Preferentially use /dev/shm on Linux #5230
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This commit adds a new MCA variable to set the location of the backing store: osc_rdma_backing_directory. The default on Linux has been changed to use /dev/shm to improve performance in cases where /tmp is not a tmpfs. Signed-off-by: Nathan Hjelm <hjelmn@lanl.gov> (cherry picked from commit d0d59b1) Signed-off-by: Nathan Hjelm <hjelmn@lanl.gov>
This commit adds a new MCA variable to set the location of the backing store: osc_sm_backing_directory. The default on Linux has been changed to use /dev/shm to improve performance in cases where /tmp is not a tmpfs. Signed-off-by: Nathan Hjelm <hjelmn@lanl.gov> (cherry picked from commit e9de425) Signed-off-by: Nathan Hjelm <hjelmn@lanl.gov>
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bosilca
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Jun 5, 2018
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These commits add MCA variables to control where the osc/rdma and osc/sm components store shared memory segments. This variable is set to /dev/shm if it exists. This works around possible performance issues if the session directory is not a tmpfs.
Master will move this support into opal/shmem.