HI Alexander, Thanks for your input. Will give it a try.
Hank On Wed, Sep 7, 2016 at 3:23 PM, Alexander Duyck <alexander.du...@gmail.com> wrote: > On Wed, Sep 7, 2016 at 2:19 PM, Rustad, Mark D <mark.d.rus...@intel.com> > wrote: > > Hank Liu <hank.tz...@gmail.com> wrote: > > > >>> *From:* Hank Liu [mailto:hank.tz...@gmail.com] > >>> *Sent:* Wednesday, September 07, 2016 10:20 AM > >>> *To:* Skidmore, Donald C <donald.c.skidm...@intel.com> > >>> *Cc:* e1000-devel@lists.sourceforge.net > >>> *Subject:* Re: [E1000-devel] Intel 82599 AXX10GBNIAIOM cards for 10G > SFPs > >>> UDP performance issue > >>> > >>> > >>> > >>> Thanks for quick response and helping. I guess I didn't make it clear > is > >>> that the application (receiver, sender) open 240 connections each > >>> connection has 34 Mbps traffic. > > > > > > You say that there are 240 connections, but how many threads is your app > > using? One per connection? What does the cpu utilization look like on the > > receiving end? > > > > Also, the current ATR implementation does not support UDP, so you are > > probably better off not pinning the app threads at all and trusting that > the > > scheduler will migrate them to the cpu that is getting their packets via > > RSS. You should still set the affinity of the interrupts in that case. > The > > default number of queues should be fine. > > If you are running point to point with UDP traffic and are not > fragmenting packets I would recommend enabling RSS for UDP flows. You > can do that via the following command: > ethtool -N <interface> rx-flow-hash udp4 sdfn > > That should allow the work to spread to more queues than just the one > that is currently being selected based on your source and destination > IP addresses. > > - Alex >
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