From: "Ananyev, Konstantin" <konstantin.ananyev@intel.com>
To: Alex Markuze <alex@weka.io>, "dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] Aligned RX data.
Date: Tue, 7 Oct 2014 10:05:19 +0000 [thread overview]
Message-ID: <2601191342CEEE43887BDE71AB97725821391089@IRSMSX105.ger.corp.intel.com> (raw)
In-Reply-To: <CAKfHP0XoA2jxmR7j0SAT_gWMnS+o6HCTB1-Gj0v4NjL27hQJvg@mail.gmail.com>
> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Alex Markuze
> Sent: Tuesday, October 07, 2014 10:40 AM
> To: dev@dpdk.org
> Subject: [dpdk-dev] Aligned RX data.
>
> Hi , I'm trying to receive aligned packets from the wire.
> Meaning that for all received packets the pkt.data is always aligned to
> (512 -H).
>
> Looking at the pmds of ixgbe/vmxnet I see that the pmds call
> __rte_mbuf_raw_alloc and set the rx descriptor with a
> RTE_MBUF_DATA_DMA_ADDR_DEFAULT
> Instead of the more appropriate RTE_MBUF_DATA_DMA_ADDR.
>
> Do I need to modify each pmd I'm using to be able to receive aligned data?
Make sure that your all your mbufs are aligned by 512 and set in your config RTE_PKTMBUF_HEADROOM=512-H?
> Or have I missed something?
>
> Thanks
next prev parent reply other threads:[~2014-10-07 9:58 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-07 9:40 Alex Markuze
2014-10-07 10:05 ` Ananyev, Konstantin [this message]
2014-10-07 15:51 ` Alex Markuze
[not found] ` <2601191342CEEE43887BDE71AB9772582139126C@IRSMSX105.ger.corp.intel.com>
2014-10-07 16:11 ` Ananyev, Konstantin
2014-10-11 14:04 ` Alex Markuze
2014-10-13 8:47 ` Alex Markuze
[not found] ` <2601191342CEEE43887BDE71AB9772582139336F@IRSMSX105.ger.corp.intel.com>
2014-10-13 11:43 ` Ananyev, Konstantin
2014-10-13 15:20 ` Alex Markuze
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