[dpdk-dev] rte_ixgbevf_pmd not reporting dropped packets

Lu, Wenzhuo wenzhuo.lu at intel.com
Tue Nov 8 02:20:53 CET 2016


Hi Francesco,


> -----Original Message-----
> From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Montorsi, Francesco
> Sent: Tuesday, November 8, 2016 1:17 AM
> To: dev at dpdk.org
> Subject: [dpdk-dev] rte_ixgbevf_pmd not reporting dropped packets
> 
> Hi all,
> 
> I'm using DPDK inside the OS of a VM that is SR-IOV-accelerated.
> I noticed however that the "rte_ixgbevf_pmd" PMD does not report drops... I
> am sending packets at TX side at 14Mpps; at the RX side I'm using "testpmd" and
> it's reporting 'just' 12Mpps, but zero drops (also through xstats).
> 
> Is this a known bug?
> I found a message at
>   http://dpdk.org/ml/archives/dev/2016-March/035374.html
> reporting a similar issue back in March this year...
It's a known limitation. The stats are got from HW. But there're very limited counters for VF. There's no similar counter as imiss for VF :(

> 
> 
> Thanks,
> 
> Francesco Montorsi



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