[dpdk-dev] [PATCH 0/3] [RFC] vhost: micro vhost optimization
yuanhan.liu at linux.intel.com
Tue Jun 14 14:42:09 CEST 2016
Applied to dpdk-next-virtio.
On Mon, May 02, 2016 at 05:46:15PM -0700, Yuanhan Liu wrote:
> Here is a small patch set does the micro optimization, which brings about
> 10% performance boost in my 64B packet testing, with the following topo:
> pkt generator <----> NIC <-----> Virtio NIC
> Patch 1 pre updates the used ring and update them in batch. It should be
> feasible from my understanding: there will be no issue, guest driver will
> not start processing them as far as we haven't updated the "used->idx"
> yet. I could miss something though.
> Patch 2 saves one check for small packets (that can be hold in one desc
> buf and mbuf).
> Patch 3 moves several frequently used fields into one cache line, for
> better cache sharing.
> Note that this patch set is based on my latest vhost ABI refactoring patchset.
> Yuanhan Liu (3):
> vhost: pre update used ring for Tx and Rx
> vhost: optimize dequeue for small packets
> vhost: arrange virtio_net fields for better cache sharing
> lib/librte_vhost/vhost-net.h | 8 +--
> lib/librte_vhost/vhost_rxtx.c | 110 ++++++++++++++++++++++++------------------
> 2 files changed, 68 insertions(+), 50 deletions(-)
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