From 94e34d41eb384731333819a1dbe10539f9a5a14b Mon Sep 17 00:00:00 2001
From: Fabian Mastenbroek <mail.fabianm@gmail.com>
Date: Thu, 14 May 2020 18:30:26 +0200
Subject: perf: Improve performance interference model construction performance

---
 .../compute/core/workload/PerformanceInterferenceModel.kt    | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

(limited to 'opendc/opendc-compute/src')

diff --git a/opendc/opendc-compute/src/main/kotlin/com/atlarge/opendc/compute/core/workload/PerformanceInterferenceModel.kt b/opendc/opendc-compute/src/main/kotlin/com/atlarge/opendc/compute/core/workload/PerformanceInterferenceModel.kt
index 45024a49..fab4ae9d 100644
--- a/opendc/opendc-compute/src/main/kotlin/com/atlarge/opendc/compute/core/workload/PerformanceInterferenceModel.kt
+++ b/opendc/opendc-compute/src/main/kotlin/com/atlarge/opendc/compute/core/workload/PerformanceInterferenceModel.kt
@@ -58,10 +58,20 @@ class PerformanceInterferenceModel(
         lhs.hashCode().compareTo(rhs.hashCode())
     }
     val items = TreeSet(comparator)
+    val workloadToItem: Map<String, Set<PerformanceInterferenceModelItem>>
     private val colocatedWorkloads = TreeSet<String>()
 
     init {
-        this.items.addAll(items)
+        val workloadToItem = mutableMapOf<String, MutableSet<PerformanceInterferenceModelItem>>()
+
+        for (item in items) {
+            for (workload in item.workloadNames) {
+                workloadToItem.getOrPut(workload) { mutableSetOf() }.add(item)
+            }
+            this.items.add(item)
+        }
+
+        this.workloadToItem = workloadToItem
     }
 
     fun vmStarted(server: Server) {
-- 
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