cudaError

cudaError is an enumeration type defined in the CUDA Toolkit that represents the various error conditions that can occur during CUDA operations. When a CUDA API call fails, it returns a cudaError_t value. This value can then be checked to determine the specific reason for the failure. Common cudaError values include cudaSuccess, indicating that the operation completed without error, and various other codes such as cudaErrorInvalidValue, cudaErrorMemoryAllocation, and cudaErrorLaunchFailure, each signifying a distinct problem.

Developers typically use the cudaGetLastError() function to retrieve the most recent error reported by the CUDA runtime. This function returns a cudaError_t. By comparing the returned value with the defined cudaError enumeration constants, developers can identify and handle specific errors in their CUDA applications. For instance, if cudaGetLastError() returns cudaErrorMemoryAllocation, it indicates that the system ran out of memory for a requested allocation.

Understanding and handling cudaError codes is crucial for developing robust and reliable CUDA programs. Proper error checking allows for graceful failure, debugging, and improved application stability. Many CUDA development environments and libraries provide tools and utilities to assist in the diagnosis and resolution of cudaError issues. Consulting the CUDA documentation for a comprehensive list of cudaError codes and their meanings is recommended for effective error management.