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init #2322

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merged 3 commits into from
Jul 25, 2024
Merged

init #2322

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6268443
init
vmoens Jul 25, 2024
1420edc
fix
vmoens Jul 25, 2024
c3b5276
init
vmoens Jul 25, 2024
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init
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@vmoens
vmoens committed Jul 25, 2024
commit 6268443634f7d9ff16e2ff653b6580c18a178a6b
17 changes: 16 additions & 1 deletion torchrl/modules/models/multiagent.py
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Original file line number Diff line number Diff line change
Expand Up @@ -70,8 +70,23 @@ def __init__(
break
self.initialized = initialized
self._make_params(agent_networks)
# We make sure all params and buffers are on 'meta' device
# To do this, we set the device keyword arg to 'meta', we also temporarily change
# the default device. Finally, we convert all params to 'meta' tensors that are not params.
kwargs["device"] = "meta"
self.__dict__["_empty_net"] = self._build_single_net(**kwargs)
with torch.device("meta"):
try:
self._empty_net = self._build_single_net(**kwargs)
except NotImplementedError as err:
if "Cannot copy out of meta tensor" in str(err):
raise RuntimeError(
"The network was built using `factory().to(device), build the network directly "
"on device using `factory(device=device)` instead."
)
# Remove all parameters
TensorDict.from_module(self._empty_net).data.to("meta").to_module(
self._empty_net
)

@property
def vmap_randomness(self):
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