/** * Gets the times before vm migration. * * @param vms the vms * @return the times before vm migration */ public static List<Double> getTimesBeforeVmMigration(List<Vm> vms) { List<Double> timeBeforeVmMigration = new LinkedList<Double>(); for (Vm vm : vms) { boolean previousIsInMigration = false; double lastTimeMigrationFinished = 0; for (VmStateHistoryEntry entry : vm.getStateHistory()) { if (previousIsInMigration == true && entry.isInMigration() == false) { timeBeforeVmMigration.add(entry.getTime() - lastTimeMigrationFinished); } if (previousIsInMigration == false && entry.isInMigration() == true) { lastTimeMigrationFinished = entry.getTime(); } previousIsInMigration = entry.isInMigration(); } } return timeBeforeVmMigration; }
/** * Gets the sla metrics. * * @param vms the vms * @return the sla metrics */ protected static Map<String, Double> getSlaMetrics(List<Vm> vms) { Map<String, Double> metrics = new HashMap<String, Double>(); List<Double> slaViolation = new LinkedList<Double>(); double totalAllocated = 0; double totalRequested = 0; double totalUnderAllocatedDueToMigration = 0; for (Vm vm : vms) { double vmTotalAllocated = 0; double vmTotalRequested = 0; double vmUnderAllocatedDueToMigration = 0; double previousTime = -1; double previousAllocated = 0; double previousRequested = 0; boolean previousIsInMigration = false; for (VmStateHistoryEntry entry : vm.getStateHistory()) { if (previousTime != -1) { double timeDiff = entry.getTime() - previousTime; vmTotalAllocated += previousAllocated * timeDiff; vmTotalRequested += previousRequested * timeDiff; if (previousAllocated < previousRequested) { slaViolation.add((previousRequested - previousAllocated) / previousRequested); if (previousIsInMigration) { vmUnderAllocatedDueToMigration += (previousRequested - previousAllocated) * timeDiff; } } } previousAllocated = entry.getAllocatedMips(); previousRequested = entry.getRequestedMips(); previousTime = entry.getTime(); previousIsInMigration = entry.isInMigration(); } totalAllocated += vmTotalAllocated; totalRequested += vmTotalRequested; totalUnderAllocatedDueToMigration += vmUnderAllocatedDueToMigration; } metrics.put("overall", (totalRequested - totalAllocated) / totalRequested); if (slaViolation.isEmpty()) { metrics.put("average", 0.); } else { metrics.put("average", MathUtil.mean(slaViolation)); } metrics.put("underallocated_migration", totalUnderAllocatedDueToMigration / totalRequested); // metrics.put("sla_time_per_vm_with_migration", slaViolationTimePerVmWithMigration / // totalTime); // metrics.put("sla_time_per_vm_without_migration", slaViolationTimePerVmWithoutMigration / // totalTime); return metrics; }