How is average calculated?

[Paul Howarth]

On 17/06/09 08:01, Jitesh Shah wrote:
> Hi,
> I was wondering how the average load on a builder is calculated?
> I have a builder which is simply refuses to take tasks (not even one)
>
> [jitesh at fedora-arm ~]$ koji list-tasks | grep armbuilder39
> <NIL OUTPUT>
> (and there are about 9 tasks still queued. The other builders are busy,
> so they are in the FREE state)
>
> which means the builder isn't processing any task, right?
>
> now, here is kojid tail of that builder..
> 2009-06-17 08:54:07,628 [INFO] koji.build.TaskManager: Not ready for task
> 2009-06-17 08:54:28,466 [INFO] koji.build.TaskManager: Load average 6.09>  4.00
> 2009-06-17 08:54:30,365 [INFO] koji.build.TaskManager: Not ready for task
> 2009-06-17 08:54:50,136 [INFO] koji.build.TaskManager: Load average 6.00>  4.00
> 2009-06-17 08:54:51,268 [INFO] koji.build.TaskManager: Not ready for task
> 2009-06-17 08:55:11,708 [INFO] koji.build.TaskManager: Load average 5.75>  4.00
> 2009-06-17 08:55:13,622 [INFO] koji.build.TaskManager: Not ready for task
> 2009-06-17 08:55:34,318 [INFO] koji.build.TaskManager: Load average 5.85>  4.00
> 2009-06-17 08:55:36,339 [INFO] koji.build.TaskManager: Not ready for task
> 2009-06-17 08:55:56,769 [INFO] koji.build.TaskManager: Load average 5.68>  4.00
> 2009-06-17 08:55:58,507 [INFO] koji.build.TaskManager: Not ready for task
>
> How does it end up calculating 5.5+ load average when it is not even
> executing a single task?

Load average is a function of the system as a whole, not just koji.

http://en.wikipedia.org/wiki/Load_(computing)

The builder must be busy doing something else.

Paul.