Re: Fwd: upgrade to jessie from wheezy with cuda problems

Em 18-11-2013 13:13, Francesco Pietra escreveu:
>
> It is getting hard, unless I mistaken what was suggested by nvidia .
> Thus, following what was suggested by nvidia as a no-barrier solution,
> https://devtalk.nvidia.com/default/topic/545186/enabling-pcie-3-0-with-nvreg_enablepciegen3-on-titan/?offset=10#4021328
>
> I updated the kernel boot string by
>
> 1) typing 'e' at grub prompt,
> 2) adding the option to the linux line,
> 3) Ctrl-x to boot
>
> If that procedure is correct (probably it is, as
>
> francesco@gig64:~$ cat /proc/cmdline
> BOOT_IMAGE=/boot/vmlinuz-3.10-3-amd64 root=/dev/mapper/vg1-root ro 1.
> nvidia.NVreg_EnablePCIeGen3=1 quiet
> francesco@gig64:~$ )
>
> then, no luck. Both LnkCap and LnkSta were at at 5GT/s, as for PCIe 2.0.
> Molecular dynamics, accordingly, was not accelerated.
>
> I wonder whether "1." preceding "nvidia..." is what is needed for a grub
> bootloader option. I did not find any other instance about that nvidia
> suggestion on internet.


I may be wrong, but it seems that there is a hardware bump in your 
pci-express 3.0 road , Francesco :

http://www.anandtech.com/show/7521/nvidia-launches-tesla-k40

Close to the end it says that nvidia "... is finally enabling full 
pci-express 3.0 speeds ..." , so it may be that your card suffers from 
this issue too .

Hope it helps.