 7770's in the. ESR future then. Seems like they scale really well in Crossfire?

Looks like it. I have two 6950's in xfire and love it!

*EDIT*

Look what I finally figured out!!

[Ion] · Dec 11, 2012

I'm now home for winter break :toast:

I brought my i7-920/HD7770 system, the i3 with a GTX470, and my i7 laptop. I also have the Atom, but the replacement HDD I brought is also bad, so it's out of commission until tomorrow. Everything is running now--I'll be shutting down the rest of the systems at school in about 60 hours.

HammerON · Dec 11, 2012

Chicken Patty said:
I'll consider some 7770's in the. ESR future then. Seems like they scale really well in Crossfire?

My only concern would be the lack of memory on those cards. I have only seen one 7770 (ASUS) that had 2GB. All the others only have 1GB...

brandonwh64 · Dec 11, 2012

Yea I agree with hammeron, I would get the 2GB cards.

Norton · Dec 11, 2012

brandonwh64 said:
Yea I agree with hammeron, I would get the 2GB cards.

7770's are only 128 bit cards... can they even use 2GB of memory effectively?

Mindweaver · Dec 11, 2012

Yea, I agree with Norton. I'd get a 7850 2gb with a 256-bit interface for another 40-50 bucks and get two free games (two worlds, Sleeping dogs). The only 2gb 7770 is $144 with no games.. Plus, you'll be able to push that 7850 to 1ghz as well. :toast:

EDIT: I believe the sweet spot for me would be the 7870 ghz here it has a really good aftermarket hsf and it's clocked at 1.1ghz out of the box for $229.99 w/ 2x games.

johnspack · Dec 11, 2012

mstenholm said:
I did see that KieX replied but I'm not sure if he understood the question as I think you meant it. No, you can not allocate more "CPU power" to each running GPU instance. One CPU tread is maximum for one GPU WU. I'm sure that KieX will agree on that. You can use less CPU (good if you have dual core and a 7990 in the same rig) but not the other way around.

Heh, think I found the problem, accidentally had 2 boinc managers going on same box...
Also, found my cruncher was out of gpu wus again, have to increase cache again. Just made a sizable dump, will be interesting to see what I get.

ace80 · Dec 11, 2012

[Ion] said:
Awesome!

Can you post a screenshot of BOINC running?

Let us know if you have any questions--I'm here to serve

Here you go Ion

Sorry its been a couple of days, busy days this time of year, so i left it running over night and all of today.

My gpu is running stock and has done for most of its life, only the occasional oc for benching but its been a while and they weren't high oc's by any means. I noticed today that 3 results finished with computation errors, i hope its not a sign of a dying card?

johnspack · Dec 12, 2012

Does anyone know what weirdness this is? It starts out with 4 gpu wus and 8 cpu wus, and now it's doing this?

Oh, and it seems to have paused the bottom cpu wu... which makes sense since only 12 wus should be running...
but why did it load it up like that? Weird.

BUCK NASTY · Dec 12, 2012

Pete, post the far right side of the client so we can see the status of the WU's. Also post the script your using in the XML file.

Team: Just brought over both Opty rigs, so it should get interesting in the next couple of days!

:toast:

johnspack · Dec 12, 2012

Okay, I'm now quite confused.. should have 8 cpu wus and 4 gpu wus running, seems I don't:

app info is unchanged from the one I got here...

BUCK NASTY · Dec 12, 2012

johnspack said:
Okay, I'm now quite confused.. should have 8 cpu wus and 4 gpu wus running, seems I don't:
http://img.techpowerup.org/121211/boinc2.png
app info is unchanged from the one I got here...

8-core CPU? Everything looks fine to me. 2 WU's per Card and the 4 leftover CPU cores are running CPU wu's. If you make changes midstream to the app file, the client will adjust accordingly and pause the WU's. You should not have any partially completed GPU wu's any longer, correct?

KieX · Dec 12, 2012

johnspack said:
Okay, I'm now quite confused.. should have 8 cpu wus and 4 gpu wus running, seems I don't:
http://img.techpowerup.org/121211/boinc2.png
app info is unchanged from the one I got here...

Is it a 12 thread CPU? If so these values would be wrong:

Code:

<avg_ncpus>1.0</avg_ncpus>
      <max_ncpus>0.783972</max_ncpus>

If you change it to:

Code:

<avg_ncpus>1.0</avg_ncpus>
      <max_ncpus>1.0</max_ncpus>

That should fill up the 8 remaining CPU cores from the 4 used by 2x GPU with 2 WU

johnspack · Dec 12, 2012

Well, it's 8 threads. So 4 threads get used up for the gpus? Didn't know that.
Oh, and I increased the work cache, last time I did that it did this too....
Edit: and yes Buck, it cleared out the gpu wus, and now just shows 4 gpu wus and 4 cpu wus...
Edit2: man I need a hex core....

BUCK NASTY · Dec 12, 2012

johnspack said:
Well, it's 8 threads. So 4 threads get used up for the gpus? Didn't know that.
Oh, and I increased the work cache, last time I did that it did this too....

What cards are you running? Looks like GTX2XX?

KieX · Dec 12, 2012

johnspack said:
Well, it's 8 threads. So 4 threads get used up for the gpus? Didn't know that.
Oh, and I increased the work cache, last time I did that it did this too....

Well, that's what gives you best performance. You can specify how much of a core to use by changing the avg_ncpu value.

I think what's happening is that your setup is possibly competing for the CPU threads. So it starts the GPU, then hands off to the CPU one, making the GPU run late and go into high-priority.

If you swap to the 1-1 you will have 4 threads locked to GPU and 4 threads locked to CPU. Should mean you get the full GPU performance and an i5 level of CPU output.

Code:

<avg_ncpus>1.0</avg_ncpus>
      <max_ncpus>1.0</max_ncpus>

BUCK NASTY · Dec 12, 2012

KieX said:
Well, that's what gives you best performance. You can specify how much of a core to use by changing the avg_ncpu value.

I think what's happening is that your setup is possibly competing for the CPU threads. So it starts the GPU, then hands off to the CPU one, making the GPU run late and go into high-priority.

If you swap to the 1-1 you will have 4 threads locked to GPU and 4 threads locked to CPU. Should mean you get the full GPU performance and an i5 level of CPU output.

Code:

<avg_ncpus>1.0</avg_ncpus> <max_ncpus>1.0</max_ncpus>

KieX,

Do the Nvidia GPU's require more CPU cycles than ATI?

KieX · Dec 12, 2012

BUCK NASTY said:
KieX,

Do the Nvidia GPU's require more CPU cycles than ATI?

Nope there's no difference in that respect. The default is 1 GPU thread uses 1 CPU thread. If the total number of GPU WU is less than your CPU core count.. best to go 1-1 imho for best output.

EDIT: If you assigned more cores to a WU it would probably make no difference either since all jobs are single threaded AFIK

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