[MPS] Make MPSProfiler usable from C++ #144560
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🔗 Helpful Links🧪 See artifacts and rendered test results at hud.pytorch.org/pr/144560
Note: Links to docs will display an error until the docs builds have been completed. ⏳ 33 Pending, 1 Unrelated FailureAs of commit 7b4b6fb with merge base a222029 ( UNSTABLE - The following job failed but was likely due to flakiness present on trunk and has been marked as unstable:
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This was referenced Jan 10, 2025
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I.e. when `MTL_CAPTURE_ENABLED` environment variable is set to 1, one should be able to invoke wrap the code with `torch.mps.profiler.capture_metal` to generate gputrace for shaders invoked inside the context manager.
For example, code below:
```python
import torch
import os
def foo(x):
return x[:,::2].sin() + x[:, 1::2].cos()
if __name__ == "__main__":
os.environ["MTL_CAPTURE_ENABLED"] = "1"
x = torch.rand(32, 1024, device="mps")
with torch.mps.profiler.metal_capture("compiled_shader"):
torch.compile(foo)(x)
```
should capture the execution of a `torch.compile` generated shader
<img width="734" alt="image" src="https://github.com/user-attachments/assets/718ff64e-103b-4b11-b66c-c89cfc770b5d" />
Pull Request resolved: #144561
Approved by: https://github.com/manuelcandales
ghstack dependencies: #144559, #144560
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Stack from ghstack (oldest at bottom):
MPSProfiler::start/stopCaptureto Python #144561By moving
buildTensorStringimplementation away from the header