Toggle table of contents sidebar
fence¶
Header File: <Kokkos_Core.hpp>
Usage:
Blocks on completion of all outstanding asynchronous Kokkos operations. That includes parallel dispatch (e.g. parallel_for(), parallel_reduce() and parallel_scan()) as well as asynchronous data operations such as three-argument deep_copy.
Note: there is a execution space instance specific fence too: ExecutionSpaceConcept
void Kokkos::fence(const std::string& label);Parameters¶
label: A label to identify a specific fence in fence profiling operations. label does not have to be unique.
Kokkos::fence() cannot be called inside an existing parallel region (i.e. inside the operator() of a functor or lambda).
Blocks on completion of all outstanding asynchronous works. Side effects of outstanding work will be observable upon completion of the fence call - that means Kokkos::fence() implies a memory fence.
Kokkos::Timer timer;
// This operation is asynchronous, without a fence
// one would time only the launch overhead
Kokkos::parallel_for("Test", N, functor);
Kokkos::fence();
double time = timer.seconds();
Use with asynchronous deep copy¶
Kokkos::deep_copy(exec1, a,b);
Kokkos::deep_copy(exec2, a,b);
// do some stuff which doesn't touch a or b
Kokkos::parallel_for("Test", N, functor);
// wait for all three operations to finish
Kokkos::fence();
// do something with a and b
RetroSearch is an open source project built by @garambo | Open a GitHub Issue
Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo
HTML:
3.2
| Encoding:
UTF-8
| Version:
0.7.4