add initial CUDA pipeline

Author: vchuravy

.buildkite/pipeline.yml

@@ -1,3 +1,5 @@
+env:
+
 steps:
   - label: "CUDA Julia {{matrix.version}}"
     matrix:
@@ -7,12 +9,13 @@ steps:
     plugins:
       - JuliaCI/julia#v1:
           version: "{{matrix.version}}"
-    command: |
-      true
+      - JuliaCI/julia-test#v1: ~
+    env:
+      TRIXI_TEST: "CUDA"
     agents:
       queue: "juliagpu"
       cuda: "*"
     if: build.message !~ /\[skip ci\]/
     timeout_in_minutes: 60
     soft_fail:
-      - exit_status: 3
+      - exit_status: 3

test/Project.toml

@@ -4,6 +4,7 @@ Adapt = "79e6a3ab-5dfb-504d-930d-738a2a938a0e"
 Aqua = "4c88cf16-eb10-579e-8560-4a9242c79595"
 CairoMakie = "13f3f980-e62b-5c42-98c6-ff1f3baf88f0"
 Convex = "f65535da-76fb-5f13-bab9-19810c17039a"
+CUDA = "052768ef-5323-5732-b1bb-66c8b64840ba"
 DelimitedFiles = "8bb1440f-4735-579b-a4ab-409b98df4dab"
 DoubleFloats = "497a8b3b-efae-58df-a0af-a86822472b78"
 Downloads = "f43a241f-c20a-4ad4-852c-f6b1247861c6"

test/runtests.jl

@@ -116,4 +116,13 @@ const TRIXI_NTHREADS = clamp(Sys.CPU_THREADS, 2, 3)
     @time if TRIXI_TEST == "all" || TRIXI_TEST == "paper_self_gravitating_gas_dynamics"
         include("test_paper_self_gravitating_gas_dynamics.jl")
     end
+
+    @time if TRIXI_TEST == "all" || TRIXI_TEST == "CUDA"
+        import CUDA
+        if CUDA.functional()
+            include("test_cuda.jl")
+        else
+            @warn "Unable to run CUDA tests on this machine"
+        end
+    end
 end

test/test_cuda.jl

@@ -0,0 +1,20 @@
+module TestCUDA
+
+using CUDA
+using Test
+using Trixi
+
+include("test_trixi.jl")
+
+# EXAMPLES_DIR = joinpath(examples_dir(), "dgmulti_1d")
+
+# Start with a clean environment: remove Trixi.jl output directory if it exists
+outdir = "out"
+isdir(outdir) && rm(outdir, recursive = true)
+
+# TODO:
+
+# Clean up afterwards: delete Trixi.jl output directory
+@test_nowarn isdir(outdir) && rm(outdir, recursive = true)
+
+end # module