debug cuda

src/main/java/com/elphel/imagej/gpu/GPUTileProcessor.java

@@ -48,6 +48,9 @@ import static jcuda.nvrtc.JNvrtc.nvrtcCreateProgram;
 import static jcuda.nvrtc.JNvrtc.nvrtcDestroyProgram;
 import static jcuda.nvrtc.JNvrtc.nvrtcGetPTX;
 import static jcuda.nvrtc.JNvrtc.nvrtcGetProgramLog;
+import static jcuda.nvrtc.JNvrtc.nvrtcVersion;
+import static jcuda.nvrtc.JNvrtc.nvrtcGetNumSupportedArchs;
+import static jcuda.nvrtc.JNvrtc.nvrtcGetSupportedArchs;
 
 import java.io.File;
 import java.io.IOException;
@@ -506,8 +509,35 @@ public class GPUTileProcessor {
     		// Use the NVRTC to create a program by compiling the source code
     		nvrtcProgram program = new nvrtcProgram();
     		nvrtcCreateProgram(	program, sourceCode, null, 0, null, null);
+    		int nvrtc_rslt = -1;
+    		/*
+    		nvrtc_rslt= nvrtcVersion(nvrtc_version[0],nvrtc_version[0]);
+    		System.out.println("nvrtcVersion="+nvrtc_version[0][0]+"."+nvrtc_version[1][0]+" (returned "+nvrtc_rslt+").");
+    		*/
+    		int [] nvrtc_num_arch = new int[1]; 
+    		nvrtc_rslt= nvrtcGetNumSupportedArchs(nvrtc_num_arch);
+    		System.out.println("nvrtc_num_arch="+nvrtc_num_arch[0]+" (returned "+nvrtc_rslt+").");
+    		int [] nvrtc_archs = new int[nvrtc_num_arch[0]];
+    		nvrtc_rslt= nvrtcGetSupportedArchs(nvrtc_archs);
+    		int max_arch = 0;
+    		for (int sa: nvrtc_archs) {
+    			max_arch = Math.max(max_arch, sa);
+    		}
+    		for (int sa: nvrtc_archs) {
+    			System.out.println("Supported arch "+sa);
+    		}
+			System.out.println("Max supported arch is "+max_arch+", gpu capability = "+capability);
+			if (capability > max_arch) {
+				capability = max_arch;
+				System.out.println("Reduced capability to match NVRTC compiler to "+capability);
+			}
+    		System.out.println();
     		String options[] = {"--gpu-architecture=compute_"+capability,"--extensible-whole-program"};
-
+    		System.out.println("Running NVRTC with the following options:");
+    		for (String s:options) {
+    			System.out.println(s);
+    		}
+    		System.out.println();
     		try {
     			nvrtcCompileProgram(program, options.length, options);
     			OK = true;