Jason Wang
2022-Jul-21 09:17 UTC
[RFC 0/5] In virtio-spec 1.1, new feature bit VIRTIO_F_IN_ORDER was introduced.
On Thu, Jul 21, 2022 at 4:44 PM Guo Zhi <qtxuning1999 at sjtu.edu.cn> wrote:> > When this feature has been negotiated, virtio driver will use > descriptors in ring order: starting from offset 0 in the table, and > wrapping around at the end of the table. Vhost devices will always use > descriptors in the same order in which they have been made available. > This can reduce virtio accesses to used ring. > > Based on updated virtio-spec, this series realized IN_ORDER prototype > in virtio driver and vhost.Thanks a lot for the series. I wonder if you can share any performance numbers for this? Thanks> > Guo Zhi (5): > vhost: reorder used descriptors in a batch > vhost: announce VIRTIO_F_IN_ORDER support > vhost_test: batch used buffer > virtio: get desc id in order > virtio: annouce VIRTIO_F_IN_ORDER support > > drivers/vhost/test.c | 15 +++++++++++- > drivers/vhost/vhost.c | 44 ++++++++++++++++++++++++++++++++++-- > drivers/vhost/vhost.h | 4 ++++ > drivers/virtio/virtio_ring.c | 39 +++++++++++++++++++++++++------- > 4 files changed, 91 insertions(+), 11 deletions(-) > > -- > 2.17.1 >