zen_buddha

Hi All,

The CPU Usage of my process goes to 100% when I am trying to use the
pthread_cond_wait() in my threads. The same is not occuring at my
SuSE Linux 9.1. But, I am getting this problem only at Redhat Enterprise 3.2

The Kernel I am using in Redhat is : 2.4.21-15.ELsmp
The compiler Version I am using is : gcc version 3.2.3 20030502 (Red Hat Linux 3.2.3-34)

The SuSE Linux Kernel Version is : 2.6.4-52-default
The compiler version in SuSE Linux is : gcc version 3.3.3 (SuSE Linux)

gdb capture for this application is
----------------------------------------------

(gdb) attach 14464
Attaching to process 14464
Reading symbols from /home/xchgusr/bin/xchadapter...done.
Using host libthread_db library "/lib/tls/libthread_db.so.1".
Reading symbols from /lib/tls/libpthread.so.0...done.
[Thread debugging using libthread_db enabled]
[New Thread -1235520704 (LWP 14464)]
[New Thread -1383351376 (LWP 14480)]
[New Thread -1372861520 (LWP 14479)]
[New Thread -1351881808 (LWP 14477)]
[New Thread -1341391952 (LWP 14476)]
[New Thread -1330902096 (LWP 14475)]
[New Thread -1320412240 (LWP 14474)]
[New Thread -1309922384 (LWP 14473)]
[New Thread -1299432528 (LWP 14472)]
[New Thread -1288942672 (LWP 14471)]
[New Thread -1278452816 (LWP 14470)]
[New Thread -1267962960 (LWP 14469)]
[New Thread -1257473104 (LWP 14468)]
[New Thread -1246983248 (LWP 14467)]
[New Thread -1236493392 (LWP 14466)]
Loaded symbols for /lib/tls/libpthread.so.0
Reading symbols from /u01/app/oracle/OraHome_1/lib/libclntsh.so.10.1...done.
Loaded symbols for /u01/app/oracle/OraHome_1/lib/libclntsh.so.10.1
Reading symbols from /home/xchgusr/lib/libbse.so.1.0...done.
Loaded symbols for /home/xchgusr/lib/libbse.so.1.0
Reading symbols from /home/xchgusr/lib/libnse.so.1.0...done.
Loaded symbols for /home/xchgusr/lib/libnse.so.1.0
Reading symbols from /home/xchgusr/lib/libnsefno.so.1.0...done.
Loaded symbols for /home/xchgusr/lib/libnsefno.so.1.0
Reading symbols from /usr/lib/libstdc++.so.5...done.
Loaded symbols for /usr/lib/libstdc++.so.5
Reading symbols from /lib/tls/libm.so.6...done.
Loaded symbols for /lib/tls/libm.so.6
Reading symbols from /lib/libgcc_s.so.1...done.
Loaded symbols for /lib/libgcc_s.so.1
Reading symbols from /lib/tls/libc.so.6...done.
Loaded symbols for /lib/tls/libc.so.6
Reading symbols from /lib/ld-linux.so.2...done.
Loaded symbols for /lib/ld-linux.so.2
Reading symbols from /u01/app/oracle/OraHome_1/lib/libnnz10.so...done.
Loaded symbols for /u01/app/oracle/OraHome_1/lib/libnnz10.so
Reading symbols from /lib/libdl.so.2...done.
Loaded symbols for /lib/libdl.so.2
Reading symbols from /lib/libnsl.so.1...done.
Loaded symbols for /lib/libnsl.so.1
Reading symbols from /lib/libnss_files.so.2...done.
Loaded symbols for /lib/libnss_files.so.2
0xb75c9c18 in pthread_join () from /lib/tls/libpthread.so.0
(gdb) info threads
15 Thread -1236493392 (LWP 14466) 0xb75cb1fb in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/libpthread.so.0
14 Thread -1246983248 (LWP 14467) 0xb75cb1fb in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/libpthread.so.0
13 Thread -1257473104 (LWP 14468) 0xb75cb1fb in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/libpthread.so.0
12 Thread -1267962960 (LWP 14469) 0xb75cb1fb in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/libpthread.so.0
11 Thread -1278452816 (LWP 14470) 0xb75cb1fb in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/libpthread.so.0
10 Thread -1288942672 (LWP 14471) 0xb75cb1fb in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/libpthread.so.0
9 Thread -1299432528 (LWP 14472) 0xb75cb1fb in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/libpthread.so.0
8 Thread -1309922384 (LWP 14473) 0xb75cb1fb in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/libpthread.so.0
7 Thread -1320412240 (LWP 14474) 0xb75cb1fb in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/libpthread.so.0
6 Thread -1330902096 (LWP 14475) 0xb75cd6b4 in __pthread_disable_asynccancel () from /lib/tls/libpthread.so.0
5 Thread -1341391952 (LWP 14476) 0xb75cd6b4 in __pthread_disable_asynccancel () from /lib/tls/libpthread.so.0
4 Thread -1351881808 (LWP 14477) 0xb75cd6b4 in __pthread_disable_asynccancel () from /lib/tls/libpthread.so.0
3 Thread -1372861520 (LWP 14479) 0xb75cdb3e in accept () from /lib/tls/libpthread.so.0
2 Thread -1383351376 (LWP 14480) 0xb68da337 in ___newselect_nocancel () from /lib/tls/libc.so.6
1 Thread -1235520704 (LWP 14464) 0xb75c9c18 in pthread_join () from /lib/tls/libpthread.so.0
(gdb)

Sample program using pthread_cond_wait() is not using CPU Usage.
Note: I measured CPU Usage through top utility.

If anybody overcome this kind of problem, please help me to solve
this problem.

Thank you....

ivan

Don't know what's the problem but welcome to the forums.