[gecode-users] Multiple thread lock error
Chris Mears
chris.mears at monash.edu
Thu Sep 23 07:35:27 CEST 2010
> Could you give us some details on the machine (processor(s), how many cores, hyperthreading)?
/proc/cpuinfo says "Intel(R) Core(TM)2 Duo CPU E8600 @ 3.33GHz",
which I think means 2 cores with no hyperthreading.
I did some more investigation (all with Gecode 3.4.0). With 1 thread
there are no errors. With 2 threads I sometimes get "terminate called
after throwing an instance of 'Gecode::OperatingSystemError'", but the
process exits cleanly and doesn't crash. With 3 or more threads, I
get that message and sometimes the "what():
Mutex::acquire[pthread_mutex_lock]: Operating system error" message
accompanied by a crash and core dump. The stack trace from the
crashed program is included below (and after that another crashed
stack trace on a 4x2 core machine with 10 Gecode threads, in case it
helps).
Good luck!
Chris
Stack trace: 2 cores, 3 threads:
Core was generated by `./bibd -threads 3'.
Program terminated with signal 6, Aborted.
#0 0x00007f18b1b3f165 in *__GI_raise (sig=<value optimized out>) at
../nptl/sysdeps/unix/sysv/linux/raise.c:64
64 ../nptl/sysdeps/unix/sysv/linux/raise.c: No such file or directory.
in ../nptl/sysdeps/unix/sysv/linux/raise.c
(gdb) thread apply all bt
Thread 4 (Thread 32706):
#0 __lll_lock_wait_private () at
../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:97
#1 0x00007f18b1b85458 in _L_lock_9590 () from /lib/libc.so.6
#2 0x00007f18b1b83841 in *__GI___libc_free (mem=0x7f18b1e69e40) at
malloc.c:3737
#3 0x00007f18b3baf8ed in Gecode::Space::~Space() () from
/usr/lib/libgecodekernel.so.23
#4 0x00000000004055a3 in ~ScriptBase (this=0x7f18b1e69e40,
__in_chrg=<value optimized out>) at ./gecode/driver.hh:525
#5 ~BIBD (this=0x7f18b1e69e40, __in_chrg=<value optimized out>) at
examples/bibd.cpp:96
#6 0x00007f18b51342f6 in ?? () from /usr/lib/libgecodesearch.so.23
#7 0x00007f18b5139453 in ?? () from /usr/lib/libgecodesearch.so.23
#8 0x00007f18b39a76e4 in Gecode::Support::Thread::Run::exec() () from
/usr/lib/libgecodesupport.so.23
#9 0x00007f18b39a78c9 in ?? () from /usr/lib/libgecodesupport.so.23
#10 0x00007f18b26208ba in start_thread (arg=<value optimized out>) at
pthread_create.c:300
#11 0x00007f18b1bdc02d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()
Current language: auto
The current source language is "auto; currently c".
Thread 3 (Thread 32705):
#0 __lll_lock_wait_private () at
../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:97
#1 0x00007f18b1b85458 in _L_lock_9590 () from /lib/libc.so.6
#2 0x00007f18b1b83841 in *__GI___libc_free (mem=0x7f18b1e69e40) at
malloc.c:3737
#3 0x00007f18b295a300 in qUnregisterResourceData(int, unsigned char
const*, unsigned char const*, unsigned char const*) () from
/usr/lib/libQtCore.so.4
#4 0x00007f18b336d223 in ?? () from /usr/lib/libQtGui.so.4
#5 0x00007f18b1b43965 in __cxa_finalize (d=0x7f18b399fe80) at cxa_finalize.c:56
#6 0x00007f18b2eb0526 in ?? () from /usr/lib/libQtGui.so.4
#7 0x000000000000002b in ?? ()
#8 0x0000000000000000 in ?? ()
Current language: auto
The current source language is "auto; currently asm".
Thread 2 (Thread 32708):
#0 0x00007f18b1bd4cea in __brk (addr=0x246d000) at
../sysdeps/unix/sysv/linux/x86_64/brk.c:32
#1 0x00007f18b1bd4d9d in *__GI___sbrk (increment=-589824) at sbrk.c:54
#2 0x00007f18b1b85789 in *__GI___default_morecore
(increment=38195200) at morecore.c:49
#3 0x00007f18b1b7e71a in sYSTRIm (pad=<value optimized out>,
av=0x7f18b1e69e40) at malloc.c:3491
#4 0x00007f18b1b8384c in *__GI___libc_free (mem=<value optimized
out>) at malloc.c:3739
#5 0x00007f18b3baf837 in Gecode::Space::~Space() () from
/usr/lib/libgecodekernel.so.23
#6 0x00000000004055a3 in ~ScriptBase (this=0x246d000,
__in_chrg=<value optimized out>) at ./gecode/driver.hh:525
#7 ~BIBD (this=0x246d000, __in_chrg=<value optimized out>) at
examples/bibd.cpp:96
#8 0x00007f18b51342f6 in ?? () from /usr/lib/libgecodesearch.so.23
#9 0x00007f18b5139453 in ?? () from /usr/lib/libgecodesearch.so.23
#10 0x00007f18b39a76e4 in Gecode::Support::Thread::Run::exec() () from
/usr/lib/libgecodesupport.so.23
#11 0x00007f18b39a78c9 in ?? () from /usr/lib/libgecodesupport.so.23
#12 0x00007f18b26208ba in start_thread (arg=<value optimized out>) at
pthread_create.c:300
#13 0x00007f18b1bdc02d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:112
---Type <return> to continue, or q <return> to quit---
#14 0x0000000000000000 in ?? ()
Thread 1 (Thread 32707):
#0 0x00007f18b1b3f165 in *__GI_raise (sig=<value optimized out>) at
../nptl/sysdeps/unix/sysv/linux/raise.c:64
#1 0x00007f18b1b41f70 in *__GI_abort () at abort.c:92
#2 0x00007f18b23d2dc5 in __gnu_cxx::__verbose_terminate_handler() ()
from /usr/lib/libstdc++.so.6
#3 0x00007f18b23d1166 in ?? () from /usr/lib/libstdc++.so.6
#4 0x00007f18b23d1193 in std::terminate() () from /usr/lib/libstdc++.so.6
#5 0x00007f18b23d128e in __cxa_throw () from /usr/lib/libstdc++.so.6
#6 0x00007f18b39a778c in Gecode::Support::Thread::Run::exec() () from
/usr/lib/libgecodesupport.so.23
#7 0x00007f18b39a78c9 in ?? () from /usr/lib/libgecodesupport.so.23
#8 0x00007f18b26208ba in start_thread (arg=<value optimized out>) at
pthread_create.c:300
#9 0x00007f18b1bdc02d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()
Current language: auto
The current source language is "auto; currently c".
================================
4 core (x2 via hyperthreading) machine with 10 threads:
Core was generated by `./bibd -threads 8 31 6 1'.
Program terminated with signal 6, Aborted.
[New process 8903]
[New process 8897]
[New process 8898]
[New process 8900]
[New process 8904]
[New process 8896]
[New process 8901]
[New process 8899]
[New process 8902]
#0 0x00007f4870217fb5 in raise () from /lib/libc.so.6
(gdb) thread apply all bt
Thread 9 (process 8902):
#0 0x00007f4870217fb5 in raise () from /lib/libc.so.6
#1 0x00007f4870219bc3 in abort () from /lib/libc.so.6
#2 0x00007f4870cd908f in __gnu_cxx::__verbose_terminate_handler ()
from /usr/lib/libstdc++.so.6
#3 0x00007f4870cd74b6 in ?? () from /usr/lib/libstdc++.so.6
#4 0x00007f4870cd74e3 in std::terminate () from /usr/lib/libstdc++.so.6
#5 0x00007f4870cd75ca in __cxa_throw () from /usr/lib/libstdc++.so.6
#6 0x00007f4870f1e85f in Gecode::Support::Thread::Run::exec (
this=<value optimized out>) at ./gecode/support/thread/pthreads.hpp:64
#7 0x00007f4870f1e969 in Gecode::Support::bootstrap (p=0x22c0)
at gecode/support/thread/pthreads.cpp:47
#8 0x00007f487055e3ba in start_thread () from /lib/libpthread.so.0
#9 0x00007f48702cb02d in clone () from /lib/libc.so.6
#10 0x0000000000000000 in ?? ()
Thread 8 (process 8899):
#0 0x00007f4870217fb5 in raise () from /lib/libc.so.6
#1 0x00007f4870219bc3 in abort () from /lib/libc.so.6
#2 0x00007f4870cd908f in __gnu_cxx::__verbose_terminate_handler ()
---Type <return> to continue, or q <return> to quit---
from /usr/lib/libstdc++.so.6
#3 0x00007f4870cd74b6 in ?? () from /usr/lib/libstdc++.so.6
#4 0x00007f4870cd74e3 in std::terminate () from /usr/lib/libstdc++.so.6
#5 0x00007f4870cd75ca in __cxa_throw () from /usr/lib/libstdc++.so.6
#6 0x00007f4870f1e85f in Gecode::Support::Thread::Run::exec (
this=<value optimized out>) at ./gecode/support/thread/pthreads.hpp:64
#7 0x00007f4870f1e969 in Gecode::Support::bootstrap (p=0x22c0)
at gecode/support/thread/pthreads.cpp:47
#8 0x00007f487055e3ba in start_thread () from /lib/libpthread.so.0
#9 0x00007f48702cb02d in clone () from /lib/libc.so.6
#10 0x0000000000000000 in ?? ()
Thread 7 (process 8901):
#0 0x00007f48705622e9 in pthread_cond_wait@@GLIBC_2.3.2 ()
from /lib/libpthread.so.0
#1 0x00007f4870f1e7d5 in Gecode::Support::Thread::Run::exec (this=0x20d7860)
at ./gecode/support/thread/pthreads.hpp:100
#2 0x00007f4870f1e969 in Gecode::Support::bootstrap (p=0x20d789c)
at gecode/support/thread/pthreads.cpp:47
#3 0x00007f487055e3ba in start_thread () from /lib/libpthread.so.0
#4 0x00007f48702cb02d in clone () from /lib/libc.so.6
---Type <return> to continue, or q <return> to quit---
#5 0x0000000000000000 in ?? ()
Thread 6 (process 8896):
#0 0x00007f487028d0c0 in _exit () from /lib/libc.so.6
#1 0x00007f487021b765 in exit () from /lib/libc.so.6
#2 0x00007f48702035ad in __libc_start_main () from /lib/libc.so.6
#3 0x0000000000403379 in _start () at ../sysdeps/x86_64/elf/start.S:113
Thread 5 (process 8904):
#0 0x00007f4870217fb5 in raise () from /lib/libc.so.6
#1 0x00007f4870219bc3 in abort () from /lib/libc.so.6
#2 0x00007f4870cd908f in __gnu_cxx::__verbose_terminate_handler ()
from /usr/lib/libstdc++.so.6
#3 0x00007f4870cd74b6 in ?? () from /usr/lib/libstdc++.so.6
#4 0x00007f4870cd74e3 in std::terminate () from /usr/lib/libstdc++.so.6
#5 0x00007f4870cd75ca in __cxa_throw () from /usr/lib/libstdc++.so.6
#6 0x00007f4870f1e85f in Gecode::Support::Thread::Run::exec (
this=<value optimized out>) at ./gecode/support/thread/pthreads.hpp:64
#7 0x00007f4870f1e969 in Gecode::Support::bootstrap (p=0x22c0)
at gecode/support/thread/pthreads.cpp:47
#8 0x00007f487055e3ba in start_thread () from /lib/libpthread.so.0
---Type <return> to continue, or q <return> to quit---
#9 0x00007f48702cb02d in clone () from /lib/libc.so.6
#10 0x0000000000000000 in ?? ()
Thread 4 (process 8900):
#0 0x00007f48702c7a47 in madvise () from /lib/libc.so.6
#1 0x00007f487025efb1 in ?? () from /lib/libc.so.6
#2 0x00007f487025f2a6 in free () from /lib/libc.so.6
#3 0x00007f48711276ed in ~Space (this=0x20d3c90)
at ./gecode/support/heap.hpp:330
#4 0x00000000004049f3 in ~BIBD (this=0x7f4860021000) at ./gecode/driver.hh:525
#5 0x00007f4872752286 in ~Worker (this=0x20d4ec0)
at ./gecode/search/parallel/path.hh:190
#6 0x00007f4872757643 in ~Worker (this=0x7f4860021000)
at ./gecode/search/parallel/dfs.hh:49
#7 0x00007f4870f1e776 in Gecode::Support::Thread::Run::exec (this=0x20d7690)
at gecode/support/thread/thread.cpp:59
#8 0x00007f4870f1e969 in Gecode::Support::bootstrap (p=0x7f4860021000)
at gecode/support/thread/pthreads.cpp:47
#9 0x00007f487055e3ba in start_thread () from /lib/libpthread.so.0
#10 0x00007f48702cb02d in clone () from /lib/libc.so.6
#11 0x0000000000000000 in ?? ()
---Type <return> to continue, or q <return> to quit---
Thread 3 (process 8898):
#0 0x00007f48705622e9 in pthread_cond_wait@@GLIBC_2.3.2 ()
from /lib/libpthread.so.0
#1 0x00007f4870f1e7d5 in Gecode::Support::Thread::Run::exec (this=0x20d72f0)
at ./gecode/support/thread/pthreads.hpp:100
#2 0x00007f4870f1e969 in Gecode::Support::bootstrap (p=0x20d732c)
at gecode/support/thread/pthreads.cpp:47
#3 0x00007f487055e3ba in start_thread () from /lib/libpthread.so.0
#4 0x00007f48702cb02d in clone () from /lib/libc.so.6
#5 0x0000000000000000 in ?? ()
Thread 2 (process 8897):
#0 0x00007f4870261808 in malloc () from /lib/libc.so.6
#1 0x00007f4870cd649f in __cxa_allocate_exception ()
from /usr/lib/libstdc++.so.6
#2 0x00007f4870f1e869 in Gecode::Support::Thread::Run::exec (this=0x20d7120)
at ./gecode/support/thread/pthreads.hpp:55
#3 0x00007f4870f1e969 in Gecode::Support::bootstrap (p=0xf8)
at gecode/support/thread/pthreads.cpp:47
#4 0x00007f487055e3ba in start_thread () from /lib/libpthread.so.0
---Type <return> to continue, or q <return> to quit---
#5 0x00007f48702cb02d in clone () from /lib/libc.so.6
#6 0x0000000000000000 in ?? ()
Thread 1 (process 8903):
#0 0x00007f4870217fb5 in raise () from /lib/libc.so.6
#1 0x00007f4870219bc3 in abort () from /lib/libc.so.6
#2 0x00007f4870cd90b4 in __gnu_cxx::__verbose_terminate_handler ()
from /usr/lib/libstdc++.so.6
#3 0x00007f4870cd74b6 in ?? () from /usr/lib/libstdc++.so.6
#4 0x00007f4870cd74e3 in std::terminate () from /usr/lib/libstdc++.so.6
#5 0x00007f4870cd75ca in __cxa_throw () from /usr/lib/libstdc++.so.6
#6 0x00007f4870f1e85f in Gecode::Support::Thread::Run::exec (
this=<value optimized out>) at ./gecode/support/thread/pthreads.hpp:64
#7 0x00007f4870f1e969 in Gecode::Support::bootstrap (p=0x22c0)
at gecode/support/thread/pthreads.cpp:47
#8 0x00007f487055e3ba in start_thread () from /lib/libpthread.so.0
#9 0x00007f48702cb02d in clone () from /lib/libc.so.6
#10 0x0000000000000000 in ?? ()
(gdb)
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