Re: NFS client latencies
From: Ingo Molnar (mingo_at_elte.hu)
Date: 03/31/05
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Date: Thu, 31 Mar 2005 09:48:33 +0200 To: Lee Revell <rlrevell@joe-job.com>
* Ingo Molnar <mingo@elte.hu> wrote:
> 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?)
ok, find a new latency trace attached (1.6 msecs). I generated write
loads, and the nfs_scan_list_dirty() latency is gone and indeed
nfs_scan_list() generates the worst latency - while processing 8535
pages in one critical section.
Ingo
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