Messages in this thread | | | Subject | Re: preempt-rt, NUMA and strange latency traces | From | Lee Revell <> | Date | Fri, 10 Feb 2006 14:07:54 -0500 |
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On Fri, 2006-02-10 at 14:07 +0100, Sébastien Dugué wrote: > That's the problem and I'll have to synchronize for a proper window > for running my tests. > > Is this SMI thing IBM's eyes only stuff or is it documented > somewhere? >
No, I wish it was just IBM. Lots of modern systems unfortunately use SMM (system management mode, which is entered when we get a system management interrupts) to implement all kinds of PM and BIOS junk and various value added features.
Most of these systems are laptops and are utterly unusable for low latency work. Worse, most of this stuff is considered highly proprietary by the vendors (probably because it leands to such suckage).
Lee
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