linux-kernel - Re: [PATCH net-next v3 2/6] selftests: ncdevmem: Implement devmem TCP TX

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Message-ID: <Z6JXaz1AwMhN1wvL@mini-arch>
Date: Tue, 4 Feb 2025 10:07:39 -0800
From: Stanislav Fomichev <stfomichev@...il.com>
To: Mina Almasry <almasrymina@...gle.com>
Cc: Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
	kvm@...r.kernel.org, virtualization@...ts.linux.dev,
	linux-kselftest@...r.kernel.org,
	Donald Hunter <donald.hunter@...il.com>,
	Jakub Kicinski <kuba@...nel.org>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>, Simon Horman <horms@...nel.org>,
	Jonathan Corbet <corbet@....net>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	Neal Cardwell <ncardwell@...gle.com>,
	David Ahern <dsahern@...nel.org>,
	"Michael S. Tsirkin" <mst@...hat.com>,
	Jason Wang <jasowang@...hat.com>,
	Xuan Zhuo <xuanzhuo@...ux.alibaba.com>,
	Eugenio Pérez <eperezma@...hat.com>,
	Stefan Hajnoczi <stefanha@...hat.com>,
	Stefano Garzarella <sgarzare@...hat.com>,
	Shuah Khan <shuah@...nel.org>, sdf@...ichev.me,
	asml.silence@...il.com, dw@...idwei.uk,
	Jamal Hadi Salim <jhs@...atatu.com>,
	Victor Nogueira <victor@...atatu.com>,
	Pedro Tammela <pctammela@...atatu.com>,
	Samiullah Khawaja <skhawaja@...gle.com>
Subject: Re: [PATCH net-next v3 2/6] selftests: ncdevmem: Implement devmem
 TCP TX

On 02/04, Mina Almasry wrote:
> On Tue, Feb 4, 2025 at 9:56 AM Paolo Abeni <pabeni@...hat.com> wrote:
> >
> > On 2/4/25 6:35 PM, Mina Almasry wrote:
> > > On Tue, Feb 4, 2025 at 4:29 AM Paolo Abeni <pabeni@...hat.com> wrote:
> > >>>  .../selftests/drivers/net/hw/ncdevmem.c       | 300 +++++++++++++++++-
> > >>>  1 file changed, 289 insertions(+), 11 deletions(-)
> > >>
> > >> Why devmem.py is not touched? AFAICS the test currently run ncdevmem
> > >> only in server (rx) mode, so the tx path is not actually exercised ?!?
> > >>
> > >
> > > Yeah, to be honest I have a collection of local bash scripts that
> > > invoke ncdevmem in different ways for my testing, and I have docs on
> > > top of ncdevmem.c of how to test; I don't use devmem.py. I was going
> > > to look at adding test cases to devmem.py as a follow up, if it's OK
> > > with you, and Stan offered as well on an earlier revision. If not no
> > > problem, I can address in this series. The only issue is that I have
> > > some legwork to enable devmem.py on my test setup/distro, but the meat
> > > of the tests is already included and passing in this series (when
> > > invoked manually).
> >
> > I think it would be better if you could include at least a very basic
> > test-case for the TX path. More accurate coverage could be a follow-up.
> >
> 
> Thanks; will do.

This is what I've been using to test tx-only and tx-rx modes (shared
previously on the list as well):
https://github.com/fomichev/linux/commit/df5ef094db57f6c49603e6be5730782e379dd237

Feel free to include in the v4.