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From: "Leonidas P. Papadakos" <papadakospan@gmail.com>
To: Robin Murphy <robin.murphy@arm.com>
Cc: "Jose Abreu" <jose.abreu@synopsys.com>,
	"Alexandre Torgue" <alexandre.torgue@st.com>,
	netdev@vger.kernel.org, LKML <linux-kernel@vger.kernel.org>,
	"Christoph Müllner" <christoph.muellner@theobroma-systems.com>,
	"Klaus Goger" <klaus.goger@theobroma-systems.com>,
	"Maxime Coquelin" <mcoquelin.stm32@gmail.com>,
	"Philipp Tomsich" <philipp.tomsich@theobroma-systems.com>,
	"Linux ARM" <linux-arm-kernel@lists.infradead.org>,
	"Heiko Stübner" <heiko@sntech.de>
Subject: Re: [PATCH 1/2] stmmac: introduce flag to dynamically disable TX offload for rockchip devices
Date: Fri, 05 Apr 2019 21:38:57 +0300	[thread overview]
Message-ID: <1554489537.1199.0@gmail.com> (raw)
In-Reply-To: <85c1d945-d49b-3350-6ff4-a058c5a8c1d7@arm.com>


> What's your overall setup? So far with my RK3328 box I've found that 
> with an IPv4 link and an MTU of 2000 I have to dial PBL right down to 
> 1 or 2 (with no-pbl-x8 as well) to prevent Tx stalling, and with the 
> MTU bumped up to 3000 it just won't play at any PBL setting...
> 
> Robin.

I'm using a Libre Computer Renegade with RK3328 SoC(maybe it's a board 
specific thing?)
I'm using txpbl as from what I can gather, the rx has no issues, no 
need to change it.

When it comes to rx,
running the server (iperf3 -s) on the Renegade and iperf3 -c 
<renegade_ip> on my laptop,
I get about 940 Mbps. It's always been like that, satisfactory.

When it comes to tx (the one all the fuss is about)
I eventually find that just with snps,txpbl = <0x21>, and no other pbl 
thing set I get about 905 Mbps on average sent to my laptop, now 
running the iperf3 server.

I must say I haven't touched the MTUs but I never needed to as the 
issue presented itself in normal usage. Simple iperf tests will fail 
after same kilobytes if no tweaks are applied.



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WARNING: multiple messages have this Message-ID (diff)
From: "Leonidas P. Papadakos" <papadakospan@gmail.com>
To: Robin Murphy <robin.murphy@arm.com>
Cc: "Jose Abreu" <jose.abreu@synopsys.com>,
	"Philipp Tomsich" <philipp.tomsich@theobroma-systems.com>,
	"Heiko Stübner" <heiko@sntech.de>,
	"Christoph Müllner" <christoph.muellner@theobroma-systems.com>,
	"Maxime Coquelin" <mcoquelin.stm32@gmail.com>,
	"Alexandre Torgue" <alexandre.torgue@st.com>,
	netdev@vger.kernel.org, LKML <linux-kernel@vger.kernel.org>,
	"Linux ARM" <linux-arm-kernel@lists.infradead.org>,
	"Klaus Goger" <klaus.goger@theobroma-systems.com>
Subject: Re: [PATCH 1/2] stmmac: introduce flag to dynamically disable TX offload for rockchip devices
Date: Fri, 05 Apr 2019 21:38:57 +0300	[thread overview]
Message-ID: <1554489537.1199.0@gmail.com> (raw)
In-Reply-To: <85c1d945-d49b-3350-6ff4-a058c5a8c1d7@arm.com>


> What's your overall setup? So far with my RK3328 box I've found that 
> with an IPv4 link and an MTU of 2000 I have to dial PBL right down to 
> 1 or 2 (with no-pbl-x8 as well) to prevent Tx stalling, and with the 
> MTU bumped up to 3000 it just won't play at any PBL setting...
> 
> Robin.

I'm using a Libre Computer Renegade with RK3328 SoC(maybe it's a board 
specific thing?)
I'm using txpbl as from what I can gather, the rx has no issues, no 
need to change it.

When it comes to rx,
running the server (iperf3 -s) on the Renegade and iperf3 -c 
<renegade_ip> on my laptop,
I get about 940 Mbps. It's always been like that, satisfactory.

When it comes to tx (the one all the fuss is about)
I eventually find that just with snps,txpbl = <0x21>, and no other pbl 
thing set I get about 905 Mbps on average sent to my laptop, now 
running the iperf3 server.

I must say I haven't touched the MTUs but I never needed to as the 
issue presented itself in normal usage. Simple iperf tests will fail 
after same kilobytes if no tweaks are applied.



  reply	other threads:[~2019-04-05 18:39 UTC|newest]

Thread overview: 54+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-01 18:18 [PATCH 1/2] stmmac: introduce flag to dynamically disable TX offload for rockchip devices Leonidas P. Papadakos
2019-04-01 18:18 ` Leonidas P. Papadakos
2019-04-01 18:31 ` Heiko Stübner
2019-04-01 18:31   ` Heiko Stübner
2019-04-01 18:54 ` Robin Murphy
2019-04-01 18:54   ` Robin Murphy
2019-04-01 19:06   ` Heiko Stübner
2019-04-01 19:06     ` Heiko Stübner
2019-04-01 19:12     ` Philipp Tomsich
2019-04-01 19:12       ` Philipp Tomsich
2019-04-02  7:59       ` Jose Abreu
2019-04-02  7:59         ` Jose Abreu
2019-04-02 11:49         ` Robin Murphy
2019-04-02 11:49           ` Robin Murphy
2019-04-02 11:53           ` Jose Abreu
2019-04-02 11:53             ` Jose Abreu
2019-04-02 22:08             ` Robin Murphy
2019-04-02 22:08               ` Robin Murphy
2019-04-02 22:48               ` Leonidas P. Papadakos
2019-04-02 22:48                 ` Leonidas P. Papadakos
2019-04-03  7:55                 ` Jose Abreu
2019-04-03  7:55                   ` Jose Abreu
2019-04-03 15:35                   ` Leonidas P. Papadakos
2019-04-03 15:35                     ` Leonidas P. Papadakos
2019-04-03 15:55                     ` Leonidas P. Papadakos
2019-04-03 15:55                       ` Leonidas P. Papadakos
2019-04-03 16:12                       ` Robin Murphy
2019-04-03 16:12                         ` Robin Murphy
2019-04-05 10:24                         ` Jose Abreu
2019-04-05 10:24                           ` Jose Abreu
2019-04-05 17:58                           ` Leonidas P. Papadakos
2019-04-05 17:58                             ` Leonidas P. Papadakos
2019-04-05 18:14                           ` Leonidas P. Papadakos
2019-04-05 18:14                             ` Leonidas P. Papadakos
2019-04-05 18:29                             ` Robin Murphy
2019-04-05 18:29                               ` Robin Murphy
2019-04-05 18:38                               ` Leonidas P. Papadakos [this message]
2019-04-05 18:38                                 ` Leonidas P. Papadakos
2019-04-11 21:09                                 ` Leonidas P. Papadakos
2019-04-11 21:09                                   ` Leonidas P. Papadakos
2019-04-12  7:35                                   ` Jose Abreu
2019-04-12  7:35                                     ` Jose Abreu
2019-04-12 11:13                                     ` Leonidas P. Papadakos
2019-04-12 11:13                                       ` Leonidas P. Papadakos
2019-04-15  8:15                                       ` Jose Abreu
2019-04-15  8:15                                         ` Jose Abreu
2019-04-15 21:45                                         ` Leonidas P. Papadakos
2019-04-15 21:45                                           ` Leonidas P. Papadakos
2019-04-15 22:19                                           ` Leonidas P. Papadakos
2019-04-15 22:19                                             ` Leonidas P. Papadakos
2019-04-16  8:01                                             ` Jose Abreu
2019-04-16  8:01                                               ` Jose Abreu
2019-04-16 10:03                                               ` Leonidas P. Papadakos
2019-04-16 10:03                                                 ` Leonidas P. Papadakos

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