def test_toposort():
tf.reset_default_graph()
nodes = util.make_caterpillar_graph(length=2)
graph = linearize_lib.get_graph()
initial = list(toposort(graph))[0]
assert len(initial) == 1
assert list(initial)[0].name == 'merge2'
def test_toposort(): tf.reset_default_graph() nodes = util.make_caterpillar_graph(length=2) graph = linearize_lib.get_graph() initial = list(toposort(graph))[0] assert len(initial) == 1 assert list(initial)[0].name == 'merge2'
def test_prune():
tf.reset_default_graph()
a = tf.constant([1, 2, 3])
b = tf.constant([4, 5, 6])
c = a + b
d = tf.constant([7, 8, 9])
e = tf.constant([7, 8, 9])
graph = linearize_lib.get_graph()
pruned = linearize_lib.prune_graph(graph, [c, d])
assert a.op in pruned
assert e.op not in pruned
def test_prune(): tf.reset_default_graph() a = tf.constant([1,2,3]) b = tf.constant([4,5,6]) c = a + b d = tf.constant([7,8,9]) e = tf.constant([7,8,9]) graph = linearize_lib.get_graph() pruned = linearize_lib.prune_graph(graph, [c, d]) assert a.op in pruned assert e.op not in pruned
def test_print(): """Should print: leaf1 -> merge1 leaf0 -> merge0 merge1 -> merge2 merge0 -> merge1 leaf2 -> merge2 leaf0/shape -> leaf0 leaf1/shape -> leaf1 leaf2/shape -> leaf2 """ nodes = make_caterpillar_graph(length=2) linearize.print_tf_graph(linearize.get_graph())
def test_print():
"""Should print:
leaf1 -> merge1
leaf0 -> merge0
merge1 -> merge2
merge0 -> merge1
leaf2 -> merge2
leaf0/shape -> leaf0
leaf1/shape -> leaf1
leaf2/shape -> leaf2
"""
nodes = make_caterpillar_graph(length=2)
linearize.print_tf_graph(linearize.get_graph())
def test_print():
"""Should print:
leaf1 -> merge1
leaf0 -> merge0
merge1 -> merge2
merge0 -> merge1
leaf2 -> merge2
leaf0/shape -> leaf0
leaf1/shape -> leaf1
leaf2/shape -> leaf2
"""
tf.reset_default_graph()
nodes = util.make_caterpillar_graph(length=2)
linearize_lib.print_graph(linearize_lib.get_graph())
def test_print(): """Should print: leaf1 -> merge1 leaf0 -> merge0 merge1 -> merge2 merge0 -> merge1 leaf2 -> merge2 leaf0/shape -> leaf0 leaf1/shape -> leaf1 leaf2/shape -> leaf2 """ tf.reset_default_graph() nodes = util.make_caterpillar_graph(length=2) linearize_lib.print_graph(linearize_lib.get_graph())
def recompute_tensor(target, known_values, preceding_op=None,
copy_known_values=False):
"""Computes target tensor from known_values. If preceding_op is not None,
adds necessary control dependencies such that newly created computation takes
place after preceding_op.
If copy_known_values is set, also copies known_values (for nicer graph
visualization)
"""
assert is_computable(target, known_values)
# position of target in parent op
target_pos = list(target.op.outputs).index(target)
if copy_known_values:
computation = ge.get_backward_walk_ops(target)
else:
computation = ge.get_backward_walk_ops(target, stop_at_ts=known_values)
# create copy of computation
copied_sgv, info = ge.copy_with_input_replacements(ge.sgv(computation), {})
# find our target tensor in the new computation
new_target_op = info._transformed_ops[target.op]
new_target = new_target_op.outputs[target_pos]
new_computation = list(info._transformed_ops.values())
# restrict computation to run after given op
SAVE_ON_CONTROL_EDGES = True
if SAVE_ON_CONTROL_EDGES:
# only add "run_after" control dependencies to root of computation,
# the rest automatically runs after because of data dependencies
# TODO: more efficient implementation by walking back from new_target
# instead of whole graph
computation_graph = linearize_lib.get_graph(restrict_to=new_computation)
# note, toposort order is reversed from networkx/mine convention
computation_root = list(toposort.toposort(computation_graph))[-1]
for op in computation_root:
run_after(op, preceding_op)
else:
if preceding_op is not None:
for op in info._transformed_ops.values():
run_after(op, preceding_op)
return new_target
def test_reversed_graph():
tf.reset_default_graph()
a = tf.constant([1, 2, 3])
c = tf.constant([4, 5, 6])
result = tf.nn.top_k(a)
b = result[0] + result[1] + c
d = tf.constant([7, 8, 9])
graph = linearize_lib.get_graph()
# graph looks like this
"""Const -> TopKV2
Const_1 -> add_1
Const_2
TopKV2 -> add
TopKV2/k -> TopKV2
add -> add_1
add_1
"""
nodes = list(graph.keys())
assert nodes[0].name == 'Const'
assert nodes[-1].name == 'add_1'
assert list(graph[nodes[0]])[0].name == 'TopKV2'
graph = linearize_lib.reversed_graph(graph, deterministic=True)
# graph looks like this
"""TopKV2 -> Const
TopKV2 -> TopKV2/k
Const
add_1 -> Const_1
add_1 -> add
Const_1
add -> TopKV2
TopKV2/k
Const_2
"""
nodes = list(graph.keys())
assert nodes[0].name == 'TopKV2'
assert nodes[-1].name == 'Const_2'
assert list(graph[nodes[0]])[0].name == 'Const'
def test_reversed_graph(): tf.reset_default_graph() a = tf.constant([1,2,3]) c = tf.constant([4,5,6]) result = tf.nn.top_k(a) b = result[0]+result[1]+c d = tf.constant([7,8,9]) graph = linearize_lib.get_graph() # graph looks like this """Const -> TopKV2 Const_1 -> add_1 Const_2 TopKV2 -> add TopKV2/k -> TopKV2 add -> add_1 add_1 """ nodes = list(graph.keys()) assert nodes[0].name == 'Const' assert nodes[-1].name == 'add_1' assert list(graph[nodes[0]])[0].name == 'TopKV2' graph = linearize_lib.reversed_graph(graph, deterministic=True) # graph looks like this """TopKV2 -> Const TopKV2 -> TopKV2/k Const add_1 -> Const_1 add_1 -> add Const_1 add -> TopKV2 TopKV2/k Const_2 """ nodes = list(graph.keys()) assert nodes[0].name == 'TopKV2' assert nodes[-1].name == 'Const_2' assert list(graph[nodes[0]])[0].name == 'Const'
def test_toposort(): nodes = make_caterpillar_graph(length=2) graph = linearize.get_graph() print(list(toposort.toposort(graph)))
def test_toposort():
nodes = make_caterpillar_graph(length=2)
graph = linearize.get_graph()
print(list(toposort.toposort(graph)))