Hello, Thanks for your reply.
Using *testpmd* [*--mbuf-size=2048 --max-pkt-len=9600*], I can send/receive Jumbo pkt over vmxnet3 without any change in the dpdk source code. Ref: https://doc.dpdk.org/dts/test_plans/jumboframes_test_plan.html Can you please tell me why I will not be able to send jumbo packet from pktgen without doing any change in dpdk/EAL ? Regards, N. Sarkar On Wed, Nov 27, 2019 at 8:42 PM Wiles, Keith <keith.wi...@intel.com> wrote: > > > > On Nov 26, 2019, at 2:21 AM, Nirmal Sarkar <nirmal.ki...@gmail.com> > wrote: > > > > Hello, > > > > To support Jumbo frame in dpdk-pktgen, changes were suggested in dpdk > libraries also apart from pktgen code. > > lib/librte_mbuf/rte_mbuf.h > > lib/common/pg_inet.h > > > > But dpdk framework already supports jumbo frame [using --enable-jumbo & > --max-pkt-len flag]. > > Can you please help me to understand why do we need to change the > libraries in dpdk ? > > These flags are for l3fwd type example apps and not a flag in the EAL or > core code. > > It appears the the port configs needs to be changed to enable jumbo > frames. The patch below seemed to work for Lee and I have not tried the > patch changes. > > > > Regards, > > N. Sarkar > > > > On Thu, Nov 21, 2019 at 12:24 AM Wiles, Keith <keith.wi...@intel.com> > wrote: > > > > > > > On Nov 20, 2019, at 6:09 AM, Nirmal Sarkar <nirmal.ki...@gmail.com> > wrote: > > > > > > Hello, > > > > > > Thanks for the help. > > > As I'm using DPDK-18.11.1, I did not find the definition of > > > "RTE_ETHER_MAX_LEN" in lib/librte_net/rte_ether.h file. > > > So I set "ETHER_MAX_LEN" value to 9600. > > > Apart from that I took rest of the changes and with these I'm able to > send > > > jumbo frame. > > > Took tcpdump on the receiving end. > > > > > > Suddenly I got stuck at ARP. I could not send packets anymore. > > > > Sorry, I can not tell what the error condition is you are hitting, as > the two screen dumps do not provide me where I should start looking. If you > can help me understand the issue better. > > > > > > I've attached success & failure scenario. > > > > > > Regards, > > > N. Sarkar > > > > > > On Wed, Nov 20, 2019 at 2:14 AM Morten Brørup < > m...@smartsharesystems.com> > > > wrote: > > > > > >> John, Marko, > > >> > > >> It seems we are missing documentation about enabling Jumbo frames in > an > > >> application, and possibly an example of using the > rte_eth_dev_info->max_mtu. > > >> > > >> > > >> Med venlig hilsen / kind regards > > >> - Morten Brørup > > >> > > >>> -----Original Message----- > > >>> From: dev [mailto:dev-boun...@dpdk.org] On Behalf Of Roberts, Lee A. > > >>> Sent: Tuesday, November 19, 2019 6:42 PM > > >>> To: Nirmal Sarkar; dev@dpdk.org > > >>> Subject: Re: [dpdk-dev] Jumbo Frame in pktgen & dpdk-pktgen > > >>> > > >>> Nirmal, > > >>> > > >>> Here are the changes that I've been using to allow jumbo frames with > > >> dpdk- > > >>> 19.08 and > > >>> pktgen-19.10.0: > > >>> > > >>> diff -r default/dpdk-19.08/lib/librte_mbuf/rte_mbuf.h jumbo/dpdk- > > >>> 19.08/lib/librte_mbuf/rte_mbuf.h > > >>> 462c462 > > >>> < #define RTE_MBUF_DEFAULT_DATAROOM 2048 > > >>> --- > > >>>> #define RTE_MBUF_DEFAULT_DATAROOM 9600 > > >>> diff -r default/dpdk-19.08/lib/librte_net/rte_ether.h jumbo/dpdk- > > >>> 19.08/lib/librte_net/rte_ether.h > > >>> 33c33 > > >>> < #define RTE_ETHER_MAX_LEN 1518 /**< Maximum frame len, including > > >> CRC. > > >>> */ > > >>> --- > > >>>> #define RTE_ETHER_MAX_LEN 9600 /**< Maximum frame len, including > > >> CRC. > > >>> */ > > >>> diff -r default/pktgen-19.10.0/app/pktgen.c jumbo/pktgen- > > >>> 19.10.0/app/pktgen.c > > >>> 749c749 > > >>> < else if ( (plen >= 1024) && (plen <= PG_ETHER_MAX_LEN)) > > >>> --- > > >>>> else if ( (plen >= 1024) && (plen <= 1518)) > > >>> 753c753 > > >>> < else if (plen > PG_ETHER_MAX_LEN) > > >>> --- > > >>>> else if (plen > 1518) > > >>> diff -r default/pktgen-19.10.0/lib/common/pg_inet.h jumbo/pktgen- > > >>> 19.10.0/lib/common/pg_inet.h > > >>> 379,380c379,380 > > >>> < #define ETH_MTU 1500 /* Max MTU for > Ethernet */ > > >>> < #define ETH_MAX_PKT 1518 /* Max Ethernet frame > size > > >> */ > > >>> --- > > >>>> #define ETH_MTU 9600 /* Max MTU for Ethernet > */ > > >>>> #define ETH_MAX_PKT 9600 /* Max Ethernet frame > size > > >> */ > > >>> > > >>> - Lee Roberts > > >>> > > >>> > > >>> -----Original Message----- > > >>> From: dev [mailto:dev-boun...@dpdk.org] On Behalf Of Nirmal Sarkar > > >>> Sent: Monday, November 18, 2019 10:26 AM > > >>> To: dev@dpdk.org > > >>> Subject: [dpdk-dev] Jumbo Frame in pktgen & dpdk-pktgen > > >>> > > >>> Hello, > > >>> > > >>> I'm trying to explore pktgen and dpdk-pktgen with Jumbo frame. > > >>> > > >>> I'm using ubuntu-18.04 system where pktgen is a kernel module and I > don't > > >>> have any provision to set it for Jumbo frame. > > >>> Can you please suggest how to configure Jumbo frame in pktgen ? > > >>> > > >>> In dpdk source code, I've modified RTE_MBUF_DEFAULT_DATAROOM [ > > >>> *lib/librte_mbuf/rte_mbuf.h*] value with 9K and built. > > >>> During testing, I could not send packet size more than 1500 byte. > > >>> What is the suggestion to overcome this problem ? > > >>> > > >>> Regards, > > >>> N. Sarkar > > >> > > > <success.txt><failure.txt> > > > > Regards, > > Keith > > > > Regards, > Keith > >
