* dpdk is dropping some packets @ 2015-02-02 14:50 Sachin Sharma [not found] ` <CAH-Vi3wDMbTQ3yPq_RYX1oWv48xqQ5sCaprAZM6-eerFKmfauA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 0 siblings, 1 reply; 3+ messages in thread From: Sachin Sharma @ 2015-02-02 14:50 UTC (permalink / raw) To: dev-VfR2kkLFssw Hi all, I have implemented an application on the dpdk, which transmits 42 packets using rte_eth_tx_burst by a burst. There is no error while transmitting i.e. rte_eth_tx_burst always return 42. However, when I tcpdump the packets on the neighboring node only 30 packets are received and the other 10 are getting dropped. I am receiving the same issue in both the cases : (1) transmitting a burst of 42 packets, or (2) transmitting 42 packets one by one using the rte_eth_tx_burst. The packet size is 100 bytes. I do not see this as a normal behaviour? If this is so, could you please let me know why these are getting dropped without sending an error condition to the application? Thanks, Sachin. ^ permalink raw reply [flat|nested] 3+ messages in thread
[parent not found: <CAH-Vi3wDMbTQ3yPq_RYX1oWv48xqQ5sCaprAZM6-eerFKmfauA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>]
* Re: dpdk is dropping some packets [not found] ` <CAH-Vi3wDMbTQ3yPq_RYX1oWv48xqQ5sCaprAZM6-eerFKmfauA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> @ 2015-02-02 14:57 ` Wiles, Keith [not found] ` <D0F4EBBC.11858%keith.wiles-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org> 0 siblings, 1 reply; 3+ messages in thread From: Wiles, Keith @ 2015-02-02 14:57 UTC (permalink / raw) To: Sachin Sharma, dev-VfR2kkLFssw On 2/2/15, 8:50 AM, "Sachin Sharma" <sharonsachin-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote: >Hi all, > >I have implemented an application on the dpdk, which transmits 42 packets >using rte_eth_tx_burst by a burst. There is no error while transmitting >i.e. rte_eth_tx_burst always return 42. However, when I tcpdump the >packets >on the neighboring node only 30 packets are received and the other 10 are >getting dropped. I am receiving the same issue in both the cases : (1) >transmitting a burst of 42 packets, or (2) transmitting 42 packets one by >one using the rte_eth_tx_burst. The packet size is 100 bytes. I do not >see >this as a normal behaviour? If this is so, could you please let me know >why >these are getting dropped without sending an error condition to the >application? Did you verify the packets are transmitted, meaning you should have been able to note the counters on the RX side to verify they were not sent or maybe they were dropped at the RX port? Look at the missed counter and RX counters on the receiving machine to verify the packets are not sent from DPDK. In all most all cases when sending a low number of packets they are sent, but the receiver was not able to consume the packets at that rate. > > >Thanks, >Sachin. ^ permalink raw reply [flat|nested] 3+ messages in thread
[parent not found: <D0F4EBBC.11858%keith.wiles-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>]
* Re: dpdk is dropping some packets [not found] ` <D0F4EBBC.11858%keith.wiles-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org> @ 2015-02-02 15:56 ` Sachin Sharma 0 siblings, 0 replies; 3+ messages in thread From: Sachin Sharma @ 2015-02-02 15:56 UTC (permalink / raw) To: Wiles, Keith; +Cc: dev-VfR2kkLFssw Thank you very much Keith!! It was the problem with the tcpdump! it was not able to capture all the packets. When I read the RX counters, it is exactly 42 packets! Thanks, On Mon, Feb 2, 2015 at 3:57 PM, Wiles, Keith <keith.wiles-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org> wrote: > > > On 2/2/15, 8:50 AM, "Sachin Sharma" <sharonsachin-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote: > > >Hi all, > > > >I have implemented an application on the dpdk, which transmits 42 packets > >using rte_eth_tx_burst by a burst. There is no error while transmitting > >i.e. rte_eth_tx_burst always return 42. However, when I tcpdump the > >packets > >on the neighboring node only 30 packets are received and the other 10 are > >getting dropped. I am receiving the same issue in both the cases : (1) > >transmitting a burst of 42 packets, or (2) transmitting 42 packets one by > >one using the rte_eth_tx_burst. The packet size is 100 bytes. I do not > >see > >this as a normal behaviour? If this is so, could you please let me know > >why > >these are getting dropped without sending an error condition to the > >application? > > Did you verify the packets are transmitted, meaning you should have been > able to note the counters on the RX side to verify they were not sent or > maybe they were dropped at the RX port? Look at the missed counter and RX > counters on the receiving machine to verify the packets are not sent from > DPDK. In all most all cases when sending a low number of packets they are > sent, but the receiver was not able to consume the packets at that rate. > > > > > >Thanks, > >Sachin. > > ^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2015-02-02 15:56 UTC | newest] Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2015-02-02 14:50 dpdk is dropping some packets Sachin Sharma [not found] ` <CAH-Vi3wDMbTQ3yPq_RYX1oWv48xqQ5sCaprAZM6-eerFKmfauA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2015-02-02 14:57 ` Wiles, Keith [not found] ` <D0F4EBBC.11858%keith.wiles-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org> 2015-02-02 15:56 ` Sachin Sharma
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