[Freeswitch-users] SIP performance tweaking

Tue Jul 8 11:51:09 PDT 2008

Hi,

I am currently doing some characterization testing to figure out the limitations of my freeswitch server. I have tried both with SIPP and by driving SIP calls
between 2 Freeswitch through mod_event_socket. I get similar results both ways and I am suspicious of the results I get.

Basically, whenever I try to launch calls with SIPP at a rate superior than 8 cps, it seems like calls are being stacked. The response time for a call between
the "invite" and the corresponding "200 OK" keeps increasing as long as calls are being made which slows down the processing speed until the average
CPS gets around 8 cps.

My setup is :
1 Dual-Core AMD Opteron(tm) Processor 8216 @ 2.4 GHz
4 GB of RAM
Gigabit NIC
Centos 5
FreeSwitch Version 1.0.trunk (8911M)

I think that my setup is underperforming and that it might be related to some missing configuration tweaks. I already adjusted the ulimit to the
recommended settings in the wiki for maximum performance. I was wondering if there might be something else, that I'm still missing.

Would any of you have an idea of what might be holding back my setup ?

Thanks !

PG

P.S. I gathered a bunch of information that I thought could be useful.

Freeswitch performance settings In switch.conf.xml
    <!--Most channels to allow at once -->
    <param name="max-sessions" value="10000"/>
    <!--Most channels to create per second -->
    <param name="sessions-per-second" value="1000"/>
    <!-- Default Global Log Level - value is one of debug,info,notice,warning,err,crit,alert -->
    <param name="loglevel" value="alert"/>

Here is the SIPP command I used, based on Freeswitch load_test script.
# sipp -sf dft_cap.xml 192.168.100.9 -s 9990 -r 15 -rp 1000 -l 200 -d 10000  -i 192.168.100.200 -mi 192.168.100.200

# cat /proc/cpuinfo

processor       : 0
vendor_id       : AuthenticAMD
cpu family      : 15
model           : 65
model name      : Dual-Core AMD Opteron(tm) Processor 8216
stepping        : 2
cpu MHz         : 2411.121
cache size      : 1024 KB
physical id     : 0
siblings        : 2
core id         : 0
cpu cores       : 2
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt rdtscp lm 3dnowext 3dnow pni cx16 lahf_lm cmp_legacy svm extapic cr8_legacy
bogomips        : 4823.60
TLB size        : 1024 4K pages
clflush size    : 64
cache_alignment : 64
address sizes   : 40 bits physical, 48 bits virtual
power management: ts fid vid ttp tm stc

# cat /proc/meminfo

MemTotal:      4042672 kB
MemFree:        843188 kB
Buffers:        256676 kB
Cached:        2671172 kB
SwapCached:       1092 kB
Active:         777140 kB
Inactive:      2192840 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:      4042672 kB
LowFree:        843188 kB
SwapTotal:     2031608 kB
SwapFree:      2016120 kB
Dirty:               0 kB
Writeback:           0 kB
AnonPages:       41068 kB
Mapped:          26028 kB
Slab:           195536 kB
PageTables:       5672 kB
NFS_Unstable:        0 kB
Bounce:              0 kB
CommitLimit:   4052944 kB
Committed_AS:   153064 kB
VmallocTotal: 34359738367 kB
VmallocUsed:     35492 kB
VmallocChunk: 34359692283 kB
HugePages_Total:     0
HugePages_Free:      0
HugePages_Rsvd:      0
Hugepagesize:     2048 kB

# ulimit -a

core file size          (blocks, -c) 0
data seg size           (kbytes, -d) unlimited
scheduling priority             (-e) 0
file size               (blocks, -f) unlimited
pending signals                 (-i) 40960
max locked memory       (kbytes, -l) 32
max memory size         (kbytes, -m) unlimited
open files                      (-n) 1024
pipe size            (512 bytes, -p) 8
POSIX message queues     (bytes, -q) 819200
real-time priority              (-r) 0
stack size              (kbytes, -s) 10240
cpu time               (seconds, -t) unlimited
max user processes              (-u) 40960
virtual memory          (kbytes, -v) unlimited
file locks                      (-x) unlimited

# top

top - 14:31:16 up 1 day, 58 min,  2 users,  load average: 5.73, 6.83, 5.36
Tasks: 129 total,   1 running, 128 sleeping,   0 stopped,   0 zombie
Cpu(s):  7.0%us,  2.8%sy,  0.0%ni, 50.8%id, 38.8%wa,  0.0%hi,  0.5%si,  0.0%st
Mem:   4042672k total,  3418968k used,   623704k free,   256904k buffers
Swap:  2031608k total,    15488k used,  2016120k free,  2681820k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
 6078 root      18   0  614m 109m 6480 S   19  2.8   3:39.11 freeswitch

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