Messages in this thread | | | Date | Wed, 3 Oct 2012 10:47:32 +0100 | From | Mel Gorman <> | Subject | Re: Netperf UDP_STREAM regression due to not sending IPIs in ttwu_queue() |
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On Tue, Oct 02, 2012 at 03:48:57PM -0700, Rick Jones wrote: > On 10/02/2012 01:45 AM, Mel Gorman wrote: > > >SIZE=64 > >taskset -c 0 netserver > >taskset -c 1 netperf -t UDP_STREAM -i 50,6 -I 99,1 -l 20 -H 127.0.0.1 -- -P 15895 -s 32768 -S 32768 -m $SIZE -M $SIZE > > Just FYI, unless you are running a hacked version of netperf, the > "50" in "-i 50,6" will be silently truncated to 30. >
I'm not using a hacked version of netperf. The 50,6 has been there a long time so I'm not sure where I took it from any more. It might have been an older version or me being over-zealous at the time.
> PS - I trust it is the receive-side throughput being reported/used > with UDP_STREAM :)
Good question. Now that I examine the scripts, it is in fact the sending side that is being reported which is flawed. Granted I'm not expecting any UDP loss on loopback and looking through a range of results, the difference is marginal. It's still wrong to report just the sending side for UDP_STREAM and I'll correct the scripts for it in the future.
Thanks!
-- Mel Gorman SUSE Labs
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