gsutil retry#7
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- Benchmark history: add row AI-Hypercomputer#7 (scan=true, 71.1 ms / 450 tok/s, +28% vs AI-Hypercomputer#6) - Add 'scan_layers=true Analysis' section explaining the 15.4 ms overhead: root cause is loss of XLA inter-layer weight-prefetch pipelining (lax.while_loop prevents cross-iteration scheduling); ~0.32 ms/layer consistent with memory-bandwidth-bound workload losing prefetch overlap - Quantify sparse dispatch break-even bar: must recover >22% to beat 55.7 ms dense baseline; rough estimate ~34 ms achievable with ragged_all_to_all - Update 'Most Impactful Next Fixes' section: scan fix done, ragged_all_to_all is now AI-Hypercomputer#1 priority; update HEAD ref to 539cc04 - Re-rank optimisation table: ragged_all_to_all moved to rank 2 (highest unrun), scan_layers=true added as rank 3 (done, prerequisite)
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Add a retry to gsutil.
We have found that gsutil does not always install in time, but a short retry fixes this issue. We have only seen this issue in large runs (e.g. 2xv4-384), previously the code was working up to 2xv4-128.