Hi Klaus, > -----Original Message----- > From: Klaus Degner [mailto:kd at allegro-packets.com] > Sent: Monday, July 20, 2015 5:21 PM > To: Lu, Wenzhuo > Cc: dev at dpdk.org > Subject: Re: jumbo frame support for 82583V > > 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. Many thanks for verifying this. I think that's enough. If you'd like creating a patch for it, please move on:)
> > Thanks, > > Klaus
