Astropulse CPU vs GPU?

Ever since I started working Opencl WUs, I noticed that I get them in drips & drabs. Out of the 44 AP tasks that are now processing only 4 are tagged for the GPU. How does the scheduler differentiate between which get tagged for CPU work vs GPU work? And, is there a way other than stopping all CPU WUs of having the scheduler send out more GPU work?
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I don't buy computers, I build them!!

The only way to do it is to disable CPU work fetch for a while.
With actual server conditions not that easy.
Otherwise its simple luck.
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The easiest way is too untick 'Use CPU' and untick Run only the selected applications 'SETI@home Enhanced', then Astropulse Wu's can only go to the GPU.

Claggy

Hi, just wondering...

How many AP tasks can a GF 560Ti 1.3Gb or 660GTX 2Gb do at a time? How many CPU cores would that need?

Just want to know if it is worth waiting for Linux version of AP cuda/OpenCL.



p.s.
I'm happy with my i7-3930K CPU doing 6 AP units simultaneously producing 6 completed AP results every 13500 seconds while it is also crunching 6 GPU MB processes on above mentioned cards both doing 3 at a time. The 3930K uses Lunatics linux AVX build. CPU temperature rises to 74-79C, depending on core, when doing 6 AP simultaneously. GPU's stay at 63C.


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Using my GTX460 as a guide - two or three at a time, each taking about one hour. You i7 takes about 4 hours to do one per core active.

Remember, your actual mileage may vary....
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Bob Smith
Member of Seti PIPPS (Pluto is a Planet Protest Society)
Somewhere in the (un)known Universe?

Using my GTX460 as a guide - two or three at a time, each taking about one hour. You i7 takes about 4 hours to do one per core active.

Remember, your actual mileage may vary....

Something like that - I don't look at the points per hour very often.
I don't have any cores reserved on either of my GPU rigs. I did try it once on the one with a 460, and it might have sped up the GPU by a couple of percent, but I lost more by not having the credit from all six CPU cores. The CPU is a 6 core Phenom, and as I don't have any Intel based crunchers I can't comment on any advantages or otherwise by having a core reserved on say an i7.
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Bob Smith
Member of Seti PIPPS (Pluto is a Planet Protest Society)
Somewhere in the (un)known Universe?

Rob you are very slow compared to other 460´s.
Do you check you results.
13000 seconds instead of 3500.
You would benefit a lot reserving a core.

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Thank You Rob.

Rob you are very slow compared to other 460´s.
Do you check you results.
13000 seconds instead of 3500.
You would benefit a lot reserving a core.

Check out my i7/950 -- it is running 1 x GTX660SC/2Gb & 1 x GTX460SE/1Gb. Both are running Lunatics _x41zc cuda 5.0 @ 3 each & Opencl _r1761 @ 1 each. CPU MB tasks run an avg of 11 hrs, GPU MB avg 20-25 min, & AP Opencl avg 45 min. Normally I run at 80% of processors ( 6 cores). Opencl will explicitly reserve 1 core for each task running, and it will release it when the task is finished. Not the fastest in the Seti universe, but I am happy with the results so far. The machine is a Win7/64-bit running BOINC 7.0.48 and nVidia 313.96.
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I don't buy computers, I build them!!

Rob you are very slow compared to other 460´s.
Do you check you results.
13000 seconds instead of 3500.
You would benefit a lot reserving a core.

Hi Mike,

The 13500 is from my CPU (6 units at that time). Rob is doing about 3 tasks in an hour (3600s).

Do you know how many seconds CPU time it takes for a task that finishes in an hour?

Rob you are very slow compared to other 460´s.
Do you check you results.
13000 seconds instead of 3500.
You would benefit a lot reserving a core.

Hi Mike,

The 13500 is from my CPU (6 units at that time). Rob is doing about 3 tasks in an hour (3600s).

Do you know how many seconds CPU time it takes for a task that finishes in an hour?

Check out my i7/950 -- it is running 1 x GTX660SC/2Gb & 1 x GTX460SE/1Gb. Both are running Lunatics _x41zc cuda 5.0 @ 3 each & Opencl _r1761 @ 1 each. CPU MB tasks run an avg of 11 hrs, GPU MB avg 20-25 min, & AP Opencl avg 45 min. Normally I run at 80% of processors ( 6 cores). Opencl will explicitly reserve 1 core for each task running, and it will release it when the task is finished. Not the fastest in the Seti universe, but I am happy with the results so far. The machine is a Win7/64-bit running BOINC 7.0.48 and nVidia 313.96.

I did try running with one core feeding the GPU about 6 months ago (with the current hardware and software set up) and the overall throughput (total tasks per hour)was less with one core set aside for feeding the GPU than having the default settings where there is a "free for all". I have no doubt that for other CPU+GPU configurations the results would be different.

(I have run GPU-X on a few occasions, and the load time (time when the GPU is essential idle, is only a few seconds - between 5 and 10, not a lot when the run time is way over a thousand).
____________
Bob Smith
Member of Seti PIPPS (Pluto is a Planet Protest Society)
Somewhere in the (un)known Universe?

Rob you are very slow compared to other 460´s.
Do you check you results.
13000 seconds instead of 3500.
You would benefit a lot reserving a core.

Hi Mike,

The 13500 is from my CPU (6 units at that time). Rob is doing about 3 tasks in an hour (3600s).

Do you know how many seconds CPU time it takes for a task that finishes in an hour?

No i checked Robs host.
Just today 3 WUs longer than 13000 seconds.
Thats because driver hangs because of lack of CPU cycles.
Wouldn`t happen with a free CPU core.
He is wasting GPU cycles.

I did try running with one core feeding the GPU about 6 months ago (with the current hardware and software set up) and the overall throughput (total tasks per hour)was less with one core set aside for feeding the GPU than having the default settings where there is a "free for all". I have no doubt that for other CPU+GPU configurations the results would be different.

(I have run GPU-X on a few occasions, and the load time (time when the GPU is essential idle, is only a few seconds - between 5 and 10, not a lot when the run time is way over a thousand).

Check out my i7/950 -- it is running 1 x GTX660SC/2Gb & 1 x GTX460SE/1Gb. Both are running Lunatics _x41zc cuda 5.0 @ 3 each & Opencl _r1761 @ 1 each. CPU MB tasks run an avg of 11 hrs, GPU MB avg 20-25 min, & AP Opencl avg 45 min. Normally I run at 80% of processors ( 6 cores). Opencl will explicitly reserve 1 core for each task running, and it will release it when the task is finished. Not the fastest in the Seti universe, but I am happy with the results so far. The machine is a Win7/64-bit running BOINC 7.0.48 and nVidia 313.96.

Thank You Cliff,

I'll take a look at your computer(s) (the i7/950) on sunday.

Did I understand correctly: You are doing 3 GPU MB (cuda) and one GPU AP (opencl) at a time on both cards and an additional 4-6 CPU tasks. (4 when runnig AP opencl on both cards)

Now it is time for me to go to sleep. It is 1.00 AM in Finland.

Happy Crunching!