On 12.07.2010, at 17:40, Jeremy Chadwick wrote: > cx_supported indicates your CPU only supports C1 and not lower > power-saving states (C2/C3/C4, etc.). Non-C1 states can sometimes do > "interesting" things when it comes to interrupt handling. I believe > your system may support the C1E state (given what machdep.idle_available > shows), but that's often controlled by the system BIOS (on both Intel > and AMD processors, but I'm trying to focus on AMD here). C1E, as far > as I know, is the same as C1 state except can save a little bit more > power. > > I believe neither C1 nor C1E do anything with interrupts, instead just > halting the core when idle/not in use. HLT mode, at least on multi-core > AMD CPUs, equates to C1E.
I see. > Shot in the dark: you're not running powerd(8) on this system are you? No, I'm not. But once in our long series of trial&error, I tried to enabled it, just to see wether it would trigger something. It didn't, but the system was not loaded at that time. But I just remebered that I once tried to reproduce the problem with kern.smp.disabled=1 in loader.conf, but with the test load running only on the BSP, the problem did not seem to occur. Don't know if this is any of any help though. Markus_______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
