On Wed, 2006-11-08 at 22:10 -0700, Eric W. Biederman wrote:
>
> Cool. I'm glad to know it was simply a buggy lmbench.
>
> What is sysconf(_SN_NPROCESSORS_ONLN) doing that it slows down as the
> number of irqs increase? It is a slow path certainly but possibly
> something we should fix. My hunch is cat /proc/cpuinfo...
>
The increase in time of sysconf(_SN_NPROCESSORS_ONLN) call
is within "show_stat" function after looking at profiling data.
There are a couple of loops that iterate over kstat_irqs
interrupt statistics and depend on NR_IRQS. Doesn't
look like something we need to fix.
Tim
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