[dpdk-users] [dpdk-dev] rte_mbuf size for jumbo frame

Polehn, Mike A mike.a.polehn at intel.com
Tue Jan 26 15:01:59 CET 2016

Jumbo frames are generally handled by link lists (but called something else) of mbufs.
Enabling jumbo frames for the device driver should enable the right portion of the driver which handles the linked lists.

Don't make the mbufs huge.


-----Original Message-----
From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Masaru OKI
Sent: Monday, January 25, 2016 2:41 PM
To: Saurabh Mishra; users at dpdk.org; dev at dpdk.org
Subject: Re: [dpdk-dev] rte_mbuf size for jumbo frame


1. Take care of unit size of mempool for mbuf.
2. Call rte_eth_dev_set_mtu() for each interface.
    Note that some PMDs does not supported change MTU.

On 2016/01/26 6:02, Saurabh Mishra wrote:
> Hi,
> We wanted to use 10400 bytes size of each rte_mbuf to enable Jumbo frames.
> Do you guys see any problem with that? Would all the drivers like 
> ixgbe, i40e, vmxnet3, virtio and bnx2x work with larger rte_mbuf size?
> We would want to avoid detailing with chained mbufs.
> /Saurabh

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