linux-kernel - Re: [PATCH RFC net-next v2 0/3] vsock: add support for sockmap

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Date:   Fri, 3 Feb 2023 05:30:07 +0000
From:   Bobby Eshleman <bobbyeshleman@...il.com>
To:     Cong Wang <xiyou.wangcong@...il.com>
Cc:     Bobby Eshleman <bobby.eshleman@...edance.com>,
        Stefan Hajnoczi <stefanha@...hat.com>,
        Stefano Garzarella <sgarzare@...hat.com>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Andrii Nakryiko <andrii@...nel.org>,
        Mykola Lysenko <mykolal@...com>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Martin KaFai Lau <martin.lau@...ux.dev>,
        Song Liu <song@...nel.org>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>,
        Stanislav Fomichev <sdf@...gle.com>,
        Hao Luo <haoluo@...gle.com>, Jiri Olsa <jolsa@...nel.org>,
        Shuah Khan <shuah@...nel.org>, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org, virtualization@...ts.linux-foundation.org,
        netdev@...r.kernel.org, bpf@...r.kernel.org,
        linux-kselftest@...r.kernel.org, jakub@...udflare.com,
        hdanton@...a.com, cong.wang@...edance.com
Subject: Re: [PATCH RFC net-next v2 0/3] vsock: add support for sockmap

On Sun, Feb 05, 2023 at 12:08:49PM -0800, Cong Wang wrote:
> On Mon, Jan 30, 2023 at 08:35:11PM -0800, Bobby Eshleman wrote:
> > Add support for sockmap to vsock.
> > 
> > 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.
> > 
> 
> Looks good to me. Definitely good to go as non-RFC.
> 
> Thanks.

Thank you for the review.

Best,
Bobby