diff options
| author |   Steven <sluong@cisco.com> | 2017-08-29 09:23:26 -0700 |
|---|---|---|
| committer |   Florin Coras <florin.coras@gmail.com> | 2017-08-30 06:56:39 +0000 |
| commit | 978788903b54a9ecdab045c67f94c4ba79633a9f (patch) | |
| tree | 7bc9e10950509422ecf12a1be5871fbabf03e144 /src/vnet/devices/virtio/vhost-user.h | |
| parent | a894434e30149338f2aa36773cf80ec1cf15a34f (diff) | |
vhost: Cache qsz_mask instead of qsz in vhost_user_vring_t
In the data path, we grab qsz from vhost_user_vring_t to compute
qsz_mask and store it in a stack variable to use on many occasions.
We never use qsz for any meaningful purpose. It is more useful to
cache qsz_mask in vhost_user_vring_t to avoid the needless computation
in the data path.
Change-Id: Idf4d94a9754d5c75c899f1f4f59602275b9904a6
Signed-off-by: Steven <sluong@cisco.com>
Diffstat (limited to 'src/vnet/devices/virtio/vhost-user.h')
| -rw-r--r-- | src/vnet/devices/virtio/vhost-user.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/vnet/devices/virtio/vhost-user.h b/src/vnet/devices/virtio/vhost-user.h index ed147a47..ad6c4219 100644 --- a/src/vnet/devices/virtio/vhost-user.h +++ b/src/vnet/devices/virtio/vhost-user.h @@ -191,7 +191,7 @@ typedef struct vhost_user_msg { typedef struct { CLIB_CACHE_LINE_ALIGN_MARK (cacheline0); - u16 qsz; + u16 qsz_mask; u16 last_avail_idx; u16 last_used_idx; u16 n_since_last_int; |