Hi Yuan, > -----Original Message----- > From: Wang, YuanX <yuanx.w...@intel.com> > Sent: Monday, October 24, 2022 11:15 PM > To: Maxime Coquelin <maxime.coque...@redhat.com>; Xia, Chenbo > <chenbo....@intel.com> > Cc: dev@dpdk.org; Hu, Jiayu <jiayu...@intel.com>; Jiang, Cheng1 > <cheng1.ji...@intel.com>; Ma, WenwuX <wenwux...@intel.com>; He, Xingguang > <xingguang...@intel.com>; Wang, YuanX <yuanx.w...@intel.com> > Subject: [PATCH v5] net/vhost: support asynchronous data path > > Vhost asynchronous data-path offloads packet copy from the CPU > to the DMA engine. As a result, large packet copy can be accelerated > by the DMA engine, and vhost can free CPU cycles for higher level > functions. > > In this patch, we enable asynchronous data-path for vhostpmd. > Asynchronous data path is enabled per tx/rx queue, and users need > to specify the DMA device used by the tx/rx queue. Each tx/rx queue > only supports to use one DMA device, but one DMA device can be shared > among multiple tx/rx queues of different vhost PMD ports. > > Two PMD parameters are added: > - dmas: specify the used DMA device for a tx/rx queue. > (Default: no queues enable asynchronous data path) > - dma-ring-size: DMA ring size. > (Default: 4096). > > Here is an example: > --vdev > 'eth_vhost0,iface=./s0,dmas=[txq0@0000:00.01.0;rxq0@0000:00.01.1],dma- > ring-size=4096' > > Signed-off-by: Jiayu Hu <jiayu...@intel.com> > Signed-off-by: Yuan Wang <yuanx.w...@intel.com> > Signed-off-by: Wenwu Ma <wenwux...@intel.com> >
Sorry that I just realize that we need to change release notes because this is new feature for vhost PMD. Please mention the async support and new driver api you added. Thanks, Chenbo
