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fix single pserver single trainer error #9558

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merged 1 commit into from
Apr 2, 2018
Merged

fix single pserver single trainer error #9558

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28 changes: 18 additions & 10 deletions python/paddle/fluid/distribute_transpiler.py
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Original file line number Diff line number Diff line change
Expand Up @@ -276,20 +276,25 @@ def get_pserver_program(self, endpoint):
suff_idx = v.name.find(".trainer_")
if suff_idx >= 0:
orig_var_name = v.name[:suff_idx]
pserver_program.global_block().create_var(
else:
orig_var_name = v.name
single_trainer_var = pserver_program.global_block().create_var(
name=orig_var_name,
persistable=True,
type=v.type,
dtype=v.dtype,
shape=v.shape)
for trainer_id in xrange(self.trainers):
var = pserver_program.global_block().create_var(
name="%s.trainer_%d" % (orig_var_name, trainer_id),
persistable=False,
type=v.type,
dtype=v.dtype,
shape=v.shape)
recv_inputs.append(var)
if self.trainers > 1:
for trainer_id in xrange(self.trainers):
var = pserver_program.global_block().create_var(
name="%s.trainer_%d" % (orig_var_name, trainer_id),
persistable=False,
type=v.type,
dtype=v.dtype,
shape=v.shape)
recv_inputs.append(var)
else:
recv_inputs.append(single_trainer_var)

# step3
optimize_block = pserver_program.create_block(0)
Expand Down Expand Up @@ -511,8 +516,11 @@ def _clone_var(self, block, var):

def _append_split_op(self, program, gradblocks):
# Split variables that need to be split and append respective ops
add_suffix = False
if self.trainers > 1:
add_suffix = True
var_mapping = self._create_vars_from_blocklist(
program, gradblocks, add_trainer_suffix=True)
program, gradblocks, add_trainer_suffix=add_suffix)
for varname, splited_vars in var_mapping.iteritems():
# variable that don't need to split have empty splited_vars
if len(splited_vars) <= 1:
Expand Down