[Freeswitch-users] CPU sys load issue

Wed Mar 1 15:02:40 MSK 2017

We're planning on rolling it out but haven't yet done so. Need to schedule
some testing on it first.

I suspect the risk he refers to is if you're manually changing the system
clock you can cause large clock jumps. That can affect CDR timestamps,
either billing for longer periods than you should or getting negative call
durations.

If you're using the NTP daemon to get constant adjustments, it's configured
correctly, it starts on boot, is trustworthy, refuses to make large clock
changes and you're monitoring it properly you'll probably be fine. I'd
suggest using UTC for the system clock too, to guarantee you're not seeing
any DST jumps.

Steve

On 24 February 2017 at 18:02, Antonio Silva <asilva at wirelessmundi.com>
wrote:

> Hi Steven,
>
> Thanks for the tips.
>
> i don't use sync_clock_when_idle because it waits until there is 0 calls,
> if you never hit 0 calls then the clock is never sync, i wanted to be sure
> that is done.
>
> didn't know about  "enable-use-system-time",  just see the commit and
> there is a note from Anthony: "add enable-use-system-time param to
> switch.conf.xml *use at your own risk*", are you using it? does it affect
> performance?
>
> I've to tried it.
>
>
> About cpu sys to high and getting block, using tcmalloc seams to solve it,
> today everything went ok, no peaks in cpu sys.
> Next week i'll put back the sync_clock.
>
> Regards,
>
>
> On 02/24/2017 02:31 PM, Steven Ayre wrote:
>
> NTP adjusts the system clock while FS initialises a monotonic clock on
> start. FS doesn't see adjustments for drift by NTP.
>
> sync_clock_when_idle is better than sync_clock.
>
> You can also use the enable-use-system-time option which'll get it to use
> the system (and therefore NTP) time.
>
> On 23 February 2017 at 23:14, Antonio Silva <asilva at wirelessmundi.com>
> wrote:
>
>> i had a issue with cdr timestamp and the system date, after uptime of 140
>> days fs clock was behind 1min.
>> It has something between system clock and ntp, so to force fs to keep up
>> i force the sync_clock.
>>
>>
>>
>> On 02/24/2017 12:06 AM, Brian West wrote:
>>
>> First why did you ever call sync_clock?
>>
>> On Thu, Feb 23, 2017 at 4:51 PM, Antonio Silva <asilva at wirelessmundi.com>
>> wrote:
>>
>>> Hi Brian,
>>>
>>> Not for today, the first time it happens was my first though something
>>> with the traffic, but i couldn't find any association with the type of
>>> traffic. Actually after restart fs i receive traffic from the same
>>> endpoints, same type of calls and the issue don't reproduce until next
>>> morning...
>>>
>>> There was something i was doing at 00 every day, the command "fsctl
>>> sync_clock"... well i just disabled it today. I've to wait until tomorrow
>>> to check the results.
>>>
>>> I just install fs compiled with tcmalloc, so if there is no problems i
>>> will put back the "sync_clock " command to really check if it could be the
>>> cause.
>>>
>>> Right now i'm quite lost on what to do more...
>>>
>>>
>>>
>>> On 02/23/2017 11:37 PM, Brian West wrote:
>>>
>>> Do you have pcaps of the traffic that may trigger this behavior?
>>>
>>> /b
>>>
>>>
>>> On Thu, Feb 23, 2017 at 2:58 PM, Antonio Silva <asilva at wirelessmundi.com
>>> > wrote:
>>>
>>>> Thanks Juan, that's it, i was missing the dev pkg.
>>>>
>>>>
>>>>
>>>> On 02/23/2017 08:34 PM, Juan Pablo Godoy Macari wrote:
>>>>
>>>> Antonio, you should install this:
>>>>
>>>> apt-get install libgoogle-perftools-dev
>>>>
>>>> Regards,
>>>>
>>>> 2017-02-23 16:26 GMT-03:00 Juan Pablo Godoy Macari <
>>>> jpgodoy at redvoiss.net>:
>>>>
>>>>> Try this: ./configure LIBS="-ltcmalloc"
>>>>>
>>>>> 2017-02-23 16:19 GMT-03:00 Antonio Silva <asilva at wirelessmundi.com>:
>>>>>
>>>>>> Hi,
>>>>>>
>>>>>> Did you compile fs in debian with tcmalloc?
>>>>>>
>>>>>> didn't work for me... do i miss something?
>>>>>>
>>>>>>
>>>>>> root at dev:/usr/src/freeswitch.git# apt-get install
>>>>>> libtcmalloc-minimal4
>>>>>> root at dev:/usr/src/freeswitch.git# export LIBS=-ltcmalloc
>>>>>> root at dev:/usr/src/freeswitch.git# ./configure
>>>>>> checking for a BSD-compatible install... /usr/bin/install -c
>>>>>> checking whether build environment is sane... yes
>>>>>> checking for a thread-safe mkdir -p... /bin/mkdir -p
>>>>>> checking for gawk... no
>>>>>> checking for mawk... mawk
>>>>>> checking whether make sets $(MAKE)... yes
>>>>>> checking whether make supports nested variables... yes
>>>>>> checking whether make supports nested variables... (cached) yes
>>>>>> checking build system type... x86_64-unknown-linux-gnu
>>>>>> checking host system type... x86_64-unknown-linux-gnu
>>>>>> checking for style of include used by make... GNU
>>>>>> checking for gcc... gcc
>>>>>> checking whether the C compiler works... no
>>>>>> configure: error: in `/usr/src/freeswitch.git':
>>>>>> configure: error: C compiler cannot create executables
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> On 02/23/2017 07:56 PM, Antonio Silva wrote:
>>>>>>
>>>>>> Hi Juan,
>>>>>>
>>>>>> Thanks for the tips!!
>>>>>>
>>>>>> Unfortunately i cannot test with -nosql option, i need to have the
>>>>>> sip_registration fill to be able to send options to natted endpoints. But i
>>>>>> don't think the issue is in db, i use postgres and to get better
>>>>>> performance from it i run it on tmpfs.
>>>>>>
>>>>>>
>>>>>> I read about tcmalloc, but from jira FS-7315, i get the idea that it
>>>>>> didn't change anything.. but i guess i can try it and post the results,
>>>>>> from the bt i do see some calls been done to malloc, but not sure if they
>>>>>> are locking or not.
>>>>>>
>>>>>> Regards,
>>>>>>
>>>>>>
>>>>>> On 02/23/2017 06:52 PM, Juan Pablo Godoy Macari wrote:
>>>>>>
>>>>>> Hello Antonio,
>>>>>>
>>>>>> I had the same issue, to fix it i tried many things written in this
>>>>>> mail list. Try running FS with -nosql option, if that doesn't work
>>>>>> recompile FS with tcmalloc (from google's perfomance tools).
>>>>>>
>>>>>> That did it for me.
>>>>>>
>>>>>> Regards,
>>>>>> Juan Pablo.
>>>>>>
>>>>>> 2017-02-23 13:26 GMT-03:00 Antonio Silva <asilva at wirelessmundi.com>:
>>>>>>
>>>>>>> Hi,
>>>>>>>
>>>>>>> i'm having an issue with FS that gets lock every morning  with cpu
>>>>>>> sys
>>>>>>> hitting 80%, because is limited in fs with min-idle, it could reach
>>>>>>> the
>>>>>>> 100%, so the calls are rejected by load, to solve the problem i kill
>>>>>>> fs
>>>>>>> and start it again.
>>>>>>>
>>>>>>> I discard a load issue, because after restarting freeswitch the
>>>>>>> system
>>>>>>> increases in number of sessions/cps and no problems at all until next
>>>>>>> day.... it's given me crazy... i've enough memory, lots of cores...
>>>>>>> after restart fs the system stays at less than 30% of cpu usage.
>>>>>>>
>>>>>>>
>>>>>>> Right now i have hpet as clocksource, transcoding is minimal (use
>>>>>>> inheric_codec, only happens because of different ptimes with some
>>>>>>> endpoints) .
>>>>>>>
>>>>>>>
>>>>>>> anyone having similar problem? or any tip i can do to debug this
>>>>>>> issue?
>>>>>>>
>>>>>>>
>>>>>>> For info the Jira ticket can be located at
>>>>>>> https://freeswitch.org/jira/browse/FS-9957,
>>>>>>>
>>>>>>> i've done a gcore, top, htop when the system is with high cpu sys
>>>>>>> but i
>>>>>>> can't figure the thread that is causing the issue... initial i
>>>>>>> thought
>>>>>>> it was because of module lua (most of my logic is done there), but
>>>>>>> today
>>>>>>> only 2 threads where running mod_lua when it happen.
>>>>>>>
>>>>>>>
>>>>>>> Appreciate the help.
>>>>>>>
>>>>>>>
>>>>>>> --
>>>>>>>
>>>>>>> Saludos / Regards / Cumprimentos,
>>>>>>> António silva
>>>>>>>
>>>>>>>
>>>>>>> ____________________________________________________________
>>>>>>> _____________
>>>>>>> Professional FreeSWITCH Consulting Services:
>>>>>>> consulting at freeswitch.org
>>>>>>> http://www.freeswitchsolutions.com
>>>>>>>
>>>>>>> Official FreeSWITCH Sites
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>>>>>>>
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>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> _________________________________________________________________________
>>>>>> Professional FreeSWITCH Consulting Services: consulting at freeswitch.orghttp://www.freeswitchsolutions.com
>>>>>>
>>>>>> Official FreeSWITCH Siteshttp://www.freeswitch.orghttp://confluence.freeswitch.orghttp://www.cluecon.com
>>>>>>
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>>>>>>
>>>>>> _________________________________________________________________________
>>>>>> Professional FreeSWITCH Consulting Services: consulting at freeswitch.orghttp://www.freeswitchsolutions.com
>>>>>>
>>>>>> Official FreeSWITCH Siteshttp://www.freeswitch.orghttp://confluence.freeswitch.orghttp://www.cluecon.com
>>>>>>
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>>>>>>
>>>>>> _________________________________________________________________________
>>>>>> Professional FreeSWITCH Consulting Services:
>>>>>> consulting at freeswitch.org http://www.freeswitchsolutions.com
>>>>>> Official FreeSWITCH Sites http://www.freeswitch.org
>>>>>> http://confluence.freeswitch.org http://www.cluecon.com
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>>>>>
>>>>> _________________________________________________________________________
>>>> Professional FreeSWITCH Consulting Services: consulting at freeswitch.orghttp://www.freeswitchsolutions.com
>>>>
>>>> Official FreeSWITCH Siteshttp://www.freeswitch.orghttp://confluence.freeswitch.orghttp://www.cluecon.com
>>>>
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>>>> _________________________________________________________________________
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>>>> http://www.freeswitchsolutions.com Official FreeSWITCH Sites
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>>>
>>> --
>>>
>>> *Brian West* brian at freeswitch.org
>>>
>>> *Twitter: @FreeSWITCH , @briankwest*
>>>
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>>> Allison prompts for FreeSWITCH:
>>>
>>> *https://www.gofundme.com/allison-prompts-for-freeswitch*
>>> <https://www.gofundme.com/allison-prompts-for-freeswitch>
>>>
>>> Wish to schedule a meeting?
>>>
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>>>
>>> Got Bugs? Report them here <https://freeswitch.org/jira>! | Reddit:
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>>>
>>> *T:*+19184209001 <%28918%29%20420-9001> | *F:*+19184209002
>>> <%28918%29%20420-9002> | *M:*+1918424WEST (9378) *Skype:*briankwest
>>>
>>> _________________________________________________________________________
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>>>
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>>
>> --
>>
>> *Brian West* brian at freeswitch.org
>>
>> *Twitter: @FreeSWITCH , @briankwest*
>>
>> http://www.freeswitchbook.com  http://www.freeswitchcookbook.com Allison
>> prompts for FreeSWITCH:
>>
>> *https://www.gofundme.com/allison-prompts-for-freeswitch*
>> <https://www.gofundme.com/allison-prompts-for-freeswitch>
>>
>> Wish to schedule a meeting?
>>
>> http://app.timebridge.com/#/meet/freeswitch
>>
>> Got Bugs? Report them here <https://freeswitch.org/jira>! | Reddit:
>> /r/freeswitch <https://www.reddit.com/r/freeswitch>
>>
>> *T:*+19184209001 <%28918%29%20420-9001> | *F:*+19184209002
>> <%28918%29%20420-9002> | *M:*+1918424WEST (9378) *Skype:*briankwest
>>
>> _________________________________________________________________________
>> Professional FreeSWITCH Consulting Services: consulting at freeswitch.orghttp://www.freeswitchsolutions.com
>>
>> Official FreeSWITCH Siteshttp://www.freeswitch.orghttp://confluence.freeswitch.orghttp://www.cluecon.com
>>
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>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-usershttp://www.freeswitch.org
>>
>> _________________________________________________________________________
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>> http://www.freeswitchsolutions.com Official FreeSWITCH Sites
>> http://www.freeswitch.org http://confluence.freeswitch.org
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>
> _________________________________________________________________________
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>
> Official FreeSWITCH Siteshttp://www.freeswitch.orghttp://confluence.freeswitch.orghttp://www.cluecon.com
>
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>
>
> _________________________________________________________________________
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> http://www.freeswitchsolutions.com
>
> Official FreeSWITCH Sites
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>
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