Re: [dpdk-dev] Jumbo Frame in pktgen & dpdk-pktgen

[Nirmal Sarkar <nirmal.kisan@gmail.com>]

Hello Keith,

Thanks a lot for your help.
I'm using pktgen-3.7.1. So I'll pull your changes there and check it.

Regards,
N. Sarkar

On Sat, Nov 30, 2019 at 5:31 AM Wiles, Keith <keith.wiles@intel.com> wrote:

>
>
> > On Nov 19, 2019, at 11:42 AM, Roberts, Lee A. <lee.roberts@hpe.com>
> wrote:
> >
> > 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
>
> I have a updated pktgen with jumbo support. You need to pass the -j option
> to get jumbo frame support in pktgen. I have not done a lot of testing on
> this version. If you have time please pull the pktgen repo and switch over
> to the ‘dev’ branch and see if this work for you. I did not use your
> changes here and did it my way :-)
>
> I did not change DPDK, as it seemed like it did not matter if
> RTE_MBUF_DEFAULT_DATAROOM changed. I am sure someplace may care if they
> used that define.
>
> >
> >
> > -----Original Message-----
> > From: dev [mailto:dev-bounces@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
>
> Regards,
> Keith
>
>