Matrix Multiplication with Diagonal Packing

seyda · February 24, 2025, 11:36pm

Hello everyone, I was cheecking the matrix multiplication (MM) in the OpenFHE logreg-training repository and it implements the matrix multiplication considering row-major packing, If I understood it correctly.

I was wondering If there is any open-sourced implementation of MM with diagonal packing, as it is shown to optimize MM by a lot in this paper.

Thank you so much.

ypolyakov · February 25, 2025, 3:25am

There is a proof-of-concept implementation of a more efficient MM method from Secure Outsourced Matrix Computation and Application to Neural Networks at openfhe-development/src/pke/examples/matrix-mult-examples.cpp at polyakov-matrix-mult · openfheorg/openfhe-development · GitHub We are going incorporate this method in the numpy-like matrix arithmetic library (for Python developers) that is being developed now.

seyda · March 5, 2025, 6:54pm

Hi, thank you so much for your answer! I tried installing the openfhe-matrix-mult branch by following this guideline but got an error.

OS: macOS Sonoma 14.5 (23F79)
cmake version: 3.29.0

Here is the full error:

(base) /path/ % git clone --branch polyakov-matrix-mult --single-branch https://github.com/openfheorg/openfhe-development openfhe-matrix-mult
(base) /path/ % cd openfhe-matrix-mult
(base) /path/to/openfhe-matrix-mult % mkdir cmake-build-debug
(base) /path/to/openfhe-matrix-mult % cd cmake-build-debug 
(base) /path/to/cmake-build-debug % cmake -DCMAKE_CROSSCOMPILING=1 -DRUN_HAVE_STD_REGEX=0 -DRUN_HAVE_POSIX_REGEX=0 ..
cmake ..
CMake Warning (dev) at /opt/homebrew/Cellar/cmake/3.29.0/share/cmake/Modules/CMakeDetermineSystem.cmake:175 (message):
  CMAKE_CROSSCOMPILING has been set by the project, toolchain file, or user.
  CMake is resetting it to false because CMAKE_SYSTEM_NAME was not set.  To
  indicate cross compilation, only CMAKE_SYSTEM_NAME needs to be set.
Call Stack (most recent call first):
  CMakeLists.txt:26 (project)
This warning is for project developers.  Use -Wno-dev to suppress it.

-- The C compiler identification is AppleClang 15.0.0.15000309
-- The CXX compiler identification is AppleClang 15.0.0.15000309
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /Library/Developer/CommandLineTools/usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /Library/Developer/CommandLineTools/usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Building in Release mode
-- BUILD_UNITTESTS:  ON
-- BUILD_EXAMPLES:   ON
-- BUILD_BENCHMARKS: ON
-- BUILD_EXTRAS:     OFF
-- BUILD_STATIC:     OFF
-- BUILD_SHARED:     ON
-- GIT_SUBMOD_AUTO:  ON
-- WITH_BE2:         OFF
-- WITH_BE4:         OFF
-- WITH_NTL:         OFF
-- WITH_TCM:         OFF
-- WITH_OPENMP:      ON
-- NATIVE_SIZE:      64
-- CKKS_M_FACTOR:    1
-- WITH_NATIVEOPT:   OFF
-- WITH_COVTEST:     OFF
-- WITH_NOISE_DEBUG: OFF
-- USE_MACPORTS:     OFF
***** INSTALL IS AT /usr/local; to change, run cmake with -DCMAKE_INSTALL_PREFIX=/your/path
-- Architecture is arm64
-- Looking for sys/types.h
-- Looking for sys/types.h - found
-- Looking for stdint.h
-- Looking for stdint.h - found
-- Looking for stddef.h
-- Looking for stddef.h - found
-- Check size of __int128
-- Check size of __int128 - done
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-- Check size of uint64_t - done
-- NATIVEINT is set to 64
-- MATHBACKEND is set to 4
-- MATHBACKEND set to 4. Setting WITH_BE4 to ON
-- Apple M1 detected
-- OPENMP_LIBRARIES: /opt/homebrew/opt/libomp/lib
-- OPENMP_INCLUDES: /opt/homebrew/opt/libomp/include
-- OpenMP_CXX_FLAGS: -Xpreprocessor -fopenmp -lomp -Wno-unused-command-line-argument
-- OpenMP_CXX_LIB_NAMES: libomp
-- Found OpenMP_C: -Xpreprocessor -fopenmp -lomp -Wno-unused-command-line-argument
-- Found OpenMP_CXX: -Xpreprocessor -fopenmp -lomp -Wno-unused-command-line-argument (found version "5.0")
-- Found OpenMP: TRUE (found version "5.0")
-- Found Git: /usr/bin/git (found version "2.39.3 (Apple Git-146)")
-- Submodule update
Synchronizing submodule url for 'third-party/cereal'
Synchronizing submodule url for 'third-party/google-benchmark'
Synchronizing submodule url for 'third-party/google-test'
Synchronizing submodule url for 'third-party/gperftools'
-- git version: v1.5.5-14-ge451e50e normalized to 1.5.5.14
-- Version: 1.5.5.14
-- Performing Test HAVE_CXX_FLAG_STD_CXX11
-- Performing Test HAVE_CXX_FLAG_STD_CXX11 - Success
-- Performing Test HAVE_CXX_FLAG_WALL
-- Performing Test HAVE_CXX_FLAG_WALL - Success
-- Performing Test HAVE_CXX_FLAG_WEXTRA
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-- Performing Test HAVE_CXX_FLAG_WNO_DEPRECATED - Success
-- Performing Test HAVE_CXX_FLAG_WSTRICT_ALIASING
-- Performing Test HAVE_CXX_FLAG_WSTRICT_ALIASING - Success
-- Performing Test HAVE_CXX_FLAG_WD654
-- Performing Test HAVE_CXX_FLAG_WD654 - Failed
-- Performing Test HAVE_CXX_FLAG_WTHREAD_SAFETY
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-- Performing Test HAVE_THREAD_SAFETY_ATTRIBUTES
-- Performing Test HAVE_THREAD_SAFETY_ATTRIBUTES
-- Performing Test HAVE_THREAD_SAFETY_ATTRIBUTES -- failed to compile
-- Performing Test HAVE_CXX_FLAG_COVERAGE
-- Performing Test HAVE_CXX_FLAG_COVERAGE - Success
-- Performing Test HAVE_STD_REGEX
-- Performing Test HAVE_STD_REGEX
-- Performing Test HAVE_STD_REGEX -- success
-- Performing Test HAVE_GNU_POSIX_REGEX
-- Performing Test HAVE_GNU_POSIX_REGEX
-- Performing Test HAVE_GNU_POSIX_REGEX -- failed to compile
-- Performing Test HAVE_POSIX_REGEX
-- Performing Test HAVE_POSIX_REGEX
-- Performing Test HAVE_POSIX_REGEX -- success
-- Performing Test HAVE_STEADY_CLOCK
-- Performing Test HAVE_STEADY_CLOCK
-- Performing Test HAVE_STEADY_CLOCK -- success
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Success
-- Found Threads: TRUE
-- Configuring done (4.4s)
-- Generating done (0.2s)
-- Build files have been written to: /Users/seydanurguzelhan/CLionProjects/openfhe-matrix-mult/cmake-build-debug
-- Building in Release mode
-- BUILD_UNITTESTS:  ON
-- BUILD_EXAMPLES:   ON
-- BUILD_BENCHMARKS: ON
-- BUILD_EXTRAS:     OFF
-- BUILD_STATIC:     OFF
-- BUILD_SHARED:     ON
-- GIT_SUBMOD_AUTO:  ON
-- WITH_BE2:         OFF
-- WITH_BE4:         OFF
-- WITH_NTL:         OFF
-- WITH_TCM:         OFF
-- WITH_OPENMP:      ON
-- NATIVE_SIZE:      64
-- CKKS_M_FACTOR:    1
-- WITH_NATIVEOPT:   OFF
-- WITH_COVTEST:     OFF
-- WITH_NOISE_DEBUG: OFF
-- USE_MACPORTS:     OFF
***** INSTALL IS AT /usr/local; to change, run cmake with -DCMAKE_INSTALL_PREFIX=/your/path
-- Architecture is arm64
-- NATIVEINT is set to 64
-- MATHBACKEND is set to 4
-- MATHBACKEND set to 4. Setting WITH_BE4 to ON
-- Apple M1 detected
-- OPENMP_LIBRARIES: /opt/homebrew/opt/libomp/lib
-- OPENMP_INCLUDES: /opt/homebrew/opt/libomp/include
-- OpenMP_CXX_FLAGS: -Xpreprocessor -fopenmp -lomp -Wno-unused-command-line-argument
-- OpenMP_CXX_LIB_NAMES: libomp
-- Submodule update
-- git version: v1.5.5-14-ge451e50e normalized to 1.5.5.14
-- Version: 1.5.5.14
-- Performing Test HAVE_THREAD_SAFETY_ATTRIBUTES -- failed to compile
-- Performing Test HAVE_STD_REGEX -- success
-- Performing Test HAVE_GNU_POSIX_REGEX -- failed to compile
-- Performing Test HAVE_POSIX_REGEX -- success
-- Performing Test HAVE_STEADY_CLOCK -- success
-- Configuring done (0.2s)
-- Generating done (0.2s)
-- Build files have been written to: /Users/seydanurguzelhan/CLionProjects/openfhe-matrix-mult/cmake-build-debug
(base) /path/to/openfhe cmake-build-debug % make
-- Copied demoData files
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In file included from  /path/to/openfhe-matrix-mult/src/pke/lib/scheme/ckksrns/schemeswitching-data-serializer.cpp:31:
In file included from  /path/to/openfhe-matrix-mult/src/pke/include/scheme/ckksrns/schemeswitching-data-serializer.h:34:
 /path/to/openfhe/openfhe-matrix-mult/src/pke/include/cryptocontext.h:696:41: error: instantiation of variable 'lbcrypto::CryptoContextImpl<lbcrypto::DCRTPolyImpl<bigintdyn::mubintvec<bigintdyn::ubint<unsigned long long>>>>::s_evalMultKeyMap' required here, but no definition is available [-Werror,-Wundefined-var-template]
            CryptoContextImpl<Element>::s_evalMultKeyMap[key] = vec;
                                        ^
 /path/to/openfhe/openfhe-matrix-mult/src/pke/include/cryptocontext.h:339:65: note: forward declaration of template entity is here
    static std::map<std::string, std::vector<EvalKey<Element>>> s_evalMultKeyMap;
                                                                ^
 /path/to/openfhe-matrix-mult/src/pke/include/cryptocontext.h:696:41: note: add an explicit instantiation declaration to suppress this warning if 'lbcrypto::CryptoContextImpl<lbcrypto::DCRTPolyImpl<bigintdyn::mubintvec<bigintdyn::ubint<unsigned long long>>>>::s_evalMultKeyMap' is explicitly instantiated in another translation unit
            CryptoContextImpl<Element>::s_evalMultKeyMap[key] = vec;
                                        ^
1 error generated.
make[2]: *** [src/pke/CMakeFiles/pkeobj.dir/lib/scheme/ckksrns/schemeswitching-data-serializer.cpp.o] Error 1
make[1]: *** [src/pke/CMakeFiles/pkeobj.dir/all] Error 2
make: *** [all] Error 2

ypolyakov · March 6, 2025, 12:24am

I’ve rebased the polyakov-matrix-mult branch to OpenFHE v1.2.3 (it was based on v1.2.0 previously). This should fix the compilation problem with Apple clang.

Topic		Replies	Views
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Matrix Multiplication with Diagonal Packing

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