I noticed that freeswitch seems to be using a very large amount of CPU
on my system. Doesn't seem to be hurting anything (other than wasting
system resources), but some of it's threads are probably stuck in a loop
or something.
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
14738 sipxchan 15 0 54960 39m 4596 S 189.2 2.0 16691:17 freeswitch
In threads mode (H), top shows multiple ones using much CPU
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
764 sipxchan 25 0 54864 39m 4596 R 49.3 2.0 4045:07 freeswitch
1172 sipxchan 25 0 54864 39m 4596 R 49.0 2.0 4023:10 freeswitch
23876 sipxchan 25 0 54864 39m 4596 R 34.2 2.0 2839:47 freeswitch
22365 sipxchan 25 0 54864 39m 4596 R 32.9 2.0 2924:20 freeswitch
23720 sipxchan 25 0 54864 39m 4596 R 32.9 2.0 2860:36 freeswitch
27115 root 15 0 2588 1364 804 R 1.3 0.1 0:00.29 top
26906 cstdenis 15 0 10144 1596 1040 S 0.3 0.1 0:00.30 sshd
1 root 15 0 2064 636 548 S 0.0 0.0 0:00.52 init
Here is the back trace of one of them using a lot of CPU (pid 23720 above)
----
# gdb /usr/local/freeswitch/bin/freeswitch 23720
/<snip copyright, etc.>/
Attaching to program: /usr/local/freeswitch/bin/freeswitch, process 23720
warning: process 23720 is a cloned process
/<snip symbol loading>/
Reading symbols from /lib/libpthread.so.0...done.
[Thread debugging using libthread_db enabled]
[New Thread 0xb7f85710 (LWP 14738)]
[New Thread 0xb712ab90 (LWP 23878)]
[New Thread 0xb722db90 (LWP 23876)]
[New Thread 0xb6d39b90 (LWP 23721)]
[New Thread 0xb6f4ab90 (LWP 23720)]
[New Thread 0xb6536b90 (LWP 22367)]
[New Thread 0xb6639b90 (LWP 22365)]
[New Thread 0xb63f6b90 (LWP 1173)]
[New Thread 0xb64f9b90 (LWP 1172)]
[New Thread 0xb6f87b90 (LWP 766)]
[New Thread 0xb708ab90 (LWP 764)]
[New Thread 0xb726ab90 (LWP 15336)]
[New Thread 0xb72a7b90 (LWP 15335)]
[New Thread 0xb72e4b90 (LWP 15334)]
[New Thread 0xb7321b90 (LWP 15333)]
[New Thread 0xb784db90 (LWP 15313)]
[New Thread 0xb78f9b90 (LWP 14769)]
[New Thread 0xb78bcb90 (LWP 14768)]
[New Thread 0xb7936b90 (LWP 14764)]
[New Thread 0xb79d7b90 (LWP 14763)]
[New Thread 0xb7a14b90 (LWP 14761)]
[New Thread 0xb7b17b90 (LWP 14756)]
[New Thread 0xb7b54b90 (LWP 14755)]
[New Thread 0xb7b91b90 (LWP 14754)]
[New Thread 0xb7bceb90 (LWP 14753)]
[New Thread 0xb7f20b90 (LWP 14747)]
Loaded symbols for /lib/libpthread.so.0
/
<snip symbol loading>/
0x00b84519 in __pthread_mutex_unlock_usercnt () from /lib/libpthread.so.0
(gdb) bt
#0 0x00b84519 in __pthread_mutex_unlock_usercnt () from
/lib/libpthread.so.0
#1 0x00b848c0 in pthread_mutex_unlock () from /lib/libpthread.so.0
#2 0x00de0c80 in apr_thread_mutex_unlock (mutex=0xb6b14628) at
locks/unix/thread_mutex.c:121
#3 0x00d640bd in switch_mutex_unlock (lock=0xb6b14628) at
src/switch_apr.c:294
#4 0x00d816dd in switch_core_session_read_frame (session=0xb6b0e020,
frame=0xb6f48ef4, flags=0, stream_id=0) at src/switch_core_io.c:159
#5 0x00dbba26 in switch_ivr_park (session=0xb6b0e020, args=0x0) at
src/switch_ivr.c:697
#6 0x009657ed in socket_function (session=0xb6b0e020, data=0xb6b146d8
"69.31.174.100:8084 async") at mod_event_socket.c:427
#7 0x00d7c544 in switch_core_session_exec (session=0xb6b0e020,
application_interface=0x87fb230, arg=0xb6b146d8 "69.31.174.100:8084
async") at src/switch_core_session.c:1342
#8 0x00d7ca1e in switch_core_session_execute_application
(session=0xb6b0e020, app=0xb6b146d0 "socket", arg=0xb6b146d8
"69.31.174.100:8084 async") at src/switch_core_session.c:1264
#9 0x00d7ec92 in switch_core_session_run (session=0xb6b0e020) at
src/switch_core_state_machine.c:155
#10 0x00d7c005 in switch_core_session_thread (thread=0xb6b144d0,
obj=0xb6b0e020) at src/switch_core_session.c:950
#11 0x00de7006 in dummy_worker (opaque=0xb6b144d0) at
threadproc/unix/thread.c:138
#12 0x00b8149b in start_thread () from /lib/libpthread.so.0
#13 0x00ad842e in clone () from /lib/libc.so.6
A backtrace of another process (22365) is similar
#0 0x00b83303 in pthread_mutex_lock () from /lib/libpthread.so.0
#1 0x00de0cf0 in apr_thread_mutex_lock (mutex=0xb6a39dd0) at
locks/unix/thread_mutex.c:92
#2 0x00d640ed in switch_mutex_lock (lock=0xb6a39dd0) at
src/switch_apr.c:289
#3 0x00d81654 in switch_core_session_read_frame (session=0xb6a337f8,
frame=0xb6637ef4, flags=0, stream_id=0) at src/switch_core_io.c:122
#4 0x00dbba26 in switch_ivr_park (session=0xb6a337f8, args=0x0) at
src/switch_ivr.c:697
#5 0x009657ed in socket_function (session=0xb6a337f8, data=0xb6a39e80
"69.31.174.100:8084 async") at mod_event_socket.c:427
#6 0x00d7c544 in switch_core_session_exec (session=0xb6a337f8,
application_interface=0x87fb230, arg=0xb6a39e80 "69.31.174.100:8084
async") at src/switch_core_session.c:1342
#7 0x00d7ca1e in switch_core_session_execute_application
(session=0xb6a337f8, app=0xb6a39e78 "socket", arg=0xb6a39e80
"69.31.174.100:8084 async") at src/switch_core_session.c:1264
#8 0x00d7ec92 in switch_core_session_run (session=0xb6a337f8) at
src/switch_core_state_machine.c:155
#9 0x00d7c005 in switch_core_session_thread (thread=0xb6a39c78,
obj=0xb6a337f8) at src/switch_core_session.c:950
#10 0x00de7006 in dummy_worker (opaque=0xb6a39c78) at
threadproc/unix/thread.c:138
#11 0x00b8149b in start_thread () from /lib/libpthread.so.0
#12 0x00ad842e in clone () from /lib/libc.so.6
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