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Dominique_71
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Joined: 17 Aug 2005
Posts: 1892
Location: Switzerland (Romandie)
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 Posted: Wed Apr 20, 2022 11:21 am Post subject: [solved, maybe] system freeze |
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On a new gentoo system, it run fine with a kernel base3d on the last gentoo-sources and genkernel, but with the rt-sources and genkernel, it just freeze. When this occur, 2 things are still working: the mouse cursor move but do nothing and the power button reset the computer when I press it during 5 seconds.
Which imply I have no clue about what to do in orde5r to debug this issue. I try to remove the cgroups from the rt-sources, that in order to only have 1 system to manage the rt priorities, that implied to remove elogind and install xorg-server with suid root. That changed nothing.
The sytem use startx to start fvwm with the fvwm-crystal themes. All is working fine until I start some windows like the files dialog of software like picpuz or the preferences window of glade. When doing so, the result is not systematic but occur very often: complete system freeze.
| Code: | # dmesg | egrep -i 'console|fbcon'
[ 0.090766] Console: colour VGA+ 80x25
[ 0.102901] printk: console [tty0] enabled
[ 0.704068] printk: console [tty0]: printing thread started
[ 17.459668] nouveau 0000:01:00.0: vgaarb: deactivate vga console
[ 17.462382] Console: switching to colour dummy device 80x25
[ 18.523551] fbcon: nouveaudrmfb (fb0) is primary device
[ 18.568592] Console: switching to colour frame buffer device 240x67
tux ~ # dmesg | grep firmware
[ 24.200109] ieee80211 phy0: rt2x00lib_request_firmware: Info - Loading firmware file 'rt2860.bin'
[ 24.245489] ieee80211 phy0: rt2x00lib_request_firmware: Info - Firmware detected - version: 0.40
[ 24.284494] ieee80211 phy1: rt2x00lib_request_firmware: Info - Loading firmware file 'rt2870.bin'
[ 24.284696] ieee80211 phy1: rt2x00lib_request_firmware: Info - Firmware detected - version: 0.36
# uname -r
5.16.2-rt-rt19-x86_64
$ fvwm3 --version
fvwm3 1.0.5 (1.0.4-124-g7ef3408f-dirty)
with support for: ReadLine, XPM, PNG, SVG, Shape, XShm, SM, Bidi text, XRandR, XRender, XCursor, XFT, NLS |
Last edited by Dominique_71 on Wed Apr 20, 2022 1:02 pm; edited 1 time in total |
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pietinger
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Joined: 17 Oct 2006
Posts: 5104
Location: Bavaria
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| Posted: Wed Apr 20, 2022 12:07 pm Post subject: |
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| Moved from Kernel & Hardware to Unsupported Software. |
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alamahant
Advocate
Joined: 23 Mar 2019
Posts: 3916
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| Posted: Wed Apr 20, 2022 12:11 pm Post subject: |
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You need apparently
| Code: |
CONFIG_PREEMPT_RT_FULL=y
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in your .config
OR
in make menuconfig navigate to and enable
| Code: |
Processor type and features -> Preemption Model -> Fully Preemptible Kernel (RT)
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_________________
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Dominique_71
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Joined: 17 Aug 2005
Posts: 1892
Location: Switzerland (Romandie)
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| Posted: Wed Apr 20, 2022 1:01 pm Post subject: |
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| alamahant wrote: | You need apparently
| Code: |
CONFIG_PREEMPT_RT_FULL=y
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in your .config
OR
in make menuconfig navigate to and enable
| Code: |
Processor type and features -> Preemption Model -> Fully Preemptible Kernel (RT)
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I know, it's done. The problem is not the premption but complete system freezes. I changed some options in grub.cfg and into the system, and with the time being, I am not able to reproduce that issue anymore. So maybe that is solved. For reference, I put here what I have done in chronological order:
| Code: | # /etc/default/grub.cfg
GRUB_CMDLINE_LINUX="isolcpus=1-7 nohz_full=1-7 rcu_nocbs=1-7 nowatchdog acpi_irq_nobalance" |
| Code: | # /etc/sysctl.d/local.conf
vm.swappiness = 10
dev.rtc.max-user-freq=3072
dev.hpet.max-user-freq=3072
fs.inotify.max_user_watches=524288 |
| Code: | # /root/bin/tune_rt
# I run it before login as user
#!/bin/bash
# move non-rt irqs to core 0
for i in 1 3 4 5 6 7 8 9 10 11 12 13 14 15 16 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 41
do
echo 1 >/proc/irq/$i/smp_affinity
done
#move rt irqs to core 1 (here audio irq =17 and irq = 40)
echo 2 >/proc/irq/17/smp_affinity
echo 2 >/proc/irq/40/smp_affinity
#disable rt throttling
echo -1 >/proc/sys/kernel/sched_rt_runtime_us
# disable smt
echo off > /sys/devices/system/cpu/smt/control |
For what I can get from the test I made, it is to disable smt that solved that issue. |
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