Yeah - even in a singleton, you are still connecting back to the local daemon
On Dec 20, 2013, at 4:20 PM, Paul Hargrove <phhargr...@lbl.gov> wrote: > Ralph, > > Does some part of the "timer that is firing to indicate a failed connection > attempt" theory explain the case of singletons hanging? I'm just bringing > this up in case you might be looking in the wrong direction. > > -Paul > > > On Fri, Dec 20, 2013 at 4:15 PM, Ralph Castain <r...@open-mpi.org> wrote: > This is the same problem Jeff and I are looking at on Solaris - it requires a > slow machine to make it appear. I'm investigating and think I know where the > issue might lie (a timer that is firing to indicate a failed connection > attempt and causing a race condition) > > > On Dec 20, 2013, at 4:02 PM, Paul Hargrove <phhargr...@lbl.gov> wrote: > >> FWIW: >> I've confirmed that this is REGRESSION relative to 1.7.2, which works fine >> on OpenBSD-5 >> >> I could not build 1.7.3 due to some of issues fixed for 1.7.4rc in the past >> 24 hours. >> I am going to try back-porting the fix(es) to see if 1.7.3 works or not . >> >> -Paul >> >> >> On Fri, Dec 20, 2013 at 3:16 PM, Paul Hargrove <phhargr...@lbl.gov> wrote: >> Below is the backtrace again, this time configured w/ --enable-debug and for >> all threads. >> -Paul >> >> Thread 2 (thread 1021110): >> #0 0x00001bc0ef6c5e3a in nanosleep () at <stdin>:2 >> #1 0x00001bc0f317c2d4 in nanosleep (rqtp=0x7f7ffffbc900, rmtp=0x0) >> at /usr/src/lib/librthread/rthread_cancel.c:274 >> #2 0x00001bc0f2cd4621 in orte_routed_base_register_sync (setup=true) >> at >> /home/phargrov/OMPI/openmpi-1.7-latest-openbsd5-amd64/openmpi-1.7-latest/orte/mca/routed/base/routed_base_fns.c:344 >> #3 0x00001bc0efc5d602 in init_routes (job=3563782145, ndat=0x0) >> at >> /home/phargrov/OMPI/openmpi-1.7-latest-openbsd5-amd64/openmpi-1.7-latest/orte/mca/routed/binomial/routed_binomial.c:705 >> #4 0x00001bc0f2c9c832 in orte_ess_base_app_setup (db_restrict_local=true) >> at >> /home/phargrov/OMPI/openmpi-1.7-latest-openbsd5-amd64/openmpi-1.7-latest/orte/mca/ess/base/ess_base_std_app.c:233 >> #5 0x00001bc0f39ea9ec in rte_init () >> at >> /home/phargrov/OMPI/openmpi-1.7-latest-openbsd5-amd64/openmpi-1.7-latest/orte/mca/ess/env/ess_env_module.c:146 >> #6 0x00001bc0f2c68764 in orte_init (pargc=0x0, pargv=0x0, flags=32) >> at >> /home/phargrov/OMPI/openmpi-1.7-latest-openbsd5-amd64/openmpi-1.7-latest/orte/runtime/orte_init.c:158 >> #7 0x00001bc0f75061c5 in ompi_mpi_init (argc=1, argv=0x7f7ffffbced0, >> requested=0, provided=0x7f7ffffbce38) >> at >> /home/phargrov/OMPI/openmpi-1.7-latest-openbsd5-amd64/openmpi-1.7-latest/ompi/runtime/ompi_mpi_init.c:451 >> #8 0x00001bc0f7544b96 in PMPI_Init (argc=0x7f7ffffbce6c, >> argv=0x7f7ffffbce60) at pinit.c:84 >> #9 0x00001bbeec701093 in main (argc=1, argv=0x7f7ffffbced0) at ring_c.c:19 >> Current language: auto; currently asm >> >> Thread 1 (thread 1023703): >> #0 0x00001bc0ef6d68fa in poll () at <stdin>:2 >> #1 0x00001bc0f317c0fd in poll (fds=0x1bc0f9482d00, nfds=2, timeout=-1) >> at /usr/src/lib/librthread/rthread_cancel.c:331 >> #2 0x00001bc0eebf47a8 in poll_dispatch (base=0x1bc0f5987400, tv=0x0) >> at >> /home/phargrov/OMPI/openmpi-1.7-latest-openbsd5-amd64/openmpi-1.7-latest/opal/mca/event/libevent2021/libevent/poll.c:165 >> #3 0x00001bc0eebe8314 in opal_libevent2021_event_base_loop >> (base=0x1bc0f5987400, flags=1) >> at >> /home/phargrov/OMPI/openmpi-1.7-latest-openbsd5-amd64/openmpi-1.7-latest/opal/mca/event/libevent2021/libevent/event.c:1631 >> #4 0x00001bc0f2c68855 in orte_progress_thread_engine (obj=0x1bc0f310e160) >> at >> /home/phargrov/OMPI/openmpi-1.7-latest-openbsd5-amd64/openmpi-1.7-latest/orte/runtime/orte_init.c:180 >> #5 0x00001bc0f317911e in _rthread_start (v=Variable "v" is not available. >> ) at /usr/src/lib/librthread/rthread.c:122 >> #6 0x00001bc0ef6c003b in __tfork_thread () at >> /usr/src/lib/libc/arch/amd64/sys/tfork_thread.S:75 >> Cannot access memory at address 0x1bc0f857c000 >> >> >> >> On Fri, Dec 20, 2013 at 2:48 PM, Paul Hargrove <phhargr...@lbl.gov> wrote: >> Brian, >> >> Of course, I should have thought of that myself. >> See below for backtrace from a singleton run. >> >> I'm starting an --enable-debug build to maybe get some line number info too. >> >> -Paul >> >> (gdb) where >> #0 0x00000406457a9e3a in nanosleep () at <stdin>:2 >> #1 0x000004063947e2d4 in nanosleep (rqtp=0x7f7ffffeca30, rmtp=0x0) >> at /usr/src/lib/librthread/rthread_cancel.c:274 >> #2 0x0000040644a5a89b in orte_routed_base_register_sync () >> from >> /home/phargrov/OMPI/openmpi-1.7-latest-openbsd5-amd64/INST/lib/libopen-rte.so.7.0 >> #3 0x00000406490d943c in init_routes () >> from >> /home/phargrov/OMPI/openmpi-1.7-latest-openbsd5-amd64/INST/lib/openmpi/mca_routed_binomial.so >> #4 0x0000040644a3c37f in orte_ess_base_app_setup () >> from >> /home/phargrov/OMPI/openmpi-1.7-latest-openbsd5-amd64/INST/lib/libopen-rte.so.7.0 >> #5 0x000004063eb1797d in rte_init () >> from >> /home/phargrov/OMPI/openmpi-1.7-latest-openbsd5-amd64/INST/lib/openmpi/mca_ess_env.so >> #6 0x0000040644a1a3fe in orte_init () >> from >> /home/phargrov/OMPI/openmpi-1.7-latest-openbsd5-amd64/INST/lib/libopen-rte.so.7.0 >> #7 0x00000406482c7976 in ompi_mpi_init () >> from >> /home/phargrov/OMPI/openmpi-1.7-latest-openbsd5-amd64/INST/lib/libmpi.so.4.0 >> #8 0x00000406482eac92 in PMPI_Init () >> from >> /home/phargrov/OMPI/openmpi-1.7-latest-openbsd5-amd64/INST/lib/libmpi.so.4.0 >> #9 0x0000040438c01093 in main (argc=1, argv=0x7f7ffffece60) at ring_c.c:19 >> Current language: auto; currently asm >> >> >> >> On Fri, Dec 20, 2013 at 2:38 PM, Barrett, Brian W <bwba...@sandia.gov> wrote: >> Paul - >> >> Any chance you could grab a stack trace from the mpi app? That's probably >> the fastest next step >> >> Brian >> >> >> >> Sent with Good (www.good.com) >> >> >> -----Original Message----- >> From: Paul Hargrove [phhargr...@lbl.gov] >> Sent: Friday, December 20, 2013 03:33 PM Mountain Standard Time >> To: Open MPI Developers >> Subject: [EXTERNAL] [OMPI devel] 1.7.4rc2r30031 - OpenBSD-5 mpirun hangs >> >> With plenty of help from Jeff and Ralph's bug fixes in the past 24 hours, I >> can now build OMPI for NetBSD. However, running even a simple example fails: >> >> Having set PATH and LD_LIBARY_PATH: >> $ mpirun -np 1 examples/ring_c >> just hangs >> >> Output from "top" shows idle procs: >> PID USERNAME PRI NICE SIZE RES STATE WAIT TIME CPU COMMAND >> 31841 phargrov 10 0 2140K 3960K sleep/1 nanosle 0:00 0.00% ring_c >> 13490 phargrov 2 0 2540K 4892K sleep/1 poll 0:00 0.00% orterun >> >> Distrusting then env vars and relying instead on the auto-prefix behavior: >> $ /home/phargrov/OMPI/openmpi-1.7-latest-openbsd5-amd64/INST/bin/mpirun -np >> 1 examples/ring_c >> also hangs >> >> Not sure exactly what to infer from this, but a "bogus" btl doesn't produce >> any complaint, which may indicate how far startup got: >> $ mpirun -mca btl bogus -np 1 examples/ring_c >> Still hangs, and no complaint about the blt selection >> >> All three cases above are singleton (-np 1) runs, but the behavior with "-np >> 2" is the same. >> >> This does NOT appear to be an ORTE problem: >> -bash-4.2$ orterun -np 1 date >> Fri Dec 20 14:11:42 PST 2013 >> -bash-4.2$ orterun -np 2 date >> Fri Dec 20 14:11:45 PST 2013 >> Fri Dec 20 14:11:45 PST 2013 >> >> Let me know what sort of verbose mca parameters to set and I'll collect the >> info. >> Compressed output of "ompi_info --all" is attached. >> >> -Paul >> >> -- >> Paul H. Hargrove phhargr...@lbl.gov >> Future Technologies Group >> Computer and Data Sciences Department Tel: +1-510-495-2352 >> Lawrence Berkeley National Laboratory Fax: +1-510-486-6900 >> >> _______________________________________________ >> devel mailing list >> de...@open-mpi.org >> http://www.open-mpi.org/mailman/listinfo.cgi/devel >> >> >> >> -- >> Paul H. Hargrove phhargr...@lbl.gov >> Future Technologies Group >> Computer and Data Sciences Department Tel: +1-510-495-2352 >> Lawrence Berkeley National Laboratory Fax: +1-510-486-6900 >> >> >> >> -- >> Paul H. Hargrove phhargr...@lbl.gov >> Future Technologies Group >> Computer and Data Sciences Department Tel: +1-510-495-2352 >> Lawrence Berkeley National Laboratory Fax: +1-510-486-6900 >> >> >> >> -- >> Paul H. Hargrove phhargr...@lbl.gov >> Future Technologies Group >> Computer and Data Sciences Department Tel: +1-510-495-2352 >> Lawrence Berkeley National Laboratory Fax: +1-510-486-6900 >> _______________________________________________ >> devel mailing list >> de...@open-mpi.org >> http://www.open-mpi.org/mailman/listinfo.cgi/devel > > > _______________________________________________ > devel mailing list > de...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/devel > > > > -- > Paul H. Hargrove phhargr...@lbl.gov > Future Technologies Group > Computer and Data Sciences Department Tel: +1-510-495-2352 > Lawrence Berkeley National Laboratory Fax: +1-510-486-6900 > _______________________________________________ > devel mailing list > de...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/devel
