Hi all,

I'm testing Freeswitch using ESL interface, recording and SIP UDP Calls at a rate of around 5 CPS.
Freeswitch receives ESL requests and proceeds to send call to PSTN Emulator, once call is answered I start recording. I have noticed around 40% CPU utilization when recording is not enabled and ~60%+ CPU when recording is.
I created/mount a volume specifically to store the recording files. (ext4)

Server specifications:

EC2 server (t2.medium) 2 vCPUs, 2.5 GHz, Intel Xeon Family, 4 GiB memory.
FreeSWITCH (Version 1.6.9 -16-d574870 64bit)

I followed instructions at: https://wiki.freeswitch.org/wiki/Performance_testing_and_configurations

[Questions]  

a) How to strip down Freeswitch and remove non-used modules? 

Features I need:

esl, recording, loopback, bridge, sip, spandsp, cdr_csv.

My modules: 

fs_cli -x "show modules"

http://pastebin.com/BQSxzFDE

b) I would like to see which module is using X/Y amount of CPU cycles/memory in Freeswitch is it possible?.


fs_cli -x 'show status'

UP 0 years, 0 days, 1 hour, 2 minutes, 15 seconds, 541 milliseconds, 286 microseconds

FreeSWITCH (Version 1.6.9 -16-d574870 64bit) is ready

18192 session(s) since startup

90 session(s) - peak 93, last 5min 92 

5 session(s) per Sec out of max 30, peak 7, last 5min 6 

1000 session(s) max

min idle cpu 0.00/75.57

Current Stack Size/Max 240K/8192K


A sample image is below: 40% steady (no recording) a peak when I enabled recording.

Inline image 1


# top

top - 03:25:16 up 22:42,  1 user,  load average: 3.88, 5.74, 10.39

Tasks:  68 total,   1 running,  67 sleeping,   0 stopped,   0 zombie

%Cpu(s): 11.0 us,  2.3 sy,  0.0 ni, 85.7 id,  0.0 wa,  0.0 hi,  0.7 si,  0.4 st

KiB Mem:   4057584 total,   865964 used,  3191620 free,   147088 buffers

KiB Swap:  1048572 total,        0 used,  1048572 free.   213572 cached Mem


  PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND                                                                                                                                

26217 freeswi+  -2 -10 1427444 302584  16904 S  65.9  7.5  28:47.49 freeswitch