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aa570d6fb6
qemu/hw/virtio
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Paolo Bonzini aa570d6fb6 virtio: combine the read of a descriptor 
Compared to vring, virtio has a performance penalty of 10%.  Fix it
by combining all the reads for a descriptor in a single address_space_read
call.  This also simplifies the code nicely.

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: combine the read of a descriptor 2016-02-06 20:44:08 +02:00