linux-kernel - Re: [PATCH v3 1/1] gro: decrease size of CB

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Message-ID: <90a27f82-ff90-f8ce-ccf3-e1d8909b744d@kernel.org>
Date:   Wed, 23 Aug 2023 20:31:21 -0700
From:   David Ahern <dsahern@...nel.org>
To:     Gal Pressman <gal@...dia.com>,
        Richard Gobert <richardbgobert@...il.com>, davem@...emloft.net,
        edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
        aleksander.lobakin@...el.com, lixiaoyan@...gle.com,
        lucien.xin@...il.com, alexanderduyck@...com,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 1/1] gro: decrease size of CB

On 8/23/23 7:43 AM, Gal Pressman wrote:
>> With veth and namespaces I expect up to 25-30G performance levels,
>> depending on the test. When something fundamental breaks like this patch
>> a drop to < 1G would be a red flag, so there is value to the test.
> Circling back to this, I believe such test already exists:
> tools/testing/selftests/net/udpgro_fwd.sh
> 
> And it indeed fails before Richard's fix.
> 
> I guess all that's left is to actually run these tests 😄?

hmmm... if that is the case, the Makefile shows:

TEST_PROGS += udpgro_fwd.sh

so it should be run. I wonder why one of the many bots did not flag it.