Monday, 2023-01-30

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mckoangood morning07:41
Schlumpfgood morning07:41
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LetoThe2ndyo dudX08:09
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KareemZarka[m]morning all! do we prefer to sumbit merge request to upstream? or a patch attached by email? for a small change regardng a script within oe-core/scripts/lib/wic/bootimg-efi/py?08:35
JaMaKareemZarka[m]: see README file which recommends git send-email, there is no need for whole pull-request with cover letter if it's just 1 commit08:38
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Guest40goodmorning all08:41
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Guest40Sorry if seems a stupid question: Is there a way to include the generated rootfs.tar.bz2 file in the image itself ? ( possible scenario: the factory-reset procedure of a device require the rootfs file )08:46
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LetoThe2ndGuest40: yes, by chaining builds. see multiconfig08:51
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Guest40so using IMAGE_POSTPROCESS_COMMAND is it not possible ? i mean...the fisical rootfs file is not yet generated in this step ?08:52
LetoThe2ndGuest40: an image is only one rootfs. so what you technically could do is by defining a custom image type include the *very same* rootfs again as a tar.gz. but that sounds like needlessly restricting yourself.08:53
RPGuest40: you could depend on another image recipe which could provide that second rootfs08:54
LetoThe2ndRP: okay thats possible too, yes. but still restricts you to the very same machine and distro and local configs.08:56
RPLetoThe2nd: right, just saying it is an option08:58
LetoThe2ndRP: +108:58
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Guest40so technically i09:10
Guest40have to create another .bb recipe of the same image...and depends on that one09:10
Guest40thank you very much for the explanation!09:11
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Guest79hi, anyone using "meta-raspberrypi" dunfell and kirkstone? There is a performance loss in my app and when i benchmarked with sysbench, i found that the threads running slower in the Kirkstone.10:53
qschulzagherzan: I think this is for you? ^10:53
LetoThe2ndyeah. i think many are using it, but a performance regression has not been mentioned AFAIK.10:54
LetoThe2nd(i also use both revisions, but not doing anything that could exhibit such an observation)10:54
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Guest79If you want a detailed explanation, i can write how i came to this conclusion and why i suspect threads.10:56
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LetoThe2ndwell as i am not the one to solve it, probably not required here. if you think it is originally caused by meta-raspberrypi (and not some package that it just provides), then maybe file an issue on github?10:58
Guest79LetoThe2nd i thought of opening an issue but before opening it, i wanted to ask if anyone else has encountered such a problem.11:03
LetoThe2ndGuest79: :-) so while it is not an authoritative answer, i think this channels answer to that is "not yet reported"11:04
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rburtonhm why are there so many CVEs still in master. I should have made a load of those disappear.11:24
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rburtonhm none of my mails to nist were actioned11:38
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agherzanGuest79: as people mentioned above, nothing I'm aware of either.12:01
agherzanWe would need to narrow it down a bit trying to figure out if it's BSP or package level12:01
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agherzanAlso, what kinda performance loss are we talking about - percentage-wise.12:02
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vikHi. Does anyone have experience with yocto hash equivalence server in case of multiple platform builds?12:14
vikCan we cover this use case with single running hash server instance or we need running hash server for each platform?12:14
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rburtonvik: single instance if you share a sstate12:18
rburtonbasically, the hash server is tied to a sstate12:19
vikwell for each platform we have separate sstate-cache12:24
vikso that means that we need multiple instance then, thank you rburton12:26
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rburtonyou can share sstate between platforms fwiw12:49
vikSo if I have two different architectures for example x86 and arm64 I could use same folder for SSTATE_MIRRORS to share cache?13:06
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vikNaming inside sstate cache folder is unique enough? I would lose any date due overwrite13:07
vikNaming inside sstate cache folder is unique enough? I wouldn't lose any date due overwrite?13:07
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rburtonyou can always share sstate13:09
rburtonthat's the point of the 'shared' bit :)13:09
rburtonthe autobuilder has arm and x86 hosts, building for all of the qemu machines _and_ two meta-arm machines _and_ two meta-intel machines, with different libcs and distro configurations.13:09
rburtonone sstate13:09
vikThx, good to know. So then i'm good with single instance of server.13:13
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vikOne more question rburton, can i combine sstate cache with different version of yocto?13:36
rburtonyes13:37
vikGreat, will try :)13:37
JaMayou can, but it's not very useful to share in that case13:37
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JaMaI keep sstate-cache separate for different releases, because it makes the cleanup a bit faster (and can clean cache from master more often as it also grows much faster cache from releases)13:39
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KareemZarka[m]<JaMa> "Kareem Zarka: see README file..." <- I'm not able to send a patch using git-email because I dont have SMTP access ,13:48
KareemZarka[m]would it be fine to simply include the patch in the body of the email ?13:48
KareemZarka[m]or shall I just make a merge request with the change ?13:48
rburtonpatches are via email.  if you can't send a patch, complain to management.13:49
KareemZarka[m]rburton: oh yes I can send emails but not thru SMTP13:51
KareemZarka[m]I can simply send a email with body containing the patch ?13:51
KareemZarka[m]" Just include the patch in the body of your email. Make sure you use an email client that does not touch the message (turn spaces in tabs, wrap lines etc etc)."13:51
rburtonyou can try and it most likely won't work as mailers tend to break the patch.13:51
JaMaif you cannot send it from company network, you can send it from home later and complain to management as rburton said13:52
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Guest79agherzan Here's how i discovered the performance difference between "meta-raspberrypi" dunfell and kirkstone:14:01
Guest791) I'm doing CPS(Cycle Per Second) calculation in my code. I see between 23-25 in Dunfell, 15-17 in Kirkstone. I debug in my code to understand what is causing low cps and i noticed that OpenCV's resize() function is returning slower in Kirkstone.14:01
Guest792) I created a main.cpp and resized 1640x1232 and 640x480 cv::Mat to 300x300 5000 times in it and calculated the elapsed time.14:01
Guest79In Kirkstone, the 1640x1232 resolution takes 30-31 seconds to resize. In Dunfell, it's 19-20 seconds.14:01
Guest79I zip the code (C++) and test results i wrote, I will share it below.14:01
Guest793) I thought the problem would be caused by OpenCV, but the OpenCV version i used in Dunfell and Kirkstone is the same and the recipes are the same. However, i pulled the latest OpenCV version from the "meta-openembedded" master and got a build. But, the result did not change.14:01
Guest794)I finally thought of benchmarking with the "sysbench" tool. I noticed something like this in the thread workload benchmark I made:14:01
Guest79While a single thread can execute 4125 events in 20 seconds in Kirkstone, it can execute 9227 events in Dunfell. I am sharing the test results below.14:01
Guest79**Test results of step 2 and 4 : https://easyupload.io/rfgfmx14:01
Guest79**If you want me to upload it somewhere else, I can upload it there.14:01
Guest79By the way, i'm new to Yocto. I looked for my mistake as best i could and tried to solve it. I did everything i could to the best of my knowledge and came to the conclusion that the problem was not my fault. Maybe i am wrong but believe me i tried to figure it out myself before i came here. I'm sorry if im wrong, I'd appreciate it if you corrected14:01
Guest79it.14:01
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qschulzGuest79: dependencies of openCV might have been updated meanwhile (or its defaults changed), so checking opencv recipe may not be enough (just giving a hint of things to check next).14:02
JaMaGuest79: can you compare CC variables? IIRC DEFAULTTUNE changed for rpi machines so it might be much less optimized now14:03
qschulzGuest79: bitbake-getvar -r opencv CC (and CFLAGS, CXXFLAGS or whatever) would return what JaMa is suggesting to look at I think14:03
rburtonthis isn't the first time i've seen someone comment that rpi is slower when upgrading so its good to see a bit of poking at the problem14:04
JaMaGuest79: what rpi MACHINE are you using?14:04
Guest79qschulz thanks for explaining.14:07
Guest79JaMa14:07
Guest79#14:07
Guest79# $CC [2 operations]14:07
Guest79#   exported /opt/TriOS/trios-yocto-bsp/sources/poky/meta/conf/bitbake.conf:55114:07
Guest79#     [export] "1"14:07
Guest79#   set /opt/TriOS/trios-yocto-bsp/sources/poky/meta/conf/bitbake.conf:55114:07
Guest79#     "${CCACHE}${HOST_PREFIX}gcc ${HOST_CC_ARCH}${TOOLCHAIN_OPTIONS}"14:08
JaMarpi4-64 from -mcpu=cortex-a72+crc+crypto to "-mcpu=cortex-a72 -march=armv8-a+crc", probably not that significant14:08
Guest79# pre-expansion value:14:08
Guest79#   "${CCACHE}${HOST_PREFIX}gcc ${HOST_CC_ARCH}${TOOLCHAIN_OPTIONS}"14:08
Guest79export CC="arm-mt-linux-gnueabi-gcc  -mthumb -mfpu=neon-vfpv4 -mfloat-abi=hard -mcpu=cortex-a7 -I/opt/TriOS/trios-yocto-bsp/build_trueai32/tmp/work/cortexa7t2hf-neon-vfpv4-mt-linux-gnueabi/opencv/4.5.2-r0/git/include  -fstack-protector-strong  -O2 -D_FORTIFY_SOURCE=2 -Wformat -Wformat-security -Werror=format-security14:08
Guest79--sysroot=/opt/TriOS/trios-yocto-bsp/build_trueai32/tmp/work/cortexa7t2hf-neon-vfpv4-mt-linux-gnueabi/opencv/4.5.2-r0/recipe-sysroot"14:08
JaMaGuest79: please use pastebin14:08
Guest79sorry, i forgot.14:08
JaMaand it's 32bit, ok, that didn't change14:08
Guest79https://pastebin.com/7Qc3K0Pu also rpi4 32 bit machine.14:09
JaMacan you try to downgrade the kernel in kirkstone or upgrade in dunfell?14:09
JaMathat is IIRC 5.4 to 5.1514:10
Guest79JaMa as i said, im new to Yocto. I need to check how to do "kernel downgrade", after that i will write :)14:12
JaMacopying recipes-kernel/linux/ from kirkstone to dunfell version of meta-raspberrypi might do the job (togeher with update of conf/machine/include/rpi-default-versions.inc:PREFERRED_VERSION_linux-raspberrypi ??= "5.15.%")14:19
qschulzJaMa: I suspect the overrides syntax change may make this a bit more difficult than just copying files14:22
JaMano kirkstone syntax is compatible with dunfell14:23
JaMaso it would be an issue only in the other direction (downgrade in kirkstone)14:23
Guest79i was doing opposite and trying to fix syntax. u saved me :D14:23
JaMaah :)14:24
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Guest79JaMa i got build without error. getting image&writing ...14:42
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Guest79JaMa i tried and it got even worse :D15:13
JaMaperformance with 5.15 kernel in dunfell is even worse than 5.15 in kirkstone?15:14
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Guest79yes :D   is it weird?15:15
JaMaGuest79: that might confirm that it's kernel related15:15
JaMaGuest79: I would suggest to finish that syntax conversion to test 5.4 kernel in kirkstone build15:16
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JaMaGuest79: there is a script to do the conversion, see https://git.openembedded.org/openembedded-core/tree/scripts/contrib/convert-overrides.py15:17
JaMaor revert the commit https://github.com/agherzan/meta-raspberrypi/commit/316b017c53f45da4fb76fab717f3e0a47b239f75 which was after the overrides syntax conversion and just adjust PREFERRED_VERSION_linux-raspberrypi15:18
Guest79JaMa thank you15:19
JaMaonce it's confirmed, you can also test with 5.10 version which is also available15:19
agherzanIt could be worth checking RaspberryPi OS too for comparison.15:19
JaMaGuest79: also are you sure, you're measuring it correctly? doesn't it depend on something random?15:20
agherzanAlso a bump in meta-raspberrypi kernel would be a good check15:20
Guest79JaMa the tests i do are not dependent on any random value or calculation.15:21
JaMaGuest79: if you have time I would be also interested in comparing it with 64bit build15:21
Guest79agherzan i will try it with latest Raspberrypi OS15:22
Guest79JaMa i will try when i finish your and agherzan steps.15:25
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Guest79im getting error while downgrading kernel to 5.15 to 5.4 in "meta-raspberrypi" kirkstone.16:37
Guest79https://pastebin.com/hJt62L7w16:37
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khemGuest79: you seem to have your own machine  config is that right ?17:32
khemKMACHINE_<yourmachine> = "raspberrypi4-64"17:34
khemshould fix it in a linux-rapberrypi_%.bbappend or main kernel recipe17:35
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Guest79khem right. i tried your suggestion but still getting same error. am i doing something wrong? just changed "raspberrypi4-64" to "raspberrypi4" because of my config 32bit.18:20
khemyes if its 32bit then use raspberrypi4 instead of raspberrypi4-6418:21
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Guest79khem also i defined it in source as you said, but i still get the same error. in "linux-raspberrypi_5.4.bb", added :18:36
Guest79KMACHINE_trueai-rp432 = "raspberrypi"18:36
Guest79*raspberrypi418:42
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khemhmm18:52
Guest79i think, i made a mistake somewhere else, im looking at it.18:54
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Guest79khem fixed. im dumb. i used a few lines of dunfell syntax in a recipe in kirkstone. :D18:58
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khemyeah it should be KMACHINE:<xxx>19:26
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LightningHopefully a quick question. I'm making some alterations to some of the cross compiling tools for a project, binutils specifically. How can I get the cross compiler tools to be rebuilt? I20:32
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LightningI'd assume bitbake -c compile binutils/???20:32
Lightningi'm unsure what to put as the target or how to say to rebuild the cross compiled version and not the version for my platform20:33
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rburtonLightning: just rebuild your target image and it will rebuild the tool chain. Yocto isn’t like some distros and knows when stuff needs to be rebuild. If you’d21:10
rburtonIf you changed binutils it will rebuild it, and then rebuild all the packages in your image21:10
Lightningok21:11
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khembitbake binutils-cross-<target> for cross compiling binutils22:57
khemif you are a toolchain geek 🙂22:58
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