I've encountered a strange problem with a threaded app.
Using slurm 16.05.8, I see the following:
$ srun -N1 --cpus-per-task=2 ./thread-ex
Thread 1 says Hello!
Thread 2 says Hi!
$
However, the same command with slurm 17.11.0-0pre2 generates
$ srun -N1 --cpus-per-task=2 ./thread-ex
Thread 1 says Hello!
Thread 2 says Hi!
Thread 2 says Hi!
Thread 1 says Hello!
Thread 1 says Hello!
Thread 2 says Hi!
Thread 1 says Hello!
Thread 1 says Hello!
Thread 2 says Hi! Thread 1 says Hello!
Thread 2 says Hi!
Thread 1 says Hello!
Thread 2 says Hi!
Thread 2 says Hi!
Thread 1 says Hello!
Thread 2 says Hi!
Thread 1 says Hello!
Thread 2 says Hi!
Thread 1 says Hello!
Thread 2 says Hi!
$
If I add "-n1" to the command line, I get back to the previous behavior.
Is this an intentional change?
Andy
--
Andy Riebs
andy.ri...@hpe.com
Hewlett-Packard Enterprise
High Performance Computing Software Engineering
+1 404 648 9024
My opinions are not necessarily those of HPE
May the source be with you!
