llama-bench : fix RPC indication (#7936)

Show "<backend_name>+RPC" when RPC offloading is used

examples/llama-bench/llama-bench.cpp

@@ -714,7 +714,6 @@ struct test {
     static const bool kompute;
     static const bool metal;
     static const bool sycl;
-    static const bool rpc;
     static const bool gpu_blas;
     static const bool blas;
     static const std::string cpu_info;
@@ -726,6 +725,7 @@ struct test {
     int n_batch;
     int n_ubatch;
     int n_threads;
+    bool has_rpc;
     ggml_type type_k;
     ggml_type type_v;
     int n_gpu_layers;
@@ -751,6 +751,7 @@ struct test {
         n_batch = inst.n_batch;
         n_ubatch = inst.n_ubatch;
         n_threads = inst.n_threads;
+        has_rpc = !inst.rpc_servers.empty();
         type_k = inst.type_k;
         type_v = inst.type_v;
         n_gpu_layers = inst.n_gpu_layers;
@@ -810,9 +811,6 @@ struct test {
         if (sycl) {
             return GGML_SYCL_NAME;
         }
-        if (rpc) {
-            return "RPC";
-        }
         if (gpu_blas) {
             return "GPU BLAS";
         }
@@ -882,7 +880,7 @@ struct test {
         std::vector<std::string> values = {
             build_commit, std::to_string(build_number),
             std::to_string(cuda), std::to_string(vulkan), std::to_string(vulkan),
-            std::to_string(metal), std::to_string(sycl), std::to_string(rpc), std::to_string(gpu_blas), std::to_string(blas),
+            std::to_string(metal), std::to_string(sycl), std::to_string(has_rpc), std::to_string(gpu_blas), std::to_string(blas),
             cpu_info, gpu_info,
             model_filename, model_type, std::to_string(model_size), std::to_string(model_n_params),
             std::to_string(n_batch), std::to_string(n_ubatch),
@@ -916,7 +914,6 @@ const bool        test::metal        = !!ggml_cpu_has_metal();
 const bool        test::gpu_blas     = !!ggml_cpu_has_gpublas();
 const bool        test::blas         = !!ggml_cpu_has_blas();
 const bool        test::sycl         = !!ggml_cpu_has_sycl();
-const bool        test::rpc          = !!ggml_cpu_has_rpc();
 const std::string test::cpu_info     = get_cpu_info();
 const std::string test::gpu_info     = get_gpu_info();
 
@@ -1182,6 +1179,9 @@ struct markdown_printer : public printer {
                 value = buf;
             } else if (field == "backend") {
                 value = test::get_backend();
+                if (t.has_rpc) {
+                    value += "+RPC";
+                }
             } else if (field == "test") {
                 if (t.n_prompt > 0 && t.n_gen == 0) {
                     snprintf(buf, sizeof(buf), "pp%d", t.n_prompt);