Subj : pthread_create hangs
To   : comp.programming.threads
From : gg
Date : Mon Apr 11 2005 05:57 pm

Hi,

I'm developping a multi-thread application on debian sarge, kernel 2.4.28.
When I do heavy-load tests, pthread_create sometimes hangs and 
__pthread_manager thread takes all CPU (R status) :
top :
   PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
  6909 vocal     16   0 17404  16m  15m R 18.4  3.4   0:53.32 cvfmon

__pthread_manager thread :
(gdb) bt
#0  0x4054385a in poll () from /lib/libc.so.6
#1  0x40429b50 in __pthread_manager () from /lib/libpthread.so.0
#2  0x4054c69a in clone () from /lib/libc.so.6

pthread_create thread :

#0  0x4042c604 in __pthread_sigsuspend () from /lib/libpthread.so.0
#1  0x4042c3c8 in __pthread_wait_for_restart_signal () from 
/lib/libpthread.so.0
#2  0x4042bc42 in pthread_create@@GLIBC_2.1 () from /lib/libpthread.so.0
#3  0x0805abb2 in cvfmon_pthread_create (id=0x80959f0, bool_joinable=1, 
init=0xfffffffc, arg=0xfffffffc, fct_appelante=0x808746c "babySitter") 
at commun.c:1653
#4  0x08061540 in babySitter () at canal.c:2490
#5  0x40429e51 in pthread_start_thread () from /lib/libpthread.so.0
#6  0x4054c69a in clone () from /lib/libc.so.6

I haven't been able to make simpler test programs that reproduce this 
problem.
Any idea?

Thanx in advance.

Regards,

.