[Users] Lots of interrupts since latest el6 kernel

[Narcis Garcia]

How exactly to see if other HW nodes reproduce the problem?


El 30/5/19 a les 21:39, Karl Johnson ha escrit:
> 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 <vvs at virtuozzo.com
> <mailto:vvs at 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
>     >
>     >
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> 
> 
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