IntelPython · vtavana · Mar 6, 2026 · Mar 6, 2026 · Mar 6, 2026 · Mar 6, 2026
@@ -73,5 +73,5 @@ jobs:
       - name: Run mkl_fft tests
         run: |
           source ${{ env.ONEAPI_ROOT }}/setvars.sh
-          pip install scipy mkl-service pytest
+          pip install pytest mkl-service scipy dask
           pytest -s -v --pyargs mkl_fft
@@ -88,7 +88,7 @@ jobs:
 
     strategy:
       matrix:
-        python_ver: ["3.10", "3.11", "3.12", "3.13", "3.14"]
+        python: ["3.10", "3.11", "3.12", "3.13", "3.14"]
         numpy: ['numpy">=2"']
         experimental: [false]
         runner: [ubuntu-latest]
@@ -100,7 +100,7 @@ jobs:
       - name: Download artifact
         uses: actions/download-artifact@70fc10c6e5e1ce46ad2ea6f2b72d43f7d47b13c3 # v8.0.0
         with:
-          name: ${{ env.PACKAGE_NAME }} ${{ runner.os }} Python ${{ matrix.python_ver }}
+          name: ${{ env.PACKAGE_NAME }} ${{ runner.os }} Python ${{ matrix.python }}
 
       - name: Add conda to system path
         run: echo "$CONDA"/bin >> "$GITHUB_PATH"
@@ -119,7 +119,7 @@ jobs:
       - name: Collect dependencies
         run: |
           CHANNELS=(-c "$GITHUB_WORKSPACE"/channel ${{ env.CHANNELS }})
-          conda create -n ${{ env.TEST_ENV_NAME }} "$PACKAGE_NAME" python=${{ matrix.python_ver }} ${{ matrix.numpy }} "${CHANNELS[@]}" --only-deps --dry-run > lockfile
+          conda create -n ${{ env.TEST_ENV_NAME }} "$PACKAGE_NAME" python=${{ matrix.python }} ${{ matrix.numpy }} "${CHANNELS[@]}" --only-deps --dry-run > lockfile
 
       - name: Display lockfile
         run: cat lockfile
@@ -135,15 +135,15 @@ jobs:
         with:
           path: ~/.conda/pkgs
           key:
-            ${{ runner.os }}-conda-${{ env.CACHE_NUMBER }}-python-${{ matrix.python_ver }}-${{hashFiles('lockfile') }}
+            ${{ runner.os }}-conda-${{ env.CACHE_NUMBER }}-python-${{ matrix.python }}-${{hashFiles('lockfile') }}
           restore-keys: |
-            ${{ runner.os }}-conda-${{ env.CACHE_NUMBER }}-python-${{ matrix.python_ver }}-
+            ${{ runner.os }}-conda-${{ env.CACHE_NUMBER }}-python-${{ matrix.python }}-
             ${{ runner.os }}-conda-${{ env.CACHE_NUMBER }}-
 
       - name: Install mkl_fft
         run: |
           CHANNELS=(-c "$GITHUB_WORKSPACE"/channel ${{ env.CHANNELS }})
-          conda create -n ${{ env.TEST_ENV_NAME }} python=${{ matrix.python_ver }} ${{ matrix.numpy }} "$PACKAGE_NAME" pytest scipy "${CHANNELS[@]}"
+          conda create -n ${{ env.TEST_ENV_NAME }} python=${{ matrix.python }} ${{ matrix.numpy }} "$PACKAGE_NAME" pytest scipy dask "${CHANNELS[@]}"
           # Test installed packages
           conda list -n ${{ env.TEST_ENV_NAME }}
 
@@ -155,7 +155,9 @@ jobs:
 
   build_windows:
     runs-on: windows-latest
-
+    defaults:
+      run:
+        shell: cmd /C CALL {0}
     strategy:
       matrix:
         include:
@@ -184,12 +186,13 @@ jobs:
         with:
           miniforge-version: latest
           activate-environment: build
-          python-version: ${{ matrix.python }}
           channels: conda-forge
-          conda-remove-defaults: 'true'
+          python-version: ${{ matrix.python }}
 
       - name: Install conda-build
-        run: conda install -n base conda-build
+        run: |
+          conda install -n base -y conda-build
+          conda list -n base
 
       - name: Cache conda packages
         uses: actions/cache@cdf6c1fa76f9f475f3d7449005a359c84ca0f306 # v5.0.3
@@ -203,12 +206,8 @@ jobs:
             ${{ runner.os }}-conda-${{ env.CACHE_NUMBER }}-python-${{ matrix.python }}-
             ${{ runner.os }}-conda-${{ env.CACHE_NUMBER }}-
 
-      - name: Setup MSVC
-        uses: ilammy/msvc-dev-cmd@0b201ec74fa43914dc39ae48a89fd1d8cb592756 # v1.13.0
-
       - name: Build conda package with NumPy 2.x
         run: |
-          conda activate
           conda build --no-test --python ${{ matrix.python }} --numpy ${{ matrix.numpy }} -c conda-forge --override-channels conda-recipe-cf
 
       - name: Store conda paths as envs
@@ -231,7 +230,7 @@ jobs:
 
     strategy:
       matrix:
-        python_ver: ["3.10", "3.11", "3.12", "3.13", "3.14"]
+        python: ["3.10", "3.11", "3.12", "3.13", "3.14"]
         numpy: ['numpy">=2"']
         experimental: [false]
         runner: [windows-latest]
@@ -244,15 +243,14 @@ jobs:
       - name: Download artifact
         uses: actions/download-artifact@70fc10c6e5e1ce46ad2ea6f2b72d43f7d47b13c3 # v8.0.0
         with:
-          name: ${{ env.PACKAGE_NAME }} ${{ runner.os }} Python ${{ matrix.python_ver }}
+          name: ${{ env.PACKAGE_NAME }} ${{ runner.os }} Python ${{ matrix.python }}
 
       - uses: conda-incubator/setup-miniconda@fc2d68f6413eb2d87b895e92f8584b5b94a10167 # v3.3.0
         with:
           miniforge-version: latest
-          activate-environment: ${{ env.TEST_ENV_NAME }}
-          python-version: ${{ matrix.python_ver }}
           channels: conda-forge
-          conda-remove-defaults: 'true'
+          activate-environment: ${{ env.TEST_ENV_NAME }}
+          python-version: ${{ matrix.python }}
 
       - name: Create conda channel with the artifact bit
         shell: cmd /C CALL {0}
@@ -291,7 +289,7 @@ jobs:
           FOR /F "tokens=* USEBACKQ" %%F IN (`python -c "%SCRIPT%"`) DO (
              SET PACKAGE_VERSION=%%F
           )
-          conda install -n ${{ env.TEST_ENV_NAME }} ${{ env.PACKAGE_NAME }}=%PACKAGE_VERSION% python=${{ matrix.python_ver }} ${{ matrix.numpy }} -c ${{ env.workdir }}/channel ${{ env.CHANNELS }} --only-deps --dry-run > lockfile
+          conda install -n ${{ env.TEST_ENV_NAME }} ${{ env.PACKAGE_NAME }}=%PACKAGE_VERSION% python=${{ matrix.python }} ${{ matrix.numpy }} -c ${{ env.workdir }}/channel ${{ env.CHANNELS }} --only-deps --dry-run > lockfile
 
       - name: Display lockfile content
         shell: pwsh
@@ -304,9 +302,9 @@ jobs:
         with:
           path: /home/runner/conda_pkgs_dir
           key:
-            ${{ runner.os }}-conda-${{ env.CACHE_NUMBER }}-python-${{ matrix.python_ver }}-${{hashFiles('lockfile') }}
+            ${{ runner.os }}-conda-${{ env.CACHE_NUMBER }}-python-${{ matrix.python }}-${{hashFiles('lockfile') }}
           restore-keys: |
-            ${{ runner.os }}-conda-${{ env.CACHE_NUMBER }}-python-${{ matrix.python_ver }}-
+            ${{ runner.os }}-conda-${{ env.CACHE_NUMBER }}-python-${{ matrix.python }}-
             ${{ runner.os }}-conda-${{ env.CACHE_NUMBER }}-
 
       - name: Install mkl_fft
@@ -320,8 +318,8 @@ jobs:
           FOR /F "tokens=* USEBACKQ" %%F IN (`python -c "%SCRIPT%"`) DO (
              SET PACKAGE_VERSION=%%F
           )
-          SET "TEST_DEPENDENCIES=pytest scipy"
-          conda install -n ${{ env.TEST_ENV_NAME }} ${{ env.PACKAGE_NAME }}=%PACKAGE_VERSION% %TEST_DEPENDENCIES% python=${{ matrix.python_ver }} ${{ matrix.numpy }} -c ${{ env.workdir }}/channel ${{ env.CHANNELS }}
+          SET "TEST_DEPENDENCIES=pytest scipy dask"
+          conda install -n ${{ env.TEST_ENV_NAME }} ${{ env.PACKAGE_NAME }}=%PACKAGE_VERSION% %TEST_DEPENDENCIES% python=${{ matrix.python }} ${{ matrix.numpy }} -c ${{ env.workdir }}/channel ${{ env.CHANNELS }}
 
       - name: Report content of test environment
         shell: cmd /C CALL {0}

@@ -142,7 +142,7 @@ jobs:
       - name: Install mkl_fft
         run: |
           CHANNELS=(-c "$GITHUB_WORKSPACE"/channel ${{ env.CHANNELS }})
-          conda create -n ${{ env.TEST_ENV_NAME }} "$PACKAGE_NAME"=${{ env.PACKAGE_VERSION }} python=${{ matrix.python }} pytest "${CHANNELS[@]}"
+          conda create -n ${{ env.TEST_ENV_NAME }} "$PACKAGE_NAME"=${{ env.PACKAGE_VERSION }} python=${{ matrix.python }} pytest dask "${CHANNELS[@]}"
           conda install -n ${{ env.TEST_ENV_NAME }} "scipy>=1.10" "${CHANNELS[@]}"
           # Test installed packages
           conda list -n ${{ env.TEST_ENV_NAME }}
@@ -155,7 +155,9 @@ jobs:
 
   build_windows:
     runs-on: windows-latest
-
+    defaults:
+      run:
+        shell: cmd /C CALL {0}
     strategy:
       matrix:
         python: ["3.10", "3.11", "3.12", "3.13", "3.14"]
@@ -173,14 +175,13 @@ jobs:
         with:
           miniforge-version: latest
           activate-environment: build
-          python-version: ${{ matrix.python }}
           channels: conda-forge
-          conda-remove-defaults: 'true'
+          python-version: ${{ matrix.python }}
 
       - name: Install conda-build
         run: |
-           conda activate
-           conda install -n base conda-build
+          conda install -n base -y conda-build
+          conda list -n base
 
       - name: Cache conda packages
         uses: actions/cache@cdf6c1fa76f9f475f3d7449005a359c84ca0f306 # v5.0.3
@@ -194,12 +195,8 @@ jobs:
             ${{ runner.os }}-conda-${{ env.CACHE_NUMBER }}-python-${{ matrix.python }}-
             ${{ runner.os }}-conda-${{ env.CACHE_NUMBER }}-
 
-      - name: Setup MSVC
-        uses: ilammy/msvc-dev-cmd@0b201ec74fa43914dc39ae48a89fd1d8cb592756 # v1.13.0
-
       - name: Build conda package
         run: |
-          conda activate
           conda build --no-test --python ${{ matrix.python }} -c https://software.repos.intel.com/python/conda -c conda-forge --override-channels conda-recipe
 
       - name: Store conda paths as envs
@@ -239,10 +236,9 @@ jobs:
       - uses: conda-incubator/setup-miniconda@fc2d68f6413eb2d87b895e92f8584b5b94a10167 # v3.3.0
         with:
           miniforge-version: latest
+          channels: conda-forge
           activate-environment: ${{ env.TEST_ENV_NAME }}
           python-version: ${{ matrix.python }}
-          channels: conda-forge
-          conda-remove-defaults: 'true'
 
       - name: Create conda channel with the artifact bit
         shell: cmd /C CALL {0}
@@ -310,7 +306,7 @@ jobs:
           FOR /F "tokens=* USEBACKQ" %%F IN (`python -c "%SCRIPT%"`) DO (
              SET PACKAGE_VERSION=%%F
           )
-          SET "TEST_DEPENDENCIES=pytest"
+          SET "TEST_DEPENDENCIES=pytest dask"
           conda install -n ${{ env.TEST_ENV_NAME }} ${{ env.PACKAGE_NAME }}=%PACKAGE_VERSION% %TEST_DEPENDENCIES% python=${{ matrix.python }} -c ${{ env.workdir }}/channel ${{ env.CHANNELS }}
           conda install -n ${{ env.TEST_ENV_NAME }} scipy -c ${{ env.workdir }}/channel ${{ env.CHANNELS }}
           }

@@ -32,6 +32,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 * Enabled support of Python 3.13 [gh-164](https://github.com/IntelPython/mkl_fft/pull/164)
+* Added a new interface for FFT module of Dask accessible through `mkl_fft.interfaces.dask_fft` [gh-214](https://github.com/IntelPython/mkl_fft/pull/214)
 
 ### Changed
 * Dropped support for `scipy.fftpack` interface [gh-185](https://github.com/IntelPython/mkl_fft/pull/185)

@@ -1,3 +1,3 @@
 set MKLROOT=%PREFIX%
-%PYTHON% -m pip install --no-build-isolation --no-deps .
+%PYTHON% setup.py build --force install --old-and-unmanageable
 if errorlevel 1 exit 1
@@ -1,5 +1,6 @@
 #!/bin/bash -x
 
-export MKLROOT=$PREFIX
-export CFLAGS="-I$PREFIX/include $CFLAGS"
-$PYTHON -m pip install --no-build-isolation --no-deps .
+# make sure that compiler has been sourced, if necessary
+
+export MKLROOT=${PREFIX}
+$PYTHON setup.py build --force install --old-and-unmanageable
@@ -0,0 +1,16 @@
+c_compiler:                   # [linux]
+    - gcc                     # [linux]
+cxx_compiler:                 # [linux]
+    - gxx                     # [linux]
+cxx_compiler_version:         # [linux]
+    - '14'                    # [linux]
+c_stdlib:                     # [linux]
+    - sysroot                 # [linux]
+c_stdlib_version:             # [linux]
+    - '2.28'                  # [linux]
+c_stdlib:                     # [win]
+    - vs                      # [win]
+cxx_compiler:                 # [win]
+    - vs2022                  # [win]
+c_compiler:                   # [win]
+    - vs2022                  # [win]
@@ -1,29 +1,33 @@
-{% set version = "2.2.0dev1" %}
-{% set buildnumber = 0 %}
-
 package:
     name: mkl_fft
-    version: {{ version }}
+    version: {{ GIT_DESCRIBE_TAG }}
 
 source:
     path: ../
 
 build:
-    number: {{ buildnumber }}
+    number: {{ GIT_DESCRIBE_NUMBER }}
+    script_env:
+      - WHEELS_OUTPUT_FOLDER
     ignore_run_exports:
       - blas
 
 requirements:
     build:
       - {{ compiler('c') }}
+      - {{ stdlib('c') }}
     host:
       - python
+      - python-gil     # [py>=314]
+      - pip
       - setuptools >=77
       - mkl-devel
       - cython
       - numpy
+      - wheel  >=0.41.3
     run:
       - python
+      - python-gil     # [py>=314]
       - mkl-service
       - numpy
 
@@ -33,14 +37,22 @@ test:
     requires:
       - pytest
       - scipy >=1.10
+      - dask
     imports:
       - mkl_fft
       - mkl_fft.interfaces
-      - mkl_fft.interfaces.numpy_fft
-      - mkl_fft.interfaces.scipy_fft
 
 about:
     home: http://github.com/IntelPython/mkl_fft
     license: BSD-3-Clause
     license_file: LICENSE.txt
-    summary: NumPy-based implementation of Fast Fourier Transform using Intel® oneAPI Math Kernel Library (OneMKL)
+    summary: NumPy-based implementation of Fast Fourier Transform using Intel® oneAPI Math Kernel Library (oneMKL)
+    description: |
+        <strong>LEGAL NOTICE: Use of this software package is subject to the
+        software license agreement (as set forth above, in the license section of
+        the installed Conda package and/or the README file) and all notices,
+        disclaimers or license terms for third party or open source software
+        included in or with the software.</strong>
+        <br/><br/>
+        EULA: <a href="https://opensource.org/licenses/BSD-3-Clause" target="_blank">BSD-3-Clause</a>
+        <br/><br/>
@@ -11,6 +11,6 @@ c_stdlib_version:             # [linux]
 c_stdlib:                     # [win]
     - vs                      # [win]
 cxx_compiler:                 # [win]
-    - vs2017                  # [win]
+    - vs2022                  # [win]
 c_compiler:                   # [win]
-    - vs2017                  # [win]
+    - vs2022                  # [win]
@@ -38,6 +38,7 @@ test:
       - pytest
       # This is a temporary python restriction
       - scipy >=1.10   # [py<314]
+      - dask
     imports:
       - mkl_fft
       - mkl_fft.interfaces

@@ -1,5 +1,5 @@
 # Interfaces
-The `mkl_fft` package provides interfaces that serve as drop-in replacements for equivalent functions in NumPy and SciPy.
+The `mkl_fft` package provides interfaces that serve as drop-in replacements for equivalent functions in NumPy, SciPy, and Dask.
 
 ---
 
@@ -124,3 +124,43 @@ with mkl_fft.set_workers(4):
     y = scipy.signal.fftconvolve(a, a)  # Note that Nthr:4
 # MKL_VERBOSE FFT(dcbo256x128,input_strides:{0,128,1},output_strides:{0,128,1},bScale:3.05176e-05,tLim:4,unaligned_output,desc:0x563aefe86180) 187.37us CNR:OFF Dyn:1 FastMM:1 TID:0  NThr:4
 ```
+
+---
+
+## Dask interface - `mkl_fft.interfaces.dask_fft`
+
+This interface is a drop-in replacement for the [`dask.fft`](https://dask.pydata.org/en/latest/array-api.html#fast-fourier-transforms) module and includes **all** the functions available there:
+
+* complex-to-complex FFTs: `fft`, `ifft`, `fft2`, `ifft2`, `fftn`, `ifftn`.
+
+* real-to-complex and complex-to-real FFTs: `rfft`, `irfft`, `rfft2`, `irfft2`, `rfftn`, `irfftn`.
+
+* Hermitian FFTs: `hfft`, `ihfft`.
+
+* Helper routines: `fft_wrap`, `fftfreq`, `rfftfreq`, `fftshift`, `ifftshift`. These routines serve as a fallback to the Dask implementation and are included for completeness.
+
+The following example shows how to use this interface for calculating a 2D FFT.
+
+```python
+import numpy, dask
+import mkl_fft.interfaces.dask_fft as dask_fft
+
+a = numpy.random.randn(128, 64) + 1j*numpy.random.randn(128, 64)
+x = dask.array.from_array(a, chunks=(64, 64))
+lazy_res = dask_fft.fft(x)
+mkl_res = lazy_res.compute()
+np_res = numpy.fft.fft(a)
+numpy.allclose(mkl_res, np_res)
+# True
+
+# There are two chunks in this example based on the size of input array (128, 64) and chunk size (64, 64)
+# to confirm that MKL FFT is called twice, turn on verbosity
+import mkl
+mkl.verbose(1)
+# True
+
+mkl_res = lazy_res.compute()  # MKL_VERBOSE FFT is shown twice below which means MKL FFT is called twice
+# MKL_VERBOSE oneMKL 2024.0 Update 2 Patch 2 Product build 20240823 for Intel(R) 64 architecture Intel(R) Advanced Vector Extensions 512 (Intel(R) AVX-512) with support for INT8, BF16, FP16 (limited) instructions, and Intel(R) Advanced Matrix Extensions (Intel(R) AMX) with INT8 and BF16, Lnx 3.80GHz intel_thread
+# MKL_VERBOSE FFT(dcfo64*64,input_strides:{0,1},output_strides:{0,1},input_distance:64,output_distance:64,bScale:0.015625,tLim:32,unaligned_input,desc:0x7fd000010e40) 432.84us CNR:OFF Dyn:1 FastMM:1 TID:0  NThr:112
+# MKL_VERBOSE FFT(dcfo64*64,input_strides:{0,1},output_strides:{0,1},input_distance:64,output_distance:64,bScale:0.015625,tLim:32,unaligned_input,desc:0x7fd480011300) 499.00us CNR:OFF Dyn:1 FastMM:1 TID:0  NThr:112
+```