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[Jean-François SMIGIELSKI]

Hello list!

My problem: when I receive an INVITE, after processing and forwarding, the UDP process starts to loop (it hangs and consumes a lot of CPU time) . A call to strace on this process shows it loops on sched_yield, just after a call to udp_send. Because this function was only used in the locking features, I compiled again with pthread_mutex locks and it seems the problem disappears.

This happens only for INVITE requests (I don't know why) and it is systematic with openser 1.1.0 on a linux 2.6.18 on a bi-Xeon. It was compiled with the default options (fast_lock) for this architecture. You can find below the command line at compile time.
The problem does not happen with the same openser 1.1.0 (binary) on linux 2.6.11, 2.6.12, 2.6.15 and 2.6.16 for various architectures.

-fPIC -DPIC -g -O9 -funroll-loops -Wcast-align -Wall -minline-all-stringops -falign-loops -mtune=athlon    -DNAME='"openser"' -DVERSION='"1.1.0-notls"' -DARCH='"i386"' -DOS='"linux"' -DCOMPILER='"gcc 3.4.4"' -D__CPU_i386 -D__OS_linux -D__SMP_no -DCFG_DIR='"/usr/local/etc/openser/"' -DPKG_MALLOC -DSHM_MEM  -DSHM_MMAP -DUSE_IPV6 -DUSE_MCAST -DUSE_TCP -DDISABLE_NAGLE -DHAVE_RESOLV_RES -DF_MALLOC -DSTATISTICS  -DHAVE_GETHOSTBYNAME2 -DHAVE_UNION_SEMUN -DHAVE_SCHED_YIELD -DHAVE_MSG_NOSIGNAL -DHAVE_MSGHDR_MSG_CONTROL -DHAVE_ALLOCA_H -DHAVE_TIMEGM -DUSE_PTHREAD_MUTEX   -DHAVE_EPOLL -DHAVE_SIGIO_RT -DHAVE_SELECT

[root at yellow /tmp]# uname -a
Linux yellow 2.6.18 #1 SMP PREEMPT Mon Nov 27 17:21:08 CET 2006 i686 pentium4 i386 GNU/Linux

I hope it helps, Thanks a lot!

JF Smigielski.


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