Merge branch 'cufft_error_message' into 'develop'

Make cufft error message more verbose for allocation errors

See merge request !1655

src/math/cufft.cc

@@ -35,13 +35,17 @@ typedef int CUdeviceptr;
 typedef int cudaStream_t;
 #endif
 
-#define CUFFT_SAFE_CALL(x)                                                                \
-  do {                                                                                    \
-    cufftResult safe_call_result = x;                                                     \
-    if(safe_call_result != CUFFT_SUCCESS) {                                               \
-      std::cerr << "\nerror: " #x " failed with error " << safe_call_result << std::endl; \
-      exit(1);                                                                            \
-    }                                                                                     \
+#define CUFFT_SAFE_CALL(x)                                                                 \
+  do {                                                                                     \
+    cufftResult safe_call_result = x;                                                      \
+    if(safe_call_result != CUFFT_SUCCESS) {                                                \
+      std::cerr << "\nerror: " #x " failed with error " << safe_call_result << std::endl;  \
+      if(safe_call_result == CUFFT_ALLOC_FAILED) {                                         \
+        std::cerr << "cuFFT failed to allocate GPU or CPU memory." << std::endl;           \
+        std::cerr << "Please try to use more nodes for the parallelization." << std::endl; \
+      }                                                                                    \
+      exit(1);                                                                             \
+    }                                                                                      \
   } while(0)
 
 extern "C" void FC_FUNC_(cuda_fft_plan3d, CUDA_FFT_PLAN3D)(cufftHandle **plan, fint * nx, fint * ny, fint * nz, fint * type, cudaStream_t ** stream){