added embodied carbon (#303)

Author: DanteNiewenhuis

opendc-compute/opendc-compute-simulator/src/main/kotlin/org/opendc/compute/simulator/provisioner/HostsProvisioningStep.kt

@@ -91,6 +91,8 @@ public class HostsProvisioningStep internal constructor(
                         cluster.battery!!.initialCharge,
                         cluster.battery!!.name,
                         cluster.name,
+                        cluster.battery!!.embodiedCarbon,
+                        cluster.battery!!.expectedLifetime,
                     )
                 graph.addEdge(battery, batteryDistributor)
 

opendc-compute/opendc-compute-simulator/src/main/kotlin/org/opendc/compute/simulator/telemetry/parquet/DfltBatteryExportColumns.kt

@@ -83,6 +83,11 @@ public object DfltBatteryExportColumns {
             field = Types.required(FLOAT).named("energy_usage"),
         ) { it.energyUsage }
 
+    public val EMBODIED_CARBON: ExportColumn<BatteryTableReader> =
+        ExportColumn(
+            field = Types.required(FLOAT).named("embodied_carbon_emission"),
+        ) { it.embodiedCarbonEmission }
+
     public val CHARGE: ExportColumn<BatteryTableReader> =
         ExportColumn(
             field = Types.required(FLOAT).named("charge"),

opendc-compute/opendc-compute-simulator/src/main/kotlin/org/opendc/compute/simulator/telemetry/table/battery/BatteryTableReader.kt

@@ -50,11 +50,6 @@ public interface BatteryTableReader : Exportable {
      */
     public val timestampAbsolute: Instant
 
-    /**
-     * The number of connected hosts
-     */
-    public val hostsConnected: Int
-
     /**
      * The current power draw of the host in W.
      */
@@ -65,9 +60,23 @@ public interface BatteryTableReader : Exportable {
      */
     public val energyUsage: Double
 
+    /**
+     * The embodied carbon cost of the Battery in kg
+     */
+    public val embodiedCarbonEmission: Double
+
+    /**
+     * The current state of the battery
+     */
     public val batteryState: BatteryState
 
+    /**
+     * The current charge of the battery in J
+     */
     public val charge: Double
 
+    /**
+     * The capacity of the battery in J
+     */
     public val capacity: Double
 }

opendc-compute/opendc-compute-simulator/src/main/kotlin/org/opendc/compute/simulator/telemetry/table/battery/BatteryTableReaderImpl.kt

@@ -48,9 +48,9 @@ public class BatteryTableReaderImpl(
         _timestamp = table.timestamp
         _timestampAbsolute = table.timestampAbsolute
 
-        _hostsConnected = table.hostsConnected
         _powerDraw = table.powerDraw
         _energyUsage = table.energyUsage
+        _embodiedCarbonEmission = table.embodiedCarbonEmission
         _charge = table.charge
         _capacity = table.capacity
         _batteryState = table.batteryState
@@ -72,10 +72,6 @@ public class BatteryTableReaderImpl(
     override val timestampAbsolute: Instant
         get() = _timestampAbsolute
 
-    override val hostsConnected: Int
-        get() = _hostsConnected
-    private var _hostsConnected: Int = 0
-
     override val powerDraw: Double
         get() = _powerDraw
     private var _powerDraw = 0.0
@@ -85,6 +81,11 @@ public class BatteryTableReaderImpl(
     private var _energyUsage = 0.0
     private var previousEnergyUsage = 0.0
 
+    override val embodiedCarbonEmission: Double
+        get() = _embodiedCarbonEmission - previousEmbodiedCarbonEmission
+    private var _embodiedCarbonEmission = 0.0
+    private var previousEmbodiedCarbonEmission = 0.0
+
     override val charge: Double
         get() = _charge
     private var _charge = 0.0
@@ -104,11 +105,10 @@ public class BatteryTableReaderImpl(
         _timestamp = now
         _timestampAbsolute = now + startTime
 
-        _hostsConnected = 0
-
         battery.updateCounters()
         _powerDraw = battery.outgoingSupply
         _energyUsage = battery.totalEnergyUsage
+        _embodiedCarbonEmission = battery.embodiedCarbonEmission
 
         _charge = battery.charge
         _capacity = battery.capacity
@@ -120,10 +120,11 @@ public class BatteryTableReaderImpl(
      */
     override fun reset() {
         previousEnergyUsage = _energyUsage
+        previousEmbodiedCarbonEmission = _embodiedCarbonEmission
 
-        _hostsConnected = 0
         _powerDraw = 0.0
         _energyUsage = 0.0
+        _embodiedCarbonEmission = 0.0
         _charge = 0.0
         _capacity = 0.0
         _batteryState = BatteryState.IDLE

opendc-compute/opendc-compute-topology/src/main/kotlin/org/opendc/compute/topology/TopologyFactories.kt

@@ -143,6 +143,8 @@ private fun ClusterJSONSpec.toClusterSpec(): ClusterSpec {
                 this.battery.chargingSpeed,
                 this.battery.batteryPolicy,
                 this.battery.initialCharge,
+                this.battery.embodiedCarbon,
+                this.battery.expectedLifetime,
             )
     }
 

opendc-compute/opendc-compute-topology/src/main/kotlin/org/opendc/compute/topology/specs/BatterySpec.kt

@@ -28,4 +28,6 @@ public data class BatterySpec(
     val chargingSpeed: Double,
     val batteryPolicy: BatteryPolicyJSONSpec,
     val initialCharge: Double,
+    val embodiedCarbon: Double,
+    val expectedLifetime: Double,
 )

opendc-compute/opendc-compute-topology/src/main/kotlin/org/opendc/compute/topology/specs/TopologySpecs.kt

@@ -166,6 +166,9 @@ public data class PowerSourceJSONSpec(
  * @property chargingSpeed The charging speed of the battery in J
  * @property batteryPolicy The policy used to decide when the battery charges and discharges
  * @property initialCharge The initial charge in the battery
+ * @property embodiedCarbon The embodied carbon needed to create the battery in gram
+ * @property expectedLifetime The expected lifetime of the battery in years
+ *
  */
 @Serializable
 public data class BatteryJSONSpec(
@@ -174,12 +177,9 @@ public data class BatteryJSONSpec(
     val chargingSpeed: Double,
     val batteryPolicy: BatteryPolicyJSONSpec,
     var initialCharge: Double = 0.0,
-) {
-    init {
-        this.capacity *= 3600000
-        this.initialCharge *= 3600000
-    }
-}
+    var embodiedCarbon: Double = 0.0,
+    var expectedLifetime: Double = 0.0,
+)
 
 @Serializable
 public data class BatteryPolicyJSONSpec(

opendc-simulator/opendc-simulator-compute/src/main/java/org/opendc/simulator/compute/power/batteries/SimBattery.java

@@ -49,6 +49,12 @@ public class SimBattery extends FlowNode implements FlowConsumer, FlowSupplier {
 
     private final String name;
     private final String clusterName;
+    private final Double embodiedCarbonRate; // The rate of carbon emissions per millisecond
+    private Double embodiedCarbonEmission = 0.0;
+
+    public Double getEmbodiedCarbonEmission() {
+        return embodiedCarbonEmission;
+    }
 
     public String getName() {
         return name;
@@ -112,25 +118,38 @@ public boolean isEmpty() {
     }
 
     /**
-     * Construct a new {@link FlowNode} instance.
+     * Construct a new {@link SimBattery} instance.
      *
-     * @param parentGraph The {@link FlowGraph} this stage belongs to.
+     * @param parentGraph The {@link FlowGraph} instance this battery is part of.
+     * @param capacity The capacity of the battery in kWh.
+     * @param chargingSpeed The charging speed of the battery in J.
+     * @param initialCharge The initial charge of the battery in kWh.
+     * @param name The name of the battery.
+     * @param clusterName The name of the cluster the battery is part of.
+     * @param totalEmbodiedCarbon The total embodied carbon used to manufacture the battery in kg.
+     * @param expectedLifeTime The expected lifetime of the battery in years.
      */
     public SimBattery(
             FlowGraph parentGraph,
             double capacity,
             double chargingSpeed,
             double initialCharge,
             String name,
-            String clusterName) {
+            String clusterName,
+            Double totalEmbodiedCarbon,
+            Double expectedLifeTime) {
 
         super(parentGraph);
-        this.capacity = capacity;
+        this.capacity = capacity * 3600000;
         this.chargingSpeed = chargingSpeed;
 
-        this.charge = initialCharge;
+        this.charge = initialCharge * 3600000;
         this.name = name;
         this.clusterName = clusterName;
+
+        // TODO: maybe change this to days instead of years?
+        this.embodiedCarbonRate =
+                (totalEmbodiedCarbon * 1000) / (expectedLifeTime * 365.0 * 24.0 * 60.0 * 60.0 * 1000.0);
     }
 
     public void close() {
@@ -188,6 +207,8 @@ public void updateCounters(long now) {
 
         long passedTime = now - lastUpdate;
 
+        this.embodiedCarbonEmission += this.embodiedCarbonRate * passedTime;
+
         this.updateCharge(passedTime);
         if (passedTime > 0) {
             double energyUsage = (this.outgoingSupply * passedTime * 0.001);