/// <summary>
/// Updates the CPU utilization graph for the specified period, using the given
/// performance data.
/// </summary>
/// <param name="fromDate">The starting date of the specified period</param>
/// <param name="toDate">The ending date of the specified period</param>
private void UpdateUtilizationGraphByCPU_Nodes(DateTime fromDate, DateTime toDate, PerformanceData[] performanceDataItems)
{
DateTime peakLoadTime = fromDate;
DateTime minLoadTime = fromDate;
DateTime currentTime = fromDate;
DateTime incTime = currentTime;
// [DK] NOTE: We divide the period specified by the parameters 'fromDate'
// and 'toDate' into short timeslots. A timeslot is large
// enough to encompass performance info from all nodes in the
// network (i.e. it's larger than the Heartbeat interval). We
// then determine the utilization for each of these timeslots.
while (currentTime <= toDate)
{
// Record the start of the timeslot
abscissaData.Add(currentTime);
// Determine next timeslot
incTime = currentTime.AddSeconds(ReportingUtil.ChartTimeGranularity);
IDictionary<string, Node> nodes = new Dictionary<string, Node>();
// Get all possible NodeUris
foreach (PerformanceData pdata in performanceDataItems)
{
if (!ordinateDataForNodes.ContainsKey(pdata.NodeUri))
ordinateDataForNodes.Add(pdata.NodeUri, new List<double>());
}
// Determine the utilization for the given timeslot by
// finding all nodes and their average CPU usage within
// this period.
foreach (PerformanceData pdata in performanceDataItems)
{
if (pdata.TimeStamp >= currentTime)
{
if (pdata.TimeStamp <= incTime)
{
if (nodes.ContainsKey(pdata.NodeUri) == false)
{
Node newNode = new Node(pdata.NodeUri);
newNode.CpuCapacity = pdata.CpuCapacity;
newNode.MemoryCapacity = pdata.MemoryCapacity;
newNode.StorageCapacity = pdata.StorageCapacity;
nodes[pdata.NodeUri] = newNode;
}
Node node = nodes[pdata.NodeUri];
node.CpuUsage = (node.CpuUsage + pdata.CpuUsage) / 2;
}
else
{
break;
}
}
}
foreach (var ordinateDataNode in ordinateDataForNodes)
{
foreach (Node node in nodes.Values)
{
if (node.NodeUri == ordinateDataNode.Key)
{
ordinateDataNode.Value.Add(node.CpuUsage);
break;
}
}
ordinateDataNode.Value.Add(0);
}
// Move to the next timeslot
currentTime = incTime;
}
}
/// <summary>
/// Updates the CPU utilization graph for the specified period, using the given
/// performance data.
/// </summary>
/// <param name="fromDate">The starting date of the specified period</param>
/// <param name="toDate">The ending date of the specified period</param>
private void UpdateUtilizationGraphByCPU(DateTime fromDate, DateTime toDate, PerformanceData[] performanceDataItems)
{
int maxNodes = 0;
double minLoad = 100;
double peakLoad = 0;
double maxCpuCapacity = 0;
double minCpuCapacity = double.MaxValue;
double maxMemoryCapacity = 0;
double minMemoryCapacity = double.MaxValue;
double maxStorageCapacity = 0;
double minStorageCapacity = double.MaxValue;
DateTime peakLoadTime = fromDate;
DateTime minLoadTime = fromDate;
DateTime currentTime = fromDate;
DateTime incTime = currentTime;
// [DK] NOTE: We divide the period specified by the parameters 'fromDate'
// and 'toDate' into short timeslots. A timeslot is large
// enough to encompass performance info from all nodes in the
// network (i.e. it's larger than the Heartbeat interval). We
// then determine the utilization for each of these timeslots.
while (currentTime <= toDate)
{
// Record the start of the timeslot
abscissaData.Add(currentTime);
// Determine next timeslot
incTime = currentTime.AddSeconds(ReportingUtil.ChartTimeGranularity);
double cpuCapacity = 0;
double memoryCapacity = 0;
double storageCapacity = 0;
IDictionary<string, Node> nodes = new Dictionary<string, Node>();
// Determine the utilization for the given timeslot by
// finding all nodes and their average CPU usage within
// this period.
foreach (PerformanceData pdata in performanceDataItems)
{
if (pdata.TimeStamp >= currentTime)
{
if (pdata.TimeStamp <= incTime)
{
if (nodes.ContainsKey(pdata.NodeUri) == false)
{
Node newNode = new Node(pdata.NodeUri);
newNode.CpuCapacity = pdata.CpuCapacity;
newNode.MemoryCapacity = pdata.MemoryCapacity;
newNode.StorageCapacity = pdata.StorageCapacity;
nodes[pdata.NodeUri] = newNode;
}
Node node = nodes[pdata.NodeUri];
node.CpuUsage = (node.CpuUsage + pdata.CpuUsage) / 2;
}
else
{
break;
}
}
}
double totalCpuUsage = 0;
double cpuUsagePercent = 0;
// Compute utilization within this slot..
foreach (Node node in nodes.Values)
{
totalCpuUsage += node.CpuUsage;
cpuCapacity += node.CpuCapacity;
memoryCapacity += node.MemoryCapacity;
storageCapacity += node.StorageCapacity;
}
if (nodes.Count != 0)
{
cpuUsagePercent = totalCpuUsage / nodes.Count;
}
ordinateData.Add(cpuUsagePercent);
// Determine maximums for number of nodes, CPU, memory and storage
// capacity for the current time slot..
maxNodes = Math.Max(maxNodes, nodes.Count);
maxCpuCapacity = Math.Max(maxCpuCapacity, cpuCapacity);
minCpuCapacity = Math.Min(minCpuCapacity, cpuCapacity);
maxMemoryCapacity = Math.Max(maxMemoryCapacity, memoryCapacity);
minMemoryCapacity = Math.Min(minMemoryCapacity, memoryCapacity);
maxStorageCapacity = Math.Max(maxStorageCapacity, storageCapacity);
minStorageCapacity = Math.Min(minStorageCapacity, storageCapacity);
peakLoadTime = (cpuUsagePercent > peakLoad) ? currentTime : peakLoadTime;
peakLoad = Math.Max(peakLoad, cpuUsagePercent);
minLoadTime = (cpuUsagePercent < minLoad) ? currentTime : minLoadTime;
minLoad = Math.Min(minLoad, cpuUsagePercent);
// Move to the next timeslot
currentTime = incTime;
}
}