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| qschulz | agodard: there's something odd with your "Applied, thanks" workflow. It's sent to multiple versions of the same patchset. | 08:43 |
|---|---|---|
| qschulz | agodard: c.f. https://lore.kernel.org/yocto-docs/178272012312.45179.11589027456533465928.b4-ty@b4/ | 08:43 |
| qschulz | and https://lore.kernel.org/yocto-docs/178272012309.45179.10854169177577629766.b4-ty@b4/ | 08:43 |
| qschulz | it';s not the only one, it also happened to some patch from Robert IIRC | 08:43 |
| agodard | qschulz: eh, my bad, I don't know what's up with b4 lately but it has already happened. not sure why... | 08:43 |
| qschulz | agodard: did you maybe apply locally an earlier version and then reverted it and apply a later version? | 08:45 |
| agodard | qschulz: maybe. but that has happened before, usually b4 does not send thank you notes for unapplied patches | 08:47 |
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| pi5 | hi everyone, i am working on a project with raspberry pi 5 and yocto. What would be the best performing microsd to pick for this between sandisk, samsung pro and official raspberry pi 5 micro sd and how much memory would be necessary. is 32 enough? | 09:13 |
| pi5 | thanks in advance :) | 09:14 |
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| qschulz | pi5: there's no easy answer to that question. First for the size, it depends what kind of image you want to put on it, how much temporary or permanent files you want to store on it, so this is a question you only can answer | 09:33 |
| qschulz | for the performance, it depends how far you want to compare cards and what kind of reads or writes you are going to do on it | 09:34 |
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| qschulz | sequential/random read/write performance differs wildly between "similarly" spec'ed SD cards, so you need to know what you are building and what kind of operations you would be doing on the SD card (possibly tweak the FS filesystem 'm assuming?) | 09:35 |
| pi5 | the image should be minimal, no systemd bloat. i'd like to transition this to embedded. this is only for poc | 09:36 |
| qschulz | people have different ideas of what minimal means, and you can spend a great deal of time optimizing the size of a system :) | 09:36 |
| qschulz | the SD controller supports SDR104 according to the Linux kernel device tree | 09:38 |
| qschulz | so according to https://www.sdcard.org/developers/sd-standard-overview/bus-speed-default-speed-high-speed-uhs-sd-express/, it means UHS-I max | 09:38 |
| qschulz | so you can skip any other faster bus interface as the controller won't be able to make use of it | 09:39 |
| pi5 | the most common writes to the microsd would be the localized blockchain, so Local block headers, transaction data, state trie updates, and consensus messages every 1 to 5 seconds. not as many reads, it would more write intense | 09:40 |
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| qschulz | you'd need to do research on what kind of writes those are (sequential/read) possibly based on the choice of filesystem, I don't have knowledge in that sorry | 09:41 |
| qschulz | but it write speed is the main driver of your product, you probably don't want to be using SD cards? | 09:42 |
| rburton | for a proof of concept, whatever decent SD you can find. for something in production, not a SD. | 09:43 |
| marex | rburton: that, +1 | 09:44 |
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| pi5 | the blockchain writes are non-sequential. that is probably the tricky part. | 09:44 |
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| qschulz | rburton: walter: we'll likely need to tackle the building with llvm in mesa on big.LITTLE architectures quite "soon" as mesa is moving Rockchip (panfrost) compiler to Rust (KRAID), see https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/41841#merging-and-development-plan | 09:47 |
| rburton | fun! | 09:47 |
| qschulz | https://www.collabora.com/news-and-blog/news-and-events/kraid-a-new-compiler-for-panfrost.html | 09:49 |
| qschulz | that's what I wanted to link to | 09:49 |
| qschulz | "This allows us to continue developing upstream without disturbing our users." | 09:49 |
| qschulz | "Some of our customers are using very bespoke Linux distros and may not have Rust incorporated into their build systems yet. This buys them some time and allows them to continue building without Rust for the time being." | 09:49 |
| qschulz | "If things continue to go well, we will hopefully be able to switch over sometime next year." | 09:50 |
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| pi5 | rburton so you would advise against using microsd for embedded phase? | 10:03 |
| pi5 | would eMMC be a better choice? | 10:04 |
| rburton | entirely depends on price/deployment/etc. you can get industrial SD cards that are more resiliant. | 10:04 |
| pi5 | the idea is to replace the raspberry pi 5 with STM32H7 / NXP | 10:07 |
| pi5 | i.MX RT during the embedded phase so i am curious if i can have a memory solution that works for both phases so i don't need to make any changes | 10:07 |
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| walter | qschulz: about that. since sending that patch I came across this comment: https://github.com/gcc-mirror/gcc/blob/master/gcc/config/aarch64/aarch64.cc#L20198-L20200 | 12:45 |
| walter | So, I'm thinking that maybe we should also remove -mtune and -march when sending things to bindgen. | 12:46 |
| walter | and maybe even remove -mcpu from gcc and keep only -mtune and -march. | 12:48 |
| walter | cc: rburton | 12:48 |
| rburton | the general cpu/arch/tune flags debate is long and complicated | 12:50 |
| rburton | that comment is a good rationale for removing -mcpu though | 12:50 |
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| walter | Oh, and I've got some more bookmarks, It seems that the target triple is required for bindgen, otherwise it falls back to the host target. | 13:45 |
| walter | https://github.com/rust-lang/rust-bindgen/blob/main/bindgen/lib.rs#L721 | 13:45 |
| walter | And there's also this: https://github.com/rust-lang/rust-bindgen/commit/e3a6b8cd2b32a0cefbfc62c7bf14aee74f5d722a | 13:46 |
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| walter | Oh, and if you want to know if big.LITTLE "support" was attempted, we have this lovely part in the commit message here "For now, big.LITTLE configurations are treated as the little core" https://reviews.llvm.org/D32076 | 13:55 |
| walter | and that seems to be it. not much else on big.LITTLE and llvm. | 13:55 |
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| walter | Actually, there's also this: https://github.com/llvm/llvm-project/pull/146515/changes | 13:57 |
| walter | and that is it. nothing else | 13:59 |
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| tepperson | im seeing on i586 with the openssl 3.5.6 recipe (scarthgap): im unable to do any file operations, openssl complains that there are no store loaders, for example `touch /tmp/asdf && openssl storeutl file:/tmp/asdf` | 14:03 |
| paulbarker | tepperson: Do you know if that is a regression? | 14:05 |
| tepperson | paulbarker: not sure, first time i've run openssl on this configuration | 14:06 |
| paulbarker | tepperson: Ok, I don't have any reason to suspect it, but good to check | 14:06 |
| pi5 | i was considering using ATECC608B but on https://www.microchip.com/en-us/product/atecc608b#product-purchase i see it's not recommended for new designs. What's an alternative to it? I see ATECC608B-MAHCZ-S, ATECC608B-MAHDA-T etc but i don't understand what's the difference between them. | 14:07 |
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| tepperson | ill test on scarthgap poky with openssl 3.5.5 | 14:16 |
| tepperson | pi5: generally pinout and package is the difference between them | 14:17 |
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| pi5 | tepperson how do i identify the one i need for my project? when i click purchase it shows list of parts with different package type: ATECC608B-MAVDA-S, ATECC608B-RBHCZ-B etc or would any of these work fine? | 14:19 |
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| walter | Maybe I should put this in a mail somewhere. But I've noticed that there's another possible fix for big.LITTLE, see `enum aarch64_cpu` in here, just the little cores exist for all big.LITTLE definitions: | 14:24 |
| walter | https://github.com/gcc-mirror/gcc/blob/master/gcc/config/aarch64/aarch64-opts.h#L40 | 14:24 |
| walter | https://github.com/gcc-mirror/gcc/blob/master/gcc/config/aarch64/aarch64-cores.def#L24 | 14:24 |
| walter | ^^: rburton, qschulz | 14:24 |
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| walter | And you can see the `-mcpu` validation is here: https://github.com/gcc-mirror/gcc/blob/master/gcc/common/config/aarch64/aarch64-common.cc#L557 | 14:29 |
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| walter | (and if you read where the validation function is used, you'll see a comment mentioning the right-most value) | 14:36 |
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| walter | Instead of that patch that is in master-next, should I maybe send one that replicates the `aarch64_rewrite_mcpu` behavior from there? | 14:40 |
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| walter | nice comment: We are going to memory leak here, nobody elsewhere in the callchain is going to clean up after us. | 14:43 |
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| RP | mathieudb: we need to drop the bindgen patch as per the above ^^^ | 14:45 |
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| yannd | it seems fetching from git.openembedded.org is broken, port 9418 is not responding | 14:47 |
| RP | yannd: git protocol or https? You should use https | 14:48 |
| yannd | using git protocol | 14:48 |
| RP | it's deprecated and we can't keep it running with all the bots using the servers :( | 14:49 |
| RP | use https | 14:49 |
| yannd | ok, but I guess quite a few other setups will cease to work until they switch | 14:50 |
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| RP | yannd: it hasn't been enabled much for a while, we've been trying to publise the fact in the weekly status reports, calls etc, but there is only so much we can do | 14:52 |
| yannd | yeah, I should really try to keep uptodate, it seems :| | 14:53 |
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| rburton | yannd: yocto-status mailing list is your friend, once a week mail | 15:00 |
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| walter | I'll prepare a new bindgen patch for tomorrow, but please review it carefully, the marcros to get from gcc.cc to aarch64_rewrite_mcpu are all over the place, it's crazy complicated. And I'm not sure if that argv is actually equivalent to the python `mcpu.split('.')` or is just an array of mcpu arguments. But I'll mention this in the mail. | 15:05 |
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| * walter looks into the code and see what's actually there. | 15:14 | |
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| walter | s/and/to/ :) | 15:33 |
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| tepperson | i justed openssl 3.5.5 and 3.5.6 on i586 and they both have the same error. no store loader found | 15:50 |
| tepperson | s/justed/just_tested/ | 15:52 |
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| neachdainn | What is considered "best practice" for small compiled utilities? It seems wrong to put the source and full build meta-data in `${THISDIR}/files" but it also seems really, really heavy to make a new Git repo for a ~50 line C file. | 16:45 |
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| walter | Question, is there a reason why we don't use the GCC metadata to generate the base files for `meta/conf/machine/include`? | 16:48 |
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| rburton | walter: i suspect something along the lines of just because gcc supports it doesn't make it sensible or desired, but machine-generating the base would be good imho. patches welcome? | 17:09 |
| walter | I'll look into that, as soon as I figure out how to fix bindgen. I'm now looking into libclang code. | 17:11 |
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| walter | NICE!!! So... bindgen is using libclang under the hood, right? I just realized that we already have a working solution for compiling with clang, we just need to reuse it. | 17:43 |
| walter | We update `bindgen_args()` to remove the existing TCOVERRIDE from OVERRIDES and back `TCOVERRIDE = "toolchain-clang"` and then everything should work. | 17:44 |
| walter | BUT... I'm not sure I like the current fix for clang. I'll look more into things. We could improve things here, but that would be a different patch. | 17:44 |
| walter | for those playing along at home, this is the clang fix that we have in place: https://git.openembedded.org/openembedded-core/commit/?id=12c820f624730a04a17ae2cdbecc4e6987c45cf7 | 17:45 |
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| walter | s/and back/and add back/ | 17:54 |
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| walter | neachdainn: I ship my driver that is out-of-tree (but not for long) in the yocto project, since I'm the only one touching it. If that's the case for your file, go ahead; but if other teams are touching that file, you probably need an external repo. | 18:04 |
| neachdainn | walter: It's not a personal repo, but it isn't a large team - probably about six of us managing the layer. | 18:07 |
| walter | What do you folks think? is that TCOVERRIDE change a good approch to fixing bindgen? (I'll test my assumptions tomorrow and if things work, I'll send a patch in time for the weekly synk) | 18:07 |
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| walter | neachdainn, what do you mean by "full build meta-data", can't you just reuse build info from yocto? you should have everything there, just add the right inherit and DEPENDS and what not. | 18:17 |
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| neachdainn | walter: I mean something like the `CMakeLists.txt` or `Cargo.toml`. I.e., I'm not just manually calling GCC in the `do_compile` | 18:21 |
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| walter | It seems to work for rusticl. I'm curious if this also fixed the eSDK, testing now -- localdata = d.createCopy()\n localdata.setVar('TCOVERRIDE', 'toolchain-clang')\n items = localdata.expand(args).split() | 20:18 |
| walter | and I have a hunch this will also help with building Firefox for my Radxa Rock 4B+ (RK3399) | 20:18 |
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| walter | Nice! Mesa rusticl builds for OpenCL now work! I'll send a patch soon. Tomorrow I'll go back to working on camera drivers and incomplete datasheets and documentation :D | 20:23 |
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| walter | TADA: https://lists.openembedded.org/g/openembedded-core/message/239826 | 20:49 |
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| walter | I'm itching to give this a try, see what happens. I remeber it was a bindings issue when I last tried: https://bugzilla.mozilla.org/show_bug.cgi?id=1305341 | 21:26 |
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| walter | Ups, included a copy/paste mistake in there. Anyway, sent a follow-up | 21:42 |
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