[Benchmark] Support kernel variants; setup matmul tritonbench integration

stack-info: PR: #380, branch: yf225/stack/42

Author: yf225

benchmarks/run.py

@@ -26,7 +26,8 @@
 from typing import Callable
 
 # Maps tritonbench op names to Helion kernel examples
-KERNEL_MAPPINGS: dict[str, tuple[str, str, str]] = {
+# Can map to a single kernel or a list of kernel variants
+KERNEL_MAPPINGS: dict[str, tuple[str, str, str] | list[tuple[str, str, str]]] = {
     # <tritonbench_op_name>: (<tritonbench_module_path>, <helion_kernel_module_path>, <helion_kernel_function_name>)
     "vector_add": ("tritonbench.operators.vector_add.operator", "examples.add", "add"),
     "embedding": (
@@ -80,6 +81,14 @@
         "examples.layer_norm",
         "layer_norm_fwd",
     ),
+    # Multiple kernel variants:
+    "gemm": (
+        "tritonbench.operators.gemm.operator",
+        [
+            ("examples.matmul", "matmul"),
+            ("examples.matmul_split_k", "matmul_split_k"),
+        ],
+    ),
 }
 
 
@@ -210,7 +219,7 @@ def run_kernel(
     tritonbench_args: list[str],
     input_shard_info: tuple[int, int] | None = None,
 ) -> None:
-    """Run a single kernel benchmark."""
+    """Run a kernel benchmark, handling both single and multiple variants."""
     # Check if kernel is in the mapping table
     if kernel_name not in KERNEL_MAPPINGS:
         print(f"Error: Unknown kernel '{kernel_name}'", file=sys.stderr)
@@ -219,25 +228,32 @@ def run_kernel(
         )
         sys.exit(1)
 
-    tritonbench_module, module_path, func_name = KERNEL_MAPPINGS[kernel_name]
+    mapping = KERNEL_MAPPINGS[kernel_name]
 
-    # Import from the mapped module
-    try:
-        module = importlib.import_module(module_path)
-        if not hasattr(module, func_name):
-            print(
-                f"Error: Module '{module_path}' does not have a function named '{func_name}'",
-                file=sys.stderr,
-            )
-            sys.exit(1)
-        kernel_func = getattr(module, func_name)
-    except ImportError as e:
-        print(
-            f"Error: Could not import {func_name} from {module_path}", file=sys.stderr
-        )
-        print(f"Import error: {e}", file=sys.stderr)
-        sys.exit(1)
-        return
+    # Normalize to list of variants format
+    if len(mapping) == 2 and isinstance(mapping[1], list):
+        # Multiple variants with shared tritonbench module
+        tritonbench_module = mapping[0]
+        variants = mapping[1]
+    else:
+        # Single kernel with full mapping - convert to list format
+        tritonbench_module, module_path, func_name = mapping
+        variants = [(module_path, func_name)]
+
+    # Run all variants in the same benchmark
+    run_kernel_variants(
+        kernel_name, tritonbench_module, variants, tritonbench_args, input_shard_info
+    )
+
+
+def run_kernel_variants(
+    kernel_name: str,
+    tritonbench_module: str,
+    variants: list[tuple[str, str]],
+    tritonbench_args: list[str],
+    input_shard_info: tuple[int, int] | None = None,
+) -> None:
+    """Run kernel variants in the same benchmark run."""
 
     # Import tritonbench components
     try:
@@ -260,19 +276,26 @@ def run_kernel(
     assert "--op" not in tritonbench_args
     tritonbench_args = ["--op", operator_name, *tritonbench_args]
 
-    # Get module's TRITONBENCH_ARGS if any
-    module_args = getattr(module, "TRITONBENCH_ARGS", {})
+    # Collect all module args from all variants
+    all_module_args = {}
+    for module_path, func_name in variants:
+        try:
+            module = importlib.import_module(module_path)
+            module_args = getattr(module, "TRITONBENCH_ARGS", {})
+            all_module_args.update(module_args)
+        except ImportError:
+            pass
 
     # Add module args to tritonbench_args if not already present
-    for arg_name, arg_value in module_args.items():
+    for arg_name, arg_value in all_module_args.items():
         arg_flag = f"--{arg_name.replace('_', '-')}"
         if arg_flag not in tritonbench_args:
             tritonbench_args.extend([arg_flag, str(arg_value)])
 
     # Parse known args and collect unknown ones for operator
     tb_args, unknown_args = tb_parser.parse_known_args(tritonbench_args)
 
-    # Import and run the operator
+    # Import and get the operator class
     try:
         operator_module = importlib.import_module(tritonbench_module)
         Operator = operator_module.Operator
@@ -285,64 +308,94 @@ def run_kernel(
         print(f"Import error: {e}", file=sys.stderr)
         sys.exit(1)
 
-    # Create the benchmark method
-    def helion_method(
-        self: object,
-        *args: object,
-    ) -> Callable[..., object]:
-        """Helion implementation."""
-
-        # Reset all Helion kernels before creating the benchmark function
-        # so that each input size can go through its own autotuning.
-        from helion.runtime.kernel import Kernel
-
-        for attr_name in dir(module):
-            attr = getattr(module, attr_name)
-            if isinstance(attr, Kernel):
-                attr.reset()
-
-        def _inner() -> Callable[..., Any] | object:
-            # Force autotuning unless HELION_USE_DEFAULT_CONFIG=1 is set
-            # This ensures we run autotuning even if the kernel has pre-specified configs
-            if os.environ.get("HELION_USE_DEFAULT_CONFIG", "0") != "1":
-                # Find all Kernel objects in the module and force autotuning
-                for attr_name in dir(module):
-                    attr = getattr(module, attr_name)
-                    if isinstance(attr, Kernel):
-                        attr.settings.force_autotune = True
-
-            result = kernel_func(*args)
-            if callable(result):
-                return result()
-            return result
-
-        return _inner
-
-    # Method name for the benchmark
-    helion_method_name = f"helion_{kernel_name}"
-
     # Import register_benchmark API
     from tritonbench.utils.triton_op import (  # pyright: ignore[reportMissingImports]
         register_benchmark,
     )
 
-    # Use register_benchmark decorator
-    decorated_method = register_benchmark(
-        operator_name=operator_name,
-        func_name=helion_method_name,
-        baseline=False,
-        enabled=True,
-        fwd_only=False,
-        label=helion_method_name,
-    )(helion_method)
-
-    # Set the decorated method on the Operator class
-    setattr(Operator, helion_method_name, decorated_method)
-
-    print(
-        f"Running {operator_name} benchmark with Helion implementation...\n",
-        file=sys.stderr,
-    )
+    # Register all variants as separate methods
+    for module_path, func_name in variants:
+        # Import the kernel function
+        try:
+            module = importlib.import_module(module_path)
+            if not hasattr(module, func_name):
+                print(
+                    f"Error: Module '{module_path}' does not have a function named '{func_name}'",
+                    file=sys.stderr,
+                )
+                continue
+            kernel_func = getattr(module, func_name)
+        except ImportError as e:
+            print(
+                f"Error: Could not import {func_name} from {module_path}",
+                file=sys.stderr,
+            )
+            print(f"Import error: {e}", file=sys.stderr)
+            continue
+
+        # Create the benchmark method closure to capture the correct module and function
+        def create_helion_method(mod, kfunc):
+            def helion_method(
+                self: object,
+                *args: object,
+            ) -> Callable[..., object]:
+                """Helion implementation."""
+
+                # Reset all Helion kernels before creating the benchmark function
+                # so that each input size can go through its own autotuning.
+                from helion.runtime.kernel import Kernel
+
+                for attr_name in dir(mod):
+                    attr = getattr(mod, attr_name)
+                    if isinstance(attr, Kernel):
+                        attr.reset()
+
+                def _inner() -> Callable[..., Any] | object:
+                    # Force autotuning unless HELION_USE_DEFAULT_CONFIG=1 is set
+                    # This ensures we run autotuning even if the kernel has pre-specified configs
+                    if os.environ.get("HELION_USE_DEFAULT_CONFIG", "0") != "1":
+                        # Find all Kernel objects in the module and force autotuning
+                        for attr_name in dir(mod):
+                            attr = getattr(mod, attr_name)
+                            if isinstance(attr, Kernel):
+                                attr.settings.force_autotune = True
+
+                    result = kfunc(*args)
+                    if callable(result):
+                        return result()
+                    return result
+
+                return _inner
+
+            return helion_method
+
+        # Method name for the benchmark
+        variant_name = func_name
+        helion_method_name = f"helion_{variant_name}"
+
+        # Use register_benchmark decorator
+        decorated_method = register_benchmark(
+            operator_name=operator_name,
+            func_name=helion_method_name,
+            baseline=False,
+            enabled=True,
+            fwd_only=False,
+            label=helion_method_name,
+        )(create_helion_method(module, kernel_func))
+
+        # Set the decorated method on the Operator class
+        setattr(Operator, helion_method_name, decorated_method)
+
+    if len(variants) == 1:
+        print(
+            f"Running {operator_name} benchmark with Helion implementation...\n",
+            file=sys.stderr,
+        )
+    else:
+        print(
+            f"Running {operator_name} benchmark with {len(variants)} Helion implementations...\n",
+            file=sys.stderr,
+        )
 
     # Create and run the operator with unknown args
     op = Operator(tb_args=tb_args, extra_args=unknown_args)