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From: Bruce Richardson <bruce.richardson@intel.com>
To: Sachin Sharma <sharonsachin@gmail.com>
Cc: dev@dpdk.org
Subject: Re: [dpdk-dev] transmit functions of dpdk
Date: Wed, 10 Dec 2014 11:22:34 +0000
Message-ID: <20141210112233.GC10056@bricha3-MOBL3> (raw)
In-Reply-To: <CAH-Vi3zGF9P3uG_7DMARjVX4dbPgMDw3R0f=zzwEg0obfQhqFw@mail.gmail.com>

On Wed, Dec 10, 2014 at 12:03:41PM +0100, Sachin Sharma wrote:
> Dear all,
>  In my algorithm, I am interested to perform  two activities - (1)
> transmitting packets to a tx_queue and (2) transmitting packets from
> tx_queue to a wire - separately. I have gone through the code by putting
> logs in the dpdk code and found that there is a function rte_eth_tx_burst
> which transmits packets to a specific queue. However, when I debugged more
> then I found that this function just calls eth_igb_xmit_pkts
> from librte_pmd_e1000, and this function just directly write the packets to
> the wire by writing all packets into registers. Could you please suggest
> how to implement these two functions if these are not implemented already
> in dpdk?
> Thanks & Regards,
> Sachin.

Hi Sachin,

anything written to the NIC TX queue is automatically put onto the wire unless
the NIC port is down or the wire is unplugged etc. What is your use-case that you
need to do this? I would suggest doing internal buffering in your application,
as many DPDK example applications do, and then call tx_burst to put your packets
on the wire when you want this capability.


  reply	other threads:[~2014-12-10 11:22 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-12-10 11:03 Sachin Sharma
2014-12-10 11:22 ` Bruce Richardson [this message]
2014-12-10 11:31   ` Sachin Sharma
2014-12-10 11:45     ` Bruce Richardson
2014-12-10 12:09       ` Sachin Sharma
2014-12-10 13:37         ` Bruce Richardson
2014-12-10 14:14           ` Sachin Sharma

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