Hi all, anyone around there, who could explain me how the naming scheme for the PSM2 and Vader shared memory segments is constructed. I am curious if there is a possibility to influence the naming scheme via run-time parameters. I am confronted to the situation where distinct SLURM jobs of the same user on the same node randomly segfault. I suppose that the problem is connected with the non-unique naming scheme of the PSM2 shared memory segments (as determined by openmpi/SLURM). The PSM segments show the following naming convention: /dev/shm/psm2_shm.[user_id][some_mask] Unfortunately, the values of the mask do not change for distinct SLURM jobs. Instead the names of the Vader segments show uniqueness for different process ids: /dev/shm/vader_segment.[nodename].[some_process-mask].[SLURM_STEPID]
An example: Vader segments: -rw------- 1 XXX YYY 4.1M Jul 4 19:09 /dev/shm/vader_segment.nodename.93e00001.5 -rw------- 1 XXX YYY 4.1M Jul 4 19:09 /dev/shm/vader_segment.nodename.93e00001.3 -rw------- 1 XXX YYY 4.1M Jul 4 19:09 /dev/shm/vader_segment.nodename.93e00001.1 -rw------- 1 XXX YYY 4.1M Jul 4 19:09 /dev/shm/vader_segment.nodename.93e00001.7 -rw------- 1 XXX YYY 4.1M Jul 4 19:09 /dev/shm/vader_segment.nodename.93e00001.6 -rw------- 1 XXX YYY 4.1M Jul 4 19:09 /dev/shm/vader_segment.nodename.93e00001.0 -rw------- 1 XXX YYY 4.1M Jul 4 19:09 /dev/shm/vader_segment.nodename.93e00001.2 -rw------- 1 XXX YYY 4.1M Jul 4 19:09 /dev/shm/vader_segment.nodename.93e00001.4 -rw------- 1 XXX YYY 4.1M Jul 4 19:09 /dev/shm/vader_segment.nodename.93650001.7 -rw------- 1 XXX YYY 4.1M Jul 4 19:09 /dev/shm/vader_segment.nodename.93650001.5 -rw------- 1 XXX YYY 4.1M Jul 4 19:09 /dev/shm/vader_segment.nodename.93650001.1 -rw------- 1 XXX YYY 4.1M Jul 4 19:09 /dev/shm/vader_segment.nodename.93650001.4 -rw------- 1 XXX YYY 4.1M Jul 4 19:09 /dev/shm/vader_segment.nodename.93650001.3 -rw------- 1 XXX YYY 4.1M Jul 4 19:09 /dev/shm/vader_segment.nodename.93650001.0 -rw------- 1 XXX YYY 4.1M Jul 4 19:09 /dev/shm/vader_segment.nodename.93650001.6 -rw------- 1 XXX YYY 4.1M Jul 4 19:09 /dev/shm/vader_segment.nodename.93650001.2 PSM2 segments: -rw------- 1 XXX YYY 4.2M Jul 4 19:09 /dev/shm/psm2_shm.117648500000007ff0000e00 -rw------- 1 XXX YYY 4.2M Jul 4 19:09 /dev/shm/psm2_shm.117648500000006ff0000c00 -rw------- 1 XXX YYY 4.2M Jul 4 19:09 /dev/shm/psm2_shm.117648500000005ff0000a00 -rw------- 1 XXX YYY 4.2M Jul 4 19:09 /dev/shm/psm2_shm.117648500000003ff0000600 -rw------- 1 XXX YYY 4.2M Jul 4 19:09 /dev/shm/psm2_shm.117648500000002ff0000400 -rw------- 1 XXX YYY 4.2M Jul 4 19:09 /dev/shm/psm2_shm.117648500000001ff0000200 -rw------- 1 XXX YYY 4.2M Jul 4 19:09 /dev/shm/psm2_shm.117648500000000ff0000000 -rw------- 1 XXX YYY 4.2M Jul 4 19:09 /dev/shm/psm2_shm.117648500000004ff0000800 Thanks for your time and support Sebastian Sebastian Kraus Technische Universität Berlin Fakultät II Institut für Chemie Sekretariat C3 Straße des 17. Juni 135 10623 Berlin _______________________________________________ users mailing list users@lists.open-mpi.org https://lists.open-mpi.org/mailman/listinfo/users
