Hi Jiayu,
On 5/23/22 02:38, Hu, Jiayu wrote:
Hi Maxime,
-----Original Message-----
From: Maxime Coquelin <maxime.coque...@redhat.com>
Sent: Tuesday, April 19, 2022 5:10 PM
To: Ma, WenwuX <wenwux...@intel.com>; Xia, Chenbo
<chenbo....@intel.com>; dev@dpdk.org
Cc: Hu, Jiayu <jiayu...@intel.com>; Wang, Yinan <yinan.w...@intel.com>;
He, Xingguang <xingguang...@intel.com>; Ling, WeiX <weix.l...@intel.com>
Subject: Re: [PATCH] vhost: support sync copy when data buffer is small
Hi Wenwu,
On 4/11/22 15:38, Wenwu Ma wrote:
In async datapath, if the length of data buffer is less than 256, the
data will be copied by CPU instead of DMA.
Signed-off-by: Wenwu Ma <wenwux...@intel.com>
---
lib/vhost/vhost.h | 6 ++-
lib/vhost/virtio_net.c | 96 ++++++++++++++++++++++++++++++------------
2 files changed, 73 insertions(+), 29 deletions(-)
As I mentioned in the past, let's have a DMA-only solution working before
trying to support CPU copy for small packets.
Thanks for your suggestion.
For "DMA-only solution working", do you mean community reaches an
agreement on OVS DSA design? The reason of asking this question is
that we will have some following patches around async vhost in 22.11,
like vhostpmd supporting async vhost data-path. Regarding your suggestion,
do you think they also need to be deferred until "DMA-only solution working"?
No, I was just referring to CPU copy for small buffers features.
Thanks,
Maxime
Thanks,
Jiayu
Thanks,
Maxime
