From: "Wang, Haiyue" <haiyue.wang@intel.com>
To: Perugu Hemasai Chandra Prasad <hemasaiperugu@5g.iith.ac.in>,
"users@dpdk.org" <users@dpdk.org>, "dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] unable to receive packets less than 4 with rte_eth_rx_burst Api -regarding.
Date: Tue, 3 Sep 2019 07:02:22 +0000 [thread overview]
Message-ID: <E3B9F2FDCB65864C82CD632F23D8AB8773D655F0@shsmsx102.ccr.corp.intel.com> (raw)
In-Reply-To: <CALJSgO6Syz2euxN9fQ=sX+53LUdtf17t66g9xksdDALEbox=9Q@mail.gmail.com>
Some PMD Vector Rx for performance has an hidden limitation like :
/* nb_pkts shall be less equal than RTE_I40E_MAX_RX_BURST */
nb_pkts = RTE_MIN(nb_pkts, RTE_I40E_MAX_RX_BURST);
/* nb_pkts has to be floor-aligned to RTE_I40E_DESCS_PER_LOOP */
nb_pkts = RTE_ALIGN_FLOOR(nb_pkts, RTE_I40E_DESCS_PER_LOOP); <------ ;-)
#define RTE_I40E_DESCS_PER_LOOP 4
BR,
Haiyue
> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Perugu Hemasai Chandra Prasad
> Sent: Tuesday, September 3, 2019 13:00
> To: users@dpdk.org; dev@dpdk.org
> Subject: [dpdk-dev] unable to receive packets less than 4 with rte_eth_rx_burst Api -regarding.
>
> Hi All,
> I am trying to receive packets transmitted by another DPDK
> application running on different system. I am able to transmit packets with
> a burst value of 1 using rte_eth_tx_burst Api, but unable to receive
> packets with a burst value less than 4 using rte_eth_rx_burst Api. can
> anyone please tell me the reason behind that? Is that because of any EthDev
> configuration?. How to receive packets with a burst value of 1?
>
> Thanks & Regards,
> Hemasai
next prev parent reply other threads:[~2019-09-03 7:02 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-03 5:00 Perugu Hemasai Chandra Prasad
2019-09-03 7:02 ` Wang, Haiyue [this message]
2019-09-03 9:23 ` Perugu Hemasai Chandra Prasad
2019-09-03 9:47 ` Perugu Hemasai Chandra Prasad
2019-09-03 11:33 ` Wang, Haiyue
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