[dpdk-dev] [PATCH v1] app/testpmd: fix Tx first with LSC interrupt

[De Lara Guarch, Pablo]

> -----Original Message-----
> From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of David Hunt
> Sent: Tuesday, July 25, 2017 11:28 AM
> To: dev at dpdk.org
> Cc: Wu, Jingjing <jingjing.wu at intel.com>; Hunt, David
> <david.hunt at intel.com>
> Subject: [dpdk-dev] [PATCH v1] app/testpmd: fix Tx first with LSC interrupt
> 
> The lsc_interrupt flag is enabled by default, and when the --tx-first is used
> as a command line parameter, the 32 packets can be sent out before the
> link state is up, resulting in the loss of the packets, and no further
> forwarding will take place.
> 
> E.g. ./build/app/testpmd -c f0 -- --tx-first --stats-period 1
> 
> When the --tx-first is used, the lsc_interrupt flag needs to be disabled,
> ensuring the links are up before forwarding traffic.  Therefore, during the
> parameter checking at startup, if --tx-first is used, we now warn the user,
> and set lsc_interrupt to 0.
> 
> Fixes: 99cabef08855 ("app/testpmd: add parameter to start forwarding Tx
> first")
> Signed-off-by: David Hunt <david.hunt at intel.com>

Acked-by: Pablo de Lara <pablo.de.lara.guarch at intel.com>