Hi Wenzhuo, > Hi Klaus, > >> -----Original Message----- >> From: Klaus Degner [mailto:kd at allegro-packets.com] >> Sent: Friday, July 17, 2015 7:56 PM >> To: Lu, Wenzhuo >> Cc: dev at dpdk.org >> Subject: jumbo frame support for 82583V >> >> Hi Wenzhuo, >> >> We are testing different Intel NICs for DPDK. We have tested the master >> branch >> with the support for 82583V Intel chip. >> It works very well except that we can only use up to 1518 bytes for maximum >> packet capture. >> We have debugged this and it is restricted in the initialization: >> >> http://dpdk.org/browse/dpdk/tree/drivers/net/e1000/em_ethdev.c#n855 >> >> Without DPDK, the linux driver support and mtu up to 9k and ark.intel reports >> that this chip is jumbo frame capable: >> >> http://ark.intel.com/de/products/41676/Intel-82583V-Gigabit-Ethernet- >> Controller >> >> Is there any specific reason why DPDK cannot use jumbo frames for this NIC ? >> >> Thanks for help ! >> >> Klaus > Sorry, I'm not sure about the history. > According to the datasheet's update log, 82583v doesn't support jumbo frame > at first. > I think the reason is the e1000 code is not updated after the datasheet said > the jumbo frame is supported. > As I don?t have the NIC on hand, would you like to change the code and have a > try. I mean just let > " case e1000_82583" return 9K. Thanks.
The DPDK jumbo frame send and receive works for 82583V. We have tested it with 4x 85283V and the setup: Linux send --> DPDK receive --> DPDK send --> Linux receive We could send a 9k packet via this data path and have verified the content of it. I can generate a patch for DPDK if this is enough testing for you. Thanks, Klaus
