On Tue, Jul 24, 2018 at 06:35:35PM +0300, Konstantin Khorenko wrote: > Hi Marcelo, > > pity to abandon Oleg's attempt to avoid high order allocations and use > flex_array instead, so i tried to do the performance measurements with > options you kindly suggested.
Nice, thanks! ... > As we can see single stream tests do not show any noticeable degradation, > and SCTP_*_MANY tests spread decreased significantly when -S/-s options are > used, > but still too big to consider the performance test pass or fail. > > Can you please advise anything else to try - to decrease the dispersion rate - In addition, you can try also using a veth tunnel or reducing lo mtu down to 1500, and also make use of sctp tests (need to be after the -- ) option -m 1452. These will alleaviate issues with cwnd handling that happen on loopback due to the big MTU and minimize issues with rwnd/buffer size too. Even with -S, -s, -m and the lower MTU, it is usual to see some fluctuation, but not that much. > or can we just consider values are fine and i'm reworking the patch according > to your comment about sctp_stream_in(asoc, sid)/sctp_stream_in_ptr(stream, > sid) > and that's it? Ok, thanks. It seems so, yes. Marcelo
