Add unix bandwidth test

test/benchmark/lmbench-unix-bandwidth/config.json

@@ -0,0 +1,7 @@
+{
+    "alert_threshold": "125%",
+    "alert_tool": "customBiggerIsBetter",
+    "search_pattern": "sock stream bandwidth",
+    "result_index": "5",
+    "description": "The bandwidth of UNIX domain socket communication on a single processor."
+}

test/benchmark/lmbench-unix-bandwidth/result_template.json

@@ -0,0 +1,14 @@
+[
+    {
+        "name": "Average unix bandwidth on Linux",
+        "unit": "MB/s",
+        "value": 0,
+        "extra": "linux_avg"
+    },
+    {
+        "name": "Average unix bandwidth on Asterinas",
+        "unit": "MB/s",
+        "value": 0,
+        "extra": "aster_avg"
+    }
+]

test/benchmark/lmbench-unix-bandwidth/run.sh

@@ -0,0 +1,9 @@
+#!/bin/sh
+
+# SPDX-License-Identifier: MPL-2.0
+
+set -e
+
+echo "*** Running the LMbench unix bandwidth test ***"
+
+/benchmark/bin/lmbench/bw_unix -P 1