Re: NFS client latencies
From: Ingo Molnar
Date: Thu Mar 31 2005 - 02:45:58 EST
* Lee Revell <rlrevell@xxxxxxxxxxx> 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
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