Re: [PATCH v3 0/4] Add vhost-user support to passt. (part 3)

On Wed, 21 Aug 2024 00:41:14 +0200
Stefano Brivio <sbrivio(a)redhat.com> wrote:

...
  On Thu, 15 Aug 2024 17:50:19 +0200
 Laurent Vivier <lvivier(a)redhat.com> wrote:
 
  This series of patches adds vhost-user support to
passt
 and then allows passt to connect to QEMU network backend using
 virtqueue rather than a socket.
 
 With QEMU, rather than using to connect:
 
   -netdev stream,id=s,server=off,addr.type=unix,addr.path=/tmp/passt_1.socket
 
 we will use:
 
   -chardev socket,id=chr0,path=/tmp/passt_1.socket
   -netdev vhost-user,id=netdev0,chardev=chr0
   -device virtio-net,netdev=netdev0
   -object memory-backend-memfd,id=memfd0,share=on,size=$RAMSIZE
   -numa node,memdev=memfd0
 
 The memory backend is needed to share data between passt and QEMU.
 
 Performance comparison between "-netdev stream" and "-netdev
vhost-user":   
 
 By the way, I attached a quick patch adding vhost-user-based tests to
 the usual throughput and latency tests.
 
 UDP doesn't work (I didn't look into that at all), TCP does. 
Complete/fixed patch attached. The only part of UDP that's not working
is actually over IPv6 -- it works over IPv4.

-- 
Stefano