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Firing on all CPUs

I've got a dual-CPU system that I'm starting to think only runs off one
processor.  The kernel has SMP support built in and /proc/cpuinfo shows
two processors, but top only shows a single set of CPU utilization (although
it could just be that the stock debian top isn't SMP aware, I suppose) and
the system slows down terribly when the load average approaches 1.0 rather
than at 2.0 (although I think this box probably sees high load because it's
disk-bound rather than CPU-bound).

Is there anything else I need to do to activate SMP?  And how do I get top
to display stats for each CPU instead of either ignoring the second or
presenting aggregate stats?

That's not gibberish...  It's Linux. - Byers, The Lone Gunmen
Geek Code 3.1:  GCS d? s+: a- C++ UL++$ P++>+++ L+++>++++ E- W--(++) N+ o+
!K w---$ O M- V? PS+ PE Y+ PGP t 5++ X+ R++ tv b+ DI++++ D G e* h+ r y+

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