Dual CPU detection problem

[Doug White]

On Tue, 30 Nov 2004, Joseph Koshy wrote:

> Strange problem.
>
> On an IBM xSeries 335 machine with TWO P4 HTT cpus (mptable, dmesg output
> enclosed) FreeBSD -CURRENT will sometimes detect both the physical CPUs
> and will sometimes detect only one.
>
> FreeBSD 5.3 reliably detects the 2 physical / 4 logical CPUs that are present.
>
> Any suggestions on how to debug this?

dmesg + mptable + acpidump output in both situations would be a good
start.

Sounds like one of the physical CPUs might be flakey; you see 2 CPUs since
you see the solitary core's hyperthreaded pair.

-- 
Doug White                    |  FreeBSD: The Power to Serve
dwhite at gumbysoft.com          |  www.FreeBSD.org