https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88707
Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|x86_64-apple-darwin18 |x86_64-apple-darwin18,
| |*-*-solaris2.11,
| |i586-unknown-freebsd11.2
CC| |ro at gcc dot gnu.org
Host|x86_64-apple-darwin18 |
Summary|Random failures of |Random failures of
|libgomp.c++/task-reduction- |libgomp.c++/task-reduction-
|(8|10).C on |(8|10|11|13).C
|x86_64-apple-darwin18 |
Build|x86_64-apple-darwin18 |
--- Comment #3 from Rainer Orth <ro at gcc dot gnu.org> ---
I'm seeing exactly the same on Solaris (both sparc and x86, 32 and 64-bit), and
there are also FreeBSD reports.
On Solaris, the affected tests
FAIL: libgomp.c++/task-reduction-10.C execution test
FAIL: libgomp.c++/task-reduction-11.C execution test
FAIL: libgomp.c++/task-reduction-13.C execution test
FAIL: libgomp.c++/task-reduction-8.C execution test
usually complete within 10 ms, but every once in a while they hang
indefinitely,
running into the DejaGnu timeout. This even happens on a completely unloaded
machine, running only a single testcase manually. Things seem to get worse
with OMP_NUM_THREADS=8 set.
Seems like a deadlock to me:
Thread 16 (Thread 8 ):
#0 0xfe29aab9 in __lwp_park () from /lib/libc.so.1
#1 0xfe28c1ff in sema_wait_impl () from /lib/libc.so.1
#2 0xfe28c3c3 in sema_wait () from /lib/libc.so.1
#3 0xfe27e967 in sem_wait () from /lib/libc.so.1
#4 0xfe4115bc in gomp_sem_wait (sem=0x8067924) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/sem.c:121
#5 0xfe41174c in gomp_barrier_wait_end (state=8, bar=0x806790c) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.c:92
#6 gomp_barrier_wait_end (bar=0x806790c, state=8) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.c:73
#7 0xfe4117c3 in gomp_barrier_wait (barrier=0x806790c) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.h:85
#8 0xfe40f437 in gomp_barrier_wait_last (bar=0x806790c) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.h:116
#9 gomp_thread_start (xdata=0xfeffd698) at
/vol/gcc/src/hg/trunk/local/libgomp/team.c:111
#10 0xfe29a779 in _thrp_setup () from /lib/libc.so.1
#11 0xfe29aa60 in ?? () from /lib/libc.so.1
#12 0x00000000 in ?? ()
Thread 15 (Thread 7 ):
#0 0xfe29aab9 in __lwp_park () from /lib/libc.so.1
#1 0xfe28c1ff in sema_wait_impl () from /lib/libc.so.1
#2 0xfe28c3c3 in sema_wait () from /lib/libc.so.1
#3 0xfe27e967 in sem_wait () from /lib/libc.so.1
#4 0xfe4115bc in gomp_sem_wait (sem=0x8067924) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/sem.c:121
#5 0xfe41174c in gomp_barrier_wait_end (state=8, bar=0x806790c) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.c:92
#6 gomp_barrier_wait_end (bar=0x806790c, state=8) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.c:73
#7 0xfe4117c3 in gomp_barrier_wait (barrier=0x806790c) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.h:85
#8 0xfe40f437 in gomp_barrier_wait_last (bar=0x806790c) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.h:116
#9 gomp_thread_start (xdata=0xfeffd654) at
/vol/gcc/src/hg/trunk/local/libgomp/team.c:111
#10 0xfe29a779 in _thrp_setup () from /lib/libc.so.1
#11 0xfe29aa60 in ?? () from /lib/libc.so.1
#12 0x00000000 in ?? ()
Thread 14 (Thread 6 ):
#0 0xfe29aab9 in __lwp_park () from /lib/libc.so.1
#1 0xfe28c1ff in sema_wait_impl () from /lib/libc.so.1
#2 0xfe28c3c3 in sema_wait () from /lib/libc.so.1
#3 0xfe27e967 in sem_wait () from /lib/libc.so.1
#4 0xfe4115bc in gomp_sem_wait (sem=0x8067924) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/sem.c:121
#5 0xfe41174c in gomp_barrier_wait_end (state=8, bar=0x806790c) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.c:92
#6 gomp_barrier_wait_end (bar=0x806790c, state=8) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.c:73
#7 0xfe4117c3 in gomp_barrier_wait (barrier=0x806790c) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.h:85
#8 0xfe40f437 in gomp_barrier_wait_last (bar=0x806790c) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.h:116
#9 gomp_thread_start (xdata=0xfeffd610) at
/vol/gcc/src/hg/trunk/local/libgomp/team.c:111
#10 0xfe29a779 in _thrp_setup () from /lib/libc.so.1
#11 0xfe29aa60 in ?? () from /lib/libc.so.1
#12 0x00000000 in ?? ()
Thread 13 (Thread 5 ):
#0 0xfe29aab9 in __lwp_park () from /lib/libc.so.1
#1 0xfe28c1ff in sema_wait_impl () from /lib/libc.so.1
#2 0xfe28c3c3 in sema_wait () from /lib/libc.so.1
#3 0xfe27e967 in sem_wait () from /lib/libc.so.1
#4 0xfe4115bc in gomp_sem_wait (sem=0x8067924) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/sem.c:121
#5 0xfe41174c in gomp_barrier_wait_end (state=8, bar=0x806790c) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.c:92
#6 gomp_barrier_wait_end (bar=0x806790c, state=8) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.c:73
#7 0xfe4117c3 in gomp_barrier_wait (barrier=0x806790c) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.h:85
#8 0xfe40f437 in gomp_barrier_wait_last (bar=0x806790c) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.h:116
#9 gomp_thread_start (xdata=0xfeffd5cc) at
/vol/gcc/src/hg/trunk/local/libgomp/team.c:111
#10 0xfe29a779 in _thrp_setup () from /lib/libc.so.1
#11 0xfe29aa60 in ?? () from /lib/libc.so.1
#12 0x00000000 in ?? ()
Thread 12 (Thread 4 ):
#0 0xfe29aab9 in __lwp_park () from /lib/libc.so.1
#1 0xfe28c1ff in sema_wait_impl () from /lib/libc.so.1
#2 0xfe28c3c3 in sema_wait () from /lib/libc.so.1
#3 0xfe27e967 in sem_wait () from /lib/libc.so.1
#4 0xfe4115bc in gomp_sem_wait (sem=0x8067924) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/sem.c:121
#5 0xfe41174c in gomp_barrier_wait_end (state=8, bar=0x806790c) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.c:92
#6 gomp_barrier_wait_end (bar=0x806790c, state=8) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.c:73
#7 0xfe4117c3 in gomp_barrier_wait (barrier=0x806790c) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.h:85
#8 0xfe40f437 in gomp_barrier_wait_last (bar=0x806790c) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.h:116
#9 gomp_thread_start (xdata=0xfeffd588) at
/vol/gcc/src/hg/trunk/local/libgomp/team.c:111
#10 0xfe29a779 in _thrp_setup () from /lib/libc.so.1
#11 0xfe29aa60 in ?? () from /lib/libc.so.1
#12 0x00000000 in ?? ()
Thread 11 (Thread 3 ):
#0 0xfe29aab9 in __lwp_park () from /lib/libc.so.1
#1 0xfe28c1ff in sema_wait_impl () from /lib/libc.so.1
#2 0xfe28c3c3 in sema_wait () from /lib/libc.so.1
#3 0xfe27e967 in sem_wait () from /lib/libc.so.1
#4 0xfe4115bc in gomp_sem_wait (sem=0x8067924) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/sem.c:121
#5 0xfe41174c in gomp_barrier_wait_end (state=8, bar=0x806790c) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.c:92
#6 gomp_barrier_wait_end (bar=0x806790c, state=8) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.c:73
#7 0xfe4117c3 in gomp_barrier_wait (barrier=0x806790c) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.h:85
#8 0xfe40f437 in gomp_barrier_wait_last (bar=0x806790c) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.h:116
#9 gomp_thread_start (xdata=0xfeffd544) at
/vol/gcc/src/hg/trunk/local/libgomp/team.c:111
#10 0xfe29a779 in _thrp_setup () from /lib/libc.so.1
#11 0xfe29aa60 in ?? () from /lib/libc.so.1
#12 0x00000000 in ?? ()
Thread 9 (LWP 8 ):
#0 0xfe29aab9 in __lwp_park () from /lib/libc.so.1
#1 0xfe28c1ff in sema_wait_impl () from /lib/libc.so.1
#2 0xfe28c3c3 in sema_wait () from /lib/libc.so.1
#3 0xfe27e967 in sem_wait () from /lib/libc.so.1
#4 0xfe4115bc in gomp_sem_wait (sem=0x8067924) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/sem.c:121
#5 0xfe41174c in gomp_barrier_wait_end (state=8, bar=0x806790c) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.c:92
#6 gomp_barrier_wait_end (bar=0x806790c, state=8) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.c:73
#7 0xfe4117c3 in gomp_barrier_wait (barrier=0x806790c) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.h:85
#8 0xfe40f437 in gomp_barrier_wait_last (bar=0x806790c) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.h:116
#9 gomp_thread_start (xdata=0xfeffd698) at
/vol/gcc/src/hg/trunk/local/libgomp/team.c:111
#10 0xfe29a779 in _thrp_setup () from /lib/libc.so.1
#11 0xfe29aa60 in ?? () from /lib/libc.so.1
#12 0x00000000 in ?? ()
Thread 8 (LWP 7 ):
#0 0xfe29aab9 in __lwp_park () from /lib/libc.so.1
#1 0xfe28c1ff in sema_wait_impl () from /lib/libc.so.1
#2 0xfe28c3c3 in sema_wait () from /lib/libc.so.1
#3 0xfe27e967 in sem_wait () from /lib/libc.so.1
#4 0xfe4115bc in gomp_sem_wait (sem=0x8067924) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/sem.c:121
#5 0xfe41174c in gomp_barrier_wait_end (state=8, bar=0x806790c) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.c:92
#6 gomp_barrier_wait_end (bar=0x806790c, state=8) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.c:73
#7 0xfe4117c3 in gomp_barrier_wait (barrier=0x806790c) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.h:85
#8 0xfe40f437 in gomp_barrier_wait_last (bar=0x806790c) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.h:116
#9 gomp_thread_start (xdata=0xfeffd654) at
/vol/gcc/src/hg/trunk/local/libgomp/team.c:111
#10 0xfe29a779 in _thrp_setup () from /lib/libc.so.1
#11 0xfe29aa60 in ?? () from /lib/libc.so.1
#12 0x00000000 in ?? ()
Thread 7 (LWP 6 ):
#0 0xfe29aab9 in __lwp_park () from /lib/libc.so.1
#1 0xfe28c1ff in sema_wait_impl () from /lib/libc.so.1
#2 0xfe28c3c3 in sema_wait () from /lib/libc.so.1
#3 0xfe27e967 in sem_wait () from /lib/libc.so.1
#4 0xfe4115bc in gomp_sem_wait (sem=0x8067924) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/sem.c:121
#5 0xfe41174c in gomp_barrier_wait_end (state=8, bar=0x806790c) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.c:92
#6 gomp_barrier_wait_end (bar=0x806790c, state=8) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.c:73
#7 0xfe4117c3 in gomp_barrier_wait (barrier=0x806790c) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.h:85
#8 0xfe40f437 in gomp_barrier_wait_last (bar=0x806790c) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.h:116
#9 gomp_thread_start (xdata=0xfeffd610) at
/vol/gcc/src/hg/trunk/local/libgomp/team.c:111
#10 0xfe29a779 in _thrp_setup () from /lib/libc.so.1
#11 0xfe29aa60 in ?? () from /lib/libc.so.1
#12 0x00000000 in ?? ()
Thread 6 (LWP 5 ):
#0 0xfe29aab9 in __lwp_park () from /lib/libc.so.1
#1 0xfe28c1ff in sema_wait_impl () from /lib/libc.so.1
#2 0xfe28c3c3 in sema_wait () from /lib/libc.so.1
#3 0xfe27e967 in sem_wait () from /lib/libc.so.1
#4 0xfe4115bc in gomp_sem_wait (sem=0x8067924) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/sem.c:121
#5 0xfe41174c in gomp_barrier_wait_end (state=8, bar=0x806790c) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.c:92
#6 gomp_barrier_wait_end (bar=0x806790c, state=8) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.c:73
#7 0xfe4117c3 in gomp_barrier_wait (barrier=0x806790c) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.h:85
#8 0xfe40f437 in gomp_barrier_wait_last (bar=0x806790c) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.h:116
#9 gomp_thread_start (xdata=0xfeffd5cc) at
/vol/gcc/src/hg/trunk/local/libgomp/team.c:111
#10 0xfe29a779 in _thrp_setup () from /lib/libc.so.1
#11 0xfe29aa60 in ?? () from /lib/libc.so.1
#12 0x00000000 in ?? ()
Thread 5 (LWP 4 ):
#0 0xfe29aab9 in __lwp_park () from /lib/libc.so.1
#1 0xfe28c1ff in sema_wait_impl () from /lib/libc.so.1
#2 0xfe28c3c3 in sema_wait () from /lib/libc.so.1
#3 0xfe27e967 in sem_wait () from /lib/libc.so.1
#4 0xfe4115bc in gomp_sem_wait (sem=0x8067924) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/sem.c:121
#5 0xfe41174c in gomp_barrier_wait_end (state=8, bar=0x806790c) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.c:92
#6 gomp_barrier_wait_end (bar=0x806790c, state=8) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.c:73
#7 0xfe4117c3 in gomp_barrier_wait (barrier=0x806790c) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.h:85
#8 0xfe40f437 in gomp_barrier_wait_last (bar=0x806790c) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.h:116
#9 gomp_thread_start (xdata=0xfeffd588) at
/vol/gcc/src/hg/trunk/local/libgomp/team.c:111
#10 0xfe29a779 in _thrp_setup () from /lib/libc.so.1
#11 0xfe29aa60 in ?? () from /lib/libc.so.1
#12 0x00000000 in ?? ()
Thread 4 (LWP 3 ):
#0 0xfe29aab9 in __lwp_park () from /lib/libc.so.1
#1 0xfe28c1ff in sema_wait_impl () from /lib/libc.so.1
#2 0xfe28c3c3 in sema_wait () from /lib/libc.so.1
#3 0xfe27e967 in sem_wait () from /lib/libc.so.1
#4 0xfe4115bc in gomp_sem_wait (sem=0x8067924) at
/vol/gcc/src/hg/trunk/local/l
ibgomp/config/posix/sem.c:121
#5 0xfe41174c in gomp_barrier_wait_end (state=8, bar=0x806790c) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.c:92
#6 gomp_barrier_wait_end (bar=0x806790c, state=8) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.c:73
#7 0xfe4117c3 in gomp_barrier_wait (barrier=0x806790c) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.h:85
#8 0xfe40f437 in gomp_barrier_wait_last (bar=0x806790c) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.h:116
#9 gomp_thread_start (xdata=0xfeffd544) at
/vol/gcc/src/hg/trunk/local/libgomp/team.c:111
#10 0xfe29a779 in _thrp_setup () from /lib/libc.so.1
#11 0xfe29aa60 in ?? () from /lib/libc.so.1
#12 0x00000000 in ?? ()
Thread 2 (Thread 1 ):
#0 0xfe29aab9 in __lwp_park () from /lib/libc.so.1
#1 0xfe28c1ff in sema_wait_impl () from /lib/libc.so.1
#2 0xfe28c3c3 in sema_wait () from /lib/libc.so.1
#3 0xfe27e967 in sem_wait () from /lib/libc.so.1
#4 0xfe4115bc in gomp_sem_wait (sem=0x8067924) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/sem.c:121
#5 0xfe41174c in gomp_barrier_wait_end (state=8, bar=0x806790c) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.c:92
#6 gomp_barrier_wait_end (bar=0x806790c, state=8) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.c:73
#7 0xfe4117c3 in gomp_barrier_wait (barrier=0x806790c) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.h:85
#8 0xfe410967 in gomp_team_end () at
/vol/gcc/src/hg/trunk/local/libgomp/team.c:965
#9 0xfe406c98 in GOMP_parallel_reductions (fn=0x80513f0 <void bar<int, long
long>() [clone ._omp_fn.1]>, data=0xfeffd7f0, num_threads=8, flags=0) at
/vol/gcc/src/hg/trunk/local/libgomp/parallel.c:186
#10 0x0805154f in void bar<int, long long>() [clone ._omp_fn.0] ()
#11 0xfe406c30 in GOMP_parallel (fn=0x80514d0 <void bar<int, long long>()
[clone ._omp_fn.0]>, data=0xfeffd8c8, num_threads=1, flags=0) at
/vol/gcc/src/hg/trunk/local/libgomp/parallel.c:171
#12 0x08051719 in void bar<int, long long>() ()
#13 0x0805175b in main ()
Thread 1 (LWP 1 ):
#0 0xfe29aab9 in __lwp_park () from /lib/libc.so.1
#1 0xfe28c1ff in sema_wait_impl () from /lib/libc.so.1
#2 0xfe28c3c3 in sema_wait () from /lib/libc.so.1
#3 0xfe27e967 in sem_wait () from /lib/libc.so.1
#4 0xfe4115bc in gomp_sem_wait (sem=0x8067924) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/sem.c:121
#5 0xfe41174c in gomp_barrier_wait_end (state=8, bar=0x806790c) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.c:92
#6 gomp_barrier_wait_end (bar=0x806790c, state=8) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.c:73
#7 0xfe4117c3 in gomp_barrier_wait (barrier=0x806790c) at
/vol/gcc/src/hg/trunk/local/libgomp/config/posix/bar.h:85
#8 0xfe410967 in gomp_team_end () at
/vol/gcc/src/hg/trunk/local/libgomp/team.c:965
#9 0xfe406c98 in GOMP_parallel_reductions (fn=0x80513f0 <void bar<int, long
long>() [clone ._omp_fn.1]>, data=0xfeffd7f0, num_threads=8, flags=0) at
/vol/gcc/src/hg/trunk/local/libgomp/parallel.c:186
#10 0x0805154f in void bar<int, long long>() [clone ._omp_fn.0] ()
#11 0xfe406c30 in GOMP_parallel (fn=0x80514d0 <void bar<int, long long>()
[clone ._omp_fn.0]>, data=0xfeffd8c8, num_threads=1, flags=0) at
/vol/gcc/src/hg/trunk/local/libgomp/parallel.c:171
#12 0x08051719 in void bar<int, long long>() ()
#13 0x0805175b in main ()
