merge: Standardize simulator metrics

This pull request standardizes the metrics emitted by the simulator based on OpenTelemetry conventions. 
From now on, all metrics exposed by the simulator are exported through OpenTelemetry 
following the recommended practices for naming, collection, etc.

**Implementation Notes**

- Improve ParquetDataWriter implementation 
- Simplify CoroutineMetricReader
- Create separate MeterProvider per service/host
- Standardize compute scheduler metrics 
- Standardize SimHost metrics 
- Use logical types for Parquet output columns 

**External Dependencies**

- Update to OpenTelemetry 1.6.0

**Breaking API Changes**

- Instead of supplying a `Meter` instances, key classes are now responsible for constructing 
   a `Meter` instance from the supplied `MeterProvider`.
- Export format has been changed to suit the outputted metrics
- Energy experiments shell has been removed

3 files changed, 9 insertions, 9 deletions

diff --git a/opendc-simulator/opendc-simulator-compute/src/main/kotlin/org/opendc/simulator/compute/SimAbstractMachine.kt b/opendc-simulator/opendc-simulator-compute/src/main/kotlin/org/opendc/simulator/compute/SimAbstractMachine.kt
index 266db0dd..f9db048d 100644
--- a/opendc-simulator/opendc-simulator-compute/src/main/kotlin/org/opendc/simulator/compute/SimAbstractMachine.kt
+++ b/opendc-simulator/opendc-simulator-compute/src/main/kotlin/org/opendc/simulator/compute/SimAbstractMachine.kt
@@ -49,22 +49,22 @@ public abstract class SimAbstractMachine(
     /**
      * The resources allocated for this machine.
      */
-    protected abstract val cpus: List<SimProcessingUnit>
+    public abstract val cpus: List<SimProcessingUnit>
 
     /**
      * The memory interface of the machine.
      */
-    protected val memory: SimMemory = Memory(SimResourceSource(model.memory.sumOf { it.size }.toDouble(), interpreter), model.memory)
+    public val memory: SimMemory = Memory(SimResourceSource(model.memory.sumOf { it.size }.toDouble(), interpreter), model.memory)
 
     /**
      * The network interfaces available to the machine.
      */
-    protected val net: List<SimNetworkInterface> = model.net.mapIndexed { i, adapter -> NetworkAdapterImpl(adapter, i) }
+    public val net: List<SimNetworkInterface> = model.net.mapIndexed { i, adapter -> NetworkAdapterImpl(adapter, i) }
 
     /**
      * The network interfaces available to the machine.
      */
-    protected val storage: List<SimStorageInterface> = model.storage.mapIndexed { i, device -> StorageDeviceImpl(interpreter, device, i) }
+    public val storage: List<SimStorageInterface> = model.storage.mapIndexed { i, device -> StorageDeviceImpl(interpreter, device, i) }
 
     /**
      * The peripherals of the machine.
diff --git a/opendc-simulator/opendc-simulator-compute/src/main/kotlin/org/opendc/simulator/compute/kernel/SimHypervisor.kt b/opendc-simulator/opendc-simulator-compute/src/main/kotlin/org/opendc/simulator/compute/kernel/SimHypervisor.kt
index af28c346..3b49d515 100644
--- a/opendc-simulator/opendc-simulator-compute/src/main/kotlin/org/opendc/simulator/compute/kernel/SimHypervisor.kt
+++ b/opendc-simulator/opendc-simulator-compute/src/main/kotlin/org/opendc/simulator/compute/kernel/SimHypervisor.kt
@@ -64,7 +64,7 @@ public interface SimHypervisor : SimWorkload {
          */
         public fun onSliceFinish(
             hypervisor: SimHypervisor,
-            requestedWork: Double,
+            totalWork: Double,
             grantedWork: Double,
             overcommittedWork: Double,
             interferedWork: Double,
diff --git a/opendc-simulator/opendc-simulator-compute/src/test/kotlin/org/opendc/simulator/compute/kernel/SimHypervisorTest.kt b/opendc-simulator/opendc-simulator-compute/src/test/kotlin/org/opendc/simulator/compute/kernel/SimHypervisorTest.kt
index 8dea0045..1f010338 100644
--- a/opendc-simulator/opendc-simulator-compute/src/test/kotlin/org/opendc/simulator/compute/kernel/SimHypervisorTest.kt
+++ b/opendc-simulator/opendc-simulator-compute/src/test/kotlin/org/opendc/simulator/compute/kernel/SimHypervisorTest.kt
@@ -70,14 +70,14 @@ internal class SimHypervisorTest {
 
             override fun onSliceFinish(
                 hypervisor: SimHypervisor,
-                requestedWork: Double,
+                totalWork: Double,
                 grantedWork: Double,
                 overcommittedWork: Double,
                 interferedWork: Double,
                 cpuUsage: Double,
                 cpuDemand: Double
             ) {
-                totalRequestedWork += requestedWork
+                totalRequestedWork += totalWork
                 totalGrantedWork += grantedWork
                 totalOvercommittedWork += overcommittedWork
             }
@@ -128,14 +128,14 @@ internal class SimHypervisorTest {
 
             override fun onSliceFinish(
                 hypervisor: SimHypervisor,
-                requestedWork: Double,
+                totalWork: Double,
                 grantedWork: Double,
                 overcommittedWork: Double,
                 interferedWork: Double,
                 cpuUsage: Double,
                 cpuDemand: Double
             ) {
-                totalRequestedWork += requestedWork
+                totalRequestedWork += totalWork
                 totalGrantedWork += grantedWork
                 totalOvercommittedWork += overcommittedWork
             }