[Freeswitch-users] Thread failure with low CPU utilization?

Vladislav Ivanov deforceczt at gmail.com
Mon Dec 14 18:46:53 MSK 2015


Hello,

I have 1.6.5 Freeswitch and I'm trying to test how much lines/cps it can
handle on my test machine:

CPU: Intel(R) Xeon(R) CPU E5450  @ 3.00GHz x2 (8 cores, 3 GHz)
RAM: 32GB
SSD: 500 GB

I'm using call generator to check flood the freeswitch, but when FS gets 1k
sessions it sends
[CRIT] switch_core_session.c:1781 Thread Failure!
and the Star Wars quote... But the CPU load is less than 10%

Ulimit is as follows:
core file size          (blocks, -c) 0
data seg size           (kbytes, -d) unlimited
scheduling priority             (-e) 0
file size               (blocks, -f) unlimited
pending signals                 (-i) 128330
max locked memory       (kbytes, -l) 64
max memory size         (kbytes, -m) unlimited
open files                      (-n) 32768
pipe size            (512 bytes, -p) 8
POSIX message queues     (bytes, -q) 819200
real-time priority              (-r) 0
stack size              (kbytes, -s) 2048
cpu time               (seconds, -t) unlimited
max user processes              (-u) 32768
virtual memory          (kbytes, -v) unlimited
file locks                      (-x) unlimited

Server is physical, not virtual, but I dont have the same issue with
virtual freeswitch.

Here is the "status" before the session limit:

freeswitch at internal> status
UP 0 years, 0 days, 0 hours, 0 minutes, 56 seconds, 137 milliseconds, 603
microseconds
FreeSWITCH (Version 1.6.5 git 70b8c17 2015-11-20 20:57:50Z 64bit) is ready
994 session(s) since startup
994 session(s) - peak 994, last 5min 994
40 session(s) per Sec out of max 200, peak 41, last 5min 41
10000 session(s) max
min idle cpu 10.00/96.77
Current Stack Size/Max 2048K/2048K

freeswitch at internal> status
UP 0 years, 0 days, 0 hours, 0 minutes, 56 seconds, 370 milliseconds, 877
microseconds
FreeSWITCH (Version 1.6.5 git 70b8c17 2015-11-20 20:57:50Z 64bit) is ready
1003 session(s) since startup
1003 session(s) - peak 1003, last 5min 1003
40 session(s) per Sec out of max 200, peak 41, last 5min 41
993 session(s) max
min idle cpu 10.00/96.77
Current Stack Size/Max 2048K/2048K

freeswitch at internal> 2015-12-14 15:37:37.436968 [CRIT]
switch_core_session.c:1781 Thread Failure!
2015-12-14 15:37:37.436968 [CRIT] switch_core_session.c:1737 LUKE: I'm hit,
but not bad.
2015-12-14 15:37:37.436968 [CRIT] switch_core_session.c:1738 LUKE'S VOICE:
Artoo, see what you can do with it. Hang on back there....
Green laserfire moves past the beeping little robot as his head turns.
After a few beeps and a twist of his mechanical arm,
Artoo reduces the max sessions to 993 thus, saving the switch from certain
doom.

Any help with that? Really strange error...
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