[Neurodebian-users] fsl-5.0-gpu

[Jonathan Berrebi]

Thank you Alex,

The result of cat /etc/proc/cpuinfo | grep 'model name' is
Intel(R) Core(TM) i7-2630QM CPU @ 2.00GHz which includes an Intel® HD Graphics 3000. So I don't need the NVIDIA GPU to have graphics on my laptop. However the nvidia-settings program shows that the nvidia gpu is in used.

It was when looking at the FSL mailing list that I found that the GPU should be free from graphical tasks:
https://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=fsl;59dadbb5.1310


>From now on debian/ubuntu I install nvidia drivers only through apt-get. So you are right I don't need to block nouveau. I guess it is done automatically since two files named /etc/modprobe.d/nvidia-kernel-common.conf and /etc/modprobe.d/blacklist.conf both include a line "blacklist nouveau" and I don't recall having creating these files.

I think I have made some progress by removing anything that had to do with SGE. I removed all the gridengine-* with apt-get and the SGE_ROOT and SGE_CELL environment variables. Sorry for having that mistake before sending the mail.

Then I got a message "Bad substitution" when bedpostx_gpu entered bedpost_postproc_gpu.sh at line 67:

subjdir=${@:${#@}}

I don't know bash programming so much so I har coded subjdir and it still does not work. But at least I can really hear the fan of my GPU for a short while and the screen freezes as well which are good signs I guess. But the jobs stop

/usr/share/fsl/5.0/bin/bedpostx_postproc_gpu.sh: 71: /usr/share/fsl/5.0/bin/bedpostx_postproc_gpu.
sh: [[: not found

So again it is the bash programming at the beggining of the bedpostx_postproc_gpu.sh that seems to be an issue.

I will look at that tomorrow. Thank you for the help,

Best,

Jonathan



________________________________________
De : Neurodebian-users [neurodebian-users-bounces+jonathan.berrebi=ki.se at lists.alioth.debian.org] de la part de Alex Waite [alexqw85 at gmail.com]
Envoyé : lundi 24 février 2014 10:08
À : neurodebian-users at lists.alioth.debian.org
Objet : Re: [Neurodebian-users] fsl-5.0-gpu

Hey Jonathan,

I don't have any experience with fsl-5.0-gpu (one of the other guys on
here will have to chime in to answer that question); however, I do have
a few comments about your nouveau "blocking."

> for FSL) card. For that purpose I installed debian 7 wheezy, the
> neurodebian repository, and the nvidia driver and the cuda toolkit. This
> time I did it all through apt-get instead of installing with the
> NVIDIA*.run files (maybe I shouldn't have?)

Installing through via the package manager is almost always a vastly
superior choice. You did the right thing. :-)

 > which is always a nightmare
> since you have to block "nouveau" and it's never easy.

Are you blocking the nouveau package from being installed via apt-get,
or is this a process specific to CUDA? If you're talking about the
package manager, there's no need to block nouveau.

https://wiki.debian.org/NvidiaGraphicsDrivers#Debian_7_.22Wheezy.22

This link shows how easy it is now. Nouveau /can/ be installed at the
same time as nvidia's proprietary blob, but nvidia's GLX libs will
"win." Then, if you create the /etc/X11/xorg.conf.d/20-nvidia.conf as
they suggest, X11 will use the nvidia driver rather than nouveau. No
need for blocking, pinning, etc.

> I have first a preliminary question that has nothing to do with
> neurodebian but rather with cuda. Why should we block nouveau and
> install the nvidia grafical driver since at the end we want to avoid
> using the nvidia card as a graphical adapter but rather as a computing
> gpu?

Are there directions you're following from somewhere that tell you to do
this?

If, indeed, you cannot use a GPU for both computing and for display,
then your driver, nvidia or nouveau won't matter. They're two different
drivers for the same GPU. Your laptop may simply not have enough GPUs
(e.g. 2+) for the task at hand.

Many modern Intel CPUs come with a GPU on-die. If you have a laptop with
that type of CPU, you /might/ be able to use the Intel GPU for display
and then dedicate the nvidia GPU to computational tasks. Do you know
what your CPU is? cat /proc/cpuinfo | grep 'model name' should tell you.

Sorry I don't know more about the fsl-5.0-gpu package, but hopefully
some of what I provided will help.

---Alex


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