Tests various strategies for subviews

Installation

Clone the git repository adding the --recursive option

Test

One defines a simple kind a CSR storage. The data are stored in a large 1d view (entries) or an hand written array (shared_array) which uses a naive reference counting mechanism.

This test computes the sum of the values of each row using various approaches

• Kokkos/Direct does ne create a view but browse simply the row stored in a
• Kokkos::subView which use Kokkos' provided sub-view mechanisme
• Kokkos::View which builds a Kokkos' view from entries (recommended in Kokkos manual)
• Kokkos|RawView an hand written unsafe view (the pointer may be invalid if the Kokkos::View is destroyed before the view
• SharedArrayView an hand written view for the simple SharedArray (shares the reference counter)
• SharedArray|RawView the same unsafe view used with SharedArray

Compilation

• One requires a C++-17 compiler.
• Binary cannot be built in sources
• Default build type is Release

Use

One must provide an integer parameter which denotes the number of times each test is run. A value of 1000 seems quite reasonnable.