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, 13 deletions

diff --git a/opendc-compute/opendc-compute-workload/src/test/kotlin/org/opendc/compute/workload/util/PerformanceInterferenceReaderTest.kt b/opendc-compute/opendc-compute-workload/src/test/kotlin/org/opendc/compute/workload/util/VmInterferenceModelReaderTest.kt
index c79f0584..1c3e7149 100644
--- a/opendc-compute/opendc-compute-workload/src/test/kotlin/org/opendc/compute/workload/util/PerformanceInterferenceReaderTest.kt
+++ b/opendc-compute/opendc-compute-workload/src/test/kotlin/org/opendc/compute/workload/util/VmInterferenceModelReaderTest.kt
@@ -22,24 +22,16 @@
 
 package org.opendc.compute.workload.util
 
-import org.junit.jupiter.api.Assertions.assertEquals
 import org.junit.jupiter.api.Test
-import org.junit.jupiter.api.assertAll
+import org.junit.jupiter.api.assertDoesNotThrow
 
 /**
- * Test suite for the [PerformanceInterferenceReader] class.
+ * Test suite for the [VmInterferenceModelReader] class.
  */
-class PerformanceInterferenceReaderTest {
+class VmInterferenceModelReaderTest {
     @Test
     fun testSmoke() {
-        val input = checkNotNull(PerformanceInterferenceReader::class.java.getResourceAsStream("/perf-interference.json"))
-        val result = PerformanceInterferenceReader().read(input)
-
-        assertAll(
-            { assertEquals(2, result.size) },
-            { assertEquals(setOf("vm_a", "vm_c", "vm_x", "vm_y"), result[0].members) },
-            { assertEquals(0.0, result[0].targetLoad, 0.001) },
-            { assertEquals(0.8830158730158756, result[0].score, 0.001) }
-        )
+        val input = checkNotNull(VmInterferenceModelReader::class.java.getResourceAsStream("/perf-interference.json"))
+        assertDoesNotThrow { VmInterferenceModelReader().read(input) }
     }
 }