Python cuda.shared_constructor函数代码示例

    def cmp(a_shp, b_shp):
        a0 = my_rand(*a_shp)
        a = tcn.shared_constructor(a0, 'a')
        cval = my_rand(a_shp[0], b_shp[1])
        c = tcn.shared_constructor(cval.copy(), 'c')

        b = tcn.fmatrix('b')
        b2 = tcn.fmatrix('b2')

        f = pfunc(
                [b, b2],
                [tensor.dot(a, b2) + c],
                updates=[(a, tensor.dot(a, b) + c)],
                mode=mode_with_gpu)

        assert any([node.op == tcn.blas.gpu_gemm_no_inplace
            for node in f.maker.fgraph.toposort()])
        bval = my_rand(*b_shp)
        bval2 = my_rand(*b_shp)
        rval = f(bval, bval2)

        assert numpy.allclose(numpy.dot(a0, bval) + cval, a.get_value())
        assert numpy.allclose(numpy.dot(a0, bval2) + cval, rval)

        # Try with a matrix equal to a0, but with strides in both dims
        a.set_value(a0)
        a.set_value(
                a.get_value(borrow=True,
                    return_internal_type=True)[::-1, ::-1],
                borrow=True)
        f(bval, bval2)

def test_elemwise_composite_support_code():
    """
    This was generating an error at compile time.
    Commit 3d1690fa346103594356ecaeceeb2c6757b45d2b fixed that.
    """
    X = tcn.shared_constructor(value=numpy.zeros((100, 10), dtype="float32"),
                               name='X')
    W = tcn.shared_constructor(value=numpy.zeros((10, 1), dtype="float32"),
                               name='W')
    U = T.dot(X, W)
    Y = tcn.shared_constructor(value=numpy.zeros((100, 1), dtype="float32"),
                               name='Y')
    P = T.exp(-(Y - U) ** 2)
    epsilon = numpy.asarray(0.001, dtype="float32")
    NLL = -T.mean(T.log(P + epsilon))  # SupportCodeError
    G = T.grad(NLL, wrt=[W])

    backup = theano.config.warn.identify_1pexp_bug
    theano.config.warn.identify_1pexp_bug = False
    try:
        f_grad = theano.function(inputs=[], outputs=G, mode=mode_with_gpu)
    finally:
        theano.config.warn.identify_1pexp_bug = backup
    f_grad()

    topo = f_grad.maker.env.toposort()
    assert sum([isinstance(node.op, T.Elemwise) for node in topo]) == 1
    assert sum([isinstance(node.op, tcn.GpuElemwise) for node in topo]) == 1

def test_opt_gpujoin_joinvectors_elemwise_then_minusone():
    # from a bug in gpu normal sampling
    _a = numpy.asarray([1, 2, 3, 4], dtype='float32')
    _b = numpy.asarray([5, 6, 7, 8], dtype='float32')
    a = cuda.shared_constructor(_a)
    b = cuda.shared_constructor(_b)

    a_prime = tensor.cos(a)
    b_prime = tensor.sin(b)

    c = tensor.join(0, a_prime, b_prime)

    d = c[:-1]

    f = theano.function([], d, mode=mode_with_gpu)

    graph_nodes = f.maker.fgraph.toposort()

    assert isinstance(graph_nodes[-1].op, cuda.HostFromGpu)
    assert isinstance(graph_nodes[-2].op, cuda.GpuSubtensor)
    assert isinstance(graph_nodes[-3].op, cuda.GpuJoin)

    concat = numpy.concatenate([numpy.cos(_a), numpy.sin(_b)], axis=0)
    concat = concat[:-1]

    assert numpy.allclose(numpy.asarray(f()), concat)

def test_opt_gpujoin_onlyajoin():
    # from a bug in normal sampling
    _a = numpy.asarray([[1, 2], [3, 4]], dtype='float32')
    _b = numpy.asarray([[5, 6, 7], [8, 9, 10]], dtype='float32')
    a = cuda.shared_constructor(_a)
    b = cuda.shared_constructor(_b)

    c = tensor.join(1, a, b)

    f = theano.function([], c, mode=mode_with_gpu)

    f()

    graph_nodes = f.maker.fgraph.toposort()

    assert isinstance(graph_nodes[-1].op, cuda.HostFromGpu)
    assert isinstance(graph_nodes[-2].op, cuda.GpuJoin)

    assert numpy.all(f() == numpy.concatenate([_a, _b], axis=1))

    # test mixed dtype
    _b = numpy.asarray([[5, 6, 7], [8, 9, 10]], dtype='float64')
    b = theano.tensor.constant(_b)

    c = tensor.join(1, a, b)

    f = theano.function([], c, mode=mode_with_gpu)

    f()

    graph_nodes = f.maker.fgraph.toposort()
    assert isinstance(graph_nodes[-1].op, theano.tensor.Join)

    assert numpy.all(f() == numpy.concatenate([_a, _b], axis=1))

def test_pool():
    #(batch, channel, x, y)
    shps = [(1, 1, 2, 2),
             ]
    shps = [(channel, x, y, batch) for (batch, channel, x, y) in shps]

    #numpy.random.RandomState(unittest_tools.fetch_seed()).shuffle(shps)
    warnings.warn("TODO: Razvan needs to finish this")
    for shp in shps:
        for ds in range(1, min(4, shp[2] + 1)):
            for start in [0]:
                for stride in range(1, min(shp[2], ds, 4) + 1):
                    #print 'test_pool shape=%s, ds=%d, stride=%d start=%d' % (
                    #    str(shp), ds, stride, start)

                    va = my_rand(*shp)
                    tva = va.flatten()
                    #print 'va', tva, tva.max(), tva.argmax()

                    vb = my_rand(*shp)
                    tvb = vb.flatten()
                    #print 'vb', tvb, tvb.max(), tvb.argmax(),\
                    #                tvb[tva.argmax()]
                    a = tcn.shared_constructor(va, 'a')
                    b = tcn.shared_constructor(vb, 'b')
                    op = MaxPool(ds=ds, stride=stride)
                    v = op(a)
                    rval = theano.tensor.Rop(v, a, b)
                    f = theano.function([], rval,
                                        mode=mode_with_gpu)
                    print f.maker.fgraph.toposort()
                    #ssert any([isinstance(node.op, MaxPool)
                    #   for node in f.maker.fgraph.toposort()])
                    out = numpy.asarray(f())

def test_gpujoin_preserves_broadcasting():
    _a = numpy.asarray([[1, 2], [3, 4]], dtype="float32")
    _b = numpy.asarray([[5, 6, 7], [8, 9, 10]], dtype="float32")
    a = tcn.shared_constructor(_a)
    b = tcn.shared_constructor(_b)

    # [0,0] : the two original dims were non-broadcastable
    # [1,x,0]: new order and broadcastability
    gpu_dimshuffle = GpuDimShuffle([0, 0], [1, "x", 0])

    a_shuffled = gpu_dimshuffle(a)
    b_shuffled = gpu_dimshuffle(b)

    c = gpu_join(0, a_shuffled, b_shuffled)

    assert c.type.broadcastable == (False, True, False)

    f = theano.function([], c, mode=mode_with_gpu)

    res = f()

    a_reshaped = numpy.asarray([[[1, 3]], [[2, 4]]], dtype="float32")
    b_reshaped = numpy.asarray([[[5, 8]], [[6, 9]], [[7, 10]]], dtype="float32")

    concat = numpy.concatenate([a_reshaped, b_reshaped], axis=0)

    assert numpy.all(res == concat)

def test_elemwise2():
    """ Several kinds of elemwise expressions with dimension permutations """
    rng = numpy.random.RandomState(int(time.time()))
    shape = (3, 5)
    for pattern in [(0, 1), (1, 0)]:
        a = tcn.shared_constructor(theano._asarray(rng.rand(*shape),
                                                   dtype='float32'), name=None)
        b = tensor.Tensor(dtype='float32', broadcastable=[0] * len(shape))()
        f = pfunc([b], [], updates=[(a, (a + b).dimshuffle(pattern))],
                  mode=mode_with_gpu)
        has_elemwise = False
        for i, node in enumerate(f.maker.env.toposort()):
            has_elemwise = has_elemwise or isinstance(node.op, tensor.Elemwise)
        assert not has_elemwise
        #let debugmode catch errors
        f(theano._asarray(rng.rand(*shape), dtype='float32') * .3)

    shape = (3, 4, 5, 6)
    a = tcn.shared_constructor(theano._asarray(rng.rand(*shape),
                                               dtype='float32'), 'a')
    b = tensor.Tensor(dtype='float32', broadcastable=[0] * len(shape))()
    f = pfunc([b], [], updates=[(a, (a + b).dimshuffle([2, 0, 3, 1]) *
        tensor.exp(b ** a).dimshuffle([2, 0, 3, 1]))], mode=mode_with_gpu)
    has_elemwise = False
    for i, node in enumerate(f.maker.env.toposort()):
        has_elemwise = has_elemwise or isinstance(node.op, tensor.Elemwise)
    assert not has_elemwise
    #let debugmode catch errors
    f(theano._asarray(rng.rand(*shape), dtype='float32'))

def test_nvidia_driver2():
    """ Test that the gpu device is initialized by theano when
        we manually make a shared variable on the gpu.

        The driver should always be tested during theano initialization
        of the gpu device
    """
    a = numpy.random.rand(10000).astype("float32")
    cuda.shared_constructor(a)
    assert theano.sandbox.cuda.use.device_number is not None

def test_gpujoin_twomatrices_joincolumns():
    _a = numpy.asarray([[1, 2], [3, 4]], dtype="float32")
    _b = numpy.asarray([[5, 6, 7], [8, 9, 10]], dtype="float32")
    a = tcn.shared_constructor(_a)
    b = tcn.shared_constructor(_b)

    c = gpu_join(1, a, b)

    f = theano.function([], c)

    assert numpy.all(f() == numpy.concatenate([_a, _b], axis=1))

def run_nnet(use_gpu, n_batch=60, n_in=1024, n_hid=2048, n_out=10,
             n_train=100):

    if config.mode == 'DEBUG_MODE':
        n_train = 1

    if use_gpu:
        w = tcn.shared_constructor(0.01 * (my_rand(n_in, n_hid) - 0.5), 'w')
        b = tcn.shared_constructor(my_zeros(n_hid), 'b')
        v = tcn.shared_constructor(my_zeros((n_hid, n_out)), 'c')
        c = tcn.shared_constructor(my_zeros(n_out), 'c')
    else:
        w = shared(0.01 * (my_rand(n_in, n_hid) - 0.5), 'w')
        b = shared(my_zeros(n_hid), 'b')
        v = shared(my_zeros((n_hid, n_out)), 'c')
        c = shared(my_zeros(n_out), 'c')

    x = tensor.fmatrix('x')
    y = tensor.fmatrix('y')
    lr = tensor.fscalar('lr')

    hid = tensor.tanh(tensor.dot(x, w) + b)
    out = tensor.tanh(tensor.dot(hid, v) + c)
    loss = tensor.sum(0.5 * (out - y) ** 2 * lr)
    if 0:
        print('loss type', loss.type)

    params = [w, b, v, c]
    gparams = tensor.grad(loss, params)

    mode = get_mode(use_gpu)

    # print 'building pfunc ...'
    train = pfunc([x, y, lr], [loss], mode=mode,
                  updates=[(p, p - g) for p, g in izip(params, gparams)])

    if 0:
        for i, n in enumerate(train.maker.fgraph.toposort()):
            print(i, n)

    xval = my_rand(n_batch, n_in)
    yval = my_rand(n_batch, n_out)
    lr = theano._asarray(0.01, dtype='float32')

    t0 = time.time()
    rval = []
    for i in xrange(n_train):
        rval.append(train(xval, yval, lr))
    dt = time.time() - t0

    print_mode(mode)
    return numpy.asarray(rval), dt

def test_memory_lazy():
    """As test_memory, but with the ifelse op.

    We need to test it as the ifelse op with the [c]vm create op not
    executed in the graph. This mess with [c]vm gc implementation.
    """
    shapes = (50, 100)
    # more_alloc1 is not the same for both dtype.
    # when dtype is float32, the computation is done on the gpu.
    # This insert constant on the gpu during compilation
    # that raise the number of alloc.
    # When dtype is float64, only the shared is on the gpu and it is transferd
    # to the cpu for computation. So no extra alloc after compilation.
    # more_alloc1 if after the first compilation
    for dtype, more_alloc1 in [("float32", 1),
                               ("float64", 0)]:
        print(dtype)
        test_params = np.asarray(np.random.randn(np.prod(shapes)), dtype)

        some_vector = tensor.vector('some_vector', dtype=dtype)
        some_matrix = some_vector.reshape(shapes)
        branch_select = tensor.iscalar()

        mem1 = freemem()
        print("Before shared variable", mem1)
        variables = cuda.shared_constructor(np.ones((shapes[1],),
                                                    dtype='float32'))
        derp = tensor.sum(tensor.dot(some_matrix[:shapes[0]], variables))
        derp = ifelse.IfElse(1)(branch_select,
                                derp, some_matrix[:shapes[0]].sum())
        derp += 1
        print("Shared took ", np.prod(variables.get_value(
                borrow=True,
                return_internal_type=True).shape) * 4 / 1024, "kB")

        mem2 = freemem()
        print("Before compilation", mem2)
        mem2_1 = freemem(extra_alloc=more_alloc1)
        obj = theano.function([some_vector, branch_select], derp,
                              mode=mode_with_gpu)
        #theano.printing.debugprint(obj, print_type=True)
        mem3 = freemem()
        print("After function compilation 1", mem3)
        assert mem2_1 == mem3, (mem2_1, mem3)

        for i in range(3):
            obj(test_params, 1)
            print("After function evaluation branch true", freemem())
            assert mem2_1 == freemem(), (mem2_1, freemem())
            obj(test_params, 0)
            print("After function evaluation branch false", freemem())
            assert mem2_1 == freemem(), (mem2_1, freemem())

        del obj
        print("After deleting function 1", freemem())
        assert mem2 == freemem(), (mem2, freemem())

        del derp, variables
        print("After deleting shared variable and ref to it", freemem())
        assert mem1 == freemem(), (mem1, freemem())

def test_elemwise1():
    """ Several kinds of elemwise expressions with no broadcasting,
    non power-of-two shape """

    shape = (3, 4)
    a = tcn.shared_constructor(theano._asarray(numpy.random.rand(*shape),
                                               dtype='float32') + 0.5, 'a')
    b = tensor.fmatrix()

    #let debugmode catch any mistakes
    print >> sys.stdout, "STARTING FUNCTION 1"
    f = pfunc([b], [], updates=[(a, b ** a)], mode=mode_with_gpu)
    for i, node in enumerate(f.maker.env.toposort()):
        print i, node
    f(theano._asarray(numpy.random.rand(*shape), dtype='float32') + 0.3)

    print >> sys.stdout, "STARTING FUNCTION 2"
    #let debugmode catch any mistakes
    f = pfunc([b], [], updates=[(a, tensor.exp(b ** a))], mode=mode_with_gpu)
    for i, node in enumerate(f.maker.env.toposort()):
        print i, node
    f(theano._asarray(numpy.random.rand(*shape), dtype='float32') + 0.3)

    print >> sys.stdout, "STARTING FUNCTION 3"
    #let debugmode catch any mistakes
    f = pfunc([b], [], updates=[(a, a + b * tensor.exp(b ** a))],
              mode=mode_with_gpu)
    f(theano._asarray(numpy.random.rand(*shape), dtype='float32') + 0.3)

    def cmp(a_shp, b_shp):
        a0 = my_rand(*a_shp)
        a = tcn.shared_constructor(a0, 'a')

        b = tensor.fmatrix('b')
        c = tensor.fmatrix('c')

        f = pfunc([b, c], [], updates=[(a, tensor.dot(a, b) + tensor.exp(c))],
                mode=mode_with_gpu)
        assert any([node.op == tcn.blas.gpu_gemm_inplace
            for node in f.maker.env.toposort()])

        bval = my_rand(*b_shp)
        cval = my_rand(a_shp[0], b_shp[1])
        f(bval, cval)

        assert numpy.allclose(numpy.dot(a0, bval) + numpy.exp(cval),
                a.get_value())

        # Try with a matrix equal to a0, but with strides in both dims
        a.set_value(a0)
        a.set_value(
                a.get_value(borrow=True,
                    return_internal_type=True)[::-1, ::-1],
                borrow=True)
        f(bval, cval)

def test_downsample():
    shps = [
        (1, 1, 1, 12),
        (1, 1, 2, 2),
        (1, 1, 1, 1),
        (1, 1, 4, 4),
        (1, 1, 10, 11),
        (1, 2, 2, 2),
        (3, 5, 4, 4),
        (25, 1, 7, 7),
        (1, 1, 12, 12),
        (1, 1, 2, 14),
        (1, 1, 12, 14),
        (1, 1, 14, 14),
        (1, 1, 16, 16),
        (1, 1, 18, 18),
        (1, 1, 24, 24),
        (1, 6, 24, 24),
        (10, 1, 24, 24),
        (10, 6, 24, 24),
        (30, 6, 12, 12),
        (30, 2, 24, 24),
        (30, 6, 24, 24),
        (10, 10, 10, 11),
        (1, 1, 10, 1025),
        (1, 1, 10, 1023),
        (1, 1, 1025, 10),
        (1, 1, 1023, 10),
    ]

    numpy.random.RandomState(unittest_tools.fetch_seed()).shuffle(shps)

    for shp in shps:
        for ds in (2, 2), (3, 2), (1, 1):
            if ds[0] > shp[2]:
                continue
            if ds[1] > shp[3]:
                continue
            # GpuDownsampleFactorMax doesn't like having more than 512 columns
            # in the output tensor.
            if float(shp[3]) / ds[1] > 512:
                continue
            for ignore_border in (True, False):
                print "test_downsample", shp, ds, ignore_border
                ds_op = DownsampleFactorMax(ds, ignore_border=ignore_border)

                a = tcn.shared_constructor(my_rand(*shp), "a")
                f = pfunc([], ds_op(tensor.as_tensor_variable(a)), mode=mode_with_gpu)
                f2 = pfunc([], ds_op(tensor.as_tensor_variable(a)), mode=mode_without_gpu)
                assert any([isinstance(node.op, tcn.blas.GpuDownsampleFactorMax) for node in f.maker.env.toposort()])
                assert any([isinstance(node.op, DownsampleFactorMax) for node in f2.maker.env.toposort()])
                assert numpy.allclose(f(), f2())

                g = pfunc([], tensor.grad(ds_op(tensor.as_tensor_variable(a)).sum(), a), mode=mode_with_gpu)
                g2 = pfunc([], tensor.grad(ds_op(tensor.as_tensor_variable(a)).sum(), a), mode=mode_without_gpu)
                assert any(
                    [isinstance(node.op, tcn.blas.GpuDownsampleFactorMaxGrad) for node in g.maker.env.toposort()]
                )
                assert any([isinstance(node.op, DownsampleFactorMaxGrad) for node in g2.maker.env.toposort()])
                assert numpy.allclose(g(), g2())

def test_gpuspecifyshape():
    x = cuda.shared_constructor(numpy.ones(3, dtype='float32'), 'x')
    m = theano.tensor.specify_shape(x + numpy.float32(1), (3,))
    f = theano.function([], updates=[(x, m * numpy.float32(2))],
                        mode=mode_with_gpu)
    l = f.maker.fgraph.toposort()
    assert not numpy.any([isinstance(x.op, cuda.HostFromGpu) for x in l])