Processor counts in tests

[Joseph Parker]

On my laptop, tests run with nproc instances of a one processor test, not one test using nproc processors. This is not the expected behaviour, or the behaviour seen in the pipelines. Does anyone else observe this?

[Peter Hill]

When I run make tests, all the tests run with mpirun -np 2, e.g. : passed: gs2_init (mpirun -np 2 ./test_gs2_init test_gs2_init.in )

[David Dickinson]

I've not tested this, but it will depend on which system makefile you're using (some define testexec etc. whilst others don't).

(Looking into these makefiles I think we'll need to overhaul some of this to improve the ability to maintain+develop this.)

[Joseph Parker]

Thanks both. @ZedThree does the test output report:

 Running on            2  processors

[Peter Hill]

Looks like it:

make[2]: Entering directory '/home/peter/Codes/gyrokinetics/gs2/tests/unit_tests/asym_geo_genElong'
 Job           -1 Running on            2  processors

The very first test looks like this though:

 Reading CHEASE input file: ogyropsi.dat                                                                    
          41 <---npsi_chease
         200 <---nchi_chease
 Job           -1 Running on            2  processors

 Job            1  is called wstar_units_false and is running on            1  processor
 Job            0  is called wstar_units and is running on            1  processor
 Finished ceqin... imported CHEASE equilibrium

[Joseph Parker]

@daviddickinson I've defined TESTEXEC='mpirun -np 6', but it runs six copies of a one proc job.

[David Dickinson]

What if you don't define TESTEXEC but do define NPROCS or NPROCTEST (or whatever it is called)?

[Joseph Parker]

Thanks @ZedThree, that looks right. What is your GK_SYSTEM?

[David Dickinson]

Just for sanity, what happens if you actually run mpirun -np 6 ./test_name test_input.in?

[Peter Hill]

This is my Makefile.local:

# -*- mode: makefile-gmake -*-

MAKEFLAGS = -I Makefiles

GK_SYSTEM = gnu_ubuntu

DEBUG = on

USE_F200X_INTRINSICS = on

FFT_INC = -I/usr/include

NETCDF_INC = -I/usr/local/include
NETCDF_LIB = -L/usr/local/lib64 -lnetcdff -lnetcdf

F90FLAGS += -Wall -Wextra -std=gnu -ffree-form

ONE_STEP_PP = on

[Joseph Parker]

@daviddickinson :

$ mpirun -np 6 ./test_gs2_diagnostics test_gs2_diagnostics.in 
 Running on            1  processor

 Running on            1  processor

 Running on            1  processor

 Running on            1  processor

 Running on            1  processor

 Running on            1  processor

[David Dickinson]

You've compiled with a serial compiler or use_mpi undefined

[Joseph Parker]

Thanks @daviddickinson , it's that. Why, yes, I have been messy around with update-alternatives --config mpi...