March 2026 (2026-03) — AI-Hypercomputer/maxtext: Delivered a TPU-Specific Power Profiling Toggle to enhance observability for TPU deployments while preserving GPU tracing. Implemented a profile_power_events flag to gate TPU power profiling events within advanced_configuration. Default behavior remains GPU-trace-safe; TPU users can opt in with profile_power_events=True. This change fixes an INVALID_ARGUMENT issue that aborted GPU xplane traces when TPU-specific keys were present, ensuring reliable traces across TPU/GPU workloads. Impact: improved cross-architecture profiling, stronger performance/thermal visibility, and safer rollout with backward compatibility. Technologies involved: tracing tooling integration, feature-flag configuration, CUPTI API considerations; commits include ea55a0d64742a0a44abdcee68b0a5aac04b732b5.

January 2025 – NVIDIA/JAX-Toolbox: Delivered targeted GPU performance guidance for Blackwell (B200) systems, focusing on optimizations for LLM training and clearer guidance to users. Completed a documentation update with hardware-specific tips (attention mask types, CUDA device connections, XLA flags, memory utilization), improving performance outcomes and time-to-value.