ProLiant Servers (ML,DL,SL)
cancel
Showing results for 
Search instead for 
Did you mean: 

Disabling System Management Interrupts?

Brian Kidder
Occasional Visitor

Disabling System Management Interrupts?

I'm trying to get a near-realtime system working on a DL380G5 using Red Hat's MRG product. But I'm discovering an unexplained latency that we suspect may be due to SMIs interrupting the kernel and breaking its scheduler. Just doing back-to-back RDTSC instructions occasionally shows latences of several hundred microseconds, when the normal latency is a few dozen nanoseconds.

So, is there a way to verify when SMIs are trigging? How can they be disabled?

I've already disabled iLO2 and USB devices from the BIOS, but that didn't eliminate the latency problem.

-Brian
Server: AkamaiGHost Mime-Version: 1.0 Content-Type: text/html Content-Length: 215 Expires: Sun, 27 May 2018 08:21:37 GMT Date: Sun, 27 May 2018 08:21:37 GMT Connection: close Bad Request

Bad Request

Your browser sent a request that this server could not understand.

Reference #7.5f955b8.1527409297.0