From: Alex Markuze <alex@weka.io>
To: "Ananyev, Konstantin" <konstantin.ananyev@intel.com>
Cc: "dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] Aligned RX data.
Date: Tue, 7 Oct 2014 18:51:39 +0300 [thread overview]
Message-ID: <CAKfHP0X=7_gXDJ-cNJgLs6NUF8pZLtxUZvskY4KdeMsBV=U=Qg@mail.gmail.com> (raw)
In-Reply-To: <2601191342CEEE43887BDE71AB97725821391089@IRSMSX105.ger.corp.intel.com>
RTE_PKTMBUF_HEADROOM defines the headroom this would be true only if the
buff_start was aligned to 512 which is not.
On Tue, Oct 7, 2014 at 1:05 PM, Ananyev, Konstantin <
konstantin.ananyev@intel.com> wrote:
>
>
> > -----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 15:44 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
2014-10-07 15:51 ` Alex Markuze [this message]
[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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