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[None][fix] Fix free memory fraction calculation in resource manager #6807

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[None][fix] Fix free memory fraction calculation in resource manager #6807

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9 changes: 8 additions & 1 deletion tensorrt_llm/_torch/pyexecutor/resource_manager.py
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Original file line number Diff line number Diff line change
Expand Up @@ -814,7 +814,14 @@ def calculate_max_num_blocks_from_cpp(
logger.debug(f"window_size_to_layers: {window_size_to_layers}")

free_mem, total_mem = torch.cuda.mem_get_info()
primary_pool_memory_bytes = free_mem
free_mem_fraction = (kv_cache_config.free_gpu_memory_fraction
if kv_cache_config.free_gpu_memory_fraction
is not None else 0.9)
assert free_mem_fraction < 1.0, (
f"Invalid freeMemFraction: {free_mem_fraction} must be < 1.0")
logger.debug(f"free_mem_fraction: {free_mem_fraction}")

primary_pool_memory_bytes = int(free_mem * free_mem_fraction)
secondary_pool_memory_bytes = 0
logger.debug(
f"primary_pool_memory_bytes is set to {primary_pool_memory_bytes/1024**3}GB, \n"
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