[elrepo] Nvidia Driver Performance: El Repo vs. NVidia's .run file

[Manuel Wolfshant]

On 04/25/2016 05:06 PM, EBradley at williams-int.com wrote:
>
> Hello,
>
> I’ve just recently begun using the Nvidia drivers from el repo 
> installed via yum as opposed to the manually installed .run packages 
> downloaded from Nvidia.com for our engineering workstations running 
> RHEL 6. While I love the fact that the el repo drivers do not need to 
> be reinstalled after every kernel upgrade, one of my users has just 
> shown me a valid case in which the performance of the el repo Nvidia 
> drivers is different from the .run package.
>
> First, some basic info regarding the environment:
>
> User’s System:  Dell Precision T7810
>
> Video Card: Nvidia Quadro K620
>
> OS: RHEL 6.6
>
> Kernel: 2.6.32-573.22.1.el6.x86_64
>
> Driver - el repo (361.42): kmod-nvidia.x86-64 nvidia-x11-drv.x86_64 
> nvidia-detect.x86_64
>
> Driver - Nvidia.com: NVIDIA-Linux-x86_64-361.42.run
>
> Nouveau driver - blacklisted in /etc/modprobe.d/blacklist.conf
>
> I’ll try to be descriptive of the situation without being long-winded:
>
> When viewing the results of an analysis in Ansys Mechanical with the 
> el repo driver, a part is displayed and can be manipulated at will 
> when viewing the general results. If, however, the user selects one of 
> the ‘Total Deformation’ selections within the results tree, the part 
> disappears from the Mechanical window. Conversely, when the el repo 
> drivers are uninstalled and the Nvidia.com driver is installed from 
> the .run package, the Total Deformation part is displayed as expected, 
> showing the regions of varying color gradients depicting the areas of 
> more/less deformation over the surface of the part. I was able to 
> reproduce this behavior on my test machine, a Dell Precision T5500 
> with an Nvidia Quadro K600.
>
> I certainly don’t want to come off like I’m blaming the el repo driver 
> or anything. Rather, I’m interested to know if anyone has experienced 
> anything similar (I’ve checked the previous year of posts and will 
> keep working backward) and also if there’s something I may have missed 
> or misconfigured when installing the drivers via el repo/yum vs. 
> manually installing the .run package. Basically, did I goof or is 
> there a valid difference between the el repo drivers and the .run 
> package from Nvidia.com?
>
> Thanks in advance, and I am happy to provide more detail/logs/answer 
> questions/etc. And my apologies for any legal jargon that is appended 
> to this message, it is automatically-generated and outside of my control.
>
Hello

     The first thing that pops to mind is to run a ls -lR / before 
installing any of the drivers, after installing the elrepo package and ( 
after restoring the system to the pristine status )  after installing 
via .run.  Then do a diff3 using all three file lists and pastebin ( or 
attach ) the diffs

         Manuel
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