ECM for CUDA GPUs in latest GMP-ECM ?

[Dubslow]

Originally Posted by wombatman

Edit: It helps if I actually send my response to the listserv instead of just Cyril. Sorry about that.

Every time I try and drive by a mailing list, I do the exact same thing. It's happened at least 3 times and I never seem to learn from it (possibly because I only do it ~once a year).

[cgy606]

Originally Posted by wombatman

Honestly, I have no idea about 7 to 10 compatibility, but I don't think it should. I compile with VS2012 since I got a free copy of the full edition somewhere along the line.

Can you give me an idea on how to install gpu-ecm on a windows machine. I downloaded all the files, but the readme, readme.gpu install, and install ecm show up in a messed up format in notepad. I have downloaded visual studio 2015, so I believe I have the tool to compile gmp-ecm and build it, but not sure how to proceed.

[VBCurtis]

Try wordpad; notepad sometimes pukes on linux-formatted-cr files.
(sorry, I have no compilation advice)

[henryzz]

Originally Posted by VBCurtis

Try wordpad; notepad sometimes pukes on linux-formatted-cr files.
(sorry, I have no compilation advice)

Better still for this sort of thing Notepad++

[xilman]

Originally Posted by henryzz

Better still for this sort of thing Notepad++

Even better, IMAO, is Emacs.

Let the religious wars commence.

[cgy606]

Originally Posted by VBCurtis

Try wordpad; notepad sometimes pukes on linux-formatted-cr files.
(sorry, I have no compilation advice)

Wordpad works fine, thanks.

Unfortunately, I have absolutely no idea how to build anything in visual studio. I am trying to build gpu-ecm, so I am following the instructions. You first have to build gmp-ecm. In order to build that on Windows, you need yasm. I got that and put it into vs2012, but I don't know how to change the environmental PATH YASMPATH; so I don't know if that is working. Next, I need to get mpir built. I am reading that readme, and it say to go to mpir.sln in the build_vc2012 folder and run the script and build, but I am getting all kinds of error (again don 't know if I am even building it correctly). I have no idea how to build using vs cause I have never done it. I know some of you have build gpu-ecm on windows machine. Any tips would be appreciated...

[wombatman]

I truthfully don't remember all the steps I went through to get everything compiled successfully with VS2012 (I have no experience with VS2015). I'm attaching the gpu_ecm exe I have built. Try it out and see what dlls you need for it.

[cgy606]

I extracted the ecm_gpu.exe file and running with:

echo "144!+5" | ecm_gpu.exe -gpu -savea gpu.save -c 256 50000 0 >> gpu.out

And I got an error of "missing cudart64_70.dll". So I went to GeForce driver page and downloaded the latest nvidia package launcher and installed it. It installed however, when I went to rerun ecm_gpu.exe, I got the same error. What nvidia drivers did you install?

[wombatman]

You would need to install CUDA 7.0. Alternatively, you should be able to use the dll attached.

I'm also attaching mpir.dll, which I think you'll need too.

[cgy606]

Originally Posted by wombatman

You would need to install CUDA 7.0. Alternatively, you should be able to use the dll attached.

I'm also attaching mpir.dll, which I think you'll need too.

Thanks, I think it is working now. Is there a way to multi-thread stage 2 when running the resume command?

[wombatman]

You'll want to find ecm.py, written by WraithX on these forums. He recently added the ability to resume a file in a multithread fashion using that script.