BerkeleyGW¶

The BerkeleyGW package is a set of computer codes that calculates the quasiparticle properties and the optical responses of a large variety of materials from bulk periodic crystals to nanostructures such as slabs, wires and molecules. The package takes as input the mean-field results from various electronic structure codes such as the Kohn-Sham DFT eigenvalues and eigenvectors computed with Quantum ESPRESSO, EPM, PARSEC, Octopus, Abinit, Siesta, etc.

Availability and Supported Architectures at NERSC¶

BerkeleyGW is available at NERSC as a provided support level package. Version 3.x includes support for GPUs.

Versions Supported¶

Perlmutter GPU	Perlmutter CPU
3.x	3.x

Use the module avail berkeleygw command to see a full list of available sub-versions.

Application Information, Documentation, and Support¶

BerkeleyGW is freely available and can be downloaded from the BerkeleyGW home page. See the online documentation for the user manual, tutorials, examples, and links to previous workshops and literature articles. For troubleshooting, see the BerkeleyGW Help Forum. For help with issues specific to the NERSC module, please file a support ticket.

Using BerkeleyGW at NERSC¶

Use the module avail command to see which versions are available and module load <version> to load the environment:

nersc$ module avail berkeleygw
   berkeleygw/3.0.1-cpu    berkeleygw/3.0.1-gpu (D)

nersc$ module load berkeleygw/3.0.1-gpu

Sample Job Scripts¶

See the example jobs page for additional examples and information about jobs.

Perlmutter GPU

#!/bin/bash

# 2 Perlmutter nodes, 8 MPI processes, 1 GPU-per-MPI-process

#SBATCH -q regular
#SBATCH -C gpu
#SBATCH -t 01:00:00
#SBATCH -n 8
#SBATCH -c 32
#SBATCH --ntasks-per-node=4
#SBATCH --gpus-per-task=1
#SBATCH --gpu-bind=map_gpu:0,1,2,3

export TEMPDIRPATH=$SCRATCH/tmp
export OMP_NUM_THREADS=1
export SLURM_CPU_BIND="cores"
export MPIEXEC="`which srun` "

srun epsilon.cplx.x

Perlmutter CPU

#!/bin/bash

# 8 Perlmutter nodes, 8 MPI processes, 24 OpenMP threads-per-MPI-process

#SBATCH -C cpu
#SBATCH -q regular
#SBATCH -n 8
#SBATCH --tasks-per-node=1
#SBATCH --cpus-per-task=256
#SBATCH -t 01:00:00

export HDF5_USE_FILE_LOCKING=FALSE
export BGW_HDF5_WRITE_REDIST=1

ulimit -s unlimited
export OMP_PROC_BIND=spread
export OMP_PLACES=threads
export OMP_NUM_THREADS=24

srun epsilon.cplx.x

Tip

In some cases the epsilon module will fail while trying to access a file in HDF5 format. To prevent this, add export HDF5_USE_FILE_LOCKING=FALSE to the job script.

Building BerkeleyGW from Source¶

Some users may be interested in modifying the BerkeleyGW build parameters and/or building BerkeleyGW themselves. BerkeleyGW can be downloaded as a tarball from the download page. Build instructions are included in the Makefile and in README.md in the BerkeleyGW main directory. Before building, one must load the appropriate modules and create a configuration file in the BerkeleyGW main directory. Sample configuration files, found in the config directory, can be copied into the main directory, edited, and renamed as arch.mk. Sample configuration file headers also contain recommendations of the modules to load.

Building on Perlmutter for GPUs

The following arch.mk file may be used to build BerkeleyGW 3.0.1 targeting GPUs on Perlmutter:

# arck.mk for NERSC Perlmutter GPU build
#
# Load the following modules before building:
# ('PrgEnv-nvidia' MUST be pre-loaded! Modules 'cudatoolkit' and 'gpu' should be loaded by default.)
#
# module load cray-hdf5-parallel ; module load cray-fftw ; module load cray-libsci ; module load python
#
COMPFLAG  = -DPGI
PARAFLAG  = -DMPI  -DOMP
MATHFLAG  = -DUSESCALAPACK -DUNPACKED -DUSEFFTW3 -DHDF5  -DOPENACC -DOMP_TARGET

NVCC=nvcc 
NVCCOPT= -O3 -use_fast_math
CUDALIB= -lcufft -lcublasLt -lcublas -lcudart -lcuda

FCPP    = /usr/bin/cpp  -C   -nostdinc
F90free = ftn -Mfree -acc -mp=multicore,gpu -gpu=cc80  -Mcudalib=cublas,cufft -Mcuda=lineinfo -traceback -Minfo=mp,acc -gopt -traceback
LINK    = ftn        -acc -mp=multicore,gpu -gpu=cc80  -Mcudalib=cublas,cufft -Mcuda=lineinfo -Minfo=mp,acc
FOPTS   = -fast -Mfree -Mlarge_arrays
FNOOPTS = $(FOPTS)
MOD_OPT = -module  
INCFLAG = -I 

C_PARAFLAG  = -DPARA -DMPICH_IGNORE_CXX_SEEK
CC_COMP = CC
C_COMP  = cc
C_LINK  = cc ${CUDALIB} -lstdc++
C_OPTS  = -fast -mp 
C_DEBUGFLAG =

REMOVE  = /bin/rm -f

FFTWLIB      = $(FFTW_DIR)/libfftw3.so \
               $(FFTW_DIR)/libfftw3_threads.so \
               $(FFTW_DIR)/libfftw3_omp.so \
               ${CUDALIB}  -lstdc++
FFTWINCLUDE  = $(FFTW_INC)
PERFORMANCE  = 

SCALAPACKLIB = 
LAPACKLIB    =  ${CRAY_NVIDIA_PREFIX}/compilers/lib/liblapack.so ${CRAY_NVIDIA_PREFIX}/compilers/lib/libblas.so
HDF5_LDIR    =  ${HDF5_DIR}/lib/
HDF5LIB      =  $(HDF5_LDIR)/libhdf5hl_fortran.so \
                $(HDF5_LDIR)/libhdf5_hl.so \
                $(HDF5_LDIR)/libhdf5_fortran.so \
                $(HDF5_LDIR)/libhdf5.so -lz -ldl
HDF5INCLUDE  = ${HDF5_DIR}/include/

Building on Perlmutter for CPUs

The following arch.mk file may be used to build BerkeleyGW 3.0.1 targeting CPUs on Perlmutter:

# arck.mk for NERSC Perlmutter CPU build using GNU compiler
#
# Load the following modules before building:
# ('PrgEnv-gnu' MUST be pre-loaded!)
#
# module load cpu && module unload darshan && module swap gcc/11.2.0 gcc/10.3.0 && module load cray-fftw && module load cray-hdf5-parallel && module load cray-libsci && module load python && export CRAYPE_LINK_TYPE=static
#
COMPFLAG = -DGNU
PARAFLAG = -DMPI -DOMP
MATHFLAG = -DUSESCALAPACK -DUNPACKED -DUSEFFTW3 -DHDF5

FCPP = /usr/bin/cpp -C -nostdinc
F90free = ftn -fopenmp -ffree-form -ffree-line-length-none -fno-second-underscore
LINK = ftn -fopenmp -dynamic
FOPTS = -O3 -funroll-loops -funsafe-math-optimizations -fallow-argument-mismatch
FNOOPTS = $(FOPTS)
MOD_OPT = -J
INCFLAG = -I

C_PARAFLAG = -DPARA -DMPICH_IGNORE_CXX_SEEK
CC_COMP = CC
C_COMP = cc
C_LINK = CC -dynamic
C_OPTS = -O3 -ffast-math
C_DEBUGFLAG =

REMOVE = /bin/rm -f

FFTWINCLUDE = $(FFTW_INC)
PERFORMANCE =

LAPACKLIB =

HDF5_LDIR = $(HDF5_DIR)/lib
HDF5LIB = $(HDF5_LDIR)/libhdf5hl_fortran.a \
$(HDF5_LDIR)/libhdf5_hl.a \
$(HDF5_LDIR)/libhdf5_fortran.a \
$(HDF5_LDIR)/libhdf5.a -lz -ldl
HDF5INCLUDE = $(HDF5_DIR)/include

After loading the selected modules and creating arch.mk in the BGW main directory, build using the following commands:

nersc$ make cleanall
nersc$ make all-flavors

User Contributed Information¶

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