DPDK usage discussions
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From: ppnaik <ppnaik@cse.iitb.ac.in>
To: Yuanhan Liu <yuanhan.liu@linux.intel.com>
Cc: mitali <mitaliyada@cse.iitb.ac.in>, <users@dpdk.org>, <dev@dpdk.org>
Subject: Re: [dpdk-users] [dpdk-dev] seg fault in InterVM communication using virtio
Date: Thu, 02 Mar 2017 16:43:19 +0530	[thread overview]
Message-ID: <ee31de3ad77c68726b49df56dfd8d718@cse.iitb.ac.in> (raw)
In-Reply-To: <20170223062714.GX18844@yliu-dev.sh.intel.com>

Hi,

We have some doubt regarding virtio front end. As we are running dpdk 
application inside VM with virtio setup, do we need to use virtio 
specific functions like virtio_recv_pkts() and virtio_xmit_pkts() to 
receive and transmit packets, functions for port initialization like 
virtio_dev_queue_setup()? If yes, we are unable to find any application 
which uses these functions. Can you provide us some pointers on examples 
which uses these functions.

Thanks,
Priyanka


On 2017-02-23 11:57, Yuanhan Liu wrote:
> On Wed, Feb 22, 2017 at 02:25:29PM +0530, mitali wrote:
>> Hi Yuanhan,
>>
>> We are using virt-manager to start the VMs. We are attaching the 
>> image which
>> shows the vNIC setup for the VMs.
>>
>> We have written our own dpdk application to send and receive UDP 
>> packets. The
>> command we are using is
>>
>> ./build/app/dpdkapi -c 1 -- -p 1 where dpdkapi is our application.
>>
>> Inside the application we are sending and receiving packets from 
>> vNIC using
>> rte_eth_tx_burst() and rte_eth_rx_burst().
>>
>> At the sender side after 127 packets the application stops and we 
>> observe a seg
>> fault in dmesg. Using the print statements we observed that it 
>> faults in
>> rte_eth_tx_burst(). All the 127 were received at the receiving VM.
>
> Would you recompile dpdk with debug info enaled, which could be done 
> by:
>
> 	make ... EXTRA_CFLAGS='-g3 -O0'
>
> And run it with gdb then dump the call stack?
>
> 	--yliu

      parent reply	other threads:[~2017-03-02 11:13 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-02-20 10:30 [dpdk-users] " Priyanka
2017-02-22  8:43 ` [dpdk-users] [dpdk-dev] " Yuanhan Liu
2017-02-22  8:55   ` mitali
2017-02-23  6:27     ` Yuanhan Liu
2017-03-01 13:50       ` mitali
2017-03-02 12:23         ` Yuanhan Liu
2017-03-02 12:32           ` mitali
2017-03-02 12:59             ` Yuanhan Liu
2017-03-02 14:00               ` mitali
2017-03-02 11:13       ` ppnaik [this message]

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