Re: high load, no bottleneck

[manu%netbsd.org@localhost (Emmanuel Dreyfus)]

Greg Oster <oster%cs.usask.ca@localhost> wrote:

> > sysctl to the rescue.
> 
> The appropriate 'bit to twiddle' is likely raidPtr->openings.
> Increasing the value can be done while holding raidPtr->mutex.
> Decreasing the value can also be done while holding raidPtr->mutex, but
> will need some care if attempting to decrease it by more than the
> number of outstanding IOs.

This suggests that in my problem, RAIDframe would be the bottleneck
given too many concurent I/O sent by WAPBL. But how is it possible?
Aren't WAPBL flushes serialized?

The change you sugest would be set by raidctl rather than sysctl, right?

-- 
Emmanuel Dreyfus
http://hcpnet.free.fr/pubz
manu%netbsd.org@localhost