> -----Original Message----- > From: Ananyev, Konstantin > Sent: Tuesday, October 07, 2014 5:03 PM > To: Ananyev, Konstantin > Subject: FW: [dpdk-dev] Aligned RX data. > > > > From: Alex Markuze [mailto:alex at weka.io] > Sent: Tuesday, October 07, 2014 4:52 PM > To: Ananyev, Konstantin > Cc: dev at dpdk.org > Subject: Re: [dpdk-dev] Aligned RX data. > > RTE_PKTMBUF_HEADROOM defines the headroom
Yes. >this would be true only if the buff_start was?aligned to 512 which is not. As I said: " Make sure that your all your mbufs are aligned by 512". Konstantin > > On Tue, Oct 7, 2014 at 1:05 PM, Ananyev, Konstantin <konstantin.ananyev at > intel.com> wrote: > > > > -----Original Message----- > > From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Alex Markuze > > Sent: Tuesday, October 07, 2014 10:40 AM > > To: dev at 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
