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# --------------------------------------------------------------------
from petsc4py import PETSc
import unittest
from sys import getrefcount
# --------------------------------------------------------------------
class BaseMyPC:
def setup(self, pc):
pass
def reset(self, pc):
pass
def apply(self, pc, x, y):
raise NotImplementedError
def applyT(self, pc, x, y):
self.apply(pc, x, y)
def applyS(self, pc, x, y):
self.apply(pc, x, y)
def applySL(self, pc, x, y):
self.applyS(pc, x, y)
def applySR(self, pc, x, y):
self.applyS(pc, x, y)
def applyRich(self, pc, x, y, w, tols):
self.apply(pc, x, y)
def applyM(self, pc, x, y):
raise NotImplementedError
class MyPCNone(BaseMyPC):
def apply(self, pc, x, y):
x.copy(y)
def applyM(self, pc, x, y):
x.copy(y)
class MyPCJacobi(BaseMyPC):
def setup(self, pc):
A, P = pc.getOperators()
self.diag = P.getDiagonal()
self.diag.reciprocal()
def reset(self, pc):
self.diag.destroy()
del self.diag
def apply(self, pc, x, y):
y.pointwiseMult(self.diag, x)
def applyS(self, pc, x, y):
self.diag.copy(y)
y.sqrtabs()
y.pointwiseMult(y, x)
def applyM(self, pc, x, y):
x.copy(y)
y.diagonalScale(L=self.diag)
class PC_PYTHON_CLASS:
def __init__(self):
self.impl = None
self.log = {}
def _log(self, method, *args):
self.log.setdefault(method, 0)
self.log[method] += 1
def create(self, pc):
self._log('create', pc)
def destroy(self, pc):
self._log('destroy')
self.impl = None
def reset(self, pc):
self._log('reset', pc)
def view(self, pc, vw):
self._log('view', pc, vw)
def setFromOptions(self, pc):
self._log('setFromOptions', pc)
OptDB = PETSc.Options(pc)
impl = OptDB.getString('impl', 'MyPCNone')
klass = globals()[impl]
self.impl = klass()
def setUp(self, pc):
self._log('setUp', pc)
self.impl.setup(pc)
def preSolve(self, pc, ksp, b, x):
self._log('preSolve', pc, ksp, b, x)
def postSolve(self, pc, ksp, b, x):
self._log('postSolve', pc, ksp, b, x)
def apply(self, pc, x, y):
self._log('apply', pc, x, y)
self.impl.apply(pc, x, y)
def applySymmetricLeft(self, pc, x, y):
self._log('applySymmetricLeft', pc, x, y)
self.impl.applySL(pc, x, y)
def applySymmetricRight(self, pc, x, y):
self._log('applySymmetricRight', pc, x, y)
self.impl.applySR(pc, x, y)
def applyTranspose(self, pc, x, y):
self._log('applyTranspose', pc, x, y)
self.impl.applyT(pc, x, y)
def matApply(self, pc, x, y):
self._log('matApply', pc, x, y)
self.impl.applyM(pc, x, y)
def applyRichardson(self, pc, x, y, w, tols):
self._log('applyRichardson', pc, x, y, w, tols)
self.impl.applyRich(pc, x, y, w, tols)
class TestPCPYTHON(unittest.TestCase):
PC_TYPE = PETSc.PC.Type.PYTHON
PC_PREFIX = 'test-'
def setUp(self):
pc = self.pc = PETSc.PC()
pc.create(PETSc.COMM_SELF)
pc.setType(self.PC_TYPE)
module = __name__
factory = 'PC_PYTHON_CLASS'
self.pc.prefix = self.PC_PREFIX
OptDB = PETSc.Options(self.pc)
self.assertTrue(OptDB.prefix == self.pc.prefix)
OptDB['pc_python_type'] = f'{module}.{factory}'
self.pc.setFromOptions()
del OptDB['pc_python_type']
self.assertTrue(self._getCtx().log['create'] == 1)
self.assertTrue(self._getCtx().log['setFromOptions'] == 1)
self.assertEqual(getrefcount(self._getCtx()), 2)
def testGetType(self):
ctx = self.pc.getPythonContext()
pytype = f'{ctx.__module__}.{type(ctx).__name__}'
self.assertTrue(self.pc.getPythonType() == pytype)
def tearDown(self):
ctx = self._getCtx()
self.pc.destroy() # XXX
self.pc = None
PETSc.garbage_cleanup()
self.assertTrue(ctx.log['destroy'] == 1)
def _prepare(self):
A = PETSc.Mat().createAIJ([3, 3], comm=PETSc.COMM_SELF)
A.setUp()
A.assemble()
A.shift(10)
x, y = A.createVecs()
x.setRandom()
self.pc.setOperators(A, A)
X = PETSc.Mat().createDense([3, 5], comm=PETSc.COMM_SELF).setUp()
X.assemble()
Y = PETSc.Mat().createDense([3, 5], comm=PETSc.COMM_SELF).setUp()
Y.assemble()
self.assertTrue((A, A) == self.pc.getOperators())
return A, x, y, X, Y
def _getCtx(self):
return self.pc.getPythonContext()
def _applyMeth(self, meth):
A, x, y, X, Y = self._prepare()
if meth == 'matApply':
getattr(self.pc, meth)(X, Y)
x.copy(y)
else:
getattr(self.pc, meth)(x, y)
X.copy(Y)
if 'reset' not in self._getCtx().log:
self.assertTrue(self._getCtx().log['setUp'] == 1)
self.assertTrue(self._getCtx().log[meth] == 1)
else:
nreset = self._getCtx().log['reset']
nsetup = self._getCtx().log['setUp']
nmeth = self._getCtx().log[meth]
self.assertTrue(nreset == nsetup)
self.assertTrue(nreset == nmeth)
if isinstance(self._getCtx().impl, MyPCNone):
self.assertTrue(y.equal(x))
self.assertTrue(Y.equal(X))
def testApply(self):
self._applyMeth('apply')
def testApplySymmetricLeft(self):
self._applyMeth('applySymmetricLeft')
def testApplySymmetricRight(self):
self._applyMeth('applySymmetricRight')
def testApplyTranspose(self):
self._applyMeth('applyTranspose')
def testApplyMat(self):
self._applyMeth('matApply')
## def testApplyRichardson(self):
## x, y = self._prepare()
## w = x.duplicate()
## tols = 0,0,0,0
## self.pc.applyRichardson(x,y,w,tols)
## assert self._getCtx().log['setUp'] == 1
## assert self._getCtx().log['applyRichardson'] == 1
## def testView(self):
## vw = PETSc.ViewerString(100, self.pc.comm)
## self.pc.view(vw)
## s = vw.getString()
## assert 'python' in s
## module = __name__
## factory = 'self._getCtx()'
## assert '.'.join([module, factory]) in s
def testResetAndApply(self):
self.pc.reset()
self.testApply()
self.pc.reset()
self.testApply()
self.pc.reset()
def testKSPSolve(self):
A, x, y, _, _ = self._prepare()
ksp = PETSc.KSP().create(self.pc.comm)
ksp.setType(PETSc.KSP.Type.PREONLY)
self.assertTrue(self.pc.getRefCount() == 1)
ksp.setPC(self.pc)
self.assertTrue(self.pc.getRefCount() == 2)
# normal ksp solve, twice
ksp.solve(x, y)
self.assertTrue(self._getCtx().log['setUp'] == 1)
self.assertTrue(self._getCtx().log['apply'] == 1)
self.assertTrue(self._getCtx().log['preSolve'] == 1)
self.assertTrue(self._getCtx().log['postSolve'] == 1)
ksp.solve(x, y)
self.assertTrue(self._getCtx().log['setUp'] == 1)
self.assertTrue(self._getCtx().log['apply'] == 2)
self.assertTrue(self._getCtx().log['preSolve'] == 2)
self.assertTrue(self._getCtx().log['postSolve'] == 2)
# transpose ksp solve, twice
ksp.solveTranspose(x, y)
self.assertTrue(self._getCtx().log['setUp'] == 1)
self.assertTrue(self._getCtx().log['applyTranspose'] == 1)
ksp.solveTranspose(x, y)
self.assertTrue(self._getCtx().log['setUp'] == 1)
self.assertTrue(self._getCtx().log['applyTranspose'] == 2)
del ksp # ksp.destroy()
PETSc.garbage_cleanup()
self.assertEqual(self.pc.getRefCount(), 1)
def testGetSetContext(self):
self.pc.setPythonContext(self._getCtx())
self.assertEqual(getrefcount(self.pc.getPythonContext()), 2)
class TestPCPYTHON2(TestPCPYTHON):
def setUp(self):
OptDB = PETSc.Options(self.PC_PREFIX)
OptDB['impl'] = 'MyPCJacobi'
super().setUp()
clsname = type(self._getCtx().impl).__name__
self.assertTrue(clsname == OptDB['impl'])
del OptDB['impl']
class TestPCPYTHON3(TestPCPYTHON):
def setUp(self):
pc = self.pc = PETSc.PC()
ctx = PC_PYTHON_CLASS()
pc.createPython(ctx, comm=PETSc.COMM_SELF)
self.pc.prefix = self.PC_PREFIX
self.pc.setFromOptions()
self.assertTrue(self._getCtx().log['create'] == 1)
self.assertTrue(self._getCtx().log['setFromOptions'] == 1)
class TestPCPYTHON4(TestPCPYTHON3):
def setUp(self):
OptDB = PETSc.Options(self.PC_PREFIX)
OptDB['impl'] = 'MyPCJacobi'
super().setUp()
clsname = type(self._getCtx().impl).__name__
self.assertTrue(clsname == OptDB['impl'])
del OptDB['impl']
# --------------------------------------------------------------------
if __name__ == '__main__':
unittest.main()
|
