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On rzansel, do not use the --pack lrun/jsrun option. #835

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May 19, 2020
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On rzansel, do not use the --pack lrun/jsrun option. #835

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8 changes: 6 additions & 2 deletions config/setupMPI.cmake
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Original file line number Diff line number Diff line change
Expand Up @@ -377,15 +377,19 @@ macro( setupSpectrumMPI )
# total
# - jsrun -a4 -c16 -g2 => 4 tasks, 16 cores, 2 gpus

set( MPIEXEC_PREFLAGS "--pack --threads=1 --bind=off -v")
set( MPIEXEC_PREFLAGS "--threads=1 --bind=off -v")
# --pack ==> -c 1 -g 0. This is actually bad for us. Disable
# lrun -n 2 -c 10 --threads=10 --bind=off ==>
# jsrun --np 1 --nrs 1 -c ALL_CPUS -g ALL_GPUS -d plane:1 -b rs -X 1
# consider: jsrun --np 2 --nrs 1 -c 10 -g 0 -bind none

#
# Setup for OMP plus MPI
#

if( DEFINED ENV{OMP_NUM_THREADS} )
# set( MPIEXEC_OMP_PREFLAGS "-c $ENV{OMP_NUM_THREADS}" )
set( MPIEXEC_OMP_PREFLAGS "--pack -c $ENV{OMP_NUM_THREADS} --threads=$ENV{OMP_NUM_THREADS} --bind=off -v" )
set( MPIEXEC_OMP_PREFLAGS "-c $ENV{OMP_NUM_THREADS} --threads=$ENV{OMP_NUM_THREADS} --bind=off -v" )
endif()

set( MPIEXEC_OMP_PREFLAGS ${MPIEXEC_OMP_PREFLAGS}
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1 change: 1 addition & 0 deletions environment/bashrc/.bashrc_ats2
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Expand Up @@ -17,6 +17,7 @@ ulimit -s unlimited
# Where is the vendor directory
export PATH=${VENDOR_DIR:=/usr/gapps/jayenne/vendors}/bin:$PATH
export VENDOR_DIR
export JSM_JSRUN_NO_WARN_OVERSUBSCRIBE=1

#
# MODULES
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