netdev - Re: [RFC PATCH net-next v8 13/14] net: add devmem TCP documentation

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Message-ID: <ZjTjG_INUM4G1Pf5@archie.me>
Date: Fri, 3 May 2024 20:14:03 +0700
From: Bagas Sanjaya <bagasdotme@...il.com>
To: Mina Almasry <almasrymina@...gle.com>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
	linux-alpha@...r.kernel.org, linux-mips@...r.kernel.org,
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	bpf@...r.kernel.org, linux-kselftest@...r.kernel.org,
	linux-media@...r.kernel.org, dri-devel@...ts.freedesktop.org
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	Eric Dumazet <edumazet@...gle.com>,
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Subject: Re: [RFC PATCH net-next v8 13/14] net: add devmem TCP documentation

On Tue, Apr 02, 2024 at 05:20:50PM -0700, Mina Almasry wrote:
> +ncdevmem has a validation mode as well that expects a repeating pattern of
> +incoming data and validates it as such::
> +
> +	# On server:
> +	ncdevmem -s <server IP> -c <client IP> -f eth1 -d 3 -n 0000:06:00.0 -l \
> +		 -p 5201 -v 7
> +
> +	# On client:
> +	yes $(echo -e \\x01\\x02\\x03\\x04\\x05\\x06) | \
> +		tr \\n \\0 | head -c 5G | nc <server IP> 5201 -p 5201

What about splitting server and client usage?

---- >8 ----
diff --git a/Documentation/networking/devmem.rst b/Documentation/networking/devmem.rst
index e4e978fbcdbd5f..f32acfd62075d2 100644
--- a/Documentation/networking/devmem.rst
+++ b/Documentation/networking/devmem.rst
@@ -245,12 +245,14 @@ To run ncdevmem, you need to run it on a server on the machine under test, and
 you need to run netcat on a peer to provide the TX data.
 
 ncdevmem has a validation mode as well that expects a repeating pattern of
-incoming data and validates it as such::
+incoming data and validates it as such. For example, you can launch
+ncdevmem on the server by::
 
-	# On server:
 	ncdevmem -s <server IP> -c <client IP> -f eth1 -d 3 -n 0000:06:00.0 -l \
 		 -p 5201 -v 7
 
-	# On client:
+On client side, use regular netcat to send TX data to ncdevmem process
+on the server::
+
 	yes $(echo -e \\x01\\x02\\x03\\x04\\x05\\x06) | \
 		tr \\n \\0 | head -c 5G | nc <server IP> 5201 -p 5201

Thanks.

-- 
An old man doll... just what I always wanted! - Clara

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