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kern/45928: Random freeze and interrupt/system storms (netbsd-5/amd64 and -current/amd64)
>Synopsis: Random freeze and interrupt/system storms (netbsd-5/amd64 and
>Arrival-Date: Sun Feb 05 07:20:00 +0000 2012
>Originator: Matthew Mondor
>Release: netbsd-5, -current
NetBSD ninja.xisop 5.1_STABLE NetBSD 5.1_STABLE (GENERIC_MM) #1: Fri Feb 3
06:04:22 EST 2012 email@example.com:/usr/obj/sys/arch/amd64/compile/GENERIC_MM
Since I installed NetBSD on an i5 2500 system I have I experience
instability issues, involving resumable freezes and interrupt/system
time storms reported on the cores.
Suddenly, the system becomes unresponsive and top shows two of the 4
cores in 100% interrupt usage and the two others in 100% system usage.
The system becomes reusable again but then it shortly does this again
and it gets worse, where I have to reset.
This sometimes happens after several hours or can also occur a minute
or two after I rebooted. The system does not have to be notoriously
busy for this to happen, it seems to occur anytime.
Unfortunatly I'm not sure how to diagnose this further. I think that
it happens less often, or that it's less serious since I applied the
patch from kern/45160, but it still happens. Also, it seems to happen
more quickly if I use a hard drive in PIO mode (see kern/45917), but
even when I'm not using those this happens (in which case I see no
abnormal storms reported by vmstat/systat, so I suspect it's soft
This also happens on -current it seems.
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