Add accessor for CusparseError error code

Use this to check for CUSPARSE_STATUS_INSUFFICIENT_RESOURCES
when falling back to spgemm ALG2.

Author: izilberter

common/cuda_hip/matrix/csr_kernels.template.cpp

@@ -2534,8 +2534,7 @@ void spgemm(std::shared_ptr<const DefaultExecutor> exec,
         // If estimated buffer size is too large and CUDA > 12.0,  fall back to
         // ALG2
 #if CUDA_VERSION >= 12000
-        const char* error_code = "CUSPARSE_STATUS_INSUFFICIENT_RESOURCES";
-        if (strstr(cse.what(), error_code)) {
+        if (cse.get_error_code() == CUSPARSE_STATUS_INSUFFICIENT_RESOURCES) {
             spgemm_alg = CUSPARSE_SPGEMM_ALG2;
             // Memory estimate for Alg2/Alg3
             sparselib::spgemm_work_estimation(
@@ -2745,8 +2744,7 @@ void advanced_spgemm(std::shared_ptr<const DefaultExecutor> exec,
         // If estimated buffer size is too large and CUDA > 12.0,  fall back to
         // ALG2
 #if CUDA_VERSION >= 12000
-        const char* error_code = "CUSPARSE_STATUS_INSUFFICIENT_RESOURCES";
-        if (strstr(cse.what(), error_code)) {
+        if (cse.get_error_code() == CUSPARSE_STATUS_INSUFFICIENT_RESOURCES) {
             spgemm_alg = CUSPARSE_SPGEMM_ALG2;
             // Memory estimate for Alg2/Alg3
             sparselib::spgemm_work_estimation(

contributors.txt

@@ -25,3 +25,4 @@ Olenik Gregor <[email protected]> HPSim
 Ribizel Tobias <[email protected]> Karlsruhe Institute of Technology
 Riemer Lukas <[email protected]> Karlsruhe Institute of Technology
 Tsai Yuhsiang <[email protected]> National Taiwan University
+Ilya Zilberter <[email protected]> Tech-X Corporation

include/ginkgo/core/base/exception.hpp

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: 2017 - 2024 The Ginkgo authors
+// SPDX-FileCopyrightText: 2017 - 2025 The Ginkgo authors
 //
 // SPDX-License-Identifier: BSD-3-Clause
 
@@ -250,11 +250,18 @@ class CusparseError : public Error {
      */
     CusparseError(const std::string& file, int line, const std::string& func,
                   int64 error_code)
-        : Error(file, line, func + ": " + get_error(error_code))
+        : Error(file, line, func + ": " + get_error(error_code)),
+          err_code(error_code)
     {}
 
+    /**
+     * Returns the error code
+     */
+    int64 get_error_code() const noexcept { return err_code; }
+
 private:
     static std::string get_error(int64 error_code);
+    const int64 err_code;
 };