Test Farm
#########

The EPW code is part of the `Quantum ESPRESSO <https://www.quantum-espresso.org/>`_ test farm (managed with `Buildbot <http://buildbot.net/>`_).

Fourth test-farm (2021-now)
=======================

The test-farm is hosted on a Intel(R) Xeon(R) Gold 6140 CPU @ 2.30GHz with 36 physical cores located in the University of Udine.
An explaination of the test suite can be found on the `QE wiki <https://gitlab.com/QEF/q-e/-/wikis/Developers/Test-suite-and-test-farm>`_. 

The nighly Buildbot test farm can be accessed `here <http://158.110.145.67:8010/#/builders>`_.

It test the following configurations:
 * GCC v.10.2, serial
 * GCC v.10.2, MPI (openmpi v.4.0.4)
 * GCC v.10.2, MPI (openmpi v.4.0.4), with HDF5
 * GCC v.10.2, MPI and OpenMP
 * GCC v.7.5, MPI (openmpi v.3.1.3), with debug flags on
 * Intel ifort v.19, with MKL, MPICH v.2.3
 * Intel ifort v.19, with MKL, Intel MPI
 * PGI v.19.10, MPI (openmpi v3.1.3)
 * PGI v.19.10, MPI (openmpi v3.1.3), compiled for CUDA
 * PGI v.20.11, MPI (openmpi v3.1.3), compiled for CUDA

The test-farm is currently maintained by Samuel Poncé and Paolo Giannozzi. 

Second and third test-farm (2019-2021)
=======================

The test-farm was hosted by CINECA (Italy) and test the following configurations:
 * gcc640 serial
 * gcc640 + openmpi-1.10.7
 * intel 12 + openmpi-1.10.7
 * intel 17 + impi
 * PGI 17 + mvapich2.3

From 2019 to Mar 2020 it was accessible `here <http://130.186.13.169:8010>`_ (down) and 
from Mar 2020 to 2021 it was accessible `here <http://131.175.198.220:8010>`_ (down).

It was managed by Samuel Poncé, Paolo Giannozzi, Giuseppa Muscianisi, and Simone Marocchi. 

First EPW test-farm (2015-2019)
=======================

The EPW test suite and test-farm were created by Samuel Poncé in Oxford and was accessible at `here <http://129.67.86.21:8010/>`_ (down).
It was based on a python script originally developed by J. Spencer. 

It was composed of the following workers:

=========================== ====================  =========================  ========================================  ===========================================================  ==============  ===================================
:doc:`Slaves <Slaves>`      Builders              OS                         Compiler                                  Flags                                                        Parallel        Library
=========================== ====================  =========================  ========================================  ===========================================================  ==============  ===================================
 farmer                     farmer_gcc485_serial  Ubuntu 14.04.3             gcc 4.8.5                                 gfortran -O3 -g -x f95-cpp-input                             -               internal (Lapack 3.2 and Blas 1)
 farmer                     farmer_gcc485         Ubuntu 14.04.3             gcc 4.8.5                                 mpif90 -O3 -g -x f95-cpp-input                               openmpi 1.8.8   internal (Lapack 3.2 and Blas 1)
 farmer                     farmer_intel12        Ubuntu 14.04.3             intel 12.1.2                              ifort -O2 -assume byterecl -g -traceback -nomodule -fpp      openmpi 1.8.8   Scalapack and Blas MKL
 farmer                     farmer_intel13        Ubuntu 14.04.3             intel 13.1.3                              mpif90 -O3 -xHost -assume byterecl -assume buffered_io -fpp  openmpi 1.8.8   Scalapack and Blas MKL + fftw 3.3.4
 farmer                     farmer_intel15        Ubuntu 14.04.3             intel 15.0.3                              mpif90 -O2 -assume byterecl -g -traceback -nomodule -fpp     openmpi 1.8.8   Scalapack and Blas MKL + fftw 3.3.4
 farm2                      farm2_gcc520          CentOS 7.1.1503            gcc 5.2.0                                 gfortran -O3 -g -x f95-cpp-input                             openmpi 1.8.8   internal (Lapack 3.2 and Blas 1)
 farm2                      farm2_pgi15           CentOS 7.1.1503            pgf90 15.7                                pgcc -fast                                                   mpich 3.1.3     fftw 3.3.4
 farm2                      farm2_intel13         CentOS 7.1.1503            intel 13.0.1                              mpif90 -O3 -xHost -assume byterecl -assume buffered_io -fpp  mpich 3.1.4     Scalapack and Blas MKL + fftw 3.3.4
 farm2                      farm2_intel15         CentOS 7.1.1503            intel 15.0.3                              mpif90 -O3 -g -x f95-cpp-input                               Intel mpi 5.1   Scalapack and Blas MKL + fftw 3.3.4
 farm2                      farm2_nag6            CentOS 7.1.1503            NAG Fortran Compiler Release 6.0(Hibiya)  nagfor -O0 -kind=byte -dcfuns -mismatch                      -               internal  (Lapack 3.2 and Blas 1)
 farmer3                    farmer3_gcc493        openSUSE 13.2              gcc 4.9.3                                 mpif90 -O3 -g -x f95-cpp-input                               mpich 3.1.3     fftw 3.3.4
 farmer3                    farmer3_intel15       openSUSE 13.2              intel 15.0.3                              mpif90 -O3 -xHost -assume byterecl -assume buffered_io -fpp  mvapich2 2.2a   Scalapack, Blas and FFT MKL
 farmer4                    farmer4_intel15       Scientific Linux 7.1.1503  gcc 4.8.5                                 mpif90 -O3 -g -x f95-cpp-input                               openmpi 1.10.2  OpenBlas 0.2.18
=========================== ====================  =========================  ========================================  ===========================================================  ==============  ===================================

EPW is not supported with the following libraries (bugs in libraries or else):

- openmpi 2.0.2 (but likely on all the 2.x.x version): If you open and close a file a lot of times with openmpi 2.0.2, the memory increase linearly with the number of times the file is open.