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, 96 insertions, 0 deletions

diff --git a/opendc-trace/opendc-trace-bitbrains/src/test/kotlin/org/opendc/trace/bitbrains/BitbrainsExTraceFormatTest.kt b/opendc-trace/opendc-trace-bitbrains/src/test/kotlin/org/opendc/trace/bitbrains/BitbrainsExTraceFormatTest.kt
new file mode 100644
index 00000000..2e4f176a
--- /dev/null
+++ b/opendc-trace/opendc-trace-bitbrains/src/test/kotlin/org/opendc/trace/bitbrains/BitbrainsExTraceFormatTest.kt
@@ -0,0 +1,94 @@
+/*
+ * 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.bitbrains
+
+import org.junit.jupiter.api.Assertions.*
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.assertThrows
+import org.opendc.trace.*
+import java.net.URL
+
+/**
+ * Test suite for the [BitbrainsExTraceFormat] class.
+ */
+class BitbrainsExTraceFormatTest {
+    private val format = BitbrainsExTraceFormat()
+
+    @Test
+    fun testTraceExists() {
+        val url = checkNotNull(BitbrainsExTraceFormatTest::class.java.getResource("/vm.txt"))
+        assertDoesNotThrow {
+            format.open(url)
+        }
+    }
+
+    @Test
+    fun testTraceDoesNotExists() {
+        val url = checkNotNull(BitbrainsExTraceFormatTest::class.java.getResource("/vm.txt"))
+        assertThrows<IllegalArgumentException> {
+            format.open(URL(url.toString() + "help"))
+        }
+    }
+
+    @Test
+    fun testTables() {
+        val url = checkNotNull(BitbrainsExTraceFormatTest::class.java.getResource("/vm.txt"))
+        val trace = format.open(url)
+
+        assertEquals(listOf(TABLE_RESOURCE_STATES), trace.tables)
+    }
+
+    @Test
+    fun testTableExists() {
+        val url = checkNotNull(BitbrainsExTraceFormatTest::class.java.getResource("/vm.txt"))
+        val table = format.open(url).getTable(TABLE_RESOURCE_STATES)
+
+        assertNotNull(table)
+        assertDoesNotThrow { table!!.newReader() }
+    }
+
+    @Test
+    fun testTableDoesNotExist() {
+        val url = checkNotNull(BitbrainsExTraceFormatTest::class.java.getResource("/vm.txt"))
+        val trace = format.open(url)
+
+        assertFalse(trace.containsTable("test"))
+        assertNull(trace.getTable("test"))
+    }
+
+    @Test
+    fun testSmoke() {
+        val url = checkNotNull(BitbrainsExTraceFormatTest::class.java.getResource("/vm.txt"))
+        val trace = format.open(url)
+
+        val reader = trace.getTable(TABLE_RESOURCE_STATES)!!.newReader()
+
+        assertAll(
+            { assertTrue(reader.nextRow()) },
+            { assertEquals(1631911500, reader.get(RESOURCE_STATE_TIMESTAMP).epochSecond) },
+            { assertEquals(21.2, reader.getDouble(RESOURCE_STATE_CPU_USAGE), 0.01) }
+        )
+
+        reader.close()
+    }
+}
diff --git a/opendc-trace/opendc-trace-bitbrains/src/test/resources/vm.txt b/opendc-trace/opendc-trace-bitbrains/src/test/resources/vm.txt
new file mode 100644
index 00000000..28bebb0c
--- /dev/null
+++ b/opendc-trace/opendc-trace-bitbrains/src/test/resources/vm.txt
@@ -0,0 +1,2 @@
+1631911500    21.2    22.10    0.0    0.0    0.67    1.2    0.0    0.0    5    1    abc    1    0.01    1    10    0.0    0.0  2699    vm    4096
+1631911800    30.4    31.80    0.0    0.0    0.56    1.3    0.0    0.0    5    1    abc    1    0.02    1    10    0.0    0.0    2699    vm    4096