https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65589
felix.ospald at gmx dot de changed:
What|Removed |Added
Status|WAITING |RESOLVED
Resolution
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65589
--- Comment #11 from felix.ospald at gmx dot de ---
I can confirm that the bug still exists for the trunk version (rev 221721) of
gcc.
So as mentioned above it is very likely the kernel bug.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65589
--- Comment #10 from felix.ospald at gmx dot de ---
gcc still compiles, but I think I found the answer here:
http://stackoverflow.com/questions/24219263/openmp-on-a-2-socket-system
"The problem was due to a bug in Linux Kernel kernel 3.11
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65589
--- Comment #9 from felix.ospald at gmx dot de ---
Hi,
I attached an output from
strace ./main 2>&1 | tee log
Maybe this helps. I see that there are some futex EAGAIN errors. I'm not sure
if this is a problem (I also get them on my notebook).
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65589
--- Comment #8 from felix.ospald at gmx dot de ---
Created attachment 35156
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35156&action=edit
strace output
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65589
--- Comment #7 from felix.ospald at gmx dot de ---
(In reply to Andrew Pinski from comment #6)
> I ran for 2836 iterations with the trunk GCC and aarch64 which has a very
> weak memory ordering and did not run into a single failure.
This i
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65589
--- Comment #4 from felix.ospald at gmx dot de ---
(In reply to Jakub Jelinek from comment #3)
> Can't reproduce here, with neither 4.8 nor 4.9. But tested just on 16
> threads box (both with argument 16 and 32).
With only 16 thr
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65589
--- Comment #2 from felix.ospald at gmx dot de ---
(In reply to Andrew Pinski from comment #1)
> I cannot reproduce this on an AARCH64 target with 48 cores with the trunk.
I do not have the trunk installed. What do you suggest? Should I comp
Priority: P3
Component: libgomp
Assignee: unassigned at gcc dot gnu.org
Reporter: felix.ospald at gmx dot de
CC: jakub at gcc dot gnu.org
/*
gcc --version
gcc (SUSE Linux) 4.8.1 20130909 [gcc-4_8-branch revision 202388]
echo | cpp -fopenmp -dM | grep -i
