[Voyage-linux] Cron 100% CPU

[bentscrewdriver]

Okay, this one still has me puzzled. I've downgraded the net6501 to
0.7.5 with the same results. I can consistently duplicate this issue
by performing a fresh install, installing only keepalived and haproxy,
rebooting and cron start spiking to 100%, at what looks like, each
wakeup. The odd thing is that if I remove those two packages and
reboot cron still spikes. I then clear out /etc/crontab and
/etc/cron.daily, restart cron - and it still spikes. The only thing
I've found to stop it is another fresh install or /etc/init.d/cron
stop (of course).

Any ideas on this? Punky - can you duplicate it on your 6501?

On Fri, Jul 27, 2012 at 11:06 AM, bentscrewdriver
<bentscrewdriver at gmail.com> wrote:
> I commented everything out in /etc/crontab and there are no other
> crontabs for any users (/var/spool/cron/crontabs) so it shouldn't even
> be running anything. This is why i am puzzled by the high usage.
>
> On Fri, Jul 27, 2012 at 10:54 AM, Teco Boot <teco at inf-net.nl> wrote:
>> What is in /etc/crontab?
>> What happens if you run the cron commands by hand?
>>
>> Teco
>>
>> Op 27 jul. 2012, om 16:26 heeft bentscrewdriver het volgende geschreven:
>>
>>> I've stopped keepalived as well as haproxy and cron still spikes to
>>> 100%  and stays there for a minute or so. Any other ideas? lsof
>>> doesn't show anything different...thanks.
>>>
>>> top - 21:47:06 up 10 days, 22:47,  3 users,  load average: 0.30, 0.44, 0.48
>>> Tasks:  44 total,   2 running,  41 sleeping,   0 stopped,   1 zombie
>>> Cpu(s): 67.2%us, 32.5%sy,  0.0%ni,  0.0%id,  0.0%wa,  0.0%hi,  0.3%si,  0.0%st
>>> Mem:   2075148k total,   130808k used,  1944340k free,      256k buffers
>>> Swap:        0k total,        0k used,        0k free,   103936k cached
>>>
>>>  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
>>> 22561 root      20   0  2120  492  372 R  100  0.0   7:51.65 cron
>>> 29911 root      20   0  2372 1032  820 R    1  0.0   8:42.16 top
>>>    4 root      20   0     0    0    0 S    0  0.0   4:04.04 kworker/0:0
>>>    1 root      20   0  2072  672  580 S    0  0.0   0:20.41 init
>>>    2 root      20   0     0    0    0 S    0  0.0   0:00.00 kthreadd
>>>    3 root      20   0     0    0    0 S    0  0.0   0:00.01 ksoftirqd/0
>>>    5 root      20   0     0    0    0 S    0  0.0   0:00.06 kworker/u:0
>>>    6 root      RT   0     0    0    0 S    0  0.0   0:00.00 migration/0
>>>    7 root      RT   0     0    0    0 S    0  0.0   0:00.00 migration/1
>>>    8 root      20   0     0    0    0 S    0  0.0   0:00.00 kworker/1:0
>>>    9 root      20   0     0    0    0 S    0  0.0   0:00.01 ksoftirqd/1
>>>   10 root      20   0     0    0    0 S    0  0.0   0:05.88 kworker/0:1
>>>   11 root       0 -20     0    0    0 S    0  0.0   0:00.00 khelper
>>>   12 root      20   0     0    0    0 S    0  0.0   0:00.49 kdevtmpfs
>>>   13 root      20   0     0    0    0 S    0  0.0   0:00.00 kworker/u:1
>>>  123 root      20   0     0    0    0 S    0  0.0  71571:58 sync_supers
>>>  125 root      20   0     0    0    0 S    0  0.0   0:00.09 bdi-default
>>>
>>>
>>> p
>>>
>>> On Thu, Jul 26, 2012 at 9:04 PM, Kim-man 'Punky' TSE
>>> <punkytse at punknix.com> wrote:
>>>> On 7/27/2012 12:34 AM, bentscrewdriver wrote:
>>>>>
>>>>> 26652 ?        Ss     0:36 /usr/sbin/keepalived
>>>>> 26654 ?        S      0:39 /usr/sbin/keepalived
>>>>> 26655 ?        S      6:57 /usr/sbin/keepalived
>>>>> 29529 ?        Rs     4:29 /usr/sbin/cron -L 2
>>>>
>>>> As shown, cron and keepalived spend much more user time than others.  May be
>>>> you should check what you have done with keepalived first.
>>>>
>>>> --
>>>> Regards,
>>>> Kim-man "Punky" Tse
>>>>
>>>> * Open Source Embedded Solutions and Systems
>>>>  - Voyage Linux (http://linux.voyage.hk)
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