Fix multi-host profiling and resolve profiler tracer collisions - #455
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copybara-service[bot] merged 1 commit intoAug 12, 2026
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richaguptaa17
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Jul 31, 2026
richaguptaa17
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- Enable ML Diagnostics profiler on secondary TPU worker processes by removing the jax.process_index() == 0 lock from _ml_diagnostics_profiler_enabled().
- Refactor Profiler class in max_utils.py with active state tracking (_active). When both enable_ml_diagnostics and enable_profiler are True, prioritize ML Diagnostics and skip the standalone JAX profiler with a log warning to avoid RuntimeError tracer collisions.
- Enable ML Diagnostics profiler on secondary TPU worker processes by removing the jax.process_index() == 0 lock from _ml_diagnostics_profiler_enabled(). - Refactor Profiler class in max_utils.py with active state tracking (_active). When both enable_ml_diagnostics and enable_profiler are True, prioritize ML Diagnostics and skip the standalone JAX profiler with a log warning to avoid RuntimeError tracer collisions.
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mbohlool
approved these changes
Aug 5, 2026
entrpn
approved these changes
Aug 6, 2026
| trace_dir = self.config.tensorboard_dir | ||
| if trace_dir.startswith("gs://"): | ||
| local_dir = os.path.join("/tmp/profiler_traces", self.config.run_name) | ||
| if os.path.exists(local_dir): |
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In a multi-host setup, won't non-master hosts upload their trace files to the same GCS prefix and overwrite each other?
copybara-service
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merged commit Aug 12, 2026
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