Dear list, I've been playing with freeswitch for some time (2 months) and the fact is that I'm very pleased with the functionnalities of this software. I'd like to use FS as a SBC handling media and I'm doing some tests with sipp to load the machine but I'm unable to bridge more than 60 calls without seeing the CPU being loaded at 100%. I'm sure something is going wrong with my setup but I'm unable to see what. The test machine has the following specs: Athlon XP 3500+ with 2GB of memory (I know this is not a high end machine :p) Freeswitch:/opt/freeswitch/log# cat /proc/cpuinfo processor : 0 vendor_id : AuthenticAMD cpu family : 15 model : 95 model name : AMD Athlon(tm) 64 Processor 3500+ stepping : 2 cpu MHz : 2199.973 cache size : 512 KB 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 syscall nx mmxext fxsr_opt rdtscp lm 3dnowext 3dnow up rep_good pni cx16 lahf_lm svm extapic cr8_legacy bogomips : 4402.97 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 I installed FS on a fresh debian 64: Linux Freeswitch 2.6.26-1-amd64 #1 SMP Sat Jan 10 17:57:00 UTC 2009 x86_64 GNU/Linux I set the ulimit parameters like those on the website: freeswitch@internal> ... Freeswitch:/opt/free-svn/bin# ulimit -a core file size (blocks, -c) unlimited data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) unlimited max locked memory (kbytes, -l) unlimited max memory size (kbytes, -m) unlimited open files (-n) 999999 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) unlimited real-time priority (-r) 0 stack size (kbytes, -s) 244 cpu time (seconds, -t) unlimited max user processes (-u) unlimited virtual memory (kbytes, -v) unlimited file locks (-x) unlimited My network setup is the following: SIPP machine (10.10.10.1/24)----------------vlan 55 ----------(10.10.10.254/24) FS (10.10.20.254/24)-------------- vlan56 -------------------(10.10.20.100/24) OTHER STOCK FS I launched sipp with: sipp -sn uac_pcap -s 9999 -r 10 -l 80 -d 60000 -mi 10.10.10.1 -i 10.10.10.1 -mp 25000 10.10.10.254:5060 The dialplan on FS is very simple: <?xml version="1.0" encoding="utf-8"?> <!-- http://wiki.freeswitch.org/wiki/Dialplan_XML --> <include> <context name="default"> <extension name="hold_music_bridge"> <condition field="destination_number" expression="^9999$"> <action application="answer"/> <action application="bridge" data="sofia/external/9999@10.10.20.100"/> </condition> </extension> </context> </include> FreeSWITCH Version 1.0.trunk (11560M) Started. Crash Protection [Disabled] Max Sessions[1000] Session Rate[100] SQL [Enabled] The test is very simple: sipp dial 9999 that matches in my FS dialplan and this is bridged to an other FS machine playing music on hold. When I launch "top" I see after 30 to 40 s that FS consumes all the CPU ressources (with a mean of 50-60 % before), with 80 calls. When I set 70 calls, I have to wait 70-80 s before seeing the same issue. Presence is set to false on the 2 profile. I have the same issue with FS 1.0.2 that' s why I tried FS 11560. When I use the FS machine as a router to test the packet per second performance, I'm reaching 100Mbps with 8000pps in each direction (from vlan 55 to vlan56) with less than 12% CPU. So that I don't think there's an issue with the network. Here is an "mpstat -P ALL 1" to show you what's happening suddenly with 70 bridge calls: 12:31:26 CPU %user %nice %sys %iowait %irq %soft %steal %idle intr/s 12:31:27 all 3,00 0,00 3,00 0,00 1,00 4,00 0,00 89,00 6241,00 12:31:27 0 3,00 0,00 3,00 0,00 1,00 4,00 0,00 89,00 6241,00 12:31:27 CPU %user %nice %sys %iowait %irq %soft %steal %idle intr/s 12:31:28 all 14,14 0,00 56,57 0,00 2,02 5,05 0,00 22,22 6035,35 12:31:28 0 14,14 0,00 56,57 0,00 2,02 5,05 0,00 22,22 6035,35 12:31:28 CPU %user %nice %sys %iowait %irq %soft %steal %idle intr/s 12:31:29 all 24,75 0,00 67,33 0,00 0,99 6,93 0,00 0,00 5483,17 12:31:29 0 24,75 0,00 67,33 0,00 0,99 6,93 0,00 0,00 5483,17 The CPU is going from 89% idle to 0% in less than 2 seconds. I know that I don't have to expect too much from this kind of hardware, but it seems strange that the CPU power vanished so suddenly. Thanks a lot for the guys that have read this long mail :p kind regards, rod