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Print profiling manifold url

prints an (internal, vpn) only link for each profile trace file that's
saved to manifold. Just search for 'trace' in your job logs on mast,
and click one of the rank links.

e.g.

[trainer37|5]:[titan] 2025-08-07 14:21:01,227 - root - INFO - Finished
dumping profiler traces in 5.22 seconds:
https://interncache-all.fbcdn.net/manifold/perfetto-artifacts/tree/ui/index.html#!/?url=https://interncache-all.fbcdn.net/manifold/torchtrain_datasets/tree/outputs/torchtitan-64-whc-jv2j4mp/profile_trace/iteration_20/rank37_trace.json

prints an (internal, vpn) only link for each profile trace file that's
saved to manifold.  Just search for 'trace' in your job logs on mast,
and click one of the rank links.

e.g.

[trainer37|5]:[titan] 2025-08-07 14:21:01,227 - root - INFO - Finished
dumping profiler traces in 5.22 seconds:
https://interncache-all.fbcdn.net/manifold/perfetto-artifacts/tree/ui/index.html#!/?url=https://interncache-all.fbcdn.net/manifold/torchtrain_datasets/tree/outputs/torchtitan-64-whc-jv2j4mp/profile_trace/iteration_20/rank37_trace.json
@meta-cla meta-cla bot added the CLA Signed This label is managed by the Meta Open Source bot. label Oct 8, 2025
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