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Setting limit to value is a request by the application to update the current limit maintained by the thread. The driver is free to modify the requested value to meet h/w requirements (this could be clamping to minimum or maximum values, rounding up to nearest element size, etc). The application can use cudaThreadGetLimit() to find out exactly what the limit has been set to.
Setting each cudaLimit has its own specific restrictions, so each is discussed here.
- cudaLimitStackSize controls the stack size of each GPU thread. This limit is only applicable to devices of compute capability 2.0 and higher. Attempting to set this limit on devices of compute capability less than 2.0 will result in the error cudaErrorUnsupportedLimit being returned.
- cudaLimitPrintfFifoSize controls the size of the FIFO used by the printf() device system call. Setting cudaLimitPrintfFifoSize must be performed before launching any kernel that uses the printf() device system call, otherwise cudaErrorInvalidValue will be returned. This limit is only applicable to devices of compute capability 2.0 and higher. Attempting to set this limit on devices of compute capability less than 2.0 will result in the error cudaErrorUnsupportedLimit being returned.
- cudaLimitMallocHeapSize controls the size of the heap used by the malloc() and free() device system calls. Setting cudaLimitMallocHeapSize must be performed before launching any kernel that uses the malloc() or free() device system calls, otherwise cudaErrorInvalidValue will be returned. This limit is only applicable to devices of compute capability 2.0 and higher. Attempting to set this limit on devices of compute capability less than 2.0 will result in the error cudaErrorUnsupportedLimit being returned.
- Parameters:
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| limit | - Limit to set |
| value | - Size in bytes of limit |
- Returns:
- cudaSuccess, cudaErrorUnsupportedLimit, cudaErrorInvalidValue
- Note:
- Note that this function may also return error codes from previous, asynchronous launches.
- See also:
- cudaThreadGetLimit
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