Revert "Adds support for accelerated sorting with x86-simd-sort (pytorch#127936)"

This reverts commit 239a9ad.

Reverted pytorch#127936 on behalf of https://github.com/atalman due to test/test_sort_and_select.py::TestSortAndSelectCPU::test_sort_discontiguous_slow_cpu_float32 [GH job link](https://github.com/pytorch/pytorch/actions/runs/10994904767/job/30525578456) [HUD commit link](https://hud.pytorch.org/pytorch/pytorch/commit/239a9ad65eebf93dcf9bb108a5129d4160b12c86) ([comment](pytorch#127936 (comment)))

Author: pytorchmergebot

.gitmodules

@@ -127,6 +127,3 @@
 [submodule "third_party/NVTX"]
 	path = third_party/NVTX
 	url = https://github.com/NVIDIA/NVTX.git
-[submodule "third_party/x86-simd-sort"]
-	path = third_party/x86-simd-sort
-	url = https://github.com/intel/x86-simd-sort.git

CMakeLists.txt

@@ -262,7 +262,6 @@ else()
   cmake_dependent_option(USE_CUFILE "Use cuFile" OFF "USE_CUDA AND NOT WIN32" OFF)
 endif()
 option(USE_FBGEMM "Use FBGEMM (quantized 8-bit server operators)" ON)
-option(USE_X86_SIMD_SORT "Use x86-simd-sort to accelerate sorting and topk for AVX2/AVX512" ON)
 option(USE_KINETO "Use Kineto profiling library" ON)
 option(USE_CUPTI_SO "Use CUPTI as a shared library" ON)
 option(USE_FAKELOWP "Use FakeLowp operators" OFF)
@@ -908,13 +907,6 @@ if(USE_FBGEMM)
   string(APPEND CMAKE_CXX_FLAGS " -DUSE_FBGEMM")
 endif()
 
-if(USE_X86_SIMD_SORT)
-  string(APPEND CMAKE_CXX_FLAGS " -DUSE_X86_SIMD_SORT")
-  if(USE_XSS_OPENMP)
-    string(APPEND CMAKE_CXX_FLAGS " -DXSS_USE_OPENMP")
-  endif()
-endif()
-
 if(USE_PYTORCH_QNNPACK)
   string(APPEND CMAKE_CXX_FLAGS " -DUSE_PYTORCH_QNNPACK")
 endif()

NOTICE

@@ -454,37 +454,3 @@ and reference the following license:
     LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
     OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
     PERFORMANCE OF THIS SOFTWARE.
-
-=======================================================================
-x86-simd-sort BSD 3-Clause License
-=======================================================================
-
-Code derived from implementations in x86-simd-sort should mention its
-derivation and reference the following license:
-
-   Copyright (c) 2022, Intel. All rights reserved.
-
-   Redistribution and use in source and binary forms, with or without
-   modification, are permitted provided that the following conditions are met:
-
-   1. Redistributions of source code must retain the above copyright notice, this
-      list of conditions and the following disclaimer.
-
-   2. Redistributions in binary form must reproduce the above copyright notice,
-      this list of conditions and the following disclaimer in the documentation
-      and/or other materials provided with the distribution.
-
-   3. Neither the name of the copyright holder nor the names of its
-      contributors may be used to endorse or promote products derived from
-      this software without specific prior written permission.
-
-   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
-   AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-   DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
-   FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-   DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
-   SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
-   CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
-   OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

aten/src/ATen/native/cpu/SortingKernel.cpp

@@ -15,18 +15,11 @@
 #include <ATen/native/CompositeRandomAccessor.h>
 #include <ATen/native/TopKImpl.h>
 #include <c10/core/WrapDimMinimal.h>
-#include <c10/util/SmallBuffer.h>
 #include <c10/util/irange.h>
-
 #ifdef USE_FBGEMM
 #include <fbgemm/Utils.h>
 #endif
 
-#if USE_X86_SIMD_SORT && (defined(CPU_CAPABILITY_AVX512) || defined(CPU_CAPABILITY_AVX2))
-#define XSS_COMPILE_TIME_SUPPORTED
-#include <src/x86simdsort-static-incl.h>
-#endif
-
 namespace at::native {
 
 namespace {
@@ -126,7 +119,6 @@ static void parallel_sort1d_kernel(
     std::vector<int64_t> tmp_vals(elements);
     const scalar_t* sorted_keys = nullptr;
     const int64_t* sorted_vals = nullptr;
-
     std::tie(sorted_keys, sorted_vals) = fbgemm::radix_sort_parallel(
         keys,
         vals,
@@ -175,116 +167,6 @@ static inline void sort_kernel_impl(const value_accessor_t& value_accessor,
   }
 }
 
-#if defined(XSS_COMPILE_TIME_SUPPORTED)
-
-#define AT_DISPATCH_CASE_XSS_TYPES(...)          \
-  AT_DISPATCH_CASE(at::ScalarType::Long, __VA_ARGS__) \
-  AT_DISPATCH_CASE(at::ScalarType::Int, __VA_ARGS__) \
-  AT_DISPATCH_CASE(at::ScalarType::Double, __VA_ARGS__) \
-  AT_DISPATCH_CASE(at::ScalarType::Float, __VA_ARGS__)
-
-#define AT_DISPATCH_XSS_TYPES(TYPE, NAME, ...) \
-  AT_DISPATCH_SWITCH(TYPE, NAME, AT_DISPATCH_CASE_XSS_TYPES(__VA_ARGS__))
-
-static bool can_use_xss_sort(const TensorBase& values, const TensorBase& indices, int64_t dim, const bool stable) {
-  // xss_sort is not a stable sort
-  if (stable) return false;
-
-  auto type = values.scalar_type();
-  if (! (type == ScalarType::Long || type == ScalarType::Int || type == ScalarType::Double || type == ScalarType::Float)) return false;
-
-  return true;
-}
-
-static bool xss_sort_preferred(const TensorBase& values, const bool descending) {
-#if defined(XSS_USE_OPENMP) || !defined(USE_FBGEMM)
-    return true;
-#else
-    // Without OpenMP support for x86-simd-sort, fbgemm radix sort is faster when it can be used
-    return !can_use_radix_sort(values, descending);
-#endif
-}
-
-static void xss_sort_kernel(
-    const TensorBase& values,
-    const TensorBase& indices,
-    int64_t dim,
-    bool descending) {
-  auto iter = TensorIteratorConfig()
-    .check_all_same_dtype(false)
-    .resize_outputs(false)
-    .declare_static_shape(values.sizes(), /*squash_dims=*/dim)
-    .add_output(values)
-    .add_output(indices)
-    .build();
-
-  using index_t = int64_t;
-
-  AT_DISPATCH_XSS_TYPES(values.scalar_type(), "xss_sort_kernel", [&] {
-
-    auto values_dim_stride = values.stride(dim);
-    auto indices_dim_stride = indices.stride(dim);
-    auto dim_size = values.size(dim);
-
-    auto loop = [&](char** data, const int64_t* strides, int64_t n) {
-      auto* values_data_bytes = data[0];
-      auto* indices_data_bytes = data[1];
-
-      if(values_data_bytes==nullptr || indices_data_bytes==nullptr){
-        return;
-      }
-
-      if (values_dim_stride == 1 && indices_dim_stride == 1){
-        for (const auto i C10_UNUSED : c10::irange(n)) {
-          x86simdsortStatic::keyvalue_qsort<scalar_t, index_t>(
-              reinterpret_cast<scalar_t*>(values_data_bytes),
-              reinterpret_cast<index_t*>(indices_data_bytes),
-              dim_size,
-              true,
-              descending);
-
-          values_data_bytes += strides[0];
-          indices_data_bytes += strides[1];
-        }
-      }else{
-        c10::SmallBuffer<scalar_t, 0> tmp_values(dim_size);
-        c10::SmallBuffer<index_t, 0> tmp_indices(dim_size);
-
-        for (const auto i : c10::irange(n)) {
-          TensorAccessor<scalar_t, 1> mode_values_acc(
-              reinterpret_cast<scalar_t*>(data[0] + i * strides[0]),
-              &dim_size, &values_dim_stride);
-          TensorAccessor<index_t, 1> mode_indices_acc(
-              reinterpret_cast<index_t*>(data[1] + i * strides[1]),
-              &dim_size, &indices_dim_stride);
-
-          for (const auto j : c10::irange(dim_size)) {
-            tmp_values[j] = mode_values_acc[j];
-            tmp_indices[j] = j;
-          }
-
-          x86simdsortStatic::keyvalue_qsort<scalar_t, index_t>(
-              tmp_values.data(),
-              tmp_indices.data(),
-              dim_size,
-              true,
-              descending);
-
-          for (const auto j : c10::irange(dim_size)) {
-            mode_values_acc[j] = tmp_values[j];
-            mode_indices_acc[j] = tmp_indices[j];
-          }
-        }
-      }
-    };
-
-    int64_t grain_size = internal::GRAIN_SIZE / std::max(int64_t{1}, dim_size);
-    iter.for_each(loop, /*grain_size=*/grain_size);
-
-  });
-}
-#endif
-
 static void sort_kernel(
     const TensorBase& self,
     const TensorBase& values,
@@ -299,14 +181,6 @@ static void sort_kernel(
     // https://github.com/pytorch/pytorch/issues/91420
     return;
   }
-
-#if defined(XSS_COMPILE_TIME_SUPPORTED)
-  if (can_use_xss_sort(values, indices, dim, stable) && xss_sort_preferred(values, descending)){
-    xss_sort_kernel(values, indices, dim, descending);
-    return;
-  }
-#endif
-
 #ifdef USE_FBGEMM
   if (can_use_radix_sort(values, descending)) {
     parallel_sort1d_kernel(values, indices);
@@ -358,7 +232,6 @@ static void topk_kernel(
     int64_t dim,
     bool largest,
     bool sorted) {
-
   auto sizes = self.sizes();
   auto iter = TensorIteratorConfig()
     .check_all_same_dtype(false)
@@ -393,7 +266,7 @@ static void topk_kernel(
 
 } // anonymous namespace
 
-ALSO_REGISTER_AVX512_DISPATCH(sort_stub, &sort_kernel);
-ALSO_REGISTER_AVX512_DISPATCH(topk_stub, &topk_kernel);
+REGISTER_DISPATCH(sort_stub, &sort_kernel);
+REGISTER_DISPATCH(topk_stub, &topk_kernel);
 
 } //at::native

cmake/Dependencies.cmake

@@ -1328,28 +1328,6 @@ if(CAFFE2_CMAKE_BUILDING_WITH_MAIN_REPO AND NOT INTERN_DISABLE_ONNX)
   set(BUILD_SHARED_LIBS ${TEMP_BUILD_SHARED_LIBS})
 endif()
 
-# --[ x86-simd-sort integration
-if(USE_X86_SIMD_SORT)
-  if(NOT CMAKE_SIZEOF_VOID_P EQUAL 8)
-    message(WARNING
-      "x64 operating system is required for x86-simd-sort. "
-      "Not compiling with x86-simd-sort. "
-      "Turn this warning off by USE_X86_SIMD_SORT=OFF.")
-    set(USE_X86_SIMD_SORT OFF)
-  endif()
-
-  if(USE_X86_SIMD_SORT)
-    if(USE_OPENMP AND NOT MSVC)
-      set(USE_XSS_OPENMP ON)
-    else()
-      set(USE_XSS_OPENMP OFF)
-    endif()
-
-    set(XSS_SIMD_SORT_INCLUDE_DIR ${CMAKE_CURRENT_LIST_DIR}/../third_party/x86-simd-sort)
-    include_directories(SYSTEM ${XSS_SIMD_SORT_INCLUDE_DIR})
-  endif()
-endif()
-
 # --[ ATen checks
 set(USE_LAPACK 0)
 

cmake/Summary.cmake

@@ -133,7 +133,6 @@ function(caffe2_print_configuration_summary)
   endif()
   message(STATUS "  BUILD_NVFUSER         : ${BUILD_NVFUSER}")
   message(STATUS "  USE_EIGEN_FOR_BLAS    : ${CAFFE2_USE_EIGEN_FOR_BLAS}")
-  message(STATUS "  USE_X86_SIMD_SORT     : ${USE_X86_SIMD_SORT}")
   message(STATUS "  USE_FBGEMM            : ${USE_FBGEMM}")
   message(STATUS "    USE_FAKELOWP          : ${USE_FAKELOWP}")
   message(STATUS "  USE_KINETO            : ${USE_KINETO}")

test/inductor/test_torchinductor_opinfo.py

@@ -466,9 +466,6 @@ def wrapper_noop_set_seed(op, *args, **kwargs):
     ("nn.functional.interpolate.bicubic", u8): {"atol": 1, "rtol": 0},
     # High atol due to precision loss
     ("nn.functional.interpolate.bicubic", f32): {"atol": 5e-3, "rtol": 0},
-    # reference_in_float can cause erroneous failures in sorting tests
-    "argsort": {"reference_in_float": False},
-    "sort": {"reference_in_float": False},
 }
 
 inductor_override_kwargs["cuda"] = {
@@ -539,9 +536,6 @@ def wrapper_noop_set_seed(op, *args, **kwargs):
     ("index_reduce.amax", f32): {"check_gradient": False},
     ("index_reduce.amax", f16): {"check_gradient": False},
     ("tanh", f16): {"atol": 1e-4, "rtol": 1e-2},
-    # reference_in_float can cause erroneous failures in sorting tests
-    "argsort": {"reference_in_float": False},
-    "sort": {"reference_in_float": False},
 }
 
 inductor_override_kwargs["xpu"] = {
@@ -661,9 +655,6 @@ def wrapper_noop_set_seed(op, *args, **kwargs):
     ("nn.functional.embedding_bag", f64): {"check_gradient": False},
     ("_unsafe_masked_index", f16): {"atol": 1e-5, "rtol": 2e-3},
     ("_unsafe_masked_index_put_accumulate", f16): {"atol": 1e-5, "rtol": 5e-3},
-    # reference_in_float can cause erroneous failures in sorting tests
-    "argsort": {"reference_in_float": False},
-    "sort": {"reference_in_float": False},
 }
 
 # Test with one sample only for following ops