[yocto] CPU Load
Hi y'all, I have some questions about CPU load and performance, but first some background information. We have small embedded system running an openembedded classic (Angström) distro. Now to get ourselves up-to-date we started working on a new iteration of the OS based on openembedded core and Yocto. It is nearly finished now, if it weren't for one problem: The CPU load (/proc/loadavg) of the core/yocto based OS is more than double that of the classic/Angström OS. So the way I see it this could be caused by a number of factors: - loadavg's calculation changed - certain newer versions of applications run heavier - The kernel itself is heavier (we upgraded from 2.6.35.14+ to 4.9.28+) - Possibly caused by some configs - ... My question: is there something that changed since OE-classic that you know could be the cause of this? If not, how would I go about finding the cause? I don't think the top command is sufficient for this, because it's precision is such that many processes' CPU usage just become 0%. Also, both top and htop cause huge cpu loads themselves. Any tips and tricks would be welcome! Thanks in advance! Ryan -- ___ yocto mailing list yocto@yoctoproject.org https://lists.yoctoproject.org/listinfo/yocto
Re: [yocto] Halt problem
Hi Alan, On 01/16/2018 08:48 AM, Alan Levy wrote: Shutdown is supposed to terminate all processes/threads so it's probably not about the watchdog daemon. It sounds more like the classic distro was disabling the hardware watchdog during shutdown and your new distro doesn't do that. Try comparing the kernel watchdog drivers in the two distros because that's the most likely culprit. I tried that, but I think the hardware watchdog can only be enabled on the at91sam9m10. I'll compare the drivers anyway. Thanks, and with kind regards, Ryan Meulenkamp -- ___ yocto mailing list yocto@yoctoproject.org https://lists.yoctoproject.org/listinfo/yocto
[yocto] Halt problem
Hi y'all, I ran into a problem using shutdown -h (or halt) on an openembedded-core (yocto) distro running on the Atmel at91sam9g45. We used to run an openembedded-classic (angström) based OS with kernel version 2.6.35.14+. Here, halting the system would cause it to shutdown without resetting, or turning the power off, to await a manual reset. Now we are building a new distro based on openembedded-core and yocto. Halting the system now causes a watchdog intervention. I tried all different arguments for both the shutdown and the halt command. It looks if though the classic based distro left the watchdog daemon running during a halt. What could be the cause of this problem? In what direction should I look (e.g. kernel config, sysvinit config, openembedded config, processor specific code etc.)? I'm not sure if this is the right mailing list to ask this question, but I guess one of you could point me in the right direction. Thanks in advance and kind regards, Ryan Meulenkamp -- ___ yocto mailing list yocto@yoctoproject.org https://lists.yoctoproject.org/listinfo/yocto
