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 ? 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 > >
