lkml.org 
[lkml]   [2018]   [Mar]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [RFC PATCH V2 0/8] Packed ring for vhost
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
>

\
 
 \ /
  Last update: 2018-03-26 21:03    [W:0.076 / U:2.104 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site