cublasStatust

cublasStatust is not a standard name in the cuBLAS API; the correct type used to report the result of cuBLAS function calls is cublasStatus_t. This enumeration allows cuBLAS functions to communicate success or various error conditions back to the caller in a uniform way.

The cublasStatus_t type defines several named values. The most common is CUBLAS_STATUS_SUCCESS, which indicates that a cuBLAS call completed normally. Other values signal different failure or status conditions, such as CUBLAS_STATUS_NOT_INITIALIZED (the library or handle was not properly initialized), CUBLAS_STATUS_ALLOC_FAILED (memory allocation failure), CUBLAS_STATUS_INVALID_VALUE (an argument value was invalid), CUBLAS_STATUS_ARCH_MISMATCH (the device architecture is not supported by the operation), CUBLAS_STATUS_MAPPING_ERROR (address mapping or access error), CUBLAS_STATUS_NOT_SUPPORTED (the requested operation is not supported on the current device or configuration), CUBLAS_STATUS_EXECUTION_FAILED (an error occurred during kernel execution), and CUBLAS_STATUS_INTERNAL_ERROR (an internal cuBLAS error). The exact set of values may vary slightly by toolkit version, but the general idea is to differentiate success from various error conditions.

Usage typically involves checking the return value of cuBLAS calls and handling errors accordingly. A common pattern is to compare the returned status to CUBLAS_STATUS_SUCCESS and implement appropriate error reporting or fallback logic when it differs. While cuBLAS communicates errors through these statuses, applications should map numeric values to human-readable messages for debugging.

In summary, cublasStatus_t is the cuBLAS mechanism for conveying the outcome of API calls, with a range of statuses that help diagnose issues related to initialization, argument validity, device compatibility, and execution.