On Wed, Jun 26, 2002 at 12:52:41PM +0200, Andries Brouwer wrote:
> On Wed, Jun 26, 2002 at 12:32:43PM +0200, Nicolas Bougues wrote:
>
> > Does anybody have any idea on what I may have done wrong, and why
> > would loadavg increase when vmstat show no activity ?
>
> loadavg does not report what you think it reports
>
As far as I understand, loadavg reports the average number of
processes in the TASK_RUNNING state.
What happens in my driver, I believe, is that :
- on timer interrupt, I do some stuff, and wake_up the waiting process
- then the loadavg is computed (seeing my waiting task as TASK_RUNNING)
- then the scheduler runs the task
- then the task goes immediatly back to sleep
>From this point of view, then my problem is just "cosmetic". Isn't
there a way to do things in a different order, so that I could still
get a meaningful(*) loadavg ?
(*): by meaningful, I mean representing the number of busy processes
at a random point in time.
-- Nicolas Bougues- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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