Philippe Gerum wrote: > Mm, this really looks like some firmware/BIOS cyclic activity, that > would hit the busy loop more or less frequently, depending on the > internal timing of the outer loop. This reminds me that some recent > Intel chipset are known to prevent global SMI disabling actually, maybe > this is the case here, so our work-around would be basically useless. > Another usual suspect is NMI handling (which the Adeos layer does not > pipeline but rather delivers immediately), but I guess that you did not > activate the NMI watchdog anyway, so back to square #1, I guess.
No, I never enabled the NMI watchdog. Yeah, that doesn't sound good for me. I just tried, for the first time, allowing SMI to remain enabled. Behaves exactly the same :( A failure to disable SMI would also explain why none of my peripherals were ever affected. I thought SMI was supposed to increase latencies, but I only see latencies < 60us at any load, unless I start video capture. Does the latency test absolutely rule out SMI as the cause? Is there any way to check whether SMI is actually disabled? Thanks, Saul. _______________________________________________ Xenomai-help mailing list [email protected] https://mail.gna.org/listinfo/xenomai-help
