https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120216

--- Comment #4 from Benjamin Schulz <schulz.benjamin at googlemail dot com> ---
I did a benchmark here with my new card :

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120679 

In many nvidia graphics cards on a pci bus, unified shared memory, in form of
hmm is currently not very suitable due to low speed. Perhaps this is an issue
of Nvidia's cuda implementation? So the recommendation, for now, is to work
with mapping macros.

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