Sander de Leeuw Posted December 13 Posted December 13 (edited) Hi, I am running the latest Armbian image with Noble + GNOME for the Rock 5C. I have build it using the `compile.sh` script without altering the kernel, desktop enabled, based on Noble, with GNOME, no applications, no extensions. Added the kisak PPA repo afterwards and enabled the panthor overlay for hardware acceleration. Should be close to the `Armbian_24.11.1_Rock-5c_noble_vendor_6.1.75_gnome-kisak_desktop.img` image, I think. With Chromium (few tabs), VSCodium (working on some code) and a couple of terminals open, things were crashing all the time. Here is a reproducable example with Chromium, when navigating to the URL: https://www.geeksforgeeks.org/ulimit-soft-limits-and-hard-limits-in-linux/ sander@rock-5c:~$ chromium [3743:3743:1213/231308.263364:ERROR:object_proxy.cc(576)] Failed to call method: org.freedesktop.ScreenSaver.GetActive: object_path= /org/freedesktop/ScreenSaver: org.freedesktop.DBus.Error.NotSupported: This method is not part of the idle inhibition specification: https://specifications.freedesktop.org/idle-inhibit-spec/latest/ [3743:3795:1213/231308.438912:ERROR:backend_impl.cc(989)] Critical error found -8 [3743:3795:1213/231308.439341:ERROR:entry_impl.cc(955)] Failed to save user data [3743:3795:1213/231308.821432:ERROR:backend_impl.cc(989)] Critical error found -8 [3743:3795:1213/231308.821616:ERROR:entry_impl.cc(955)] Failed to save user data [3743:3743:1213/231308.821621:ERROR:gpu_disk_cache.cc(233)] Failed retry to open blob cache entry: -2 [3845:3861:1213/231317.658891:ERROR:ffmpeg_common.cc(970)] Unsupported pixel format: -1 [4052:4052:1213/231324.240574:ERROR:platform_thread_posix.cc(155)] pthread_create: Resource temporarily unavailable (11) [4057:4057:1213/231324.266795:ERROR:platform_thread_posix.cc(155)] pthread_create: Resource temporarily unavailable (11) [3743:3793:1213/231324.269115:ERROR:zygote_communication_linux.cc(164)] Did not receive ping from zygote child [3743:3793:1213/231324.269180:FATAL:check.cc(361)] Check failed: false. NOTREACHED log messages are omitted in official builds. Sorry! [3764:3764:1213/231324.269109:ERROR:zygote_linux.cc(639)] Zygote could not fork: process_type renderer numfds 5 child_pid -1 [1213/231324.290657:ERROR:elf_dynamic_array_reader.h(64)] tag not found Trace/breakpoint trap I was also not able to use Firefox, at all. Every new tab ended up in a "Snap. Your page crashed" view. The root cause seems to be this: ERROR:platform_thread_posix.cc(155)] pthread_create: Resource temporarily unavailable (11) After some web searching, I found that the thread limits are set to a very low value. (note "max user processes") sander@rock-5c:~$ cat /proc/sys/kernel/threads-max 1685 sander@rock-5c:~$ ulimit -a real-time non-blocking time (microseconds, -R) unlimited core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 842 max locked memory (kbytes, -l) 1015884 max memory size (kbytes, -m) unlimited open files (-n) 1024 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) 8192 cpu time (seconds, -t) unlimited max user processes (-u) 842 virtual memory (kbytes, -v) unlimited file locks (-x) unlimited I searched through the Armbian build repository for code that sets these limits, but I didn't find any. Seems that these limits are set or calculated by rockchip linux kernel. After applying a few configuration changes, the system becomes much more stable and I have not had any crashes so far. # /etc/rc.local (updated) echo 16384 > /proc/sys/kernel/threads-max # /etc/security/limits.d/99-nproc.conf (created) * soft nproc 4096 * hard nproc 4096 # /etc/systemd/system.conf (updated) #DefaultTasksMax=15% DefaultTasksMax=infinity After a reboot, the changes are now applied. And no more crashes! And Firefox now works as well. sander@rock-5c:~$ cat /proc/sys/kernel/threads-max 16384 sander@rock-5c:~$ ulimit -u 4096 Hope this is useful to someone else. Edited December 13 by Sander de Leeuw 0 Quote
Sander de Leeuw Posted December 14 Author Posted December 14 (edited) I did some more testing. On the Rock 5C: The current "Armbian_24.11.1_Rock-5c_noble_edge_6.11.7_gnome-kisak_desktop.img.xz" image has the same problem. The vendor "rock-5c_bookworm_kde_b1.output.img.xz" does not have this problem. On the Orange Pi 5: The current "Armbian_24.11.2_Orangepi5_noble_vendor_6.1.75_gnome-kisak_desktop.img.xz" image has the same problem. (Slightly different values, see console log below) Joshua Riek's Ubuntu image does not have this problem. # Orange Pi 5: Armbian_24.11.2_Orangepi5_noble_vendor_6.1.75_gnome-kisak_desktop.img.xz sander@orangepi5:~$ free -h total used free shared buff/cache available Mem: 7.8Gi 844Mi 6.5Gi 242Mi 779Mi 6.9Gi Swap: 3.9Gi 0B 3.9Gi sander@orangepi5:~$ cat /proc/sys/kernel/threads-max 2378 sander@orangepi5:~$ ulimit -a real-time non-blocking time (microseconds, -R) unlimited core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 1189 max locked memory (kbytes, -l) 1015872 max memory size (kbytes, -m) unlimited open files (-n) 1024 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) 8192 cpu time (seconds, -t) unlimited max user processes (-u) 1189 virtual memory (kbytes, -v) unlimited file locks (-x) unlimited This is how it looks on Joshua Riek's Ubuntu image # Orange Pi 5: Joshua Riek's Ubuntu image sander@orangepi5:~$ free -h total used free shared buff/cache available Mem: 7.7Gi 1.7Gi 5.6Gi 100Mi 629Mi 6.1Gi Swap: 1.0Gi 0B 1.0Gi sander@orangepi5:~$ cat /proc/sys/kernel/threads-max 61133 sander@orangepi5:~$ ulimit -a real-time non-blocking time (microseconds, -R) unlimited core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 30566 max locked memory (kbytes, -l) 1014084 max memory size (kbytes, -m) unlimited open files (-n) 1024 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) 8192 cpu time (seconds, -t) unlimited max user processes (-u) 30566 virtual memory (kbytes, -v) unlimited file locks (-x) unlimited So it seems to be specific to Armbian and occur on multiple RK3588 boards. I will create an issue at Armbian's linux-rockchip project. Edited December 14 by Sander de Leeuw 0 Quote
Sander de Leeuw Posted December 14 Author Posted December 14 Issue opened here: https://github.com/armbian/linux-rockchip/issues/307 0 Quote
Solution Sander de Leeuw Posted December 15 Author Solution Posted December 15 It has been resolved by @nyanmisaka in this commit. Thanks a lot! 0 Quote
RaspberryGB Posted Friday at 12:43 PM Posted Friday at 12:43 PM @Sander de Leeuw Many thanks for this !!!!!!!!!!!!! I couldn't work out why Chromium would always crash with more then 3 tabs open ... and this has completely fixed the issue!! (OP5 Max) 0 Quote
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