[Freeswitch-users] FreeSWITCH-users Digest, Vol 150, Issue 16
Melek Oktay
melekoktay at gmail.com
Thu Dec 20 09:05:03 UTC 2018
*the problem isnt freeswitch, but your event consumer isnt consuming the
events fast enough. you should adjust your side of the equation.the event
queue is what drives everything *
Hi again,
I think FreeSwitch core mechanism should not be blocked when user module
consuming thread is not fast enough. Per-module event queue with
multi-thread consumer thread mechanism could solve this issue, or something
else (i don't know).
Since user can add its module to the Freeswitch, s/he could not block core
of freeswitch since its wrong action i think.
Regards
On Sun, Dec 9, 2018 at 1:31 PM <
freeswitch-users-request at lists.freeswitch.org> wrote:
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> 1. Re: FreeSwitch blocked (Ken Rice)
>
>
>
> ---------- Forwarded message ----------
> From: Ken Rice <krice at freeswitch.org>
> To: FreeSWITCH Users Help <freeswitch-users at lists.freeswitch.org>
> Cc:
> Bcc:
> Date: Sat, 8 Dec 2018 03:03:30 -0600
> Subject: Re: [Freeswitch-users] FreeSwitch blocked
> the problem isnt freeswitch, but your event consumer isnt consuming the
> events fast enough. you should adjust your side of the equation.
>
> the event queue is what drives everything
>
> Sent from my iPhone
>
> On Dec 7, 2018, at 01:29, Melek Oktay <melekoktay at gmail.com> wrote:
>
> Hi,
>
> After deeply research about this issue, we understand *Freeswitch-Core*
> mechanism and three possible solutions for fixing these issue.
>
> Here the link
> https://stackoverflow.com/questions/53609817/freeswitch-blocked
>
> Actually it would be be better third solution supported by *Freeswitch*,
> before deliver event to module, it create new thread for not waiting
> consumer thread (event hendler)
>
> On Fri, Dec 22, 2017 at 8:35 AM Melek Oktay <melekoktay at gmail.com> wrote:
>
>>
>> Hi,
>>
>> FreeSwitch software working well in a few days (~3 - 5 days), then new
>> incoming call requests are accepted since FreeSwitch is blocked !! Ongoing
>> calls continue their session, their calls seems not effected, but new calls
>> are not accepted. I got FreeSwitch snapshot and analyzed it in GDB.
>>
>> I have 601 therads & most of them are waiting
>>
>> Thread 0x7f16bc55f700 (LWP 28544) pthread_cond_wait@@GLIBC_2.3.2 () at
>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
>>
>> When i apply "*thread apply all bt*" in gdb, I see most of the threads
>> try to push events into queue (*switch_queue_push *)
>>
>> Thread 600 (Thread 0x7f16bc55f700 (LWP 28544)):
>> #0 pthread_cond_wait@@GLIBC_2.3.2 () at
>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
>> #1 0x00007f180cf9b87d in apr_thread_cond_wait (cond=<optimized out>,
>> mutex=<optimized out>) at locks/unix/thread_cond.c:68
>> #2 0x00007f180cf92dd0 in apr_queue_push (queue=queue at entry=0x7f180db157a8,
>> data=data at entry=0x7f16d3d5ec20) at misc/apr_queue.c:166
>> #3 0x00007f180cc958fb in *switch_queue_push *(queue=*0x7f180db157a8*,
>> data=data at entry=*0x7f16d3d5ec20*) at src/switch_apr.c:1134
>> #4 0x00007f180cd17850 in switch_event_queue_dispatch_event
>> (eventp=0x7f16bc55ec48) at src/switch_event.c:384
>> #5 switch_event_fire_detailed (file=file at entry=0x7f180cfb07ea
>> "src/switch_channel.c", func=func at entry=0x7f180cfb2ba0 <__func__.18348>
>> "switch_channel_perform_set_running_state", line=line at entry=2260,
>> event=event at entry=0x7f16bc55ec48, user_data=user_data at entry=0x0) at
>> src/switch_event.c:1986
>> #6 0x00007f180cc9f118 in switch_channel_perform_set_running_state
>> (channel=0x7f17e3e7de00, state=CS_NEW, file=0x7f180cfbc590
>> "src/switch_core_state_machine.c", func=<optimized out>, line=543) at
>> src/switch_channel.c:2260
>> #7 0x00007f180ccc87d0 in switch_core_session_run
>> (session=0x7f17e3e7fd28) at src/switch_core_state_machine.c:543
>> #8 0x00007f180ccc36de in switch_core_session_thread (thread=<optimized
>> out>, obj=0x7f17e3e7fd28) at src/switch_core_session.c:1629
>> #9 0x00007f180ccbf47d in switch_core_session_thread_pool_worker
>> (thread=0x7f17e3e9abb0, obj=0x80) at src/switch_core_session.c:1692
>> #10 0x00007f180cfa1910 in dummy_worker (opaque=0x7f17e3e9abb0) at
>> threadproc/unix/thread.c:151
>> #11 0x00007f180c1e0064 in start_thread (arg=0x7f16bc55f700) at
>> pthread_create.c:309
>> #12 0x00007f180b8b862d in clone () at
>> ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
>>
>>
>> More interesting thing is below, when I look up event type, approximately
>> all of them are "SWITCH_EVENT_CHANNEL_STATE" and switch_queue (i think
>> sofia_module queue is used in this scenario ) *become full* !!! *nelts*
>> (number of elements ) and *bounds *values are equal, and there are 553
>> (full_waiters) waiters try to push , but no body try to consume it
>> (empty_waiters = 0)
>>
>> (gdb) print *(switch_queue_t *) *0x7f180db157a8*
>> $1 = {
>> data = 0x7f1805cfe038,
>> nelts = 50000,
>> in = 43000,
>> out = 43000,
>> bounds = 50000,
>> full_waiters = 553,
>> empty_waiters = 0,
>> one_big_mutex = 0x7f180db157e8,
>> not_empty = 0x7f180db15838,
>> not_full = 0x7f180db15890,
>> terminated = 0
>> }
>>
>> (gdb) print *(switch_event_t *) *0x7f16d3d5ec20*
>> $1 = {
>> event_id = SWITCH_EVENT_CHANNEL_STATE,
>> priority = SWITCH_PRIORITY_NORMAL,
>> owner = 0x0,
>> subclass_name = 0x0,
>> headers = 0x7f16d3d5f750,
>> last_header = 0x7f16d3d601d0,
>> body = 0x0,
>> bind_user_data = 0x0,
>> event_user_data = 0x0,
>> key = 0,
>> next = 0x0,
>> flags = 0
>> }
>>
>>
>> Why i am gonna getting this state?
>>
>> Any thoughts, tips, tricks would be much appreciated.
>>
>> Regards,
>>
>> Angel
>>
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