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CUDA tutorial: Difference between revisions
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* Constant memory | * Constant memory | ||
= | = A few basic CUDA operations = <!--T:8--> | ||
== CUDA | == CUDA memory allocation == | ||
* cudaMalloc((void**)&array, size) | * cudaMalloc((void**)&array, size) | ||
** Allocates object in the device memory. Requires address of a pointer of allocated array and size. | ** Allocates object in the device memory. Requires address of a pointer of allocated array and size. | ||
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** Deallocates object from the memory. Requires just a pointer to the array. | ** Deallocates object from the memory. Requires just a pointer to the array. | ||
== CUDA | == CUDA data transfer == <!--T:9--> | ||
* cudaMemcpy(array_dest, array_orig, size, direction) | * cudaMemcpy(array_dest, array_orig, size, direction) | ||
** Copy the data from either device to host or host to device . Requires pointers to the arrays, size and the direction type (cudaMemcpyHostToDevice, cudaMemcpyDeviceToHost, cudaMemcpyDeviceToDevice, etc) | ** Copy the data from either device to host or host to device. Requires pointers to the arrays, size and the direction type (cudaMemcpyHostToDevice, cudaMemcpyDeviceToHost, cudaMemcpyDeviceToDevice, etc.) | ||
* cudaMemcpyAsync | * cudaMemcpyAsync | ||
** Same as cudaMemcpy, but transfers the data asynchronously which means it' | ** Same as cudaMemcpy, but transfers the data asynchronously which means it doesn't block the execution of other processes. | ||
= First CUDA C Program= <!--T:10--> | = First CUDA C Program= <!--T:10--> | ||