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| author | Paolo Bonzini <pbonzini@redhat.com> | 2016-01-31 11:29:03 +0100 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2016-02-06 20:44:08 +0200 |
| commit | aa570d6fb6bd0402f27f151a76fb1762e26231ac (patch) | |
| tree | 72a395aaa63618c27fca222a02069a19e773bf09 /scripts/qapi-commands.py | |
| parent | 5dba97ebdc92f1ac3c9ac27d8eac52ed2348fae1 (diff) | |
| download | focaccia-qemu-aa570d6fb6bd0402f27f151a76fb1762e26231ac.tar.gz focaccia-qemu-aa570d6fb6bd0402f27f151a76fb1762e26231ac.zip | |
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>
Diffstat (limited to 'scripts/qapi-commands.py')
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