#linux-rockchip on 2018-02-12 — irc logs at freenode.irclog.whitequark.org

2017-05-08 04:47 ChanServ changed the topic of #linux-rockchip to: Rockchip development discussion | IRC log http://irclog.whitequark.org/linux-rockchip | Community GH https://github.com/linux-rockchip | Rockchip GH https://github.com/rockchip-linux | ML https://groups.google.com/group/linux-rockchip

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13:56 <Myy> meow

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18:07 <Ke> https://paste.debian.net/1009942/ new version of dtc-cmp will automatically propose kernel config option

18:07 <Ke> s

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18:08 <Ke> thgouh now it requires you to compile everything as modules

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18:09 <Ke> loads of drivers missing for gru-kevin based on me just doing make oldconfig on debian sid kernel

18:10 <BenG83> anyone with a RK3399 board at hand to run a DRAM benchmark?

18:10 <Ke> on linux-4.16-rc1

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18:17 <gab> BenG83: I do

18:18 <BenG83> could you run tinymembench?

18:18 <gab> where can I find that ?

18:18 <BenG83> https://github.com/ssvb/tinymembench

18:18 <gab> ok

18:18 <JohnDoe_71Rus> does somebody work at rk3168?

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18:24 <beeble> BenG83: not sure what ram timings i have active. so with some grain of salt https://gist.github.com/anonymous/5a93ebb78081bab455b8e64f292a9581

18:25 <BenG83> hi beeble

18:25 <BenG83> does it make a difference if that runs on a little or big core?

18:26 <gab> BenG83: there it is https://pastebin.com/RYASmY0D

18:26 <BenG83> do you know what dram config you have?

18:28 <gab> I didn't modify anything about this yet

18:28 <gab> this is a sapphire board with 4GB

18:28 <BenG83> ok

18:28 <beeble> BenG83: the scheduler should have moved it to the big cluster anyway. but i will run it bound to the little

18:28 <BenG83> gab, BSP or mainline kernel?

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18:29 <gab> mainline 4.15.0-01490-g31466f3ed710

18:29 <BenG83> ok thanks

18:29 <gab> btw I'd love to know how to set my dram to get the same perfs as beeble ;)

18:29 <BenG83> your memset is for some reason pretty fast

18:30 <gab> I have glibc 2.26 from debian sid

18:30 <beeble> me too, but 4.4 kernel

18:30 <Esmil> BenG83: My Chromebook Plus is running 4.16-rc1 with fedora 27 and I'm getting quite different numbers. Hang on..

18:30 <BenG83> there could be DRAM DVFS involved too

18:31 <BenG83> not sure how to set that to ´performance´

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18:34 <beeble> BenG83: https://gist.github.com/anonymous/b99ee227d1db03f61986981b8aebfa23 just the little cluster

18:34 <Esmil> BenG83: http://ix.io/Gun

18:35 <beeble> gab: http://git.denx.de/?p=u-boot.git;a=blob;f=arch/arm/dts/rk3399-sdram-ddr3-1600.dtsi

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18:37 <BenG83> thanks

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18:46 <gab> beeble: will this dtsi work if I just use it with the kernel or do I also need to update u-boot ?

18:47 <beeble> on 4.15 i get similar numbers to gab

18:47 <gab> (huh, dumb question I guess)

18:47 <beeble> gab: i don't think it will help, seems to depend on the kernel version

18:48 <beeble> also if you are using mainline u-boot you are already running the same timings on sapphire

18:48 <gab> well, I'd better try mainline u-boot upstream instead of the rockchip-linux one

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18:48 <beeble> i think

18:49 <beeble> sorry take it back. it's using rk3399-sdram-lpddr3-4GB-1600.dtsi

18:49 <BenG83> ok

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