Re: NFS client latencies

Ingo Molnar
2005-03-31T07:43:06Z

* Lee Revell <rlrevell@joe-job.com> wrote:

> > Yes. Together with the radix tree-based sorting of dirty requests,
> > that's pretty much what I've spent most of today doing. Lee, could you
> > see how the attached combined patch changes your latency numbers?
>
> Different code path, and the latency is worse. See the attached ~7ms
> trace.

could you check the -41-23 -RT kernel at the usual place:

http://redhat.com/~mingo/realtime-preempt/

i've added Trond's radix lookup code, plus the lockbreaker patch.

(one thing that is not covered yet is nfs_scan_list() - that still scans
a list. Trond, is that fixable too?)

Ingo