Re: [LKP] [lkp] [sctp] a6c2f79287: netperf.Throughput_Mbps -37.2% regression

[Aaron Lu]

On Fri, Aug 19, 2016 at 04:19:39AM -0300, Marcelo Ricardo Leitner wrote:
> Hi,
> 
> Em 19-08-2016 02:29, Aaron Lu escreveu:
> ...
> > It doesn't look insane and sctp_wait_for_sndbuf may actually have
> > something to do with a larger sctp_chunk I suppose?
> > 
> > The same perf record doesn't capture any sample for the good commit,
> > which suggests the nerperf process doesn't sleep in sctp_wait_for_sndbuf.
> 
> Ahhh yes! It does, and then it would mean your txbuf is too small for the
> chunk sizes you're using (sctp tests option -m).
> 
> What's your netperf cmdline again please?

netperf -4 -t SCTP_STREAM_MANY -c -C -l 300 -- -m 10K -H 127.0.0.1

Is the 10K used here a problem? If so, can you suggest a proper value
for our netperf performance test? Thanks.

Regards,
Aaron