llama : run all KQV ops on the CPU with no KV offload (llama/5049)

ggml-backend.c

@@ -1191,6 +1191,24 @@ static void sched_split_graph(ggml_backend_sched_t sched, struct ggml_cgraph * g
                 ggml_tallocr_t src_allocr = node_allocr(src);
                 GGML_ASSERT(src_allocr != NULL); // all inputs should be assigned by now
                 if (src_allocr != node_allocr) {
+                    // create a copy of the input in the split's backend
+                    size_t id = hash_id(src);
+                    if (sched->node_copies[id][cur_backend_id] == NULL) {
+                        ggml_backend_t backend = get_allocr_backend(sched, cur_allocr);
+                        struct ggml_tensor * tensor_copy = ggml_dup_tensor_layout(sched->ctx, src);
+                        ggml_format_name(tensor_copy, "%s#%s", ggml_backend_name(backend), src->name);
+
+                        sched->node_copies[id][cur_backend_id] = tensor_copy;
+                        node_allocr(tensor_copy) = cur_allocr;
+                        SET_CAUSE(tensor_copy, "4.cpy");
+
+                        int n_inputs = sched->splits[cur_split].n_inputs++;
+                        GGML_ASSERT(n_inputs < GGML_MAX_SPLIT_INPUTS);
+                        sched->splits[cur_split].inputs[n_inputs] = src;
+                    }
+                    node->src[j] = sched->node_copies[id][cur_backend_id];
+
+#if 0
                     // check if the input is already in the split
                     bool found = false;
                     for (int k = 0; k < sched->splits[cur_split].n_inputs; k++) {
@@ -1206,19 +1224,7 @@ static void sched_split_graph(ggml_backend_sched_t sched, struct ggml_cgraph * g
                         GGML_ASSERT(n_inputs < GGML_MAX_SPLIT_INPUTS);
                         sched->splits[cur_split].inputs[n_inputs] = src;
                     }
-
-                    // create a copy of the input in the split's backend
-                    size_t id = hash_id(src);
-                    if (sched->node_copies[id][cur_backend_id] == NULL) {
-                        ggml_backend_t backend = get_allocr_backend(sched, cur_allocr);
-                        struct ggml_tensor * tensor_copy = ggml_dup_tensor_layout(sched->ctx, src);
-                        ggml_format_name(tensor_copy, "%s#%s", ggml_backend_name(backend), src->name);
-
-                        sched->node_copies[id][cur_backend_id] = tensor_copy;
-                        node_allocr(tensor_copy) = cur_allocr;
-                        SET_CAUSE(tensor_copy, "4.cpy");
-                    }
-                    node->src[j] = sched->node_copies[id][cur_backend_id];
+#endif
                 }
             }
         }
@@ -1333,7 +1339,7 @@ static void sched_compute_splits(ggml_backend_sched_t sched) {
         uint64_t compute_start_us = ggml_time_us();
         if (!sched->callback_eval) {
             ggml_backend_graph_compute(split_backend, &split->graph);
-          //ggml_backend_synchronize(split_backend); // necessary to measure compute time
+            //ggml_backend_synchronize(split_backend); // necessary to measure compute time
         } else {
             // similar to ggml_backend_compare_graph_backend
             for (int j0 = 0; j0 < split->graph.n_nodes; j0++) {