Messages in this thread | | | Date | Fri, 05 Apr 2019 21:38:57 +0300 | From | "Leonidas P. Papadakos" <> | Subject | Re: [PATCH 1/2] stmmac: introduce flag to dynamically disable TX offload for rockchip devices |
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> 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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