Re: [PATCH v4] vhost: support CPU copy for small packets

2024-10-03 Thread Stephen Hemminger
On Mon, 29 Aug 2022 08:56:58 +0800 Wenwu Ma wrote: > Offloading small packets to DMA degrades throughput 10%~20%, > and this is because DMA offloading is not free and DMA is not > good at processing small packets. In addition, control plane > packets are usually small, and assign those packets to

RE: [PATCH v4] vhost: support CPU copy for small packets

2022-09-27 Thread Morten Brørup
> From: Ma, WenwuX [mailto:wenwux...@intel.com] > Sent: Tuesday, 27 September 2022 09.32 > > > From: Morten Brørup > > Sent: 2022年9月7日 22:47 > > > > > From: Wenwu Ma [mailto:wenwux...@intel.com] > > > Sent: Monday, 29 August 2022 02.57 > > > > > > Offloading small packets to DMA degrades throughp

RE: [PATCH v4] vhost: support CPU copy for small packets

2022-09-27 Thread Ma, WenwuX
heng1 ; Wang, YuanX > Subject: RE: [PATCH v4] vhost: support CPU copy for small packets > > > From: Wenwu Ma [mailto:wenwux...@intel.com] > > Sent: Monday, 29 August 2022 02.57 > > > > Offloading small packets to DMA degrades throughput 10%~20%, and this >

RE: [PATCH v4] vhost: support CPU copy for small packets

2022-09-07 Thread Morten Brørup
> From: Wenwu Ma [mailto:wenwux...@intel.com] > Sent: Monday, 29 August 2022 02.57 > > Offloading small packets to DMA degrades throughput 10%~20%, > and this is because DMA offloading is not free and DMA is not > good at processing small packets. In addition, control plane > packets are usually s

[PATCH v4] vhost: support CPU copy for small packets

2022-08-28 Thread Wenwu Ma
Offloading small packets to DMA degrades throughput 10%~20%, and this is because DMA offloading is not free and DMA is not good at processing small packets. In addition, control plane packets are usually small, and assign those packets to DMA will significantly increase latency, which may cause tim