Added Benchmarking tools (#413)

Added files for the smaller workload benchmarks

Added benchmark examples

Started implementing benchmarking functions

1 files changed, 98 insertions, 0 deletions

diff --git a/opendc-experiments/opendc-experiments-base/src/jmh/kotlin/org/opendc/experiments/TaskScalingBenchmark.kt b/opendc-experiments/opendc-experiments-base/src/jmh/kotlin/org/opendc/experiments/TaskScalingBenchmark.kt
new file mode 100644
index 00000000..4cacd09c
--- /dev/null
+++ b/opendc-experiments/opendc-experiments-base/src/jmh/kotlin/org/opendc/experiments/TaskScalingBenchmark.kt
@@ -0,0 +1,98 @@
+/*
+ * Copyright (c) 2026 AtLarge Research
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package org.opendc.experiments
+
+import org.opendc.experiments.base.runner.ExperimentCommand
+import org.openjdk.jmh.annotations.Benchmark
+import org.openjdk.jmh.annotations.BenchmarkMode
+import org.openjdk.jmh.annotations.Fork
+import org.openjdk.jmh.annotations.Measurement
+import org.openjdk.jmh.annotations.Mode
+import org.openjdk.jmh.annotations.OutputTimeUnit
+import org.openjdk.jmh.annotations.Scope
+import org.openjdk.jmh.annotations.State
+import org.openjdk.jmh.annotations.Warmup
+import java.io.File
+import java.util.concurrent.TimeUnit
+
+/**
+ * JMH benchmark that measures simulation performance as the number of scheduled
+ * tasks scales from 100 to 5 000 000. All tasks have a single fragment.
+ *
+ * Each benchmark method runs a full simulation with an increasing task count while
+ * keeping all other variables fixed:
+ * - **Topology**: 100-host cluster (`topologies/taskScaling/topology_100.json`)
+ * - **Allocation policy**: memory-based (`Mem`)
+ * - **Export interval**: set to 999999 to make the simulator export only at the end of the simulation,
+ *
+ * JFR profiling and heap statistics collection are provided by [OpenDCBenchmark].
+ */
+@State(Scope.Thread)
+@Fork(1)
+@Warmup(iterations = 1, batchSize = 1)
+@Measurement(iterations = 5, batchSize = 1)
+@BenchmarkMode(Mode.SingleShotTime)
+@OutputTimeUnit(TimeUnit.MILLISECONDS)
+open class TaskScalingBenchmark : OpenDCBenchmark() {
+    /** Runs the simulation with a workload of 100 tasks. */
+    @Benchmark
+    fun taskScalingBenchmark100() {
+        ExperimentCommand().main(arrayOf("--experiment-path", "src/jmh/resources/experiments/taskScaling/experiment_100.json"))
+        File("output").deleteRecursively()
+    }
+
+    /** Runs the simulation with a workload of 1 000 tasks. */
+    @Benchmark
+    fun taskScalingBenchmark1K() {
+        ExperimentCommand().main(arrayOf("--experiment-path", "src/jmh/resources/experiments/taskScaling/experiment_1K.json"))
+        File("output").deleteRecursively()
+    }
+
+    /** Runs the simulation with a workload of 10 000 tasks. */
+    @Benchmark
+    fun taskScalingBenchmark10K() {
+        ExperimentCommand().main(arrayOf("--experiment-path", "src/jmh/resources/experiments/taskScaling/experiment_10K.json"))
+        File("output").deleteRecursively()
+    }
+
+    /** Runs the simulation with a workload of 100 000 tasks. */
+    @Benchmark
+    fun taskScalingBenchmark100K() {
+        ExperimentCommand().main(arrayOf("--experiment-path", "src/jmh/resources/experiments/taskScaling/experiment_100K.json"))
+        File("output").deleteRecursively()
+    }
+
+    /** Runs the simulation with a workload of 1 000 000 tasks. */
+    @Benchmark
+    fun taskScalingBenchmark1M() {
+        ExperimentCommand().main(arrayOf("--experiment-path", "src/jmh/resources/experiments/taskScaling/experiment_1M.json"))
+        File("output").deleteRecursively()
+    }
+
+    /** Runs the simulation with a workload of 2 500 000 tasks. */
+    @Benchmark
+    fun taskScalingBenchmark2M500K() {
+        ExperimentCommand().main(arrayOf("--experiment-path", "src/jmh/resources/experiments/taskScaling/experiment_2_5M.json"))
+        File("output").deleteRecursively()
+    }
+}