Are there still plans to test the performance with vost pmd? vhost doesn't seem to show a performance gain ... On Wed, Jul 11, 2018 at 10:27:06AM +0800, Tiwei Bie wrote: > Hello everyone, > > This patch set implements packed ring support in virtio driver. > > Some functional tests have been done with Jason's > packed ring implementation in vhost: > > https://lkml.org/lkml/2018/7/3/33 > > Both of ping and netperf worked as expected. > > v1 -> v2: > - Use READ_ONCE() to read event off_wrap and flags together (Jason); > - Add comments related to ccw (Jason); > > RFC (v6) -> v1: > - Avoid extra virtio_wmb() in virtqueue_enable_cb_delayed_packed() > when event idx is off (Jason); > - Fix bufs calculation in virtqueue_enable_cb_delayed_packed() (Jason); > - Test the state of the desc at used_idx instead of last_used_idx > in virtqueue_enable_cb_delayed_packed() (Jason); > - Save wrap counter (as part of queue state) in the return value > of virtqueue_enable_cb_prepare_packed(); > - Refine the packed ring definitions in uapi; > - Rebase on the net-next tree; > > RFC v5 -> RFC v6: > - Avoid tracking addr/len/flags when DMA API isn't used (MST/Jason); > - Define wrap counter as bool (Jason); > - Use ALIGN() in vring_init_packed() (Jason); > - Avoid using pointer to track `next` in detach_buf_packed() (Jason); > - Add comments for barriers (Jason); > - Don't enable RING_PACKED on ccw for now (noticed by Jason); > - Refine the memory barrier in virtqueue_poll(); > - Add a missing memory barrier in virtqueue_enable_cb_delayed_packed(); > - Remove the hacks in virtqueue_enable_cb_prepare_packed(); > > RFC v4 -> RFC v5: > - Save DMA addr, etc in desc state (Jason); > - Track used wrap counter; > > RFC v3 -> RFC v4: > - Make ID allocation support out-of-order (Jason); > - Various fixes for EVENT_IDX support; > > RFC v2 -> RFC v3: > - Split into small patches (Jason); > - Add helper virtqueue_use_indirect() (Jason); > - Just set id for the last descriptor of a list (Jason); > - Calculate the prev in virtqueue_add_packed() (Jason); > - Fix/improve desc suppression code (Jason/MST); > - Refine the code layout for XXX_split/packed and wrappers (MST); > - Fix the comments and API in uapi (MST); > - Remove the BUG_ON() for indirect (Jason); > - Some other refinements and bug fixes; > > RFC v1 -> RFC v2: > - Add indirect descriptor support - compile test only; > - Add event suppression supprt - compile test only; > - Move vring_packed_init() out of uapi (Jason, MST); > - Merge two loops into one in virtqueue_add_packed() (Jason); > - Split vring_unmap_one() for packed ring and split ring (Jason); > - Avoid using '%' operator (Jason); > - Rename free_head -> next_avail_idx (Jason); > - Add comments for virtio_wmb() in virtqueue_add_packed() (Jason); > - Some other refinements and bug fixes; > > Thanks! > > Tiwei Bie (5): > virtio: add packed ring definitions > virtio_ring: support creating packed ring > virtio_ring: add packed ring support > virtio_ring: add event idx support in packed ring > virtio_ring: enable packed ring > > drivers/s390/virtio/virtio_ccw.c | 14 + > drivers/virtio/virtio_ring.c | 1365 ++++++++++++++++++++++------ > include/linux/virtio_ring.h | 8 +- > include/uapi/linux/virtio_config.h | 3 + > include/uapi/linux/virtio_ring.h | 43 + > 5 files changed, 1157 insertions(+), 276 deletions(-) > > -- > 2.18.0 _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
