Hi Daniel,
Hi Daniel,
A common workaround is to redirect the output of printf from the CUDA kernel to a buffer and then retrieve the buffer contents for display. Here's a modified version of the code to demonstrate this approach:
#include stdio.h
#include stdlib.h
#include string.h
#include iostream
_global_ void add2(double* v1, const double* v2, char* output) {
int idx = threadIdx.x;
v1[idx] += v2[idx];
sprintf(output, "identity: %d \n", idx); }
mexcuda -ptx test.cu
In the above code snippet, the sprintf function is used to write the output of printf to a character buffer (output). This buffer can then be accessed to retrieve the output generated by the CUDA kernel.
Please bear in mind when working with CUDA kernels in MATLAB and needing to display output, avoid using printf directly within the kernel. Instead, consider using buffer variables to store the output and retrieve it for display outside the kernel.
Hope that answers your question.
