[mpich-discuss] Deadlock when in MPI_THREAD_MULTIPLE within the MPI_Comm_disconnect()

Thu Jul 17 12:04:42 CDT 2008

Hi All on the list,

I guess to have found a dead lock in the last MPICH2 v1.0.7, the scenery is the following:

thread 1 is the main user's application;
threads 2/3/4 are using the MPI functions for dynamically spawn a slave in a choosed node
        exchange some data, waiting the slave termination and finally they calls the 
        MPI_Comm_disconnect() for releasing the master/slave intercommunicator;
thread 5 is the dispatcher of the 2/3/4 threads it waits their termination;

So, looking at the calltrace of the thread2 the MPI is waiting that the poll(), which was called by MPIDU_Sock_wait(), 
returns, here we are within the MPI_Comm_disconnect(). The call trace of the thread3/4 is also in the 
MPI_Comm_disconnect() but it's waiting in a condition called by the MPIDI_CH3I_Progress(). So basically all the
three threads are stuck in the MPI_Comm_disconnect()! 

Does anyone have an idea what's going on here?

Thanks in advance.
Roberto Fichera.

(gdb) thread 1
[Switching to thread 1 (Thread 46912533127120 (LWP 30857))]#0  0x00000033ca40a8f9 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
(gdb) bt
#0  0x00000033ca40a8f9 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00002aaaab0b08a2 in Cond_wait () from /home/simone/.HRI/Proxy/HRI/Libraries/MThreads/1.1/lib/linux-x86_64-gcc-glibc2.3.4/libMThreads.so.1.1
#2  0x00002aaaabb8a787 in MTQueue_popWait (self=0x636b70, userClass=0x0, microsecs=0) at MTQueue.c:177
#3  0x000000000040642b in main (argc=1, argv=0x7fff4e7909f8) at ackley_master.cpp:265

//=============================================================================

(gdb) thread 2
[Switching to thread 2 (Thread 1094719824 (LWP 1279))]#0  0x00000033c94cbd66 in poll () from /lib64/libc.so.6
(gdb) bt
#0  0x00000033c94cbd66 in poll () from /lib64/libc.so.6
#1  0x00002aaaab5a3d2f in MPIDU_Sock_wait () from /home/roberto/.HRI/Proxy/HRI/External/mpich2/1.0.7/lib/linux-x86_64-gcc-glibc2.3.4/libmpich.so.1.1
#2  0x00002aaaab52bdc7 in MPIDI_CH3I_Progress () from /home/roberto/.HRI/Proxy/HRI/External/mpich2/1.0.7/lib/linux-x86_64-gcc-glibc2.3.4/libmpich.so.1.1
#3  0x00002aaaab5301a7 in MPIDI_CH3U_VC_WaitForClose () from /home/roberto/.HRI/Proxy/HRI/External/mpich2/1.0.7/lib/linux-x86_64-gcc-glibc2.3.4/libmpich.so.1.1
#4  0x00002aaaab56f162 in MPID_Comm_disconnect () from /home/roberto/.HRI/Proxy/HRI/External/mpich2/1.0.7/lib/linux-x86_64-gcc-glibc2.3.4/libmpich.so.1.1
#5  0x00002aaaab5417ec in PMPI_Comm_disconnect () from /home/roberto/.HRI/Proxy/HRI/External/mpich2/1.0.7/lib/linux-x86_64-gcc-glibc2.3.4/libmpich.so.1.1
#6  0x00002aaaabda5a99 in ParallelWorker_destroySlave (self=0x6358e0) at ParallelWorker.c:819
#7  0x00002aaaabda6223 in ParallelWorker_threadMain (arg=0x6358e0) at ParallelWorker.c:515
#8  0x00000033ca406407 in start_thread () from /lib64/libpthread.so.0
#9  0x00000033c94d4b0d in clone () from /lib64/libc.so.6

//=============================================================================

(gdb) thread 3
[Switching to thread 3 (Thread 1084229968 (LWP 1278))]#0  0x00000033ca40a8f9 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
(gdb) bt
#0  0x00000033ca40a8f9 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00002aaaab52bec7 in MPIDI_CH3I_Progress () from /home/roberto/.HRI/Proxy/HRI/External/mpich2/1.0.7/lib/linux-x86_64-gcc-glibc2.3.4/libmpich.so.1.1
#2  0x00002aaaab5301a7 in MPIDI_CH3U_VC_WaitForClose () from /home/roberto/.HRI/Proxy/HRI/External/mpich2/1.0.7/lib/linux-x86_64-gcc-glibc2.3.4/libmpich.so.1.1
#3  0x00002aaaab56f162 in MPID_Comm_disconnect () from /home/roberto/.HRI/Proxy/HRI/External/mpich2/1.0.7/lib/linux-x86_64-gcc-glibc2.3.4/libmpich.so.1.1
#4  0x00002aaaab5417ec in PMPI_Comm_disconnect () from /home/roberto/.HRI/Proxy/HRI/External/mpich2/1.0.7/lib/linux-x86_64-gcc-glibc2.3.4/libmpich.so.1.1
#5  0x00002aaaabda5a99 in ParallelWorker_destroySlave (self=0x634d20) at ParallelWorker.c:819
#6  0x00002aaaabda6223 in ParallelWorker_threadMain (arg=0x634d20) at ParallelWorker.c:515
#7  0x00000033ca406407 in start_thread () from /lib64/libpthread.so.0
#8  0x00000033c94d4b0d in clone () from /lib64/libc.so.6

//=============================================================================

(gdb) thread 4
[Switching to thread 4 (Thread 1115699536 (LWP 1277))]#0  0x00000033ca40a8f9 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
(gdb) bt
#0  0x00000033ca40a8f9 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00002aaaab52bec7 in MPIDI_CH3I_Progress () from /home/roberto/.HRI/Proxy/HRI/External/mpich2/1.0.7/lib/linux-x86_64-gcc-glibc2.3.4/libmpich.so.1.1
#2  0x00002aaaab5301a7 in MPIDI_CH3U_VC_WaitForClose () from /home/roberto/.HRI/Proxy/HRI/External/mpich2/1.0.7/lib/linux-x86_64-gcc-glibc2.3.4/libmpich.so.1.1
#3  0x00002aaaab56f162 in MPID_Comm_disconnect () from /home/roberto/.HRI/Proxy/HRI/External/mpich2/1.0.7/lib/linux-x86_64-gcc-glibc2.3.4/libmpich.so.1.1
#4  0x00002aaaab5417ec in PMPI_Comm_disconnect () from /home/roberto/.HRI/Proxy/HRI/External/mpich2/1.0.7/lib/linux-x86_64-gcc-glibc2.3.4/libmpich.so.1.1
#5  0x00002aaaabda5a99 in ParallelWorker_destroySlave (self=0x6341a0) at ParallelWorker.c:819
#6  0x00002aaaabda6223 in ParallelWorker_threadMain (arg=0x6341a0) at ParallelWorker.c:515
#7  0x00000033ca406407 in start_thread () from /lib64/libpthread.so.0
#8  0x00000033c94d4b0d in clone () from /lib64/libc.so.6

//=============================================================================

(gdb) thread 5
[Switching to thread 5 (Thread 1105209680 (LWP 1276))]#0  0x00000033ca40a8f9 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
(gdb) bt
#0  0x00000033ca40a8f9 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00002aaaab0b08a2 in Cond_wait () from /home/roberto/.HRI/Proxy/HRI/Libraries/MThreads/1.1/lib/linux-x86_64-gcc-glibc2.3.4/libMThreads.so.1.1
#2  0x00002aaaabd9e775 in Parallel_threadMain (arg=0x636830) at Parallel.c:645
#3  0x00000033ca406407 in start_thread () from /lib64/libpthread.so.0
#4  0x00000033c94d4b0d in clone () from /lib64/libc.so.6

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mcs.anl.gov/pipermail/mpich-discuss/attachments/20080717/26e927d9/attachment.htm>