Add LMbench pipe test

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

@@ -0,0 +1,5 @@
+{
+    "alert_threshold": "125%",
+    "pattern": "Pipe bandwidth",
+    "field": "3"
+}

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

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+[
+    {
+        "name": "Average pipe bandwidth on Linux",
+        "unit": "MB/s",
+        "value": 0,
+        "extra": "linux_avg"
+    },
+    {
+        "name": "Average pipe bandwidth on Asterinas",
+        "unit": "MB/s",
+        "value": 0,
+        "extra": "aster_avg"
+    }
+]

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

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+#!/bin/sh
+
+# SPDX-License-Identifier: MPL-2.0
+
+set -e
+
+echo "*** Running the LMbench pipe bandwidth test ***"
+
+/benchmark/bin/lmbench/bw_pipe -P 1

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

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+{
+    "alert_threshold": "125%",
+    "pattern": "Pipe latency",
+    "field": "3"
+}

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

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

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

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