| Message ID | 20201221161456.31696-4-maxime.coquelin@redhat.com (mailing list archive) |
|---|---|
| State | New |
| Delegated to: | Maxime Coquelin |
| Headers | show |
| Series | net/virtio: make virtqueue struct cache-friendly | expand |
| Context | Check | Description |
|---|---|---|
| ci/Intel-compilation | fail | apply issues |
| ci/checkpatch | success | coding style OK |
Hi Maxime, > -----Original Message----- > From: Maxime Coquelin <maxime.coquelin@redhat.com> > Sent: Tuesday, December 22, 2020 12:15 AM > To: dev@dpdk.org; Xia, Chenbo <chenbo.xia@intel.com>; amorenoz@redhat.com; > david.marchand@redhat.com; olivier.matz@6wind.com > Cc: Maxime Coquelin <maxime.coquelin@redhat.com> > Subject: [PATCH 3/3] net/virtio: pack virtuqueue struct s/virtuqueue/virtqueue > > This patch optimizes packing of the virtuqueue Ditto With above fixed: Reviewed-by: Chenbo Xia <chenbo.xia@intel.com> > struct by moving fields around to fill holes. > > Offset field is not used and so can be removed. > > Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com> > --- > drivers/net/virtio/virtqueue.h | 18 +++++++++--------- > 1 file changed, 9 insertions(+), 9 deletions(-) > > diff --git a/drivers/net/virtio/virtqueue.h b/drivers/net/virtio/virtqueue.h > index c64e7dcbdf..3b08aac931 100644 > --- a/drivers/net/virtio/virtqueue.h > +++ b/drivers/net/virtio/virtqueue.h > @@ -245,6 +245,15 @@ struct virtqueue { > uint16_t vq_avail_idx; /**< sync until needed */ > uint16_t vq_free_thresh; /**< free threshold */ > > + /** > + * Head of the free chain in the descriptor table. If > + * there are no free descriptors, this will be set to > + * VQ_RING_DESC_CHAIN_END. > + */ > + uint16_t vq_desc_head_idx; > + uint16_t vq_desc_tail_idx; > + uint16_t vq_queue_index; /**< PCI queue index */ > + > void *vq_ring_virt_mem; /**< linear address of vring*/ > unsigned int vq_ring_size; > > @@ -257,15 +266,6 @@ struct virtqueue { > rte_iova_t vq_ring_mem; /**< physical address of vring, > * or virtual address for virtio_user. */ > > - /** > - * Head of the free chain in the descriptor table. If > - * there are no free descriptors, this will be set to > - * VQ_RING_DESC_CHAIN_END. > - */ > - uint16_t vq_desc_head_idx; > - uint16_t vq_desc_tail_idx; > - uint16_t vq_queue_index; /**< PCI queue index */ > - uint16_t offset; /**< relative offset to obtain addr in mbuf */ > uint16_t *notify_addr; > struct rte_mbuf **sw_ring; /**< RX software ring. */ > struct vq_desc_extra vq_descx[0]; > -- > 2.29.2
diff --git a/drivers/net/virtio/virtqueue.h b/drivers/net/virtio/virtqueue.h index c64e7dcbdf..3b08aac931 100644 --- a/drivers/net/virtio/virtqueue.h +++ b/drivers/net/virtio/virtqueue.h @@ -245,6 +245,15 @@ struct virtqueue { uint16_t vq_avail_idx; /**< sync until needed */ uint16_t vq_free_thresh; /**< free threshold */ + /** + * Head of the free chain in the descriptor table. If + * there are no free descriptors, this will be set to + * VQ_RING_DESC_CHAIN_END. + */ + uint16_t vq_desc_head_idx; + uint16_t vq_desc_tail_idx; + uint16_t vq_queue_index; /**< PCI queue index */ + void *vq_ring_virt_mem; /**< linear address of vring*/ unsigned int vq_ring_size; @@ -257,15 +266,6 @@ struct virtqueue { rte_iova_t vq_ring_mem; /**< physical address of vring, * or virtual address for virtio_user. */ - /** - * Head of the free chain in the descriptor table. If - * there are no free descriptors, this will be set to - * VQ_RING_DESC_CHAIN_END. - */ - uint16_t vq_desc_head_idx; - uint16_t vq_desc_tail_idx; - uint16_t vq_queue_index; /**< PCI queue index */ - uint16_t offset; /**< relative offset to obtain addr in mbuf */ uint16_t *notify_addr; struct rte_mbuf **sw_ring; /**< RX software ring. */ struct vq_desc_extra vq_descx[0];
This patch optimizes packing of the virtuqueue struct by moving fields around to fill holes. Offset field is not used and so can be removed. Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com> --- drivers/net/virtio/virtqueue.h | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-)