sorear changed the topic of #riscv to: RISC-V instruction set architecture | https://riscv.org | Logs: https://libera.irclog.whitequark.org/riscv | Matrix: #riscv:catircservices.org
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<geist> drmpeg: yep. it's not that fantastic, though it does have twice as many cores, but it's very much in the same category as the u74s
<geist> it seems to have twice the memory bandwidth FWIW
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<drmpeg> I don't understand how a Linux build make -j8 on BPI-F3 takes exactly the same time as a make -j4 on VF2.
<drmpeg> I was expecting the build to take 1/2 the time, but no.
<drmpeg> Something is very wrong.
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<Tenkawa> drmpeg: part of it is that the F3 (if the information was given to me correctly) is an OOO SoC and that being the case the build environment needs to be rebuilt/optimized to handle it..
<Tenkawa> Normal gcc/llvm if the information I have in Ubuntu/Debian does not optimize correctly to build quickly on these cpus
<Tenkawa> Do not quote me on this though...
<drmpeg> ok
<Tenkawa> Finding "detailed" information on the internals is fairly difficult for this SoC
<drmpeg> Is it possibly due to the "load average" issue?
<drmpeg> That you guys were chasing.
<Tenkawa> No.. thats fixed with the right setup...
<Tenkawa> root@bpibox:~# w
<Tenkawa> 20:36:53 up 12:57, 1 user, load average: 0.00, 0.00, 0.00
<Tenkawa> USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
<Tenkawa> thats on my curent 6.6 NVMe setup
<drmpeg> I'm still running the stock 6.6 kernel.
<Tenkawa> I think they fixed it on the latest one on the Bainbu source
<drmpeg> I'll check it out.
<Tenkawa> YpHave you updated in the last 9 days?
<Tenkawa> er Have
<Tenkawa> Thats when the latest kernel updates were
<drmpeg> I'm using whatever was in Bianbu 2.0.1
<Tenkawa> Yeah not sure..
<drmpeg> dated Oct 25.
<Tenkawa> Yeah those are the ones
<Tenkawa> Working nicely here...finally
<drmpeg> I gotta go. Time to eat.
<Tenkawa> Have fun.. I just got back from doing that
<drmpeg> to be continued...
<Tenkawa> lol
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<Esmil> dlan: which u-boot are you using on the SpacemiT K1 (banana pi)?
<Esmil> it seems the u-boot shipped with bianbu 1.0.15 just loads variables from env_k1.txt which specifies the kernel/dt to boot directly
<Esmil> eg. no possibility for a menu or u-boot prompt or even better EFI
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<jbe> Regarding the DC input on the Milk-V Jupiter, does anyone know if it's expecting e.g. minus on the shield or if the polarity even matters (i.e. it's compensated for)?
<dlan> Esmil: on bananapi-f3, I use the one refactor-ed by cyy.. I'm too lazy to build uboot myself, and only slightly adjust env_k1.txt to make it boot from tftp (using pexboot)
<Esmil> dlan: ah, do you have a link to the source?
<mps> we have u-boot on alpine patched with support for extlinux.conf and env_k1.txt is not needed
<Tenkawa> dlan: in theory ot should work.. (mps beat me to it...)
<Tenkawa> We use extlinux on our Debian/Ubuntu builder
<Tenkawa> s/ot/it
<Tenkawa> We don't use the regular u-boot/env-k1.txt anymore at all
<Tenkawa> and all boot methods work
<Tenkawa> Just u-boot/extlinux
<Tenkawa> I'm even running multiple kernels menu on mine atm to test a few performance tuning fixes
<dlan> Esmil: sorry, cyy only refactor the opensbi, for uboot, it's still vendor version, https://paste.gentoo.zip/0astSNI7
<mps> Tenkawa: right, also I do this, rescue kernel and test ones select from menu
<Tenkawa> mps: yeah that is very useful indeed...
<dlan> should support extlinux.conf fairly easy, but I haven't looked myself (as pxeboot basically parse same format as extlinux.conf)
<mps> experienced admins always have 'rescue' ready ;)
<dlan> Esmil: btw, is there anyone working on mainline support for eswin eic7700?
<Esmil> dlan: that's really a question for SiFive/ESWIN ;)
<Esmil> this is SiFive's version of the kernel mostly based on ESWIN code
<Tenkawa> Esmil: is mara on the linux kernel team or a vendor dev?
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<Esmil> im not sure who mara is
<Tenkawa> I "think" whoever that is was responsible for helping upstream some of the JH7110 Milk-V and Star64 work
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<Tenkawa> and its working very well in my testing
<Tenkawa> The Starfive had been working for a while... but not so much these units
<Tenkawa> Now the Milk-C Mars CM looks good woth one yet to be committed USB change...
<Tenkawa> er with
<Tenkawa> Shadow has been a great help there over on Matrix/Discord too
<Tenkawa> Now even my focus is this BPI-F3
<Esmil> dlan: dlan: smeul sent some patches to handle the JH7100/EIC7700 non-coherent memory better https://lore.kernel.org/all/20241102000843.1301099-1-samuel.holland@sifive.com/
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<dlan> Esmil: thanks, for all the info..
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