[XLA:GPU] Disable `xla_gpu_enable_pipelined_all_gather` by default.

openxla / xla

A machine learning compiler for GPUs, CPUs, and ML accelerators

Apache License 2.0

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Closed copybara-service[bot] closed 6 days ago

copybara-service[bot] commented 1 week ago

[XLA:GPU] Disable xla_gpu_enable_pipelined_all_gather by default.

This breaks the natural optimization barrier of a while loop.