netdev - Re: [RFC PATCH v2 10/10] selftests: add functionals test for UDP GRO

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Date:   Sun, 21 Oct 2018 16:09:41 -0400
From:   Willem de Bruijn <willemdebruijn.kernel@...il.com>
To:     Paolo Abeni <pabeni@...hat.com>
Cc:     Network Development <netdev@...r.kernel.org>,
        Willem de Bruijn <willemb@...gle.com>,
        steffen.klassert@...unet.com
Subject: Re: [RFC PATCH v2 10/10] selftests: add functionals test for UDP GRO

On Fri, Oct 19, 2018 at 10:31 AM Paolo Abeni <pabeni@...hat.com> wrote:
>
> Extends the existing udp programs to allow checking for proper
> GRO aggregation/GSO size, and run the tests via a shell script, using
> a veth pair with XDP program attached to trigger the GRO code path.
>
> Signed-off-by: Paolo Abeni <pabeni@...hat.com>
> ---
>  tools/testing/selftests/net/Makefile          |   2 +-
>  tools/testing/selftests/net/udpgro.sh         | 144 ++++++++++++++++++
>  tools/testing/selftests/net/udpgro_bench.sh   |   8 +-
>  tools/testing/selftests/net/udpgso_bench.sh   |   2 +-
>  tools/testing/selftests/net/udpgso_bench_rx.c | 125 +++++++++++++--
>  tools/testing/selftests/net/udpgso_bench_tx.c |  22 ++-
>  6 files changed, 281 insertions(+), 22 deletions(-)
>  create mode 100755 tools/testing/selftests/net/udpgro.sh
>

> diff --git a/tools/testing/selftests/net/udpgro.sh b/tools/testing/selftests/net/udpgro.sh

> +       run_test "no GRO chk cmsg" "${ipv4_args} -M 10 -s 1400" "-4 -n 10 -l 1400 -S -1"
> +       run_test "no GRO chk cmsg" "${ipv6_args} -M 10 -s 1400" "-n 10 -l 1400 -S -1"

why expected segment size -1 in these two?

> diff --git a/tools/testing/selftests/net/udpgso_bench_tx.c b/tools/testing/selftests/net/udpgso_bench_tx.c
>  static void usage(const char *filepath)
>  {
> -       error(1, 0, "Usage: %s [-46cmStuz] [-C cpu] [-D dst ip] [-l secs] [-p port] [-s sendsize]",
> +       error(1, 0, "Usage: %s [-46cmtuz] [-C cpu] [-D dst ip] [-l secs] [-m messagenr] [-p port] [-s sendsize] [-S gsosize]",
>                     filepath);

missing -M