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[Bugfix][TPU] Set readonly=True for non-root devices #6980

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Jul 31, 2024
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[Bugfix][TPU] Set readonly=True for non-root devices #6980

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5 changes: 4 additions & 1 deletion vllm/worker/tpu_worker.py
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Original file line number Diff line number Diff line change
Expand Up @@ -104,7 +104,10 @@ def init_device(self) -> None:
# Use persistent cache to avoid XLA recompilation.
# NOTE(woosuk): This does not completely eliminate the recompilation
# overhead because dynamo does not cache the compiled results.
xr.initialize_cache(envs.VLLM_XLA_CACHE_PATH, readonly=False)
# NOTE(woosuk): Set readonly=False only for the rank 0 process to avoid
# race conditions.
xr.initialize_cache(envs.VLLM_XLA_CACHE_PATH,
readonly=not self.is_driver_worker)

def load_model(self):
self.model_runner.load_model()
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