[dpdk-dev] [PATCH 2/3] vhost: optimize dequeue for small packets

2016-06-03 Thread Xie, Huawei
On 5/3/2016 8:42 AM, Yuanhan Liu wrote: > Both current kernel virtio driver and DPDK virtio driver use at least > 2 desc buffer for Tx: the first for storing the header, and the others > for storing the data. > > Therefore, we could fetch the first data desc buf before the main loop, > and do the c

[dpdk-dev] [PATCH 2/3] vhost: optimize dequeue for small packets

2016-06-03 Thread Xie, Huawei
On 6/1/2016 2:41 PM, Yuanhan Liu wrote: > On Wed, Jun 01, 2016 at 06:24:18AM +, Xie, Huawei wrote: >> On 5/3/2016 8:42 AM, Yuanhan Liu wrote: >>> Both current kernel virtio driver and DPDK virtio driver use at least >>> 2 desc buffer for Tx: the first for storing the header, and the others >>>

[dpdk-dev] [PATCH 2/3] vhost: optimize dequeue for small packets

2016-06-01 Thread Yuanhan Liu
On Wed, Jun 01, 2016 at 06:24:18AM +, Xie, Huawei wrote: > On 5/3/2016 8:42 AM, Yuanhan Liu wrote: > > Both current kernel virtio driver and DPDK virtio driver use at least > > 2 desc buffer for Tx: the first for storing the header, and the others > > for storing the data. > > Tx could prepend

[dpdk-dev] [PATCH 2/3] vhost: optimize dequeue for small packets

2016-06-01 Thread Xie, Huawei
On 5/3/2016 8:42 AM, Yuanhan Liu wrote: > Both current kernel virtio driver and DPDK virtio driver use at least > 2 desc buffer for Tx: the first for storing the header, and the others > for storing the data. Tx could prepend some space for virtio net header whenever possible, so that it could use

[dpdk-dev] [PATCH 2/3] vhost: optimize dequeue for small packets

2016-05-02 Thread Yuanhan Liu
Both current kernel virtio driver and DPDK virtio driver use at least 2 desc buffer for Tx: the first for storing the header, and the others for storing the data. Therefore, we could fetch the first data desc buf before the main loop, and do the copy first before the check of "are we done yet?". T