| commit | aa570d6fb6bd0402f27f151a76fb1762e26231ac | |
| author | Paolo Bonzini <pbonzini@redhat.com> | |
| Sun, 31 Jan 2016 10:29:03 +0000 (31 11:29 +0100) | ||
| committer | Michael S. Tsirkin <mst@redhat.com> | |
| Sat, 6 Feb 2016 18:44:08 +0000 (6 20:44 +0200) | ||
| tree | 72a395aaa63618c27fca222a02069a19e773bf09 | treesnapshot (tar.gz zip) |
| parent | 5dba97ebdc92f1ac3c9ac27d8eac52ed2348fae1 | commitdiff |
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>
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>
| hw/virtio/virtio.c | diffblobblamehistory |