merge: Enable re-use of virtual machine workload helpers

This pull request enables re-use of virtual machine workload helpers by extracting the helpers into a 
separate module which may be used by other experiments.

- Support workload/machine CPU count mismatch
- Extract common code out of Capelin experiments
- Support flexible topology creation
- Add option for optimizing SimHost simulation
- Support creating CPU-optimized topology
- Make workload sampling model extensible
- Add support for extended Bitbrains trace format 
- Add support for Azure VM trace format
- Add support for internal OpenDC VM trace format
- Optimize OpenDC VM trace format
- Add tool for converting workload traces
- Remove dependency on SnakeYaml 

**Breaking API Changes**

-   `RESOURCE_NCPU` and `RESOURCE_STATE_NCPU` are renamed to `RESOURCE_CPU_COUNT` and `RESOURCE_STATE_CPU_COUNT` respectively.

2 files changed, 67 insertions, 0 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/PerformanceInterferenceReaderTest.kt
new file mode 100644
index 00000000..c79f0584
--- /dev/null
+++ b/opendc-compute/opendc-compute-workload/src/test/kotlin/org/opendc/compute/workload/util/PerformanceInterferenceReaderTest.kt
@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2021 AtLarge Research
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+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
+
+/**
+ * Test suite for the [PerformanceInterferenceReader] class.
+ */
+class PerformanceInterferenceReaderTest {
+    @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) }
+        )
+    }
+}
diff --git a/opendc-compute/opendc-compute-workload/src/test/resources/perf-interference.json b/opendc-compute/opendc-compute-workload/src/test/resources/perf-interference.json
new file mode 100644
index 00000000..1be5852b
--- /dev/null
+++ b/opendc-compute/opendc-compute-workload/src/test/resources/perf-interference.json
@@ -0,0 +1,22 @@
+[
+    {
+        "vms": [
+            "vm_a",
+            "vm_c",
+            "vm_x",
+            "vm_y"
+        ],
+        "minServerLoad": 0.0,
+        "performanceScore": 0.8830158730158756
+    },
+    {
+        "vms": [
+            "vm_a",
+            "vm_b",
+            "vm_c",
+            "vm_d"
+        ],
+        "minServerLoad": 0.0,
+        "performanceScore": 0.7133055555552751
+    }
+]