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https://github.com/zebrajr/pytorch.git
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1ce7969e81
This reverts commit90c5b86cd8. Reverted https://github.com/pytorch/pytorch/pull/151404 on behalf of https://github.com/clee2000 due to broke a cpp extension test? test_cpp_extensions_stream_and_event.py::TestCppExtensionStreamAndEvent::test_stream_event [GH job link](https://github.com/pytorch/pytorch/actions/runs/14519277500/job/40736981315) [HUD commit link](90c5b86cd8), bad TD ([comment](https://github.com/pytorch/pytorch/pull/151404#issuecomment-2813649667))
118 lines
5.0 KiB
Python
118 lines
5.0 KiB
Python
# Owner(s): ["module: tests"]
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import sys
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import unittest
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import torch
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from torch.testing._internal.common_utils import NoTest, run_tests, TEST_MPS, TestCase
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if not torch.accelerator.is_available():
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print("No available accelerator detected, skipping tests", file=sys.stderr)
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TestCase = NoTest # noqa: F811
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# Skip because failing when run on cuda build with no GPU, see #150059 for example
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sys.exit()
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TEST_MULTIACCELERATOR = torch.accelerator.device_count() > 1
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class TestAccelerator(TestCase):
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def test_current_accelerator(self):
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self.assertTrue(torch.accelerator.is_available())
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accelerators = ["cuda", "xpu", "mps"]
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for accelerator in accelerators:
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if torch.get_device_module(accelerator).is_available():
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self.assertEqual(
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torch.accelerator.current_accelerator().type, accelerator
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)
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self.assertIsNone(torch.accelerator.current_accelerator().index)
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with self.assertRaisesRegex(
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ValueError, "doesn't match the current accelerator"
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):
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torch.accelerator.set_device_index("cpu")
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@unittest.skipIf(not TEST_MULTIACCELERATOR, "only one accelerator detected")
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def test_generic_multi_device_behavior(self):
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orig_device = torch.accelerator.current_device_index()
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target_device = (orig_device + 1) % torch.accelerator.device_count()
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torch.accelerator.set_device_index(target_device)
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self.assertEqual(target_device, torch.accelerator.current_device_index())
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torch.accelerator.set_device_index(orig_device)
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self.assertEqual(orig_device, torch.accelerator.current_device_index())
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s1 = torch.Stream(target_device)
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torch.accelerator.set_stream(s1)
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self.assertEqual(target_device, torch.accelerator.current_device_index())
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torch.accelerator.synchronize(orig_device)
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self.assertEqual(target_device, torch.accelerator.current_device_index())
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def test_generic_stream_behavior(self):
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s1 = torch.Stream()
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s2 = torch.Stream()
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torch.accelerator.set_stream(s1)
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self.assertEqual(torch.accelerator.current_stream(), s1)
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event = torch.Event()
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a = torch.randn(1000)
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b = torch.randn(1000)
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c = a + b
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torch.accelerator.set_stream(s2)
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self.assertEqual(torch.accelerator.current_stream(), s2)
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a_acc = a.to(torch.accelerator.current_accelerator(), non_blocking=True)
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b_acc = b.to(torch.accelerator.current_accelerator(), non_blocking=True)
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torch.accelerator.set_stream(s1)
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self.assertEqual(torch.accelerator.current_stream(), s1)
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event.record(s2)
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event.synchronize()
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c_acc = a_acc + b_acc
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event.record(s2)
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torch.accelerator.synchronize()
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self.assertTrue(event.query())
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self.assertEqual(c_acc.cpu(), c)
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def test_current_stream_query(self):
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s = torch.accelerator.current_stream()
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self.assertEqual(torch.accelerator.current_stream(s.device), s)
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self.assertEqual(torch.accelerator.current_stream(s.device.index), s)
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self.assertEqual(torch.accelerator.current_stream(str(s.device)), s)
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other_device = torch.device("cpu")
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with self.assertRaisesRegex(
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ValueError, "doesn't match the current accelerator"
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):
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torch.accelerator.current_stream(other_device)
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def test_stream_context_manager(self):
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prev_stream = torch.accelerator.current_stream()
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with torch.Stream() as s:
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self.assertEqual(torch.accelerator.current_stream(), s)
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self.assertEqual(torch.accelerator.current_stream(), prev_stream)
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@unittest.skipIf(not TEST_MULTIACCELERATOR, "only one accelerator detected")
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def test_multi_device_stream_context_manager(self):
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src_device = 0
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dst_device = 1
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torch.accelerator.set_device_index(src_device)
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src_prev_stream = torch.accelerator.current_stream()
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dst_prev_stream = torch.accelerator.current_stream(dst_device)
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with torch.Stream(dst_device) as dst_stream:
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self.assertEqual(torch.accelerator.current_device_index(), dst_device)
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self.assertEqual(torch.accelerator.current_stream(), dst_stream)
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self.assertEqual(
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torch.accelerator.current_stream(src_device), src_prev_stream
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)
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self.assertEqual(torch.accelerator.current_device_index(), src_device)
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self.assertEqual(torch.accelerator.current_stream(), src_prev_stream)
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self.assertEqual(torch.accelerator.current_stream(dst_device), dst_prev_stream)
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@unittest.skipIf(TEST_MPS, "MPS doesn't support pin memory!")
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def test_pin_memory_on_non_blocking_copy(self):
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t_acc = torch.randn(100).to(torch.accelerator.current_accelerator())
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t_host = t_acc.to("cpu", non_blocking=True)
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torch.accelerator.synchronize()
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self.assertTrue(t_host.is_pinned())
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self.assertEqual(t_acc.cpu(), t_host)
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if __name__ == "__main__":
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run_tests()
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