Vincenzo Maffione b796fcd1bf virtio: cache used_idx in a VirtQueue field ...

Accessing used_idx in the VQ requires an expensive access to
guest physical memory. Before this patch, 3 accesses are normally
done for each pop/push/notify call. However, since the used_idx is
only written by us, we can track it in our internal data structure.

Signed-off-by: Vincenzo Maffione <v.maffione@gmail.com>
Message-Id: <3d062ec54e9a7bf9fb325c1fd693564951f2b319.1450218353.git.v.maffione@gmail.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

2016-02-06 20:44:08 +02:00

..

dataplane

vring: slim down allocation of VirtQueueElements

2016-02-06 20:44:08 +02:00

Makefile.objs

dataplane: endianness-aware accesses

2015-02-16 15:07:16 +00:00

vhost-backend.c

virtio: Clean up includes

2016-01-29 15:07:23 +00:00

vhost-user.c

virtio: Clean up includes

2016-01-29 15:07:23 +00:00

vhost.c

virtio: Clean up includes

2016-01-29 15:07:23 +00:00

virtio-balloon.c

virtio: move allocation to virtqueue_pop/vring_pop

2016-02-06 20:39:07 +02:00

virtio-bus.c

virtio: Clean up includes

2016-01-29 15:07:23 +00:00

virtio-mmio.c

virtio: Clean up includes

2016-01-29 15:07:23 +00:00

virtio-pci.c

virtio: Clean up includes

2016-01-29 15:07:23 +00:00

virtio-pci.h

9pfs: introduce V9fsVirtioState

2016-01-12 11:04:14 +05:30

virtio-rng.c

virtio: move allocation to virtqueue_pop/vring_pop

2016-02-06 20:39:07 +02:00

virtio.c

virtio: cache used_idx in a VirtQueue field

2016-02-06 20:44:08 +02:00