[petsc-users] cudaSetDevice

[Karl Rupp]

Hi Harshad,

 > Sometime back we talked about an interface which could handle other
> libraries calling cudaSetDevice simultaneously with PETSc. For example,
> in our case 2 different instances of PETSc calling cudaSetDevice.
>
>  >Sure, but how will we actually share the device between libraries?  What
>  >if the other library was not PETSc, but something else, and they also
>  >called cudaSetDevice, but with a different default mapping strategy?
>
>  >We need an interface that handles this case.
>
> Do we already have any solution for this? If not, can we start looking
> at this case?

I offered to provide a lazy initialization mechanism in order to be able 
to deal with such cases - this is still on my todo-list. Due to other 
obligations I couldn't find the time to implement this yet, but finally 
things are getting better so that I can provide the changes soon.

Best regards,
Karli