Fedora 14 2.6.35.14-106.fc14.x86_64 High Load

[Tom Clark]

Hi,

 

I've noticed that our server has a high CPU load. Our server is a mail
server setup with Fedora 14 it has a dual-core AMD Opteron, 8GB of RAM and
twin 1TB SATA drives in software Raid 1.

 

We originally had a CPU load greater than 20, which we believed to be caused
by this bug https://bugzilla.redhat.com/show_bug.cgi?id=650934

 

We upgraded the kernel to the latest version
(kernel-2.6.35.14-106.fc14.x86_64) using 'yum'.

 

Although the CPU load has now dropped to below 3, it still averages at about
2.6. According to a 'top' there are no processes using a high percentage of
CPU and the CPU is mostly on idle.

 

After reading the bug report I've installed 'powertop'. This is showing the
following:

 

Top causes for wakeups:

  64.5% (2418.3)   [kernel scheduler] Load balancing tick

  23.8% (890.8)   [extra timer interrupt]

 

Any ideas what is causing this and how to fix the issue? 

 

Please let me know if you need any extra information!!

 

Thanks,

 

Tom