Introduce a generic API torch._C._accelerator_setAllocatorSettings (#165291)

Pull Request resolved: https://github.com/pytorch/pytorch/pull/165291
Approved by: https://github.com/albanD
ghstack dependencies: #165288, #165289

torch/_C/__init__.pyi.in

@@ -2048,7 +2048,6 @@ def _cuda_cudaHostAllocator() -> _int: ...
 def _cuda_cudaCachingAllocator_raw_alloc(size: _int, cuda_stream: _int) -> _int: ...
 def _cuda_cudaCachingAllocator_raw_delete(ptr: _int) -> None: ...
 def _cuda_cudaCachingAllocator_enable(val: _bool) -> None: ...
-def _cuda_cudaCachingAllocator_set_allocator_settings(env: str) -> None: ...
 def _cuda_beginAllocateToPool(device: _int, mempool_id: tuple[_int, _int]) -> None: ...
 def _cuda_beginAllocateCurrentThreadToPool(
     device: _int,
@@ -2477,6 +2476,7 @@ def _accelerator_emptyCache() -> None: ...
 def _accelerator_getDeviceStats(device_index: _int) -> dict[str, Any]: ...
 def _accelerator_resetAccumulatedStats(device_index: _int) -> None: ...
 def _accelerator_resetPeakStats(device_index: _int) -> None: ...
+def _accelerator_setAllocatorSettings(env: str) -> None: ...
 
 # Defined in torch/csrc/jit/python/python_tracer.cpp
 class TracingState:

torch/_dynamo/trace_rules.py

@@ -449,6 +449,7 @@ torch_c_binding_in_graph_functions = dict.fromkeys(
         "torch._C._accelerator_getAccelerator",
         "torch._C._accelerator_getDeviceIndex",
         "torch._C._accelerator_getStream",
+        "torch._C._accelerator_setAllocatorSettings",
         "torch._C._accelerator_setStream",
         "torch._C._accelerator_synchronizeDevice",
         "torch._C._activate_gpu_trace",
@@ -505,7 +506,6 @@ torch_c_binding_in_graph_functions = dict.fromkeys(
         "torch._C._cuda_clearCublasWorkspaces",
         "torch._C._cuda_cudaCachingAllocator_raw_alloc",
         "torch._C._cuda_cudaCachingAllocator_raw_delete",
-        "torch._C._cuda_cudaCachingAllocator_set_allocator_settings",
         "torch._C._cuda_cudaHostAllocator",
         "torch._C._cuda_customAllocator",
         "torch._C._cuda_emptyCache",

torch/csrc/DeviceAccelerator.cpp

@@ -1,3 +1,4 @@
+#include <c10/core/AllocatorConfig.h>
 #include <torch/csrc/DeviceAccelerator.h>
 #include <torch/csrc/utils/device_lazy_init.h>
 
@@ -136,6 +137,10 @@ void initModule(PyObject* module) {
   m.def("_accelerator_resetPeakStats", [](c10::DeviceIndex device_index) {
     at::accelerator::resetPeakStats(device_index);
   });
+
+  m.def("_accelerator_setAllocatorSettings", [](std::string env) {
+    c10::CachingAllocator::setAllocatorSettings(env);
+  });
 }
 
 } // namespace torch::accelerator

torch/csrc/cuda/Module.cpp

@@ -20,8 +20,8 @@
 #include <ATen/cuda/detail/CUDAHooks.h>
 #include <ATen/cuda/jiterator.h>
 #include <ATen/cuda/tunable/Tunable.h>
+#include <c10/core/AllocatorConfig.h>
 #include <c10/core/StorageImpl.h>
-#include <c10/cuda/CUDAAllocatorConfig.h>
 #include <c10/cuda/CUDACachingAllocator.h>
 #include <c10/cuda/CUDAFunctions.h>
 #include <ATen/cuda/CUDAGraphsUtils.cuh>
@@ -422,16 +422,6 @@ PyObject* THCPModule_cudaCachingAllocator_enable(
   END_HANDLE_TH_ERRORS
 }
 
-PyObject* THCPModule_cudaCachingAllocator_set_allocator_settings(
-    PyObject* _unused,
-    PyObject* env) {
-  HANDLE_TH_ERRORS
-  c10::cuda::CUDACachingAllocator::setAllocatorSettings(
-      THPUtils_unpackString(env));
-  Py_RETURN_NONE;
-  END_HANDLE_TH_ERRORS
-}
-
 PyObject* THCPModule_getAllocatorBackend(PyObject* _unused, PyObject* noargs) {
   HANDLE_TH_ERRORS
   return THPUtils_packString(c10::cuda::CUDACachingAllocator::name());
@@ -2077,10 +2067,6 @@ static struct PyMethodDef _THCPModule_methods[] = {
      THCPModule_cudaCachingAllocator_enable,
      METH_O,
      nullptr},
-    {"_cuda_cudaCachingAllocator_set_allocator_settings",
-     THCPModule_cudaCachingAllocator_set_allocator_settings,
-     METH_O,
-     nullptr},
     {"_cuda_getAllocatorBackend",
      THCPModule_getAllocatorBackend,
      METH_NOARGS,

torch/cuda/memory.py

@@ -1101,8 +1101,12 @@ def _save_memory_usage(filename="output.svg", snapshot=None):
         f.write(_memory(snapshot))
 
 
+@deprecated(
+    "torch.cuda._set_allocator_settings is deprecated. Use torch._C._accelerator_setAllocatorSettings instead.",
+    category=FutureWarning,
+)
 def _set_allocator_settings(env: str):
-    return torch._C._cuda_cudaCachingAllocator_set_allocator_settings(env)
+    return torch._C._accelerator_setAllocatorSettings(env)
 
 
 def get_allocator_backend() -> str: