[OpenSIPS-Users] UDP workers consume 100% CPU
Bogdan-Andrei Iancu
bogdan at opensips.org
Wed Aug 7 06:18:17 EDT 2019
Hi Vitalii,
As the backtraces show, it is a deadlock in TLS - if you remove the
proto_tls, you will not experience this issue anymore. The root problem
is not in OpenSIPS itself but in the libssl/libcrypto - what versions
are you using for these libs ?
Regards,
Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
https://www.opensips-solutions.com
OpenSIPS Summit 2019
https://www.opensips.org/events/Summit-2019Amsterdam/
On 08/05/2019 09:13 PM, Vitalii Aleksandrov wrote:
> Hi,
>
> I have a test opensips 2.4.6 (last week's checkout from 2.4 branch)
> and after short load testing it started to consume all CPU resources.
>
> Here is what opensips floods to syslog:
> Aug 3 13:25:01 l /opensips[4774]: WARNING:core:utimer_ticker: utimer
> task <tm-utimer> already scheduled for 114023190 ms (now 176231430
> ms), it may overlap..
> Aug 3 13:25:02 l /opensips[4774]: WARNING:core:utimer_ticker: utimer
> task <tm-utimer> already scheduled for 114023190 ms (now 176231530
> ms), it may overlap..
> Aug 3 13:25:02 l /opensips[4774]: WARNING:core:utimer_ticker: utimer
> task <tm-utimer> already scheduled for 114023190 ms (now 176231630
> ms), it may overlap..
> Aug 3 13:25:02 l /opensips[4774]: WARNING:core:utimer_ticker: utimer
> task <tm-utimer> already scheduled for 114023190 ms (now 176231730
> ms), it may overlap..
> Aug 3 13:25:02 l /opensips[4774]: WARNING:core:utimer_ticker: utimer
> task <tm-utimer> already scheduled for 114023190 ms (now 176231830
> ms), it may overlap..
> Aug 3 13:25:02 l /opensips[4774]: WARNING:core:utimer_ticker: utimer
> task <tm-utimer> already scheduled for 114023190 ms (now 176231930
> ms), it may overlap..
> Aug 3 13:25:02 l /opensips[4774]: WARNING:core:utimer_ticker: utimer
> task <tm-utimer> already scheduled for 114023190 ms (now 176232030
> ms), it may overlap..
> Aug 3 13:25:02 l /opensips[4774]: WARNING:core:timer_ticker: timer
> task <tm-timer> already scheduled for 114023090 ms (now 176232030 ms),
> it may overlap..
>
> Where 4774 is: "Process:: ID=7 PID=4774 Type=timer"
>
> Here is the TOP output for time consuming processes:
> PID USER PR NI VIRT RES SHR S %CPU %MEM
> TIME+ COMMAND
> 4801 opensips 20 0 721040 28496 24240 R 52.9 0.7 1817:08
> opensips
> 4802 opensips 20 0 721040 27724 23588 R 47.1 0.7 1813:06
> opensips
> 4806 opensips 20 0 721040 27640 23532 R 47.1 0.7 1814:41
> opensips
> 4833 opensips 20 0 721040 28848 24812 R 47.1 0.7 1815:16
> opensips
> 4803 opensips 20 0 721044 27928 23732 R 41.2 0.7 1817:09
> opensips
> 4804 opensips 20 0 721040 28188 23996 R 41.2 0.7 1816:05
> opensips
> 4799 opensips 20 0 721040 28272 24172 R 35.3 0.7 1813:29
> opensips
> 4800 opensips 20 0 721040 28340 24204 R 29.4 0.7 1816:52
> opensips
> 4805 opensips 20 0 723256 29620 25300 R 29.4 0.8 1819:28
> opensips
>
> And here is the "opensipsctl ps" for them:
> Process:: ID=32 PID=4799 Type=SIP receiver udp:127.0.0.1:5070
> Process:: ID=33 PID=4800 Type=SIP receiver udp:127.0.0.1:5070
> Process:: ID=34 PID=4801 Type=SIP receiver udp:127.0.0.1:5070
> Process:: ID=35 PID=4802 Type=SIP receiver udp:127.0.0.1:5070
> Process:: ID=36 PID=4803 Type=SIP receiver udp:127.0.0.1:5070
> Process:: ID=37 PID=4804 Type=SIP receiver udp:127.0.0.1:5070
> Process:: ID=38 PID=4805 Type=SIP receiver udp:127.0.0.1:5070
> Process:: ID=39 PID=4806 Type=SIP receiver udp:127.0.0.1:5070
> Process:: ID=66 PID=4833 Type=TCP receiver
>
> "strace" output for those burning processes just floods with:
> 11:07:04.042794 sched_yield() = 0
> 11:07:04.042869 sched_yield() = 0
> 11:07:04.042943 sched_yield() = 0
> 11:07:04.043016 sched_yield() = 0
> 11:07:04.043090 sched_yield() = 0
> 11:07:04.043164 sched_yield() = 0
>
> Unfortunately this opensips is striped and gdb output is limited.
> GDB bt of TCP receiver:
> (gdb) bt
> #0 0x00007f939211fe57 in sched_yield () at
> ../sysdeps/unix/syscall-template.S:78
> #1 0x00007f936fffc14d in ?? () from
> /usr/lib/x86_64-linux-gnu/opensips/modules/proto_tls.so
> #2 0x00007f93791698d5 in send_pr_buffer () from
> /usr/lib/x86_64-linux-gnu/opensips/modules/tm.so
> #3 0x00007f93791626b8 in relay_reply () from
> /usr/lib/x86_64-linux-gnu/opensips/modules/tm.so
> #4 0x00007f937919fe2a in timer_routine () from
> /usr/lib/x86_64-linux-gnu/opensips/modules/tm.so
> #5 0x000055e00034a58a in handle_timer_job ()
> #6 0x000055e00041ae2a in tcp_worker_proc_loop ()
> #7 0x000055e000427218 in tcp_start_processes ()
> #8 0x000055e0002e6837 in main ()
>
> GDB bt of UDP receiver:
> #0 0x00007f939211fe57 in sched_yield () at
> ../sysdeps/unix/syscall-template.S:78
> #1 0x00007f936fffc14d in ?? () from
> /usr/lib/x86_64-linux-gnu/opensips/modules/proto_tls.so
> #2 0x00007f93791698d5 in send_pr_buffer () from
> /usr/lib/x86_64-linux-gnu/opensips/modules/tm.so
> #3 0x00007f93791626b8 in relay_reply () from
> /usr/lib/x86_64-linux-gnu/opensips/modules/tm.so
> #4 0x00007f9379165015 in reply_received () from
> /usr/lib/x86_64-linux-gnu/opensips/modules/tm.so
> #5 0x000055e000322fed in forward_reply ()
> #6 0x000055e000309d1d in receive_msg ()
> #7 0x000055e00042b4be in ?? ()
> #8 0x000055e000413dd8 in udp_start_processes ()
> #9 0x000055e0002e6724 in main ()
>
> Those workers don't process any incoming SIP messages and just stay in
> this infinite loop.
>
> Any input is very appreciated.
>
>
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