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