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Date:   Mon, 3 Apr 2023 13:10:14 +0200
From:   Stefano Garzarella <sgarzare@redhat.com>
To:     John Fastabend <john.fastabend@gmail.com>
Cc:     Bobby Eshleman <bobby.eshleman@bytedance.com>,
        Stefan Hajnoczi <stefanha@redhat.com>,
        "Michael S. Tsirkin" <mst@redhat.com>,
        Jason Wang <jasowang@redhat.com>,
        "David S. Miller" <davem@davemloft.net>,
        Eric Dumazet <edumazet@google.com>,
        Jakub Kicinski <kuba@kernel.org>,
        Paolo Abeni <pabeni@redhat.com>,
        Andrii Nakryiko <andrii@kernel.org>,
        Mykola Lysenko <mykolal@fb.com>,
        Alexei Starovoitov <ast@kernel.org>,
        Daniel Borkmann <daniel@iogearbox.net>,
        Martin KaFai Lau <martin.lau@linux.dev>,
        Song Liu <song@kernel.org>, Yonghong Song <yhs@fb.com>,
        KP Singh <kpsingh@kernel.org>,
        Stanislav Fomichev <sdf@google.com>,
        Hao Luo <haoluo@google.com>, Jiri Olsa <jolsa@kernel.org>,
        Shuah Khan <shuah@kernel.org>, linux-kernel@vger.kernel.org,
        kvm@vger.kernel.org, virtualization@lists.linux-foundation.org,
        netdev@vger.kernel.org, bpf@vger.kernel.org,
        linux-kselftest@vger.kernel.org
Subject: Re: [PATCH net-next v4 0/3] Add support for sockmap to vsock.
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References: <20230327-vsock-sockmap-v4-0-c62b7cd92a85@bytedance.com>
 <6427838247d16_c503a2087e@john.notmuch>
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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