[dpdk-dev] About : Enable optional dequeue zero copy for vHost User
Chen, Junjie J
junjie.j.chen at intel.com
Tue Jan 23 12:49:12 CET 2018
Hi
Which version of dpdk you are using? I have some fixes for dequeue zero copy and now in 18.02-rc1, you can try 18.02-r1.
Cheers
JJ
> -----Original Message-----
> From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Loftus, Ciara
> Sent: Tuesday, January 23, 2018 6:46 PM
> To: liyang07 <liyang07 at corp.netease.com>
> Cc: dev at dpdk.org; dev at openvswitch.org
> Subject: Re: [dpdk-dev] About : Enable optional dequeue zero copy for vHost
> User
>
> Hi,
>
> For the meantime this feature is proposed as ‘experimental’ for OVS DPDK.
> Unless you are transmitting to a NIC, you don’t need to set the n_txq_desc.
> My testing has been only with a DPDK driver in the guest. Have you tried that
> option?
>
> Thanks,
> Ciara
>
> From: liyang07 [mailto:liyang07 at corp.netease.com]
> Sent: Wednesday, January 17, 2018 10:41 AM
> To: Loftus, Ciara <ciara.loftus at intel.com>
> Cc: dev at dpdk.org
> Subject: About : Enable optional dequeue zero copy for vHost User
>
>
> Hi Ciara,
>
> I am tesing the function of "vHost dequeue zero copy" for vm2vm on a
> host, and I have some problems:
>
> 1. The networking is OK before run iperf, I can ping successed from vm1
> to vm2,but after run iperf, the networking between vm1 and vm2 is down;(I
> think n_txq_desc cause the problem)
>
> 2. I know the limitation about n_txq_desc, but I cannot set the
> n_txq_desc for dpdkport while the vms on the same host, because there is
> no dpdkports work fow my testing;
>
>
>
> Thus, how can I resolve it, thanks.
>
>
>
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