If rx_dma_resources show the count from QPRDC, which is in section 8.2.3.23.75 of the datasheet. The latest datasheet is available on intel.com by searching for "82599 datasheet".
Total number of receive packets dropped for the queue. Packets can be dropped for the following reasons: 1. Rx queue is disabled in the RXDCTL[n] register. 2. No free descriptors in the Rx queue while hardware is set to Drop En in the SRRCTL[n] register or in the PFQDE register. The descriptor ring should be modifiable using ethtool -G. The exact number of descriptors and your particular tuning is dependent on your use case. There's more information available on the web and you may want to start with: https://communities.intel.com/community/wired/blog/2011/06/24/parameter-talk-tx-and-rx-descriptors Todd Fujinaka Software Application Engineer Networking Division (ND) Intel Corporation [email protected] (503) 712-4565 -----Original Message----- From: Виктор Хомюк [mailto:[email protected]] Sent: Tuesday, September 17, 2013 8:09 AM To: [email protected] Subject: [E1000-devel] rx_no_dma_resources Hello! >rx_no_dma_resources counter start to increment if packets are being dropped >due to a lack of DMA resources. Can You explain more exactly what is the reason of this counter or demonstrate an example? Is it a problem or no?Is it possible to minimize this counter? ------------------------------------------------------------------------------ LIMITED TIME SALE - Full Year of Microsoft Training For Just $49.99! 1,500+ hours of tutorials including VisualStudio 2012, Windows 8, SharePoint 2013, SQL 2012, MVC 4, more. BEST VALUE: New Multi-Library Power Pack includes Mobile, Cloud, Java, and UX Design. Lowest price ever! Ends 9/20/13. http://pubads.g.doubleclick.net/gampad/clk?id=58041151&iu=/4140/ostg.clktrk _______________________________________________ E1000-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/e1000-devel To learn more about Intel® Ethernet, visit http://communities.intel.com/community/wired ------------------------------------------------------------------------------ LIMITED TIME SALE - Full Year of Microsoft Training For Just $49.99! 1,500+ hours of tutorials including VisualStudio 2012, Windows 8, SharePoint 2013, SQL 2012, MVC 4, more. BEST VALUE: New Multi-Library Power Pack includes Mobile, Cloud, Java, and UX Design. Lowest price ever! Ends 9/20/13. http://pubads.g.doubleclick.net/gampad/clk?id=58041151&iu=/4140/ostg.clktrk _______________________________________________ E1000-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/e1000-devel To learn more about Intel® Ethernet, visit http://communities.intel.com/community/wired
