visibility what thread contains to what SM

Accelerated Computing CUDA CUDA Programming and Performance
1

hi,

to finish our project we need to know on what SM each thread is running.
do annyone know how we could solve this problem?

thanks.

2

Search the forums for “smid”.

3 
static __device__ __inline__ uint32_t __smid()
{
    uint32_t smid;
    asm volatile("mov.u32 %0, %%smid;" : "=r"(smid));
    return smid;
}
4

when i stand the ptx-dukumentation right the smid could change at running time.
is there any other possibility to have a look at all threads, (not change any id’s)?

thanks

5

@MisterAHA,

As of CUDA 5.5 a thread block may change SMs if the kernel is using CUDA Dynamic Parallelism or if the application is using the Nsight Visual Studio Edition CUDA debugger in pre-emption mode. Future versions of CUDA may change location on other events.

6

What is the use case that requires knowing which SM a particular thread is running on?