Add lmbench localhost UDP latency test

.github/workflows/benchmark_asterinas.yml

@@ -60,6 +60,7 @@ jobs:
           - lmbench-tcp-bandwidth-localhost
           - lmbench-tcp-connect-latency
           - lmbench-tcp-latency-localhost
+          - lmbench-udp-latency-localhost
       fail-fast: false
     timeout-minutes: 60
     container: 

test/benchmark/lmbench-udp-latency-localhost/config.json

@@ -0,0 +1,7 @@
+{
+    "alert_threshold": "125%",
+    "alert_tool": "customSmallerIsBetter",
+    "search_pattern": "UDP latency using 127.0.0.1:",
+    "result_index": "5",
+    "description": "The latency of UDP on localhost."
+}

test/benchmark/lmbench-udp-latency-localhost/result_template.json

@@ -0,0 +1,14 @@
+[
+    {
+        "name": "Average UDP latency on Linux",
+        "unit": "µs",
+        "value": 0,
+        "extra": "linux_avg"
+    },
+    {
+        "name": "Average UDP latency on Asterinas",
+        "unit": "µs",
+        "value": 0,
+        "extra": "aster_avg"
+    }
+]

test/benchmark/lmbench-udp-latency-localhost/run.sh

@@ -0,0 +1,11 @@
+#!/bin/sh
+
+# SPDX-License-Identifier: MPL-2.0
+
+set -e
+
+echo "*** Running lmbench UDP latency test ***"
+
+/benchmark/bin/lmbench/lat_udp -s
+/benchmark/bin/lmbench/lat_udp -P 1 127.0.0.1
+/benchmark/bin/lmbench/lat_udp -S 127.0.0.1