Messages in this thread | | | From | Jeff Layton <> | Date | Thu, 4 Dec 2014 12:28:45 -0500 | Subject | Re: [RFC PATCH 00/14] nfsd/sunrpc: add support for a workqueue-based nfsd |
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On Thu, 04 Dec 2014 09:17:17 -0800 Shirley Ma <shirley.ma@oracle.com> wrote:
> I am looking at how to reduce total RPC execution time in NFS/RDMA. mountstats output shows that RPC backlog wait is too long, but increasing the credit limit doesn't seem help. Would this patchset help reducing total RPC execution time? > > Shirley >
I'm not sure. It depends on why you're seeing a backlog.
So far, my testing still shows this to be slightly (~2%) slower than the same setup running a threaded nfsd, but that could be different with a NUMA server or faster disks.
Probably there is some more tuning to do here before this is quite ready for prime-time. It may be worth testing in your environment though if you have the time and ability to do so.
> On 12/04/2014 03:47 AM, Jeff Layton wrote: > > I was using ftrace with the sunrpc:* and workqueue:* tracepoints, and > > had a simple perl script to postprocess the trace info to figure out > > average/min/max latency.
-- Jeff Layton <jlayton@primarydata.com>
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