Show memory back-end in versioninfo.

Author: maleadt

lib/cl/state.jl

@@ -162,27 +162,29 @@ abstract type AbstractMemoryBackend end
 struct SVMBackend <: AbstractMemoryBackend end
 struct USMBackend <: AbstractMemoryBackend end
 
-function memory_backend()
-    return get!(task_local_storage(), :CLMemoryBackend) do
-        dev = device()
+function default_memory_backend(dev::Device)
+    # determine if USM is supported
+    usm = if usm_supported(dev)
+        caps = usm_capabilities(dev)
+        caps.host.access && caps.device.access
+    else
+        false
+    end
 
-        # determine if USM is supported
-        usm = if usm_supported(dev)
-            caps = usm_capabilities(dev)
-            caps.host.access && caps.device.access
-        else
-            false
+    # determine if SVM is available (if needed)
+    if !usm
+        caps = svm_capabilities(dev)
+        if !caps.coarse_grain_buffer
+            error("Device $dev does not support USM or coarse-grained SVM, either of which is required by OpenCL.jl")
         end
+    end
 
-        # determine if SVM is available (if needed)
-        if !usm
-            caps = svm_capabilities(dev)
-            if !caps.coarse_grain_buffer
-                error("Device $dev does not support USM or coarse-grained SVM, either of which is required by OpenCL.jl")
-            end
-        end
+    usm ? USMBackend() : SVMBackend()
+end
 
-        usm ? USMBackend() : SVMBackend()
+function memory_backend()
+    return get!(task_local_storage(), :CLMemoryBackend) do
+        default_memory_backend(device())
     end
 end
 

src/util.jl

@@ -64,19 +64,28 @@ function versioninfo(io::IO=stdout)
         for device in cl.devices(platform)
             print(io, "   · $(device.name)")
 
-            ## list some relevant extensions
-            extensions = []
+            # show a list of tags
+            tags = []
+            ## memory back-end
+            backend = cl.default_memory_backend(device)
+            if backend == cl.SVMBackend()
+                push!(tags, "svm")
+            elseif backend == cl.USMBackend()
+                push!(tags, "usm")
+            end
+            ## relevant extensions
             if in("cl_khr_fp16", device.extensions)
-                push!(extensions, "fp16")
+                push!(tags, "fp16")
             end
             if in("cl_khr_fp64", device.extensions)
-                push!(extensions, "fp64")
+                push!(tags, "fp64")
             end
             if in("cl_khr_il_program", device.extensions)
-                push!(extensions, "il")
+                push!(tags, "il")
             end
-            if !isempty(extensions)
-                print(io, " (", join(extensions, ", "), ")")
+            ## render
+            if !isempty(tags)
+                print(io, " (", join(tags, ", "), ")")
             end
             println(io)
         end