On Fri, Feb 18, 2022 at 06:49:19AM +0000, Ma, WenwuX wrote: > > > > -----Original Message----- > > From: Richardson, Bruce <bruce.richard...@intel.com> > > Sent: 2022年2月17日 17:06 > > To: Ma, WenwuX <wenwux...@intel.com> > > Cc: Burakov, Anatoly <anatoly.bura...@intel.com>; dev@dpdk.org; Hu, > > Jiayu <jiayu...@intel.com>; Wang, Yinan <yinan.w...@intel.com>; He, > > Xingguang <xingguang...@intel.com> > > Subject: Re: [PATCH] examples/multi_process: add options to control port > > configuration > > > > On Thu, Feb 17, 2022 at 03:17:55PM +0000, Wenwu Ma wrote: > > > The default values of rx mq_mode and rx offloads for port will cause > > > symmetric_mp startup failure if the port do not support rss or csum. > > > Therefore, we added two new options --rx-mq-mode and --rx-offloads, > > > through which the user can set the values appropriately according to > > > the situation to make app startup normally. > > > > > > Signed-off-by: Wenwu Ma <wenwux...@intel.com> --- > > > > The idea seems reasonable enough, but I think the implementation requiring > > the user to pass in special "magic numbers" for the offload values is not a > > good idea. Perhaps add in a separate flag for "no-csum" to disable that. > > > > For the no-rss case, can you explain how you would see this app being used > > in the absense of RSS support to distribute traffic among the separate > > processes? > > When app run in qemu vm and the backend is dpdk vhost, it will report error > below: > "virtio_dev_configure(): RSS support requested but not supported by the > device"
Sure, I understand that. But how does it make sense to run multiple copies of the app if RSS cannot be used to spread the traffic between the instances?
