From: Stephen Hemminger <stephen@networkplumber.org>
To: "Lazarenko, Vlad (WorldQuant)" <Vlad.Lazarenko@worldquant.com>
Cc: "users@dpdk.org" <users@dpdk.org>
Subject: Re: [dpdk-users] When do we get non-contiguous mbufs from rte_eth_rx_burst?
Date: Thu, 9 Feb 2017 14:35:19 -0800 [thread overview]
Message-ID: <20170209143519.7fd6061a@xeon-e3> (raw)
In-Reply-To: <790E2AC11206AC46B8F4BB82078E34F80627DB12@EXUSMBX06.AD.MLP.com>
On Thu, 9 Feb 2017 22:17:56 +0000
"Lazarenko, Vlad (WorldQuant)" <Vlad.Lazarenko@worldquant.com> wrote:
> Hey everyone,
>
> Does anyone happen to know if it is possible to receive non-contiguous mbufs from rte_eth_rx_burst? If so, when would this happen? I am thinking that NICs with LSO enabled could possibly do this if data does not fit into RTE_MBUF_DEFAULT_BUF_SIZE? But if the packet fits, I don't see why the driver could possibly split that across multiple mbufs. Any insight is highly appreciated.
>
> Thanks,
> Vlad
Any driver that handles jumbo frames is going to return a multiple segment mbuf when given
a mbuf pool with smaller buffers. It is common to create 2K mbuf pool and handle 9K frames.
>
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Please don't use such Lawyer stuff on public mailing lists.
In fact according to the wording, it probably is against your rules for
me to respond to it.
next prev parent reply other threads:[~2017-02-09 22:35 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-09 22:17 Lazarenko, Vlad (WorldQuant)
2017-02-09 22:35 ` Stephen Hemminger [this message]
2017-02-10 16:20 ` Lazarenko, Vlad (WorldQuant)
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