On Mon, Mar 26, 2018 at 11:38:45AM +0800, Jason Wang wrote: > Hi all: > > This RFC implement packed ring layout. The code were tested with pmd > implement by Jens at > http://dpdk.org/ml/archives/dev/2018-January/089417.html. Minor change > was needed for pmd codes to kick virtqueue since it assumes a busy > polling backend. > > Test were done between localhost and guest. Testpmd (rxonly) in guest > reports 2.4Mpps. Testpmd (txonly) repots about 2.1Mpps. And how does it compare to older ring layout? > > Notes: The event suppression /indirect descriptor support is complied > test only because of lacked driver support. > > Changes from V1: > > - Refactor vhost used elem code to avoid open coding on used elem > - Event suppression support (compile test only). > - Indirect descriptor support (compile test only). > - Zerocopy support. > - vIOMMU support. > - SCSI/VSOCK support (compile test only). > - Fix several bugs > > For simplicity, I don't implement batching or other optimizations. > > Please review. > > Thanks > > Jason Wang (8): > vhost: move get_rx_bufs to vhost.c > vhost: hide used ring layout from device > vhost: do not use vring_used_elem > vhost_net: do not explicitly manipulate vhost_used_elem > vhost: vhost_put_user() can accept metadata type > virtio: introduce packed ring defines > vhost: packed ring support > vhost: event suppression for packed ring > > drivers/vhost/net.c | 138 ++----- > drivers/vhost/scsi.c | 62 +-- > drivers/vhost/vhost.c | 818 ++++++++++++++++++++++++++++++++++--- > drivers/vhost/vhost.h | 46 ++- > drivers/vhost/vsock.c | 42 +- > include/uapi/linux/virtio_config.h | 9 + > include/uapi/linux/virtio_ring.h | 32 ++ > 7 files changed, 921 insertions(+), 226 deletions(-) > > -- > 2.7.4 >
