Hi Chenbo, > -----Original Message----- > From: Xia, Chenbo <[email protected]> > Sent: Monday, October 24, 2022 5:03 PM > To: Wang, YuanX <[email protected]>; Maxime Coquelin > <[email protected]> > Cc: [email protected]; Hu, Jiayu <[email protected]>; Jiang, Cheng1 > <[email protected]>; Ma, WenwuX <[email protected]>; He, > Xingguang <[email protected]> > Subject: RE: [PATCH v5] net/vhost: support asynchronous data path > > Hi Yuan, > > > -----Original Message----- > > From: Wang, YuanX <[email protected]> > > Sent: Monday, October 24, 2022 11:15 PM > > To: Maxime Coquelin <[email protected]>; Xia, Chenbo > > <[email protected]> > > Cc: [email protected]; Hu, Jiayu <[email protected]>; Jiang, Cheng1 > > <[email protected]>; Ma, WenwuX <[email protected]>; He, > > Xingguang <[email protected]>; Wang, YuanX > <[email protected]> > > 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 <[email protected]> > > Signed-off-by: Yuan Wang <[email protected]> > > Signed-off-by: Wenwu Ma <[email protected]> > > > > 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.
Sure, will update docs in new version. Thanks, Yuan > > Thanks, > Chenbo
