Add lmbench mmap latency test

.github/workflows/benchmark_asterinas.yml

@@ -46,6 +46,7 @@ jobs:
           # Mmap-related benchmarks
           - lmbench-pagefault
           - lmbench-mmap-bandwidth
+          - lmbench-mmap-latency
           # Semaphore benchmark
           - lmbench-semaphore
       fail-fast: false

test/benchmark/lmbench-mmap-latency/config.json

@@ -0,0 +1,7 @@
+{
+    "alert_threshold": "125%",
+    "alert_tool": "customSmallerIsBetter",
+    "search_pattern": "268.435456",
+    "result_index": "2",
+    "description": "The latency of mmap on a single processor."
+}

test/benchmark/lmbench-mmap-latency/result_template.json

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

test/benchmark/lmbench-mmap-latency/run.sh

@@ -0,0 +1,10 @@
+#!/bin/sh
+
+# SPDX-License-Identifier: MPL-2.0
+
+set -e
+
+echo "*** Running the LMbench mmap latency test ***"
+
+dd if=/dev/zero of=/ext2/test_file bs=1M count=256
+/benchmark/bin/lmbench/lat_mmap 256m /ext2/test_file