Can you send me an lspci -vvv dump for the card. The main piece I am interested in seeing is the link status register output. I just want to verify that you are linked at x8 gen2.
- Alex On Wed, Sep 7, 2016 at 4:00 PM, Hank Liu <hank.tz...@gmail.com> wrote: > Nope, no help. Still seeing pause frames or rx_no_dma_resource when BW is up > to 8 Gbps... > > On Wed, Sep 7, 2016 at 3:42 PM, Hank Liu <hank.tz...@gmail.com> wrote: >> >> 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 >> >> > ------------------------------------------------------------------------------ _______________________________________________ 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
