Hello, It's always related to swapper and ksoftirqd:
Some examples here: https://pastebin.com/wn0nCwce Karl On Thu, May 30, 2019 at 3:11 PM Vasily Averin <v...@virtuozzo.com> wrote: > Dear Karl, > thank you for reporting the problem. > > no, it is not known issue. > moreover, I doubt it is related to real hardware interrupts, > soft-interrupts handles delayed procedures like processing of network > packets. > > For troubleshooting is to look at stack of affected running processes via > /proc/<pid>/stack > alternatively you can use magic sysrq key > # echo l > /proc/sysrq-trigger > it should dump current state of all running processors. > you can do it few times to monitor state of affected processes. > > Thank you, > Vasily Averin > > > On 5/30/19 7:54 PM, Karl Johnson wrote: > > Hello, > > > > I've upgraded from 2.6.32-042stab133.2 to 2.6.32-042stab138.1 and since > boot, 2 cores are using 100% cpu on ksoftirqd: > > > > root 21 99.9 0.0 0 0 ? R May29 1178:07 \_ > [ksoftirqd/4] > > root 25 99.9 0.0 0 0 ? R May29 1177:51 \_ > [ksoftirqd/5] > > > > From /proc/interrupts I can see that it's caused by IR-IO-APIC-edge > timer: > > > > CPU0 CPU1 CPU2 CPU3 CPU4 CPU5 > CPU6 CPU7 > > 0: 136922 103603 26928 27528 112318229 71888343 > 73755 285735 IR-IO-APIC-edge timer > > > > kernel /vmlinuz-2.6.32-042stab138.1 ro > root=UUID=7367aa0f-8216-44ca-9cc4-affed22bbd9c rd_NO_LUKS rd_NO_LVM > LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto > KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM nohz=off nopti > > > > Any way to troubleshoot this? Is it a known issue? > > > > Karl > > > > > > _______________________________________________ > > Users mailing list > > Users@openvz.org > > https://lists.openvz.org/mailman/listinfo/users > > >
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