exp: Add experiment for OpenDC Energy project

This pull requests adds an experiment to the repository for the OpenDC Energy project. 
This experiment currently runs the Solvinity traces and tests how different energy 
models perform.

* Add new experiment `opendc-experiments-energy21`
* Link experiment to `ConsoleRunner` so that the experiment can be run from the 
   command line.
* `BatchRecorder` is now used to emit all metrics at once after the hypervisor 
    finishes a slice. 

5 files changed, 44 insertions, 144 deletions

diff --git a/simulator/opendc-experiments/opendc-experiments-capelin/src/main/kotlin/org/opendc/experiments/capelin/monitor/ExperimentMetricExporter.kt b/simulator/opendc-experiments/opendc-experiments-capelin/src/main/kotlin/org/opendc/experiments/capelin/monitor/ExperimentMetricExporter.kt
index 799de60f..5f8002e2 100644
--- a/simulator/opendc-experiments/opendc-experiments-capelin/src/main/kotlin/org/opendc/experiments/capelin/monitor/ExperimentMetricExporter.kt
+++ b/simulator/opendc-experiments/opendc-experiments-capelin/src/main/kotlin/org/opendc/experiments/capelin/monitor/ExperimentMetricExporter.kt
@@ -89,11 +89,10 @@ public class ExperimentMetricExporter(
                 hostMetric.interferedBurst,
                 hostMetric.cpuUsage,
                 hostMetric.cpuDemand,
+                hostMetric.powerDraw,
                 hostMetric.numberOfDeployedImages,
                 host
             )
-
-            monitor.reportPowerConsumption(host, hostMetric.powerDraw)
         }
     }
 
@@ -104,19 +103,9 @@ public class ExperimentMetricExporter(
             val hostMetric = hostMetrics[uid]
 
             if (hostMetric != null) {
-                block(hostMetric, point.sum)
-            }
-        }
-    }
-
-    private fun mapDoubleSum(data: MetricData?, hostMetrics: MutableMap<String, HostMetrics>, block: (HostMetrics, Double) -> Unit) {
-        val points = data?.doubleSumData?.points ?: emptyList()
-        for (point in points) {
-            val uid = point.labels["host"]
-            val hostMetric = hostMetrics[uid]
-
-            if (hostMetric != null) {
-                block(hostMetric, point.value)
+                // Take the average of the summary
+                val avg = (point.percentileValues[0].value + point.percentileValues[1].value) / 2
+                block(hostMetric, avg)
             }
         }
     }
diff --git a/simulator/opendc-experiments/opendc-experiments-capelin/src/main/kotlin/org/opendc/experiments/capelin/monitor/ExperimentMonitor.kt b/simulator/opendc-experiments/opendc-experiments-capelin/src/main/kotlin/org/opendc/experiments/capelin/monitor/ExperimentMonitor.kt
index 5e75c890..68631dee 100644
--- a/simulator/opendc-experiments/opendc-experiments-capelin/src/main/kotlin/org/opendc/experiments/capelin/monitor/ExperimentMonitor.kt
+++ b/simulator/opendc-experiments/opendc-experiments-capelin/src/main/kotlin/org/opendc/experiments/capelin/monitor/ExperimentMonitor.kt
@@ -42,11 +42,6 @@ public interface ExperimentMonitor : AutoCloseable {
     public fun reportHostStateChange(time: Long, host: Host, newState: HostState) {}
 
     /**
-     * Report the power consumption of a host.
-     */
-    public fun reportPowerConsumption(host: Host, draw: Double) {}
-
-    /**
      * This method is invoked for a host for each slice that is finishes.
      */
     public fun reportHostSlice(
@@ -57,9 +52,9 @@ public interface ExperimentMonitor : AutoCloseable {
         interferedBurst: Long,
         cpuUsage: Double,
         cpuDemand: Double,
+        powerDraw: Double,
         numberOfDeployedImages: Int,
-        host: Host,
-        duration: Long = 5 * 60 * 1000L
+        host: Host
     ) {
     }
 
diff --git a/simulator/opendc-experiments/opendc-experiments-capelin/src/main/kotlin/org/opendc/experiments/capelin/monitor/ParquetExperimentMonitor.kt b/simulator/opendc-experiments/opendc-experiments-capelin/src/main/kotlin/org/opendc/experiments/capelin/monitor/ParquetExperimentMonitor.kt
index 0e675d87..983b4cff 100644
--- a/simulator/opendc-experiments/opendc-experiments-capelin/src/main/kotlin/org/opendc/experiments/capelin/monitor/ParquetExperimentMonitor.kt
+++ b/simulator/opendc-experiments/opendc-experiments-capelin/src/main/kotlin/org/opendc/experiments/capelin/monitor/ParquetExperimentMonitor.kt
@@ -50,52 +50,11 @@ public class ParquetExperimentMonitor(base: File, partition: String, bufferSize:
         File(base, "provisioner-metrics/$partition/data.parquet"),
         bufferSize
     )
-    private val currentHostEvent = mutableMapOf<Host, HostEvent>()
-    private var startTime = -1L
 
-    override fun reportVmStateChange(time: Long, server: Server, newState: ServerState) {
-        if (startTime < 0) {
-            startTime = time
-
-            // Update timestamp of initial event
-            currentHostEvent.replaceAll { _, v -> v.copy(timestamp = startTime) }
-        }
-    }
+    override fun reportVmStateChange(time: Long, server: Server, newState: ServerState) {}
 
     override fun reportHostStateChange(time: Long, host: Host, newState: HostState) {
         logger.debug { "Host ${host.uid} changed state $newState [$time]" }
-
-        val previousEvent = currentHostEvent[host]
-
-        val roundedTime = previousEvent?.let {
-            val duration = time - it.timestamp
-            val k = 5 * 60 * 1000L // 5 min in ms
-            val rem = duration % k
-
-            if (rem == 0L) {
-                time
-            } else {
-                it.timestamp + duration + k - rem
-            }
-        } ?: time
-
-        reportHostSlice(
-            roundedTime,
-            0,
-            0,
-            0,
-            0,
-            0.0,
-            0.0,
-            0,
-            host
-        )
-    }
-
-    private val lastPowerConsumption = mutableMapOf<Host, Double>()
-
-    override fun reportPowerConsumption(host: Host, draw: Double) {
-        lastPowerConsumption[host] = draw
     }
 
     override fun reportHostSlice(
@@ -106,69 +65,26 @@ public class ParquetExperimentMonitor(base: File, partition: String, bufferSize:
         interferedBurst: Long,
         cpuUsage: Double,
         cpuDemand: Double,
+        powerDraw: Double,
         numberOfDeployedImages: Int,
-        host: Host,
-        duration: Long
+        host: Host
     ) {
-        val previousEvent = currentHostEvent[host]
-        when {
-            previousEvent == null -> {
-                val event = HostEvent(
-                    time,
-                    5 * 60 * 1000L,
-                    host,
-                    numberOfDeployedImages,
-                    requestedBurst,
-                    grantedBurst,
-                    overcommissionedBurst,
-                    interferedBurst,
-                    cpuUsage,
-                    cpuDemand,
-                    lastPowerConsumption[host] ?: 200.0,
-                    host.model.cpuCount
-                )
-
-                currentHostEvent[host] = event
-            }
-            previousEvent.timestamp == time -> {
-                val event = HostEvent(
-                    time,
-                    previousEvent.duration,
-                    host,
-                    numberOfDeployedImages,
-                    requestedBurst,
-                    grantedBurst,
-                    overcommissionedBurst,
-                    interferedBurst,
-                    cpuUsage,
-                    cpuDemand,
-                    lastPowerConsumption[host] ?: 200.0,
-                    host.model.cpuCount
-                )
-
-                currentHostEvent[host] = event
-            }
-            else -> {
-                hostWriter.write(previousEvent)
-
-                val event = HostEvent(
-                    time,
-                    time - previousEvent.timestamp,
-                    host,
-                    numberOfDeployedImages,
-                    requestedBurst,
-                    grantedBurst,
-                    overcommissionedBurst,
-                    interferedBurst,
-                    cpuUsage,
-                    cpuDemand,
-                    lastPowerConsumption[host] ?: 200.0,
-                    host.model.cpuCount
-                )
-
-                currentHostEvent[host] = event
-            }
-        }
+        hostWriter.write(
+            HostEvent(
+                time,
+                5 * 60 * 1000L,
+                host,
+                numberOfDeployedImages,
+                requestedBurst,
+                grantedBurst,
+                overcommissionedBurst,
+                interferedBurst,
+                cpuUsage,
+                cpuDemand,
+                powerDraw,
+                host.model.cpuCount
+            )
+        )
     }
 
     override fun reportProvisionerMetrics(
@@ -196,12 +112,6 @@ public class ParquetExperimentMonitor(base: File, partition: String, bufferSize:
     }
 
     override fun close() {
-        // Flush remaining events
-        for ((_, event) in currentHostEvent) {
-            hostWriter.write(event)
-        }
-        currentHostEvent.clear()
-
         hostWriter.close()
         provisionerWriter.close()
     }
diff --git a/simulator/opendc-experiments/opendc-experiments-capelin/src/main/kotlin/org/opendc/experiments/capelin/telemetry/parquet/ParquetHostEventWriter.kt b/simulator/opendc-experiments/opendc-experiments-capelin/src/main/kotlin/org/opendc/experiments/capelin/telemetry/parquet/ParquetHostEventWriter.kt
index 4a3e7963..c8fe1cb2 100644
--- a/simulator/opendc-experiments/opendc-experiments-capelin/src/main/kotlin/org/opendc/experiments/capelin/telemetry/parquet/ParquetHostEventWriter.kt
+++ b/simulator/opendc-experiments/opendc-experiments-capelin/src/main/kotlin/org/opendc/experiments/capelin/telemetry/parquet/ParquetHostEventWriter.kt
@@ -52,7 +52,7 @@ public class ParquetHostEventWriter(path: File, bufferSize: Int) :
             record.put("interfered_burst", event.interferedBurst)
             record.put("cpu_usage", event.cpuUsage)
             record.put("cpu_demand", event.cpuDemand)
-            record.put("power_draw", event.powerDraw * (1.0 / 12))
+            record.put("power_draw", event.powerDraw)
             record.put("cores", event.cores)
         }
 
diff --git a/simulator/opendc-experiments/opendc-experiments-capelin/src/main/kotlin/org/opendc/experiments/capelin/trace/Sc20StreamingParquetTraceReader.kt b/simulator/opendc-experiments/opendc-experiments-capelin/src/main/kotlin/org/opendc/experiments/capelin/trace/Sc20StreamingParquetTraceReader.kt
index 9ab69572..c5294b55 100644
--- a/simulator/opendc-experiments/opendc-experiments-capelin/src/main/kotlin/org/opendc/experiments/capelin/trace/Sc20StreamingParquetTraceReader.kt
+++ b/simulator/opendc-experiments/opendc-experiments-capelin/src/main/kotlin/org/opendc/experiments/capelin/trace/Sc20StreamingParquetTraceReader.kt
@@ -57,8 +57,8 @@ private val logger = KotlinLogging.logger {}
 @OptIn(ExperimentalStdlibApi::class)
 public class Sc20StreamingParquetTraceReader(
     traceFile: File,
-    performanceInterferenceModel: PerformanceInterferenceModel,
-    selectedVms: List<String>,
+    performanceInterferenceModel: PerformanceInterferenceModel? = null,
+    selectedVms: List<String> = emptyList(),
     random: Random
 ) : TraceReader<SimWorkload> {
     /**
@@ -229,20 +229,26 @@ public class Sc20StreamingParquetTraceReader(
                     buffers.remove(id)
                 }
                 val relevantPerformanceInterferenceModelItems =
-                    PerformanceInterferenceModel(
-                        performanceInterferenceModel.items.filter { it.workloadNames.contains(id) }.toSortedSet(),
-                        Random(random.nextInt())
-                    )
+                    if (performanceInterferenceModel != null)
+                        PerformanceInterferenceModel(
+                            performanceInterferenceModel.items.filter { it.workloadNames.contains(id) }.toSortedSet(),
+                            Random(random.nextInt())
+                        )
+                    else
+                        null
                 val workload = SimTraceWorkload(fragments)
+                val meta = mapOf(
+                    "cores" to maxCores,
+                    "required-memory" to requiredMemory,
+                    "workload" to workload
+                )
 
                 TraceEntry(
                     uid, id, submissionTime, workload,
-                    mapOf(
-                        IMAGE_PERF_INTERFERENCE_MODEL to relevantPerformanceInterferenceModelItems,
-                        "cores" to maxCores,
-                        "required-memory" to requiredMemory,
-                        "workload" to workload
-                    )
+                    if (performanceInterferenceModel != null)
+                        meta + mapOf(IMAGE_PERF_INTERFERENCE_MODEL to relevantPerformanceInterferenceModelItems as Any)
+                    else
+                        meta
                 )
             }
             .sortedBy { it.start }