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From: "Roberts, Lee A." <lee.roberts@hpe.com>
To: Nirmal Sarkar <nirmal.kisan@gmail.com>, "dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] Jumbo Frame in pktgen & dpdk-pktgen
Date: Tue, 19 Nov 2019 17:42:16 +0000
Message-ID: <DF4PR8401MB077780C0CDA70DD6A8788151E54C0@DF4PR8401MB0777.NAMPRD84.PROD.OUTLOOK.COM> (raw)
In-Reply-To: <CACeX4O8HvaQx8s236+w73zxaDfqt2ScZsQ+dHfp_4aJVFxPfTw@mail.gmail.com>

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-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

  reply index

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-18 17:25 Nirmal Sarkar
2019-11-19 17:42 ` Roberts, Lee A. [this message]
2019-11-19 20:44   ` Morten Brørup
2019-11-20 12:09     ` Nirmal Sarkar
2019-11-20 18:54       ` Wiles, Keith
2019-11-26  8:21         ` Nirmal Sarkar
2019-11-27 15:12           ` Wiles, Keith
2019-11-27 18:42             ` Nirmal Sarkar
2019-11-30  0:01   ` Wiles, Keith
2019-12-01 19:55     ` Nirmal Sarkar
2019-12-02 12:46       ` Nirmal Sarkar

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