Re: [PATCH net-next v4 0/3] Add support for sockmap to vsock.

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On Fri, Mar 31, 2023 at 06:06:10PM -0700, John Fastabend wrote:
Bobby Eshleman wrote:
We're testing usage of vsock as a way to redirect guest-local UDS
requests to the host and this patch series greatly improves the
performance of such a setup.

Compared to copying packets via userspace, this improves throughput by
121% in basic testing.

Tested as follows.

Setup: guest unix dgram sender -> guest vsock redirector -> host vsock
       server
Threads: 1
Payload: 64k
No sockmap:
- 76.3 MB/s
- The guest vsock redirector was
  "socat VSOCK-CONNECT:2:1234 UNIX-RECV:/path/to/sock"
Using sockmap (this patch):
- 168.8 MB/s (+121%)
- The guest redirector was a simple sockmap echo server,
  redirecting unix ingress to vsock 2:1234 egress.
- Same sender and server programs

*Note: these numbers are from RFC v1

Only the virtio transport has been tested. The loopback transport was
used in writing bpf/selftests, but not thoroughly tested otherwise.

This series requires the skb patch.

Appears reasonable to me although I didn't review internals of all
the af_vsock stuff. I see it got merged great.

Thanks for checking!


One nit, I have a series coming shortly to pull the tests out of
the sockmap_listen and into a sockmap_vsock because I don't think they
belong in _listen but that is just a refactor.


LGTM!

Thanks,
Stefano




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