Messages in this thread | | | Subject | Re: preempt-rt, NUMA and strange latency traces | From | Sébastien Dugué <> | Date | Thu, 09 Feb 2006 12:11:31 +0100 |
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On Wed, 2006-02-08 at 08:49 -0800, john stultz wrote: > On Wed, 2006-02-08 at 11:45 +0100, Sébastien Dugué wrote: > > The more I think about it, the more I tend to believe it's hardware > > related. It seems as if the CPU just hangs for ~27 ms before > > resuming processing. > > That sounds like to the ~30ms RSA caused SMIs. Does this system have an > RSA1 or RSA2 card? >
Hi John,
I think it's an RSA1 card, but no certainty here. I don't think the x440 came with the RSA2. Is there a way to check for sure without unplugging everything (It's such a mess of cables behind the box)?
Whats the SMI issue with the RSA? Could the RSA generate bursts of SMI that could be enough to freeze the CPUs?
When I ran those tests I was logged on the RSA (serial line). I will try to run the tests again without being connected when I can manage to get some CPU time (eh! shared machine)...
Thanks.
Sébastien.
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