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 ------------------------------------------------------------------------------ _______________________________________________ E1000-devel mailing list E1000-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/e1000-devel To learn more about Intel® Ethernet, visit http://communities.intel.com/community/wired
