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From: "Morten Brørup" <mb@smartsharesystems.com>
To: "John McNamara" <john.mcnamara@intel.com>,
	"Marko Kovacevic" <marko.kovacevic@intel.com>
Cc: "Thomas Monjalon" <thomas@monjalon.net>,
	"Ferruh Yigit" <ferruh.yigit@intel.com>,
	"Andrew Rybchenko" <arybchenko@solarflare.com>,
	"Nirmal Sarkar" <nirmal.kisan@gmail.com>,
	"Roberts, Lee A." <lee.roberts@hpe.com>, <dev@dpdk.org>
Subject: Re: [dpdk-dev] Jumbo Frame in pktgen & dpdk-pktgen
Date: Tue, 19 Nov 2019 21:44:38 +0100
Message-ID: <98CBD80474FA8B44BF855DF32C47DC35C60C14@smartserver.smartshare.dk> (raw)
In-Reply-To: <DF4PR8401MB077780C0CDA70DD6A8788151E54C0@DF4PR8401MB0777.NAMPRD84.PROD.OUTLOOK.COM>

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-bounces@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-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.
2019-11-19 20:44   ` Morten Brørup [this message]
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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