[Feature] Add more supports for NPU in addition to CUDA in previously supported use cases.

test/test_compile.py

@@ -7,12 +7,15 @@
 import importlib.util
 import inspect
 import platform
+import sys
 from pathlib import Path
 from typing import Any, Callable
 
 import pytest
 
 import torch
+
+from _utils_internal import is_npu_available
 from packaging import version
 
 from tensordict import (
@@ -50,7 +53,17 @@
 
 _IS_OSX = platform.system() == "Darwin"
 
+npu_device_count = 0
+if torch.cuda.is_available():
+    cur_device = "cuda"
+elif is_npu_available():
+    cur_device = "npu"
+    npu_device_count = torch.npu.device_count()
+
 
+@pytest.mark.skipif(
+    sys.version_info > (3, 14), reason="torch.compile is not supported on python 3.14+ "
+)
 def test_vmap_compile():
     # Since we monkey patch vmap we need to make sure compile is happy with it
     def func(x, y):
@@ -67,6 +80,9 @@ def func(x, y):
 @pytest.mark.skipif(
     TORCH_VERSION < version.parse("2.4.0"), reason="requires torch>=2.4"
 )
+@pytest.mark.skipif(
+    sys.version_info > (3, 14), reason="torch.compile is not supported on python 3.14+ "
+)
 @pytest.mark.parametrize("mode", [None, "reduce-overhead"])
 class TestTD:
     def test_tensor_output(self, mode):
@@ -266,7 +282,7 @@ def make_td_with_names(data):
     )
     @pytest.mark.parametrize("has_device", [True, False])
     def test_to(self, has_device, mode):
-        device = "cuda:0"
+        device = f"{cur_device}:0"
 
         def test_to_device(td):
             return td.to(device)
@@ -283,6 +299,10 @@ def test_to_device(td):
         assert td_device_c.batch_size == td.batch_size
         assert td_device_c.device == torch.device(device)
 
+    @pytest.mark.skipif(
+        is_npu_available(),
+        reason="torch.device in torch.compile is not supported on NPU currently.",
+    )
     def test_lock(self, mode):
         def locked_op(td):
             # Adding stuff uses cache, check that this doesn't break
@@ -357,6 +377,9 @@ class MyClass:
 @pytest.mark.skipif(
     TORCH_VERSION < version.parse("2.4.0"), reason="requires torch>=2.4"
 )
+@pytest.mark.skipif(
+    sys.version_info > (3, 14), reason="torch.compile is not supported on python 3.14+ "
+)
 @pytest.mark.parametrize("mode", [None, "reduce-overhead"])
 class TestTC:
     def test_tc_tensor_output(self, mode):
@@ -553,7 +576,7 @@ def clone(td: TensorDict):
     )
     @pytest.mark.parametrize("has_device", [True, False])
     def test_tc_to(self, has_device, mode):
-        device = "cuda:0"
+        device = f"{cur_device}:0"
 
         def test_to_device(tc):
             return tc.to(device)
@@ -570,6 +593,10 @@ def test_to_device(tc):
         assert tc_device_c.batch_size == data.batch_size
         assert tc_device_c.device == torch.device(device)
 
+    @pytest.mark.skipif(
+        is_npu_available(),
+        reason="torch.device in torch.compile is not supported on NPU currently.",
+    )
     def test_tc_lock(self, mode):
         def locked_op(tc):
             # Adding stuff uses cache, check that this doesn't break
@@ -621,6 +648,9 @@ def func_c_mytd():
 @pytest.mark.skipif(
     TORCH_VERSION < version.parse("2.4.0"), reason="requires torch>=2.4"
 )
+@pytest.mark.skipif(
+    sys.version_info > (3, 14), reason="torch.compile is not supported on python 3.14+ "
+)
 @pytest.mark.parametrize("mode", [None, "reduce-overhead"])
 class TestNN:
     def test_func(self, mode):
@@ -725,6 +755,9 @@ def test_prob_module_with_kwargs(self, mode):
 @pytest.mark.skipif(
     TORCH_VERSION <= version.parse("2.4.0"), reason="requires torch>2.4"
 )
+@pytest.mark.skipif(
+    sys.version_info > (3, 14), reason="torch.compile is not supported on python 3.14+ "
+)
 @pytest.mark.parametrize("mode", [None, "reduce-overhead"])
 class TestFunctional:
     def test_functional_error(self, mode):
@@ -1023,6 +1056,9 @@ def to_numpy(tensor):
     (TORCH_VERSION <= version.parse("2.7.0")) and _IS_OSX,
     reason="requires torch>=2.7 ons OSX",
 )
+@pytest.mark.skipif(
+    sys.version_info > (3, 14), reason="torch.compile is not supported on python 3.14+ "
+)
 @pytest.mark.parametrize("compiled", [False, True])
 class TestCudaGraphs:
     @pytest.fixture(scope="class", autouse=True)
@@ -1247,7 +1283,7 @@ class TestCompileNontensor:
     # Same issue with the decorator @tensorclass version
     @pytest.fixture(scope="class")
     def data(self):
-        return torch.zeros((4, 3), device="cuda")
+        return torch.zeros((4, 3), device=cur_device)
 
     class TensorClassWithNonTensorData(TensorClass["nocast"]):
         tensor: torch.Tensor
@@ -1265,13 +1301,13 @@ def fn_no_device(self, data):
 
     def fn_with_device(self, data):
         a = self.TensorClassWithNonTensorData(
-            tensor=data, non_tensor_data=1, batch_size=[4], device="cuda"
+            tensor=data, non_tensor_data=1, batch_size=[4], device=cur_device
         )
         return a.tensor
 
     def fn_with_device_without_batch_size(self, data):
         a = self.TensorClassWithNonTensorData(
-            tensor=data, non_tensor_data=1, device="cuda"
+            tensor=data, non_tensor_data=1, device=cur_device
         )
         return a.tensor
 

test/test_distributed.py

@@ -11,6 +11,7 @@
 import pytest
 import torch
 from _pytest.fixtures import fixture
+from _utils_internal import is_npu_available
 from packaging import version
 
 from packaging.version import parse
@@ -107,6 +108,70 @@ def test_fsdp_module(self, tmpdir):
         assert (TensorDict.load_memmap(tmpdir) == 1).all()
 
 
+@pytest.mark.skipif(
+    not is_npu_available() or not torch.npu.device_count() > 2,
+    reason="not enough npu devices",
+)
+class TestNPUFSDP:
+    class MyDModule(nn.Module):
+        def __init__(self):
+            super().__init__()
+            self.fc1 = nn.Linear(8, 8, bias=False)
+            self.fc2 = nn.Linear(8, 8, bias=False)
+            self.relu = nn.ReLU()
+            for p in self.parameters():
+                p.data.fill_(1.0)
+
+        def forward(self, input):
+            return self.relu(self.fc1(input) + self.fc2(input))
+
+    @classmethod
+    def make_module(cls, device=None):
+        with (
+            torch.device(f"npu:{device}") if device is not None else torch.device("npu")
+        ):
+            my_module = cls.MyDModule()
+            my_sharded_module = FSDP(my_module, device_id=device)
+        return my_sharded_module
+
+    @classmethod
+    def worker(cls, rank, path):
+        os.environ["MASTER_ADDR"] = "localhost"
+        os.environ["MASTER_PORT"] = "10017"
+
+        torch.distributed.init_process_group(
+            "hccl",
+            rank=rank,
+            world_size=2,
+            init_method="tcp://localhost:10017",
+        )
+        torch.npu.set_device(rank)
+        module = cls.make_module(rank)
+        dist.barrier()
+        # cfg = FullStateDictConfig(offload_to_cpu=True, rank0_only=True)
+        # with FSDP.state_dict_type(module, StateDictType.SHARDED_STATE_DICT): #, cfg):
+        #     tdlogger.info(module.state_dict())
+
+        # td = TensorDict(module.state_dict(), []).unflatten_keys(".")
+        td = TensorDict.from_module(module, use_state_dict=True)
+        if rank == 0:
+            td.memmap(path)
+        dist.destroy_process_group()
+
+    def test_fsdp_module(self, tmpdir):
+        try:
+            mp.set_start_method("spawn")
+        except Exception:
+            tdlogger.info("start method already set to", mp.get_start_method())
+        proc0 = mp.Process(target=self.worker, args=(0, tmpdir))
+        proc1 = mp.Process(target=self.worker, args=(1, tmpdir))
+        proc0.start()
+        proc1.start()
+        proc0.join(timeout=TIMEOUT)
+        proc1.join(timeout=TIMEOUT)
+        assert (TensorDict.load_memmap(tmpdir) == 1).all()
+
+
 # not using TorchVersion to make the comparison work with dev
 TORCH_VERSION = version.parse(version.parse(torch.__version__).base_version)
 

test/test_nn.py

@@ -17,6 +17,7 @@
 
 import pytest
 import torch
+from _utils_internal import is_npu_available
 
 from tensordict import (
     is_tensor_collection,
@@ -81,7 +82,6 @@
 except ImportError:
     from tensordict.utils import Buffer
 
-
 IS_FB = os.getenv("PYTORCH_TEST_FBCODE")
 
 # Capture all warnings
@@ -112,6 +112,17 @@
     )
 
 
+def get_device():
+    device = torch.device("cpu")
+    if torch.cuda.is_available():
+        device = torch.device("cuda:0")
+    elif is_npu_available():
+        device = torch.device("npu:0")
+    elif torch.mps.is_available():
+        device = torch.device("mps:0")
+    return device
+
+
 class TestInteractionType:
     def test_base(self):
         with set_interaction_type("DETERMINISTIC"):
@@ -2149,37 +2160,24 @@ def test_module_buffer():
     if torch.cuda.device_count():
         module.cuda()
         assert module.td.device.type == "cuda"
+    elif is_npu_available():
+        module = module.to("npu:0")
+        assert module.td.device.type == "npu"
 
 
 @pytest.mark.parametrize(
     "original_device",
     [
         None,
         torch.device("cpu"),
-        (
-            torch.device("cuda:0")
-            if torch.cuda.is_available()
-            else (
-                torch.device("mps:0")
-                if torch.mps.is_available()
-                else torch.device("cpu")
-            )
-        ),
+        get_device(),
     ],
 )
 @pytest.mark.parametrize(
     "new_device",
     [
         torch.device("cpu"),
-        (
-            torch.device("cuda:0")
-            if torch.cuda.is_available()
-            else (
-                torch.device("mps:0")
-                if torch.mps.is_available()
-                else torch.device("cpu")
-            )
-        ),
+        get_device(),
     ],
 )
 @pytest.mark.parametrize("tc", [True, False], ids=["tc", "td"])

test/test_tensorclass.py

@@ -26,6 +26,7 @@
 import pytest
 import tensordict.utils
 import torch
+from _utils_internal import is_npu_available
 
 from tensordict import (
     assert_allclose_td,
@@ -45,6 +46,7 @@
 from tensordict._td import lazy_stack
 from tensordict.base import _GENERIC_NESTED_ERR
 from tensordict.tensorclass import from_dataclass
+
 from torch import Tensor
 
 _has_streaming = importlib.util.find_spec("streaming", None) is not None
@@ -2566,6 +2568,8 @@ def test_to(self):
         td = self.get_nested()
         if torch.cuda.is_available():
             device = torch.device("cuda:0")
+        elif is_npu_available():
+            device = torch.device("npu:0")
         else:
             device = torch.device("cpu:1")
         td_device = td.to(device)