[Mosaic][Easy] - Wire up kernel names to MLIR dump

PiperOrigin-RevId: 699408419

jax/_src/tpu_custom_call.py

@@ -278,6 +278,7 @@ def _lower_tpu_kernel(
     module: ir.Module,
     hardware_generation: int,
     target_shape: tuple[int, int],
+    kernel_name: str | None = None,
 ) -> ir.Module:
   """Runs MLIR passes lowering the given module to an MLIR module.
 
@@ -303,8 +304,7 @@ def _lower_tpu_kernel(
     tpu.register_dialect(ctx)
     mhlo.register_mhlo_dialect(ctx)
     mhlo.register_mhlo_passes()
-
-    dump_mlir(module, "original")
+    dump_mlir(module, "original", kernel_name)
 
     if _MOSAIC_ALLOW_HLO.value:
       # Run hlo dialect conversion: hlo -> linalg -> vector.
@@ -406,6 +406,7 @@ def _lower_mosaic_module_to_asm(
     *,
     backend: str,
     device_type: str | None,
+    kernel_name: str | None,
 ) -> tuple[ir.Module, tuple[bool, bool, bool, bool]]:
   has_communication, has_custom_barrier = tpu.private_has_communication(
       module.operation
@@ -429,7 +430,7 @@ def _lower_mosaic_module_to_asm(
       hardware_generation = int(device_kind[len("TPU v")])
       target_shape = get_target_shape(hardware_generation)
       module = _lower_tpu_kernel(
-          module, hardware_generation, target_shape=target_shape
+          module, hardware_generation, target_shape=target_shape, kernel_name=kernel_name,
       )
       needs_hlo_passes = False
       needs_layout_passes = False
@@ -504,6 +505,7 @@ def _lower_to_custom_call_config(
     collective_id: int | None,
     serialization_format: int | None,
     output_memory_spaces: tuple[MemorySpace | None, ...] | None = None,
+    kernel_name: str | None = None,
 ) -> CustomCallBackendConfig:
   lowered_module_asm, (
       has_communication,
@@ -514,6 +516,7 @@ def _lower_to_custom_call_config(
       module,
       backend=backend,
       device_type=device_type,
+      kernel_name=kernel_name,
   )
   return _lowered_to_custom_call_config(
       lowered_module_asm,
@@ -613,6 +616,7 @@ def lower_module_to_custom_call(
       device_type=device_type,
       serialization_format=serialization_format,
       output_memory_spaces=output_memory_spaces,
+      kernel_name=kernel_name,
   )
   return _tpu_custom_call_lowering(
       ctx,
@@ -654,6 +658,7 @@ def as_tpu_kernel(
       collective_id=collective_id,
       serialization_format=serialization_format,
       output_memory_spaces=output_memory_spaces,
+      kernel_name=kernel_name,
   )
   return _as_jax_callable(
       config,
@@ -735,7 +740,7 @@ def apply_kernel(*args):
   return jax.jit(apply_kernel)
 
 
-def dump_mlir(module: ir.Module, name: str):
+def dump_mlir(module: ir.Module, name: str, kernel_name: str | None = None):
   """A helper function to dump mosaic mlir module"""
   try:
     should_dump = FLAGS["xla_mosaic_dump_to"].value
@@ -744,6 +749,8 @@ def dump_mlir(module: ir.Module, name: str):
   if should_dump == "sponge":
     outdir = os.environ.get("TEST_UNDECLARED_OUTPUTS_DIR", None)
     if outdir:
+      if kernel_name:
+        name = f"{kernel_name}-{name}"
       path = os.path.join(outdir, f"{time.time_ns()}-mosaic-dump-{name}-py.txt")
       with open(path, "w") as f:
         f.write(str(module))