merge: Improve the OpenDC compute model (#37)

This pull request contains various improvements to the OpenDC compute simulation model.

- Support filtering hosts based on CPU capacity
- Do not allocate lambda in fast-path
- Redesign VM interference algorithm
- Report provisioning time of virtual machines
- Prevent allocations during collection cycle 
- Use correct flow input capacity for counters
- Support running workloads without coroutines

**Breaking API Changes**

- `VirtualMachine` now requires `cpuCapacity` parameter.
- `VmInterferenceModel` needs to be constructed using `VmInterferenceModel.Builder` and can't be passed a list of groups anymore.
- Scheduling latency is not collected anymore. Instead, use the boot time and provisioning time to derive the scheduling latency.
- Telemetry data is recorded using `*TableReader` interfaces as opposed to the `*Data` classes. These classes are re-used per row and should not be shared with other threads, since the underlying data may change.
- `SimMachine` does not implement `AutoCloseable` anymore. Machines can be removed from a `SimHypervisor` using the `removeMachine` method.
- `SimMachine.run` is moved to an extension method called `runWorkload`. Users can now also choose to run a workload using the asynchronous `SimMachine.startWorkload`.

1 files changed, 5 insertions, 2 deletions

diff --git a/opendc-experiments/opendc-experiments-tf20/src/main/kotlin/org/opendc/experiments/tf20/core/SimTFDevice.kt b/opendc-experiments/opendc-experiments-tf20/src/main/kotlin/org/opendc/experiments/tf20/core/SimTFDevice.kt
index fb36d2c7..1752802f 100644
--- a/opendc-experiments/opendc-experiments-tf20/src/main/kotlin/org/opendc/experiments/tf20/core/SimTFDevice.kt
+++ b/opendc-experiments/opendc-experiments-tf20/src/main/kotlin/org/opendc/experiments/tf20/core/SimTFDevice.kt
@@ -34,6 +34,7 @@ import org.opendc.simulator.compute.model.MemoryUnit
 import org.opendc.simulator.compute.model.ProcessingUnit
 import org.opendc.simulator.compute.power.PowerModel
 import org.opendc.simulator.compute.power.SimplePowerDriver
+import org.opendc.simulator.compute.runWorkload
 import org.opendc.simulator.compute.workload.SimWorkload
 import org.opendc.simulator.flow.*
 import java.time.Clock
@@ -128,6 +129,8 @@ public class SimTFDevice(
             }
         }
 
+        override fun onStop(ctx: SimMachineContext) {}
+
         override fun onStart(conn: FlowConnection, now: Long) {
             ctx = conn
             capacity = conn.capacity
@@ -172,7 +175,7 @@ public class SimTFDevice(
 
     init {
         scope.launch {
-            machine.run(workload)
+            machine.runWorkload(workload)
         }
     }
 
@@ -189,7 +192,7 @@ public class SimTFDevice(
     }
 
     override fun close() {
-        machine.close()
+        machine.cancel()
         scope.cancel()
     }