Comments on: About http://www.thebigblob.com A blog of blobs Wed, 19 Jun 2013 08:27:34 +0000 hourly 1 http://wordpress.org/?v=3.5.1 By: Erik Smistad http://www.thebigblob.com/about/#comment-3365 Erik Smistad Wed, 20 Mar 2013 09:43:14 +0000 http://thebigblob.com/?page_id=2#comment-3365 First of all, the OpenCL runtime is included in AMDs graphics driver. The SDK is only needed if you want to create your own applications that use OpenCL.

Second, I haven’t used BOINC. However, my best guess is that BOINC is running as another unix user and thus don’t get access to X, the drivers, nor the GPU. I have experienced this myself when trying to run OpenCL with other unix users.

Doing a quick google search it seems that it should be simple to run BOINC as yourself by changing BOINCUSER=boinc to BOINCUSER=yourusername in the configuration file. Or follow this guide http://www.spy-hill.net/myers/help/boinc/unix-personal.html to install and run BOINC as a personal installation.

Another tip which have worked on NVIDIA platforms for me before is to run the command “xhost +” as the other unix user (boinc in your case). This command is used to give users and machines access to X on a given machine.

Hope that helps. Good luck.

]]> By: Anonymous http://www.thebigblob.com/about/#comment-3363 Anonymous Tue, 19 Mar 2013 21:21:40 +0000 http://thebigblob.com/?page_id=2#comment-3363 Hi Erik,
I’m trying to get OpenCL run-time libraries working – so I can GPU-crunch for BOINC projects.
I have tried Debian, Ubuntu, Kubuntu, Lubuntu, UberStudent (Ubuntu with xfce)
and had no luck with the restricted drivers.
BOINC gives the message:
18-Mar-2013 21:47:26 [---] No usable GPUs found
Boinc is looking for a run-time open CL

Oh Yes, I have a ATI/radeon HD 7750.

I went to the AMD website and downloaded the “Catalyst” driver for linux.
This does not work because the openCL, while in “Catalyst” for Winows,
is not in the “Catalyst” for Linux. The Linux “catalyst is the fglrx driver.
I read forums – they said to get the openCL SDK. Did that. Didn’t work –
as a readme in the download said the run-times are not part of the SDk as of version 2.8.

I tried the SDK version 2.7. I get seg faults because you have to carefully match versions of SDK with openGL video driver.
I really appreciate the Debian/Ubuntu package managers now.

For a snity check, I tried the card on a windows bow the the windows “catalyst” driver (with the runtimes). W O R K S G R E A T.

But, I just got a new box with better power and cooling and *really* wanted to run Linux.

Any suggestians – or friends that tun GPUs for BOINC on linux I might ask?
Many thanks,
Jay E.

PS.
MANY thanks to Vincent Danjean who wrote a wonderful article – explaining inter-dependencies at
http://lists.debian.org/debian-devel/2012/06/msg01108.html
Slightly old – but a great, in-depth explanation.

]]> By: aidonian http://www.thebigblob.com/about/#comment-3332 aidonian Thu, 14 Feb 2013 12:54:12 +0000 http://thebigblob.com/?page_id=2#comment-3332 thank you for sharing such knowledge
i am grateful to what you are doing

]]> By: vipul jain http://www.thebigblob.com/about/#comment-1811 vipul jain Mon, 13 Jun 2011 06:54:18 +0000 http://thebigblob.com/?page_id=2#comment-1811 hey i want to ask a question
i want to use graphs into browser as a image…
i am using matplotlib for that ….. but not gettin the results can u help me….

]]> By: Erik Smistad http://www.thebigblob.com/about/#comment-1113 Erik Smistad Sun, 19 Dec 2010 22:48:56 +0000 http://thebigblob.com/?page_id=2#comment-1113 Hi Ines. Don’t you get any kind of error message? Hard to debug with any error message…

]]> By: ines http://www.thebigblob.com/about/#comment-1096 ines Wed, 15 Dec 2010 17:43:55 +0000 http://thebigblob.com/?page_id=2#comment-1096 Hi Erik
Thank you very much for these interesting information.I have tried to implement your code but it doesnt work. When i execute a black windows is shown. my Os is windows Vista and my programming editor is visual studio 2010.Can you help?
Thanks
ines

]]> By: Erik Smistad http://www.thebigblob.com/about/#comment-1071 Erik Smistad Thu, 09 Dec 2010 16:19:22 +0000 http://thebigblob.com/?page_id=2#comment-1071 Hi

Not sure I understand what is wrong. Have you remembered to change the size from 256x256x256 in the line: runMarchingCubes(parseRawFile(“aneurism.raw”, 256, 256, 256), 256, 256, 256, 1, 1, 1, 37.0);.. to 512x512x163

]]> By: Dan http://www.thebigblob.com/about/#comment-1062 Dan Wed, 08 Dec 2010 11:45:31 +0000 http://thebigblob.com/?page_id=2#comment-1062 Hi Erik,
Thanks for sharing all these information. I have tried to use your code that deals with the Marching Cube Algorithm. It works fine with the raw files from the volvis website but if I try to use my own raw file (8 bit size: 512x512x163, spacing: 1,1,1) it shows not a 3D model but 2D slices positioned beside each other. Strange. Can you help?

Thanks and Kind regards,
Dan

]]> By: vikas http://www.thebigblob.com/about/#comment-758 vikas Tue, 10 Aug 2010 20:38:49 +0000 http://thebigblob.com/?page_id=2#comment-758 thanks for sharing your expertise. you are truly gifted with great talent and skills. keep posting..cheers

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