LL with OpenCL

[TeknoHog]

Originally Posted by nlurski

Would we be able to add the ability for it to auto-get work to do?

My old(ish) Python script still works: https://github.com/teknohog/primetools

I hadn't used it in a while, so I did some updates for clLucas 1.04, and tested that it works with a double check from mersenne.org.

[LaurV]

Hey Mike, just playing with an OpenCL card and trying to dld clLucas 1.04 from the mirror, it is not there... This sent me digging through the thread... Maybe you can add it?

(I am talking about www.mersenneforum.org/cllucas mirror)

[Xyzzy]

Originally Posted by LaurV

Hey Mike, just playing with an OpenCL card and trying to dld clLucas 1.04 from the mirror, it is not there... This sent me digging through the thread... Maybe you can add it?

(I am talking about www.mersenneforum.org/cllucas mirror)

The owner of that directory is kracker.

We can add files but we would prefer to let him do it.

Or if he is willing to let someone else upload files he can share the login info.

It would be nice to have things up-to-date.

[LaurV]

He seems not active for a while. I am sure he will not be upset if you add a folder with the same name style as existent. The last clLucas is in this thread few pages back. I will PM him anyhow, maybe he is not reading this. He is a good guy, but anyhow, if he gets upset, then I will give him back the LL/DC credit he gave me by mistake few years ago, hehe... (for the people who don't know the story, we used to exchange credits in the past, I had at the time lots of GPU power, but no CPU power, and I was producing TF credits and reporting for him (and other people), and he was doing LL/DC and report it for me; then when we decided to stop this "trade", he forgot to switch one of his computers (change the user name back), which still continued to produce for me; of course, I intentionally didn't notify him for a while, hehe, bad LaurV! , but he didn't get upset; anyhow, it was fun...)

[LaurV]

Done, v1.04 added to the mirror, as well as the 1.044 sources from msft. Thanks.

[kriesel]

Originally Posted by msft

Hi,
Took out FFT kernel version.
This version only demonstration(for programmer).
Same speed,But fun.

Could someone with write access to http://www.mersenneforum.org/cllucas/ please include the most current clLucas.ini (see post #396, page 36) in the Windows 1.04 zip file? The ini file version in the Windows x64 zip file does not now include anything about SixStepFFT, and so it produces the following warning:
Warning: Couldn't parse ini file option SixStepFFT; using default: off

(Except for 1.044's bz2 including the SixStepFFT material in its clLucas.ini and so presumably not generating a warning, I don't know whether any other packages have that warning issue also.)

[kriesel]

Hi,

Many cards support OpenCL, of various version levels. What OpenCL version level support is required for clLucas to operate fully? Are non-AMD gpus supported? Are there additional drivers, dlls or extensions that must be loaded? I tried running v1.04 clLucas_x64 -info on a system which CPU-Z indicates has an Intel based GPU, supporting OpenCL, and got

Platform 0 : Intel(R) Corporation
Platform 1 : Intel(R) Corporation
Warning: Couldn't parse ini file option SixStepFFT; using default: off
Error: NULL platform found so Exiting Application.

The hardware I ran this on is OpenCL C 2.0 capable.

[kriesel]

Originally Posted by kriesel

Hi,

Many cards support OpenCL, of various version levels. What OpenCL version level support is required for clLucas to operate fully? Are non-AMD gpus supported? Are there additional drivers, dlls or extensions that must be loaded? I tried running v1.04 clLucas_x64 -info on a system which CPU-Z indicates has an Intel based GPU, supporting OpenCL, and got

Platform 0 : Intel(R) Corporation
Platform 1 : Intel(R) Corporation
Warning: Couldn't parse ini file option SixStepFFT; using default: off
Error: NULL platform found so Exiting Application.

The hardware I ran this on is OpenCL C 2.0 capable.

Make that OpenCL 2.1. That's what Mfakto reports at startup.

[kriesel]

Originally Posted by Madpoo

The primenet API is documented here Primenet API so it really just takes someone with time to try and implement that.

The source for Prime95 could probably be looked at to clear up anything along the way.

http://v5.mersenne.org/v5design/v5webAPI_0.97.html#uc looks to me rather cpu-oriented, well suited to cpus and not as well matched to expressing gpu characteristics or terminology. Some extension may be useful for gpus. A gpu's six types of memory is in addition to the host system's cpu registers, cache levels, and main memory. Number of physical cores in a gpu is generally hundreds or thousands. A system may contain multiple, dissimilar gpus. In manual reporting, I handle gpus with a unique identifier appended to the system name. http://www.eng.utah.edu/~cs5610/lect...ure%20CUDA.pdf
https://www.anandtech.com/show/10325/the-nvidia-geforce-gtx-1080-and-1070-founders-edition-review/4

[kriesel]

The attached contains some observations made while getting familiar with cllucas 1.04 for Windows. As always, it is shared in appreciation of the efforts of the code author and those who helped in the early development and testing. Where applicable I've included pointers to thread posts. Please PM me with any additions or corrections. This particular list is based on less usage than others I've made for other software (partly because I only recently acquired AMD gpus).

[kriesel]

I was offered "a blog area to consolidate all of your pdfs and guides and stuff" and accepted.
Feel free to have a look and suggest content. (G-rated only;)
General interest gpu related reference material http://www.mersenneforum.org/showthread.php?t=23371
clLucas Lucas-Lehmer primality testing with OpenCl on gpus http://www.mersenneforum.org/showthread.php?t=23401

Future updates to material previously posted in this thread will probably occur on the blog threads and not here. Having in-place update without a time limit makes it more manageable there.