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.

3 files changed, 223 insertions, 0 deletions

diff --git a/opendc-trace/opendc-trace-azure/src/test/kotlin/org/opendc/trace/azure/AzureTraceFormatTest.kt b/opendc-trace/opendc-trace-azure/src/test/kotlin/org/opendc/trace/azure/AzureTraceFormatTest.kt
new file mode 100644
index 00000000..e5735f0d
--- /dev/null
+++ b/opendc-trace/opendc-trace-azure/src/test/kotlin/org/opendc/trace/azure/AzureTraceFormatTest.kt
@@ -0,0 +1,113 @@
+/*
+ * 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.trace.azure
+
+import org.junit.jupiter.api.Assertions.*
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.assertThrows
+import org.opendc.trace.*
+import java.io.File
+import java.net.URL
+
+/**
+ * Test suite for the [AzureTraceFormat] class.
+ */
+class AzureTraceFormatTest {
+    private val format = AzureTraceFormat()
+
+    @Test
+    fun testTraceExists() {
+        val url = File("src/test/resources/trace").toURI().toURL()
+        assertDoesNotThrow {
+            format.open(url)
+        }
+    }
+
+    @Test
+    fun testTraceDoesNotExists() {
+        val url = File("src/test/resources/trace").toURI().toURL()
+        assertThrows<IllegalArgumentException> {
+            format.open(URL(url.toString() + "help"))
+        }
+    }
+
+    @Test
+    fun testTables() {
+        val url = File("src/test/resources/trace").toURI().toURL()
+        val trace = format.open(url)
+
+        assertEquals(listOf(TABLE_RESOURCES, TABLE_RESOURCE_STATES), trace.tables)
+    }
+
+    @Test
+    fun testTableExists() {
+        val url = File("src/test/resources/trace").toURI().toURL()
+        val table = format.open(url).getTable(TABLE_RESOURCE_STATES)
+
+        assertNotNull(table)
+        assertDoesNotThrow { table!!.newReader() }
+    }
+
+    @Test
+    fun testTableDoesNotExist() {
+        val url = File("src/test/resources/trace").toURI().toURL()
+        val trace = format.open(url)
+
+        assertFalse(trace.containsTable("test"))
+        assertNull(trace.getTable("test"))
+    }
+
+    @Test
+    fun testResources() {
+        val url = File("src/test/resources/trace").toURI().toURL()
+        val trace = format.open(url)
+
+        val reader = trace.getTable(TABLE_RESOURCES)!!.newReader()
+
+        assertAll(
+            { assertTrue(reader.nextRow()) },
+            { assertEquals("x/XsOfHO4ocsV99i4NluqKDuxctW2MMVmwqOPAlg4wp8mqbBOe3wxBlQo0+Qx+uf", reader.get(RESOURCE_ID)) },
+            { assertEquals(1, reader.getInt(RESOURCE_CPU_COUNT)) },
+            { assertEquals(1750000.0, reader.getDouble(RESOURCE_MEM_CAPACITY)) },
+        )
+
+        reader.close()
+    }
+
+    @Test
+    fun testSmoke() {
+        val url = File("src/test/resources/trace").toURI().toURL()
+        val trace = format.open(url)
+
+        val reader = trace.getTable(TABLE_RESOURCE_STATES)!!.newReader()
+
+        assertAll(
+            { assertTrue(reader.nextRow()) },
+            { assertEquals("+ZcrOp5/c/fJ6mVgP5qMZlOAGDwyjaaDNM0WoWOt2IDb47gT0UwK9lFwkPQv3C7Q", reader.get(RESOURCE_STATE_ID)) },
+            { assertEquals(0, reader.get(RESOURCE_STATE_TIMESTAMP).epochSecond) },
+            { assertEquals(2.86979, reader.getDouble(RESOURCE_STATE_CPU_USAGE_PCT), 0.01) }
+        )
+
+        reader.close()
+    }
+}
diff --git a/opendc-trace/opendc-trace-azure/src/test/resources/trace/vm_cpu_readings/vm_cpu_readings-file-1-of-125.csv b/opendc-trace/opendc-trace-azure/src/test/resources/trace/vm_cpu_readings/vm_cpu_readings-file-1-of-125.csv
new file mode 100644
index 00000000..db6ddf8a
--- /dev/null
+++ b/opendc-trace/opendc-trace-azure/src/test/resources/trace/vm_cpu_readings/vm_cpu_readings-file-1-of-125.csv
@@ -0,0 +1,100 @@
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+0,+CrXBNhT3ch1hYU2e9IGs7wfjSLRkKYgidJYc42LlsH39cYtwdAX3wKm1OGlf+Kl,18.815771,40.850218,22.470045

+0,/hXRrrjPrAw8xDSsJnEwLdkRN1e42zJLE/HO5DXk5gbGLRmRx5H9n4T0UmraZ8uW,0.361838,0.831517,0.423214

+0,/sTadDDv8poFeLWS7lD/SEtEgWCBHXB1IaiitjCru4AcK8Z32hNXlccdY8hlFzTp,3.203254,5.682829,3.859569

+0,333YaK054AGlUYuw0XWxYn5K8NwzhfzJ3mm4YNwB1YXKjgnO64ZItBNaBRQoOgXn,0.124811,0.384592,0.257066

+0,+ZkQz7QrPZIODz45A+60ZFnG18jnyYlSY/IgEe1Yj8c4cU8h+L8WDIKMv2uB7EwD,1.022656,6.508863,3.368929

+0,+X4DW7zA6whRfOWSHHONJ1u3f0DyBvC9PqDmXGFfbxT4aUGCC6kVm6fuGu9IsQyL,3.428286,15.183059,5.743137

+0,2KXdN0Pb4iyu0jVPocTTf3dwk2Z1LjIlAcydV3HURGIUn1dTycCDDCHg5G6l6i9t,0.282044,0.40582,0.311669

+0,2lGxRtUbBrRZmIYagONMp6vj0zHk4EGhu0aSH5Ws/CAXwBNZpCavBFDNCEcPsOkt,3.662958,8.660027,5.281077

+0,+IR6CKA4zeO742dCx1l2hR0plhTanlaxPWAbckkZNo6UAti83TpYPRXrrfdmm9Ar,0.086237,2.450893,0.969819

+0,2/hWJ+i+1FSHiD44Rr3S4xWMUHC6hIgoVBX2XGZ7cOFyLn9FWQ3Kevsocw7CGaxJ,1.499537,2.832775,1.900258

+0,1WnALZnCvRlfqnuRyrIf0wxQOGLhGuvxInHelnMBM6cw9G9hydTBxqV60JSL/48p,0.717535,5.066802,1.448937

diff --git a/opendc-trace/opendc-trace-azure/src/test/resources/trace/vmtable/vmtable.csv b/opendc-trace/opendc-trace-azure/src/test/resources/trace/vmtable/vmtable.csv
new file mode 100644
index 00000000..299c518c
--- /dev/null
+++ b/opendc-trace/opendc-trace-azure/src/test/resources/trace/vmtable/vmtable.csv
@@ -0,0 +1,10 @@
+x/XsOfHO4ocsV99i4NluqKDuxctW2MMVmwqOPAlg4wp8mqbBOe3wxBlQo0+Qx+uf,VDU4C8cqdr+ORcqquwMRcsBA2l0SC6lCPys0wdghKROuxPYysA2XYii9Y5ZkaYaq,Pc2VLB8aDxK2DCC96itq4vW/zVDp4wioAUiB3HoGSFYQ0o6/ZCegTpb9vEH4LeMTEWVObHTPRYEY81TYivZCMQ==,0,2591700,99.369869,3.4240942342446719,10.194309,Delay-insensitive,1,1.75

+H5CxmMoVcZSpjgGbohnVA3R+7uCTe/hM2ht2uIYi3t7KwXB4tkBxmZHBrt2A4x+n,BSXOcywx8pUU0DueDo6UMol1YzR6tn47KLEKaoXp0a1bf2PpzJ7n7lLlmhQ0OJf9,3J17LcV4gXjFat62qhVFRfoiWArHnY763HVqqI6orJCfV8h5j9yeotRMnCLlX1ooGkMyQ2MDOuY1oz111AGN9Q==,0,1539300,100,6.18178366757598,33.98136,Interactive,1,0.75

+wR/G1YUjpMP4zUbxGM/XJNhYS8cAK3SGKM2tqhF7VdeTUYHGktQiKQNoDTtYvnAc,VDU4C8cqdr+ORcqquwMRcsBA2l0SC6lCPys0wdghKROuxPYysA2XYii9Y5ZkaYaq,Pc2VLB8aDxK2DCC96itq4vW/zVDp4wioAUiB3HoGSFYQ0o6/ZCegTpb9vEH4LeMT+hzuAPZnYJMu61JNhTDF/Q==,2188800,2591700,99.569027,3.5736346071428589,7.92425,Delay-insensitive,1,1.75

+1XiU+KpvIa3T1XP8kk3ZY71Of03+ogFL5Pag9Mc2jBuh0YqeW0Zcb9lepKLdPEDg,8u+M3WcFp8pq183WoMB79PhK7xUzbaviOBv0qWN6Xn4mbuNVM1GYJlIjswgit+k1,DHbeI+pYTYFjH8JAF8SewM0z/4SqQctvxcBRGIRglBmeLW5VjISVEw7/IpY345kHwHtk7+SKlEwc1upnT3PigA==,0,2591700,99.405085,16.2876105408034,95.69789,Delay-insensitive,8,56

+z5i2HiSaz6ZdLR6PXdnDjGva3jIlkMPXx23VtfXx9q3dXFRBQrxCOj7sHUsrmFLa,VDU4C8cqdr+ORcqquwMRcsBA2l0SC6lCPys0wdghKROuxPYysA2XYii9Y5ZkaYaq,Pc2VLB8aDxK2DCC96itq4vW/zVDp4wioAUiB3HoGSFYQ0o6/ZCegTpb9vEH4LeMTEWVObHTPRYEY81TYivZCMQ==,0,2188500,98.967961,3.036037969572376,9.445484,Delay-insensitive,1,1.75

+n77nP00/UpJmT+Yx1ZkDphvAqPoHU8yUpDCwyUtPNlRENqvNp6Inya1eiy7VP1+x,8u+M3WcFp8pq183WoMB79PhK7xUzbaviOBv0qWN6Xn4mbuNVM1GYJlIjswgit+k1,DHbeI+pYTYFjH8JAF8SewM0z/4SqQctvxcBRGIRglBmeLW5VjISVEw7/IpY345kHwHtk7+SKlEwc1upnT3PigA==,0,2591700,99.448473,34.17401179027781,98.553018,Delay-insensitive,8,56

+aTSXW3N1KepxKYwKumd7T1+f7DkGolSKV8EArYAdctjD26YqSMKezCVSdvmSgqIQ,dBub/K+8I6jD9t2ExqUdRNlVxPPvDWqICA9Sr+yzcBZ/nNuC0W2swapPoBNIRoF+,C9GnRqFF2lzW/elUsLEwhyAQj9D/d5JIOOgvwfPL1aINf+m1f29G7nXhr6mRPGbiofmjfP9GkepcWz9LX5tp7Q==,2290500,2292300,94.113335,32.461745857142866,94.113335,Unkown,1,1.75

+uSkGH3DS6BVo3RFnw3GZb6WCFSmGgvgKi4HIj08yxO4f5ladUQc3pqDOtqRN0W9+,8u+M3WcFp8pq183WoMB79PhK7xUzbaviOBv0qWN6Xn4mbuNVM1GYJlIjswgit+k1,DHbeI+pYTYFjH8JAF8SewM0z/4SqQctvxcBRGIRglBmeLW5VjISVEw7/IpY345kHwHtk7+SKlEwc1upnT3PigA==,0,2591700,99.276369,1.3500837561060346,23.450372,Delay-insensitive,8,56

+ztRY/Sk5mrSFFcpy2usZ0YZZ7Eumq130/5BB8WVXfWaYvFkU+EhXUQ2kOFkCXuCw,dBub/K+8I6jD9t2ExqUdRNlVxPPvDWqICA9Sr+yzcBZ/nNuC0W2swapPoBNIRoF+,C9GnRqFF2lzW/elUsLEwhyAQj9D/d5JIOOgvwfPL1aINf+m1f29G7nXhr6mRPGbiofmjfP9GkepcWz9LX5tp7Q==,2281200,2300100,98.671595,43.724999781249991,98.13707,Unkown,1,1.75

+bJoIb8ras2ZNNSdAz3CAu4HYRd6k9MOqij/+6/+/5XaYw4+EoGdUEr74DCi974gJ,8u+M3WcFp8pq183WoMB79PhK7xUzbaviOBv0qWN6Xn4mbuNVM1GYJlIjswgit+k1,DHbeI+pYTYFjH8JAF8SewM0z/4SqQctvxcBRGIRglBmeLW5VjISVEw7/IpY345kHwHtk7+SKlEwc1upnT3PigA==,0,2591700,99.498748,18.989459534151351,94.751666,Interactive,8,56