don't create new context on init

Author: SimonDanisch

src/backends/cudanative/cudanative.jl

@@ -40,7 +40,14 @@ global init, all_contexts, current_context
 let contexts = CUContext[]
     all_contexts() = copy(contexts)::Vector{CUContext}
     current_context() = last(contexts)::CUContext
-    function init(;ctx = any_context())
+    function init(;ctx = nothing)
+        ctx = if ctx == nothing
+            if isempty(contexts)
+                any_context()
+            else
+                current_context()
+            end
+        end
         GPUArrays.make_current(ctx)
         push!(contexts, ctx)
         ctx

test/runtests.jl

@@ -18,11 +18,9 @@ macro allbackends(title, backendname::Symbol, block)
                     $(esc(backendname)) = backend
                     $(esc(block))
                 end
-                if backend == :cudanative
-                    println("GPUMem: ", CUDAdrv.Mem.used() / 10^6)
-                    gc()
-                    println("    gc: ", CUDAdrv.Mem.used() / 10^6)
-                end
+                info("GPUMem: ", CUDAdrv.Mem.used() / 10^6)
+                gc()
+                info("    gc: ", CUDAdrv.Mem.used() / 10^6)
             end
         end
     end