SMP interrupt problem

[John Baldwin]

On Sunday 30 March 2008 06:43:13 am Rob wrote:
> Hi, got a problem with high interrupt load on a couple of dual CPU servers. 
First 
> loaded 6.3 onto each of them and both displayed a constant load showing 
under 
> interrupt when looking at top. I then loaded 7.0 onto one of them and found 
> exactly the same problem. One of them has since had Fedora installed and 
works 
> fine with that. Below is the top -CS output and dmesg from the machine with 
7.0 
> installed, if anyone wishes to see the same info from the 6.3 install I have 
that 
> as well if needed.

Looks like IRQ 9 is firing a lot (vmstat -i output would be useful).  You 
might try disably certain parts of ACPI (such as thermal, etc.) to see if you 
can narrow down the source of the interrupts.

-- 
John Baldwin