On Fri, Apr 14, 2017 at 03:53:18PM +0800, Yuanhan Liu wrote:
> Like what we did for virtio PMD driver [0][1], we could also apply such
> trick to vhost, to avoid the memory write on net header when necessary.
>
> [0]: c9ea670c1dc7 ("net/virtio: fix performance regression due to TSO")
> [1]: 16994abee215 ("net/virtio: optimize header reset on any layout")
>
> With this, the cache issue of the mergeable path is again greatly reduced:
> even the write of "num_buffers" could be avoided. A quick PVP test shows
> the gap between the mergeable Rx and non-mergable Rx is pretty small now:
> they are basically the same in my test.
>
> Signed-off-by: Yuanhan Liu <yuanhan....@linux.intel.com>
Applied to dpdk-next-virtio.
--yliu
