Very low credits for intel_gpu

den777
den777
Joined: 29 May 13
Posts: 9
Credit: 16,512,552
RAC: 0
Topic 197956

BRP Arecibo on Nvidia GTS450 earns 1000 credits every hour.
Intel_gpu version on HD4600 earns 62 credits every 1,5 hour.
25 times worse!
However, according GPUs' performance the difference should be no more than 3-4 times (like I see in SETI).
Or BRP algorithm on Intels is so ineffective?

Richard Haselgrove
Richard Haselgrove
Joined: 10 Dec 05
Posts: 2,041
Credit: 745,066,399
RAC: 1,252,136

Very low credits for intel_gpu

It's actually a slightly different problem, with the run times.

The Intel GPU application is very sensitive to CPU usage: if your CPU is 100% utilised by 4 BOINC tasks, performance plummets. If you reduce the number of CPU tasks by one ("On multiprocessors, use at most 75% of the processors"), you will see much lower runtimes: my very similar host 8864187 turns out those 62-credit tasks every 11 minutes.

Be warned that there are currently some as-yet unexplained validation (accuracy) problems with HD 4600 GPUs and some driver versions. Keep an eye on the BRP4 Intel GPU app feedback thread at the top of the 'Problems and Bug Reports' area.

den777
den777
Joined: 29 May 13
Posts: 9
Credit: 16,512,552
RAC: 0

Thank you. It's really weird

Thank you. It's really weird app, doesn't eat cpu but requires one free core...

ravenigma
ravenigma
Joined: 20 Aug 10
Posts: 69
Credit: 80,528,946
RAC: 0

Yes, I recently started

Yes, I recently started crunching on i7-3770k/HD 4000 with CPU usage at 75%. I typically finish Einstein Intel GPU WUs in 12 - 12,5 minutes.

Bikeman (Heinz-Bernd Eggenstein)
Bikeman (Heinz-...
Moderator
Joined: 28 Aug 06
Posts: 3,516
Credit: 470,915,944
RAC: 54,615

It's worth noting that the

It's worth noting that the credit granting is really "apples-to-apples" in all respects:

* the intel GPU OpenCL and ATI/AMD app versions are actually identical. The executable is just renamed. NVIDIA is different tho, of course (CUDA).

* the data that is crunched by the 'different' BRP4 apps is actually the same, just the "bundling" of the workunits is different: Intel GPU (and Android and ARM-Linux CPU ) tasks are "atomic" while the BRP4(G) workunits for NVIDIA and AMD GPUs consist of a "bundle" of several such tasks, and the factor in granted credit is this number of bundled tasks.

HB

ravenigma
ravenigma
Joined: 20 Aug 10
Posts: 69
Credit: 80,528,946
RAC: 0

RE: It's worth noting that

Quote:

It's worth noting that the credit granting is really "apples-to-apples" in all respects:

* the intel GPU OpenCL and ATI/AMD app versions are actually identical. The executable is just renamed. NVIDIA is different tho, of course (CUDA).

* the data that is crunched by the 'different' BRP4 apps is actually the same, just the "bundling" of the workunits is different: Intel GPU (and Android and ARM-Linux CPU ) tasks are "atomic" while the BRP4(G) workunits for NVIDIA and AMD GPUs consist of a "bundle" of several such tasks, and the factor in granted credit is this number of bundled tasks.

HB

Thanks for the clarification.

I came to this conclusion a few days ago when I saw that my Nvidia card was receiving "bundles" of 16 files which had the same naming convention as those my iGPU is receiving. 1000 credits (what the Nvidia card is awarded) / 16 = 62.5, which is the credits earned by the iGPU per task.

den777
den777
Joined: 29 May 13
Posts: 9
Credit: 16,512,552
RAC: 0

Found the way to run IntelGPU

Found the way to run IntelGPU task at full speed without free cpu core. Just set priority to "Realtime" in Process Explorer, and Intel gpu usage became 96% instead of usual 15-20%. Run time decreased to 12 minutes.

Richard Haselgrove
Richard Haselgrove
Joined: 10 Dec 05
Posts: 2,041
Credit: 745,066,399
RAC: 1,252,136

RE: Found the way to run

Quote:
Found the way to run IntelGPU task at full speed without free cpu core. Just set priority to "Realtime" in Process Explorer, and Intel gpu usage became 96% instead of usual 15-20%. Run time decreased to 12 minutes.


Was the machine usable (normal desktop interaction, and typical daily tasks like browsing) with that setting?

den777
den777
Joined: 29 May 13
Posts: 9
Credit: 16,512,552
RAC: 0

Didn't mention any screen

Didn't mention any screen lags or so. Even on secondary display attached to intel video (primary on nvidia). That app actually doesn't use CPU (less than 1%), so everything ok.

Richard Haselgrove
Richard Haselgrove
Joined: 10 Dec 05
Posts: 2,041
Credit: 745,066,399
RAC: 1,252,136

I'll give it a try on my

I'll give it a try on my Haswell, which uses the iGPU to driver the monitor as well. But I'll need to wait for the uploads to clear, before I can download some more work.

Alex
Alex
Joined: 1 Mar 05
Posts: 451
Credit: 386,445,954
RAC: 241,659

RE: Found the way to run

Quote:
Found the way to run IntelGPU task at full speed without free cpu core. Just set priority to "Realtime" in Process Explorer, and Intel gpu usage became 96% instead of usual 15-20%. Run time decreased to 12 minutes.

Which task did you set to 'Realtime'? The einsteinbinary_BRP4.. ?
I tried it, but my win7 does not allow that. 'High' is the max I can set. And this increases the gpu usage just from ~50% to <60% average.
Could you please give more information?

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