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Add VLLM_ENABLE_INDUCTOR_MAX_AUTOTUNE & VLLM_ENABLE_INDUCTOR_COORDINA… #25493

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Merged
merged 2 commits into from
Sep 23, 2025
Merged

Add VLLM_ENABLE_INDUCTOR_MAX_AUTOTUNE & VLLM_ENABLE_INDUCTOR_COORDINA… #25493

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Add VLLM_ENABLE_INDUCTOR_MAX_AUTOTUNE & VLLM_ENABLE_INDUCTOR_COORDINA…
rouchenzi Sep 23, 2025
5f801ee
Merge branch 'main' into autotune_env_test
rouchenzi Sep 23, 2025
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5 changes: 3 additions & 2 deletions vllm/compilation/compiler_interface.py
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Original file line number Diff line number Diff line change
Expand Up @@ -551,8 +551,9 @@ def set_inductor_config(config, runtime_shape):
if isinstance(runtime_shape, int):
# for a specific batchsize, tuning triton kernel parameters
# can be beneficial
config["max_autotune"] = True
config["coordinate_descent_tuning"] = True
config["max_autotune"] = envs.VLLM_ENABLE_INDUCTOR_MAX_AUTOTUNE
config["coordinate_descent_tuning"] = (
envs.VLLM_ENABLE_INDUCTOR_COORDINATE_DESCENT_TUNING)


class EagerAdaptor(CompilerInterface):
Expand Down
15 changes: 15 additions & 0 deletions vllm/envs.py
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Original file line number Diff line number Diff line change
Expand Up @@ -193,6 +193,8 @@
VLLM_DBO_COMM_SMS: int = 20
GPT_OSS_SYSTEM_TOOL_MCP_LABELS: list[str] = []
VLLM_PATTERN_MATCH_DEBUG: Optional[str] = None
VLLM_ENABLE_INDUCTOR_MAX_AUTOTUNE: bool = True
VLLM_ENABLE_INDUCTOR_COORDINATE_DESCENT_TUNING: bool = True
VLLM_USE_NCCL_SYMM_MEM: bool = False
VLLM_NCCL_INCLUDE_PATH: Optional[str] = None

Expand Down Expand Up @@ -1413,6 +1415,17 @@ def get_vllm_port() -> Optional[int]:
"code_interpreter",
"web_search_preview"]),

# Enable max_autotune & coordinate_descent_tuning in inductor_config
# to compile static shapes passed from compile_sizes in compilation_config
# If set to 1, enable max_autotune; By default, this is enabled (1)
"VLLM_ENABLE_INDUCTOR_MAX_AUTOTUNE":
lambda: bool(int(os.getenv("VLLM_ENABLE_INDUCTOR_MAX_AUTOTUNE", "1"))),
# If set to 1, enable coordinate_descent_tuning;
# By default, this is enabled (1)
"VLLM_ENABLE_INDUCTOR_COORDINATE_DESCENT_TUNING":
lambda: bool(int(os.getenv("VLLM_ENABLE_INDUCTOR_COORDINATE_DESCENT_TUNING",
"1"))),
Comment on lines +1421 to +1427
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high

The current implementation bool(int(os.getenv(...))) for parsing these boolean environment variables is not robust. It will raise a ValueError if a user sets the variable to a non-integer string like "true" or "false". To improve user experience and prevent runtime crashes from misconfiguration, it's better to adopt a more resilient parsing pattern that is also used elsewhere in this file.

Suggested change
"VLLM_ENABLE_INDUCTOR_MAX_AUTOTUNE":
lambda: bool(int(os.getenv("VLLM_ENABLE_INDUCTOR_MAX_AUTOTUNE", "1"))),
# If set to 1, enable coordinate_descent_tuning;
# By default, this is enabled (1)
"VLLM_ENABLE_INDUCTOR_COORDINATE_DESCENT_TUNING":
lambda: bool(int(os.getenv("VLLM_ENABLE_INDUCTOR_COORDINATE_DESCENT_TUNING",
"1"))),
"VLLM_ENABLE_INDUCTOR_MAX_AUTOTUNE":
lambda: os.getenv("VLLM_ENABLE_INDUCTOR_MAX_AUTOTUNE", "1").lower() in ("1", "true"),
# If set to 1, enable coordinate_descent_tuning;
# By default, this is enabled (1)
"VLLM_ENABLE_INDUCTOR_COORDINATE_DESCENT_TUNING":
lambda: (os.getenv("VLLM_ENABLE_INDUCTOR_COORDINATE_DESCENT_TUNING",
"1").lower() in ("1", "true")),


# Flag to enable NCCL symmetric memory allocation and registration
"VLLM_USE_NCCL_SYMM_MEM":
lambda: bool(int(os.getenv("VLLM_USE_NCCL_SYMM_MEM", "0"))),
Expand Down Expand Up @@ -1513,6 +1526,8 @@ def compute_hash() -> str:
"VLLM_ROCM_QUICK_REDUCE_CAST_BF16_TO_FP16",
"VLLM_ROCM_QUICK_REDUCE_MAX_SIZE_BYTES_MB",
"VLLM_ROCM_FP8_MFMA_PAGE_ATTN",
"VLLM_ENABLE_INDUCTOR_MAX_AUTOTUNE",
"VLLM_ENABLE_INDUCTOR_COORDINATE_DESCENT_TUNING",
]
for key in environment_variables_to_hash:
# if this goes out of sync with environment_variables,
Expand Down