Forum Discussion

MEghb's avatar
MEghb
Icon for New Contributor rankNew Contributor
5 years ago

The system only recognizes the FPGA for a couple of minutes!!!!

I installed the new Intel PAC on my workstation recently and I installed the software stack and opencl on my system to use the board. However, the systems only recognizes the board for a couple of minutes and I can run sample examples on they work fine. However, after around 5 minutes of fpga inactivity the system cannot recognize the baord anymore through "aocl diagnose". And the only solution I found so far it to power off the machine and start it again, which is not a feasible solution for me anymore.

Here are the result of "aocl diagnose" just couple of minutes apart.

before.png file is the screenshot right after start up and after.png is 5 minutes after that without making any changes.

Also, I am using Ubuntu 18.04 on my workstation.

I appreciate it if anybody could help me with that.

Thanks,

Mostafa

4 Replies

  • AnilErinch_A_Intel's avatar
    AnilErinch_A_Intel
    Icon for Frequent Contributor rankFrequent Contributor
    5 years ago

    Hi,

    Please let us know the details

    1. Is the fpgainfo fme available
    2. Can you check whether the temperature is rising during this 5 minutes of inactivity . Like running the aocl diagnose in brief intervals and letting know the results to us.
    3. Can you increase the fan speed and check whether this is affecting the performance.

    Regards

    Anil

  • MEghb's avatar
    MEghb
    Icon for New Contributor rankNew Contributor
    5 years ago

    Hi,

    Thanks for your response. You were right. I checked the temp as you suggested and it seems like the system is not cooling the FPGA well. I increased my fan speed in order the cool the FPGA, and it is working well after that. I checked the temperature regularly and it was not increasing like before. Do you think it could be harmful to the system since I need to keep the fans running at a higher speed than normal use?

    Regards,

    Mostafa

  • AnilErinch_A_Intel's avatar
    AnilErinch_A_Intel
    Icon for Frequent Contributor rankFrequent Contributor
    5 years ago

    Hi

    While it is not uncommon to increase the fan speed, we would advise to check with the workstation vendor to know the pros ,cons and limits of workstation fan speed increase.

    Regards

    Anil

  • MEghb's avatar
    MEghb
    Icon for New Contributor rankNew Contributor
    5 years ago

    Thanks, you are right. I should check that.

    Mostafa,