How to use clCreateProgramWithBinary in OpenCL?
opencl
Solution
After you compile your program, you can get its binary code with clGetProgramInfo, and then save it to a file.
Example code (not tried to compile, but should be something along these lines):
program = clCreateProgramWithSource(clctx, 1, &dumbkernelsource, NULL, &errcode);
errcode = clBuildProgram(program, env->num_devices, env->device, NULL, NULL, NULL);
int number_of_binaries;
char **binary;
int *binary_sizes;
errcode = clGetProgramInfo(program, CL_PROGRAM_BINARY_SIZES, NULL, 0, &number_of_binaries);
binary_sizes = new int[number_of_binaries];
binary = new char*[number_of_binaries];
errcode = clGetProgramInfo(program, CL_PROGRAM_BINARY_SIZES, binary_sizes, number_of_binaries*sizeof(int), &number_of_binaries);
for (int i = 0; i < number_of_binaries; ++i) binary[i] = new char[binary_sizes[i]];
errcode = clGetProgramInfo(program, CL_PROGRAM_BINARIES, binary, number_of_binaries*sizeof(char*), &number_of_binaries);
Problem
I'm trying to just get a basic program to work using clCreateProgramWithBinary. This is so I know how to use it rather than a "true" application. I see that one of the parameters is a list of binaries. How exactly would I go about creating a binary to test with? I have some test code which creates a program from source, builds and enqueues it. Is there a binary created at some point during this process which I can feed into clCreateProgramWithBinary? Here is some of my code, just to give an idea of my overall flow. I've omitted comments and error checks for simplicity. ``` program = clCreateProgramWithSource(clctx, 1, &dumbkernelsource, NULL, &errcode); errcode = clBuildProgram(program, env->num_devices, env->device, NULL, NULL, NULL); mykernel = clCreateKernel(program, "flops", &errcode); errcode = clGetKernelWorkGroupInfo(mykernel, *(env->device), CL_KERNEL_WORK_GROUP_SIZE, sizeof(local), &local, NULL); global = num_workgroups * local; errcode = clEnqueueNDRangeKernel(commands, mykernel, 1, NULL, &global, &local, 0, NULL, NULL); ```