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From: satyavalli rama <satyavalli.rama@gmail.com>
To: dev@dpdk.org, users@dpdk.org
Subject: Re: [dpdk-users] l2fwd application are not sending continuous packets .
Date: Thu, 9 Jan 2020 07:25:45 +0530
Message-ID: <CAECt3bMF=EZga+7B9-zCP8C_dpY=Y0sspMQsn5QeTp3TRu4u8Q@mail.gmail.com> (raw)
In-Reply-To: <CAECt3bPG__2Lz_fLhRtr4oPfWNaSz+-RGvj4N86GbjxSMOa5rA@mail.gmail.com>

Can anyone please help us with this?


On Mon, Jan 6, 2020, 11:25 satyavalli rama <satyavalli.rama@gmail.com>
wrote:

>
>
>
> Hello Dpdk Team,
>
> I'm facing issue while forwarding packets in DPDK's l2fwd application.
> While sending 1 Lac packets from Scapy, I could see sometimes packets are
> sending from one VM to another VM.
> Before explaining issue let me explain topology.
>
>
>
> *Topology :-=======*1) I am having 4 VMs(Virtual Machines) in same host.
> All these VM are running on Ubuntu 16.04.1.
> 2) VM-1 is used as Scapy to forward packets (Scapy version 2.4.3) . While
> creating packets I am giving destination mac(d-mac) address of VM-1.
> 3) In VM-2 am running L2 forwarding application.
>     In this l2fwd application, I am doing simple packet forwarding by
> statically keeping mac address of VM-3.
> Code :-
>      l2fwd_mac_updating () {
>    ...
>    ......
>    .......
>       *((uint64_t *)tmp) = 0xddccbbaa/*VM-3 mac address*/ +
> ((uint64_t)dest_portid << 40);
>      }
> 4) Also in VM-3, I am doing same like VM-2, but I kept mac address of VM-4
> 5) In VM-4, I am using wireshark to see packets coming from VM-3.
> 6) In VM-2 and VM-3, I kept promiscuous mode off by commenting out
> rte_eth_promiscuous_enable().
>
>    ---------------                                   ---------------------
>                          ------------------
> ------------------------
>    |    VM-1  |      ---------->                |       VM-2     |
> ---------------->   |     VM-3    |       ------------------> |        VM-4
>      |
>    ---------------                                   ---------------------
>                          ------------------
> ------------------------
>         Scapy                              Simple L2 forwarding
>         Simple L2 forwarding                        Wireshark
> used for sending packets            Sending all packets to
>  Sending all packets to
>                                                             VM-3
>                         VM-4
>                                                           (DPDK)
>                      (DPDK)
>
>
> *Problem :- ======*==
> From scapy VM, I am sending 1 lac packets with rate of 100 packets per
> second. *During problematic condition I could see packets are not getting
> forward from VM-3.**Problematic state is happening anytime after sending
> 1k packets.*
> This issue is not consistence but I could see this issue 8 out of 10 times.
>
>
> * Debugging and Observations :-=========================*
> When I tried to debug this issue , I could see that
> 1) In problematic state, rx queue of VM-3 is not getting packets, but VM-2
> is sending packets properly. I checked this by using pdump of rx queue.
> 2) Just before problematic state in VM-3, I could see that  previous
> packet(only one packet) instead of going to VM-4, it is coming back to
> again in rx queue of VM-3 and after wards I did not get any packets in rx
> queue.
> 3) I have changed rate of packet forward 10packets per second. but still
> see the issue.
>
>
> *Can anyone please help to solve this problem ? I need it urgently .*
> Thanks,
> Satya
>

  parent reply	other threads:[~2020-01-09  1:56 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-04  7:24 Rohit kamble
     [not found] ` <CAMJ3rejbOZ5mzOYyNPFqVk-Scs7CTaVZLUQOd-GMnVpaYf+pmg@mail.gmail.com>
2020-01-06  5:55   ` [dpdk-users] Fwd: " satyavalli rama
2020-01-06  7:07     ` [dpdk-users] " satyavalli rama
2020-01-09  1:55     ` satyavalli rama [this message]
2020-01-09  6:12       ` [dpdk-users] [dpdk-dev] " Stephen Hemminger
2020-01-09 10:34         ` satyavalli rama
2020-08-17 10:41     ` [dpdk-users] Ipsec-secgw packet processing satyavalli rama
2020-08-18 10:37       ` satyavalli rama
2020-08-18 10:59         ` [dpdk-users] [dpdk-dev] " Anoob Joseph
2020-08-19 11:08           ` satyavalli rama
2020-08-26 11:23             ` satyavalli rama
2020-08-31  5:17               ` [dpdk-users] [EXT] " Anoob Joseph
2020-08-31 12:47                 ` Pathak, Pravin
2020-09-01 11:07                   ` [dpdk-users] [dpdk-dev] [EXT] " Iremonger, Bernard

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