[Freeswitch-users] 100% CPU usage
Grant Bagdasarian
gb at cm.nl
Thu Mar 30 11:10:59 MSD 2017
Cj,
I’m going to do some stress testing today using sipp. Once I have results and a possible solution, I’ll post it here.
From: freeswitch-users-bounces at lists.freeswitch.org [mailto:freeswitch-users-bounces at lists.freeswitch.org] On Behalf Of Cj B
Sent: woensdag 29 maart 2017 19:31
To: FreeSWITCH Users Help <freeswitch-users at lists.freeswitch.org>
Subject: Re: [Freeswitch-users] 100% CPU usage
Anthony, I apologize I’m appearing “entitled”. I was simply asking for any other pointers. I’ve followed all the suggestions here when submitting the jira and have done so. I was just asking if there were any other tips/hints about what to look at
Thanks for your response.
Cj B
On Mar 29, 2017, at 10:28 AM, Anthony Minessale <anthony.minessale at gmail.com<mailto:anthony.minessale at gmail.com>> wrote:
Try to avoid doing things like pointing out how frustrated you are when seeking help here. It makes those trying to help you feel like you are being entitled.
The suggestion on what to do was clearly outlined in previous posts in this thread including the exact commands to run when filing a jira.
On Wed, Mar 29, 2017 at 12:20 PM, Cj B <blackc2004 at gmail.com<mailto:blackc2004 at gmail.com>> wrote:
Hi All,
I’m having a very similar issue however it’s not staying at 100% CPU on physical hardware. I’ve created a JIRA but wanted to see if anyone else had any feedback on possible causes? I’m using freeswitch 1.6.15 (previously 1.6.13). What happens is that FS will jump to 100% CPU and stay there for 1-2 seconds then drop back down but this is then causing massive jitter/call quality issues for about 10-15 seconds after the spike. The strange thing that I’ve noticed is that even with 0 active calls, FS is using 15-30% cpu constantly with only 40-60 registered endpoints.
I’m watching the logs in DEBUG mode and not seeing anything there that’s indicative of any issue, no loops that I can see, and it seems to be happening when there’s even just 1 or 2 active calls on the system.
I’m wondering if there’s any other suggestions on where to look because this is getting very frustrating for me and my users.
Thanks much for any pointers!
Cj B
On Mar 22, 2017, at 8:13 AM, Anthony Minessale <anthony.minessale at gmail.com<mailto:anthony.minessale at gmail.com>> wrote:
top -H -p `pidof freeswitch`
Note the pid using 100% cpu
gcore `pidof freeswitch`
Attach it to a jira. If you think its a bug in FS you should report it to Jira not to this list.
https://freeswitch.org/jira
On Wed, Mar 22, 2017 at 10:14 AM Shaun Stokes <shaun.stokes at itec-support.co.uk<mailto:shaun.stokes at itec-support.co.uk>> wrote:
It’s probably a long shot, but if you’re able to replicate the problem it might be worth trying to replicate this on physical hardware. That way you eliminate your virtual environment from the problem, there are a number of factors which exist in virtual environments depending on your hyper-visor which can contribute to performance issues of which we’ve experienced in the past.
It would also be worth trying to isolate what the script is doing when the high CPU begins, if you’ve got a test environment you can use to replicate the issue then you could try tweaking the script so you can eliminate certain actions from the list of causes, there’s maybe a FreeSWITCH module which is being called which triggers this.
From: freeswitch-users-bounces at lists.freeswitch.org<mailto:freeswitch-users-bounces at lists.freeswitch.org> [mailto:freeswitch-users-bounces at lists.freeswitch.org<mailto:freeswitch-users-bounces at lists.freeswitch.org>] On Behalf Of Grant Bagdasarian
Sent: 22 March 2017 11:20
To: FreeSWITCH Users Help <freeswitch-users at lists.freeswitch.org<mailto:freeswitch-users at lists.freeswitch.org>>
Subject: Re: [Freeswitch-users] 100% CPU usage
@Shuan, yes we are using the session:ready() method before we execute.
We are running all of our servers virtually and never had any issues up until now.
This same application ran on older versions of freeswitch without issues, even during and after high load.
@Antonio, thanks for the tips! I’ll have a look and try some stuff.
From: freeswitch-users-bounces at lists.freeswitch.org<mailto:freeswitch-users-bounces at lists.freeswitch.org> [mailto:freeswitch-users-bounces at lists.freeswitch.org] On Behalf Of Antonio Silva
Sent: woensdag 22 maart 2017 10:09
To: freeswitch-users at lists.freeswitch.org<mailto:freeswitch-users at lists.freeswitch.org>
Subject: Re: [Freeswitch-users] 100% CPU usage
We had some issues using pcall functions like io.popen when trying to execute external commands, that block mod_lua, i end up replacing that with os.execute.
Recently i also had some issue with cpu hitting 100%,for what i could compile from debugging was something related with malloc calls. after compiling fs with tcmalloc the issue disappear, you could try this approach as well.
You can check jira: https://freeswitch.org/jira/browse/FS-9957 and also in the malling: "CPU sys load issue" for more info.
Regards,
António
On 03/22/2017 09:52 AM, Shaun Stokes wrote:
Are you using ‘if (session:ready()) then’ in your scripts before you execute?
Are you using virtual or physical hardware and what spec?
From: freeswitch-users-bounces at lists.freeswitch.org<mailto:freeswitch-users-bounces at lists.freeswitch.org> [mailto:freeswitch-users-bounces at lists.freeswitch.org] On Behalf Of Grant Bagdasarian
Sent: 22 March 2017 07:31
To: FreeSWITCH Users Help <freeswitch-users at lists.freeswitch.org><mailto:freeswitch-users at lists.freeswitch.org>
Subject: Re: [Freeswitch-users] 100% CPU usage
Anthony, we triple checked the script and its dependencies. There are no loops at all in the script. The imported scripts are also written by us and they too do not contain any loops.
It’s just basic call handling with some playback and play_and_get_digits calls, and some pcall calls to query a database.
From: freeswitch-users-bounces at lists.freeswitch.org<mailto:freeswitch-users-bounces at lists.freeswitch.org> [mailto:freeswitch-users-bounces at lists.freeswitch.org] On Behalf Of Anthony Minessale
Sent: dinsdag 21 maart 2017 16:02
To: FreeSWITCH Users Help <freeswitch-users at lists.freeswitch.org<mailto:freeswitch-users at lists.freeswitch.org>>
Subject: Re: [Freeswitch-users] 100% CPU usage
I already told you why a week ago. Your script most likely has an endless loop in it that does not check the condition session:ready()
However, Feel free to contact consulting at freeswitch.org<mailto:consulting at freeswitch.org> and we can formally diagnose it for a fee.
On Tue, Mar 21, 2017 at 6:42 AM Grant Bagdasarian <gb at cm.nl<mailto:gb at cm.nl>> wrote:
Attached are the logs for:
#check thread usage:
top -p $(cat /var/run/freeswitch/freeswitch.pid) -H -b -n 1
#memory mapping:
cat /proc/$(cat /var/run/freeswitch/freeswitch.pid)/maps
We’re unable to run gcore since freeswitch hogs all available cpu’s at 100%.
I tried changing the nice settings real-time but that didn’t work either.
At one point we had a huge spike in inbound traffic towards our freeswitch (valid traffic).
The traffic is handled by a lua application.
What we saw was calls hanging in freeswitch while they’ve already been physically disconnected.
After the huge spike freeswitch behaved normally for a couple of minutes and then suddenly started eating all the available cpu cores at 100%.
We have some db queries which are fired in the lua application, so these may cause the application to hang, but we haven’t reproduced it yet.
I’ll setup a test lab with the same configuration and fire sipp at it to see if I can reproduce the issue.
However, I probably won’t be able to run gcore for debugging. Any other suggestions?
Also we saw a lot of open udp ports and some had a huge read buffer size which did not decrease.
From: freeswitch-users-bounces at lists.freeswitch.org<mailto:freeswitch-users-bounces at lists.freeswitch.org> [mailto:freeswitch-users-bounces at lists.freeswitch.org<mailto:freeswitch-users-bounces at lists.freeswitch.org>] On Behalf Of Grant Bagdasarian
Sent: maandag 13 maart 2017 09:04
To: FreeSWITCH Users Help <freeswitch-users at lists.freeswitch.org<mailto:freeswitch-users at lists.freeswitch.org>>
Subject: Re: [Freeswitch-users] 100% CPU usage
Hi Antony and Antonio,
Thank you for the tips.
We haven’t had freeswitch going berserk anymore (not sure as to why it did perform without issue over the weekend), but will continue to monitor it and run the commands to trace the issue.
Regards,
Grant
From: freeswitch-users-bounces at lists.freeswitch.org<mailto:freeswitch-users-bounces at lists.freeswitch.org> [mailto:freeswitch-users-bounces at lists.freeswitch.org] On Behalf Of Anthony Minessale
Sent: zaterdag 11 maart 2017 00:07
To: FreeSWITCH Users Help <freeswitch-users at lists.freeswitch.org<mailto:freeswitch-users at lists.freeswitch.org>>
Subject: Re: [Freeswitch-users] 100% CPU usage
Make sure you lua script has all while loops including session:ready() as a condition to continue. Its a common mistake that leads to loops spinning out of control on hungup channels.
On Fri, Mar 10, 2017 at 6:11 AM, Antonio Silva <asilva at wirelessmundi.com<mailto:asilva at wirelessmundi.com>> wrote:
Hi,
You can use the following commands:
#get a core:
gcore -o /home/gcore-$(date +%s) $(cat /var/run/freeswitch/freeswitch.pid)
#check thread usage:
top -p $(cat /var/run/freeswitch/freeswitch.pid) -H -b -n 1
#memory mapping:
cat /proc/$(cat /var/run/freeswitch/freeswitch.pid)/maps
you can get some info from fs:
fs_cli -x "sofia global siptrace on"
fs_cli -x "fsctl debug_level 10"
fs_cli -x "sofia loglevel all 9"
fs_cli -x "fsctl debug_sql "
fs_cli -x "sofia global debug presence"
Put everything into a jira so we can take a look.
Regards,
António
On 03/10/2017 11:08 AM, Grant Bagdasarian wrote:
Hi,
We’re currently experiencing a weird issue with one of our freeswitch servers where the CPU just goes berserk and stays at 100%.
There are no active calls at that moment, but FS is still using 100% CPU.
I was unable to get a debug using gdb, since freeswitch does not crash.
We had this issue on 1.6.13 and then I upgraded to 1.6.15 this morning, but the problem still persists.
There is currently only one active application running on this box which is using LUA. Maybe that is causing the issue?
We checked the code but there are no weird loops etc. Perhaps we are missing something?
Any ideas how to trace this?
Regards,
Grant
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