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Date: Mon, 26 Mar 2018 11:44:26 +0800 From: Jason Wang <jasowang@...hat.com> To: mst@...hat.com, virtualization@...ts.linux-foundation.org Cc: kvm@...r.kernel.org, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, Tiwei Bie <tiwei.bie@...el.com>, Jens Freimann <jfreimann@...hat.com>, Wei Xu <wexu@...hat.com> Subject: Re: [RFC PATCH V2 0/8] Packed ring for vhost cc Jens, Tiwei and Wei Thanks On 2018年03月26日 11:38, 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. > > 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(-) >
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