When compiling CUDA device code, you may get the error (with line break for readability):
ptxas warning : Stack size for entry function '_ZN7kernels11print_stuffIiEEvv'
cannot be statically determined
This can have several reasons, like dynamic memory allocation or use of recursion, but those don't matter right now. I want to disable the warning, within some function at least. The thing is, I don't know which token to use to do so. It's no use searching this list (following the suggestion here SO about disabling specific warnings) - because those are warnings in the C/C++ front-end of NVCC, not the assembler.
So how can I disable this warning?
The important point to note is that this is an assembler warning, so none of the usual front end warning suppression options are relevant.
ptxas only supports a very limited number of warning control options. Prior to CUDA 9, only the following were supported:
--suppress-double-demote-warning (-suppress-double-demote-warning)
Suppress the warning that is otherwise emitted when a double precision instruction
is encountered in PTX that is targeted for an SM version that does not have
double precision support
--disable-warnings (-w)
Inhibit all warning messages.
--warn-on-double-precision-use (-warn-double-usage)
Warning if double(s) are used in an instruction.
--warn-on-local-memory-usage (-warn-lmem-usage)
Warning if local memory is used.
--warn-on-spills (-warn-spills)
Warning if registers are spilled to local memory.
--warning-as-error (-Werror)
Make all warnings into errors.
In your case the only option would be to suppress all warnings. Adding -Xptxas='-w' to any nvcc invocation should achieve that.
CUDA 9 and newer add another option ptxas which suppresses the warning you ask about:
--suppress-stack-size-warning (-suppress-stack-size-warning)
Suppress the warning that otherwise is printed when stack size cannot be
determined.
In this case, adding -Xptxas='-suppress-stack-size-warning' to any nvcc invocation should eliminate the warning.