Tesla K20m - Clock Throttling - HW Slowdown

Graphics / Linux Linux
1

Hi,

I am working with a Tesla K20m card. The clock throttling on this card seems to be always on.

The relevant nvidia-smi output is

Clocks Throttle Reasons

Idle                        : Active
Applications Clocks Setting : Not Active
SW Power Cap                : Not Active
HW Slowdown                 : Active
Sync Boost                  : Not Active
Unknown                     : Not Active

I have tried the simple steps like GPU Reset, Reboot the system and they have not helped. Google hasn’t been of a lot of help with this problem.

I have seen the 4 reasons that could lead to “HW Slowdown” from http://developer.download.nvidia.com/compute/cuda/6_0/rel/gdk/nvidia-smi.331.38.pdf.

  1. The temperature is under 50
  2. PState is constant when I check the status
  3. Power draw can't be too high as the measured power is around 17W (P8 power state)
  4. Since the other reason is related to power supply, I have tested the card with two different power supplies. However the problem remains even when I use alternate power supplies

The system has Ubuntu 16.04 OS and I have CUDA 8.0 and driver version 375.66 installed. Earlier I had driver version 375.57 installed and the problem exists in both driver versions.

Any suggestions will be very helpful.

2

Hi, I’ve encountered the same problem with P4 Ubuntu 16.04 CUDA 9.0 and driver version 384.145. Did you solve the problem? Any insight?

3

Please enable the nvidia-persistenced to start on boot, make sure it is continuously running and check if that resolves the issue.