Re: [dpdk-dev] rte_eth_rx_burst stops running on dpdk extlib

[Jose Gavine Cueto <pepedocs@gmail.com>]

Hi,

Could someone help me ?  Or at least let me know if what I'm doing (diagram
above) is right with regard to using a external dpdk library ?  I assume
dpdk external libraries can be treated as norma C libraries.

Cheers,
Pepe


On Wed, Oct 30, 2013 at 8:18 AM, Jose Gavine Cueto <pepedocs@gmail.com>wrote:

> Hi,
>
> I'm writing a very simple packet dump application that can be described by
> the following diagram:
>
>  ---------------------------
> |        pktdump        |
>  ----------------------------
> | PMD lib extension |
> |         (extlib)          |
>  ----------------------------
> | DPDK PMD lib      |
>  ----------------------------
>
> pktdump - very simple app. built with gcc and linked with pmd lib
> extension and dpdk libs.
> pmd lib extension - an extension of dpdk pmd library, which provides some
> higher-level APIs
> dpdk pmd lib - pmd lib provided by Intel
>
> I have an issue where in when I run the pktdump app. it's lcore threads
> stops executing at varying number of times.  Sometimes it doesn't even run.
> But this only happens if I use the PMD lib extension.  On the other hand,
> if pktdump is directly built with pmd lib extension code while pmd lib
> extension is built as an extapp, it works very well.  I wonder what's the
> difference, code-wise there is none, the only difference I can see is how
> they are built (extapp, extlib).
>
> The pmd lib extension's lcore threads basically do simple forwarding (rx
> -> tx).  So rte_eth_rx_burst is called when receiving packets and
> rte_eth_tx_burst when transmitting packets.  These runs on an lcore thread.
>
> snippet of code that runs on lcore:
>
> void burst_fwd(...){
>  num_rx = rte_eth_rx_burst(...)
>  ...
>  rte_eth_tx_burst(...)
> }
>
> Any tips on how to debug this, some quick inspections may help.  Is there
> some specific build options for building libraries, because this only
> happens on extlib.
>



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