diff options
| -rw-r--r-- | opendc/opendc-core/src/main/kotlin/com/atlarge/opendc/core/workload/PerformanceInterferenceModel.kt | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/opendc/opendc-core/src/main/kotlin/com/atlarge/opendc/core/workload/PerformanceInterferenceModel.kt b/opendc/opendc-core/src/main/kotlin/com/atlarge/opendc/core/workload/PerformanceInterferenceModel.kt index 78d5cd82..e2032ff1 100644 --- a/opendc/opendc-core/src/main/kotlin/com/atlarge/opendc/core/workload/PerformanceInterferenceModel.kt +++ b/opendc/opendc-core/src/main/kotlin/com/atlarge/opendc/core/workload/PerformanceInterferenceModel.kt @@ -1,6 +1,7 @@ package com.atlarge.opendc.core.workload import com.atlarge.opendc.core.resource.Resource +import kotlin.random.Random /** * Meta-data key for the [PerformanceInterferenceModel] of an image. @@ -24,10 +25,17 @@ data class PerformanceInterferenceModel( if (intersectingItems.isEmpty()) { return 1.0 } - return intersectingItems + val score = intersectingItems .filter { it.minServerLoad <= currentServerLoad } .map { it.performanceScore } - .min() ?: 1.0 + .min() + + // Apply performance penalty to (on average) only one of the VMs + return if (score != null && Random.nextInt(items.size) == 0) { + score + } else { + 1.0 + } } } |