Tidied to now only use CUDA runtime (not mixed with driver calls)

Author: agray3

ggml-cuda.cu

@@ -2418,8 +2418,7 @@ struct ggml_cudaGraph {
     size_t numNodes = 0;
     int softmax_ne0 = 0;
     cudaGraphNode_t nodes[MAX_NODES_IN_CUDA_GRAPH];
-    CUDA_KERNEL_NODE_PARAMS_v2 paramsDriver[MAX_NODES_IN_CUDA_GRAPH];
-    cudaKernelNodeParams paramsRuntime[MAX_NODES_IN_CUDA_GRAPH];
+    cudaKernelNodeParams params[MAX_NODES_IN_CUDA_GRAPH];
 };
 #endif
 
@@ -2523,12 +2522,10 @@ GGML_CALL static enum ggml_status ggml_backend_cuda_graph_compute(ggml_backend_t
 
             // Loop over nodes, and extract kernel parameters fro each node
             for(size_t i=0; i<cudaGraph.numNodes; i++) {
-                CUgraphNodeType nodeType;
-                CU_CHECK(cuGraphNodeGetType(cudaGraph.nodes[i], &nodeType));
-                if (nodeType == CU_GRAPH_NODE_TYPE_KERNEL) {
-                    // We currently get a set of params using both driver and runtime, to work around an issue (see below)
-                    CU_CHECK(cuGraphKernelNodeGetParams(cudaGraph.nodes[i], &cudaGraph.paramsDriver[i])); // Get params using driver
-                    auto statRT = cudaGraphKernelNodeGetParams(cudaGraph.nodes[i], &cudaGraph.paramsRuntime[i]); // Get params using runtime
+                cudaGraphNodeType nodeType;
+                CUDA_CHECK(cudaGraphNodeGetType(cudaGraph.nodes[i], &nodeType));
+                if (nodeType == cudaGraphNodeTypeKernel) {
+                    auto statRT = cudaGraphKernelNodeGetParams(cudaGraph.nodes[i], &cudaGraph.params[i]); // Get params using runtime
                     if(statRT == cudaErrorInvalidDeviceFunction) {
                         // Fails due to incorrect handling by CUDA runtime of CUDA BLAS node.
                         // We don't need to update blas nodes, so clear error and move on.
@@ -2539,16 +2536,13 @@ GGML_CALL static enum ggml_status ggml_backend_cuda_graph_compute(ggml_backend_t
         }
 
         // Update copy kernel param (required every token)
-        // Currently uses runtime copy of params to identify copy function node,
-        // and driver copy of params to perform the update
-        // TO DO work out how to do it only using runtime copy.
         if(!cudaGraphUpdateRequired) { // on update steps, the live parameters will already be captured
             int k=0;
             for(size_t i=0; i<cudaGraph.numNodes; i++) {
-                if(cudaGraph.paramsRuntime[i].func == ggmlCudaCpyFn) {
+                if(cudaGraph.params[i].func == ggmlCudaCpyFn) {
                     char** updatedKernelArgPointer = updatedKernelArg[k++];
-                    cudaGraph.paramsDriver[i].kernelParams[1] = updatedKernelArgPointer;
-                    CU_CHECK(cuGraphKernelNodeSetParams(cudaGraph.nodes[i], &cudaGraph.paramsDriver[i]));
+                    cudaGraph.params[i].kernelParams[1] = updatedKernelArgPointer;
+                    CUDA_CHECK(cudaGraphKernelNodeSetParams(cudaGraph.nodes[i], &cudaGraph.params[i]));
                 }
             }
         }