[V3,15/15] vhost: enable packed virtqueues
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Message ID 20190717105255.63488-16-jasowang@redhat.com
State New
Headers show
Series
  • Packed virtqueue support for vhost
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Commit Message

Jason Wang July 17, 2019, 10:52 a.m. UTC
This patch enables packed virtqueue support for vhost.

Testpmd (virtio-user) + vhost_net shows about 2.6% improvemetn on TX
PPS:

Before: 5.75Mpps
After : 5.90Mpps

Signed-off-by: Jason Wang <jasowang@redhat.com>
---
 drivers/vhost/vhost.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Patch
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diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h
index bb3f8bb763b9..5483eea84a5c 100644
--- a/drivers/vhost/vhost.h
+++ b/drivers/vhost/vhost.h
@@ -326,7 +326,8 @@  enum {
 			 (1ULL << VIRTIO_RING_F_EVENT_IDX) |
 			 (1ULL << VHOST_F_LOG_ALL) |
 			 (1ULL << VIRTIO_F_ANY_LAYOUT) |
-			 (1ULL << VIRTIO_F_VERSION_1)
+			 (1ULL << VIRTIO_F_VERSION_1) |
+			 (1ULL << VIRTIO_F_RING_PACKED)
 };
 
 static inline bool vhost_has_feature(struct vhost_virtqueue *vq, int bit)