tests: using virtio for memcached tests

Signed-off-by: Reto Achermann <achreto@gmail.com>

Author: achreto

kernel/tests/s11_rackscale_benchmarks.rs

@@ -915,7 +915,8 @@ fn rackscale_memcached_benchmark_sharded() {
                 if config.is_local_host {
                     servers.push_str(format!("tcp://localhost:{}", 11211 + i).as_str());
                 } else {
-                    let ip = 10 + i;
+                    // +1 because tap0 is reserved for the controller.
+                    let ip = 10 + i + 1;
                     servers.push_str(format!("tcp://172.31.0.{}:{}", ip, 11211).as_str());
                 }
             } else {
@@ -1039,13 +1040,14 @@ fn rackscale_memcached_benchmark_sharded() {
     let built = BuildArgs::default()
         .module("rkapps")
         .user_feature("rkapps:memcached-bench")
-        // .user_feature("rkapps:virtio")
-        // .user_feature("libvibrio:virtio")
+        .user_feature("rkapps:virtio")
+        .user_feature("libvibrio:virtio")
         .kernel_feature("pages-4k")
         .release()
         .set_rackscale(false)
         .build();
 
+
     fn controller_run_fun(
         config: Option<&MemcachedShardedConfig>,
         timeout_ms: u64,
@@ -1094,15 +1096,25 @@ fn rackscale_memcached_benchmark_sharded() {
         _is_baseline: bool,
         _arg: Option<MemcachedShardedConfig>,
     ) -> Result<()> {
-        proc.exp_regex(r#"\[ INFO\]: bootloader/src/kernel.rs"#)
-            .expect("bootloaader");
+        match proc.exp_regex(r#"\[ INFO\]: bootloader/src/kernel.rs"#) {
+            Ok(_) => (),
+            Err( rexpect::errors::Error(rexpect::errors::ErrorKind::EOF(_expected, s, _), _state)) => {
+                for l in s.lines() {
+                    println!("MEMCACHED-OUTPUT: {}", l);
+                }
+            }
+            Err(e) => {
+                println!("{e:?}");
+                panic!("error")
+            }
+        }
 
         while let Ok(l) = proc.read_line() {
             println!("MEMCACHED-OUTPUT: {}", l);
         }
 
         match proc.exp_regex(r#"dhcp: vioif0: adding IP address (\d+).(\d+).(\d+).(\d+)/(\d+)"#) {
-            Ok((prev, matched)) => {
+            Ok((_prev, matched)) => {
                 println!(" > Networking setup succeeded. {matched}");
             }
             Err(e) => {

kernel/testutils/src/rackscale_runner.rs

@@ -472,7 +472,7 @@ impl<T: Clone + Send + 'static> RackscaleRun<T> {
                     let mut cmdline_client =
                         RunnerArgs::new_with_build(&client_kernel_test, &state.built)
                             .timeout(state.client_timeout)
-                            // .use_virtio()
+                            .use_virtio()
                             .tap(&format!("tap{}", (i + 1) * 2))
                             .no_network_setup()
                             .cores(state.cores_per_client)