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Disabling SMI on AMD Family 17h

Question asked by f.popchenko on May 29, 2019
Latest reply on Jun 6, 2019 by hardcoregames™

Hello,
Is there a way to disable SMI on AMD Epyc?

 

I'm working on AMD Epyc 7301 with QNX (real-time OS) and have SMI interruptions on all CPUs every 32 ms for ~400 us. This is not what we wanted to see in real-time OS.

 

So, if you have any suggestions how can I disable SMIs at all, or just reduse frequency of this SMI's, please, share it with me.

 

Also, in SLES RT, I can see that SMI counter stand at the 0 point. And I have a question, what does Linux do to handle this SMIs? 

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