void OnOpenInducedStacks(object sender, RoutedEventArgs e)
{
StackSourceBuilder builder = new StackSourceBuilder(m_traceLog);
List <Stats.GCEvent> events = m_gcProcess.Events;
for (int i = 0; i < events.Count; i++)
{
Stats.GCEvent ev = events[i];
if (ev.IsInduced())
{
GcEventExtra extra = GetGcEventExtra(ev.GCNumber, false);
if (extra != null)
{
builder.AddSample(extra.GCStartThread, ev.PauseDurationMSec, ev.GCStartRelativeMSec,
String.Format("StartGC({0}, {1}, G{2})", ev.Reason, ev.Type, ev.GCGeneration),
extra.GCStartIndex);
}
}
}
StackSource source = builder.Stacks;
if (source.SampleIndexLimit == 0)
{
MessageBox.Show("No stacks found for induced GC", ".Net Heap Analyzer", MessageBoxButton.OK);
}
else
{
StackWindow stackWindow = null;
m_dataFile.StackWindowTo(null, ref stackWindow, source, "Induced GC", FirstEventTime, LastEventTime);
}
}
public List <Issue> GetIssues()
{
m_issues = new List <Issue>();
if (m_gcProcess.Total.TotalAllocatedMB == 0)
{
AddIssue(IssueType.Profiling, "No .Net heap allocation found.", "Turn on Clr/ClrPrivate ETW event providers and profile again.");
}
if (m_allocSites.Count == 0)
{
AddIssue(IssueType.Profiling, "No .Net allocation tick event found.", "Turn on Clr allocation tick event and profile again.");
}
if (m_gcProcess.ProcessCpuMSec == 0)
{
AddIssue(IssueType.Profiling, "No CPU sample event found.", "Turn on CPU sample event and profile again.");
}
else
{
double gcCpu = m_gcProcess.Total.TotalGCCpuMSec * 100.0 / m_gcProcess.ProcessCpuMSec;
if (gcCpu >= 40)
{
AddIssue(IssueType.Cpu, String.Format("GC CPU usage extremely high ({0:N1} %)", gcCpu), "Check memory allocation, fragmentation, data structure, object refereence");
}
else if (gcCpu >= 10)
{
AddIssue(IssueType.Cpu, String.Format("GC CPU usage higher than normal ({0:N1} %)", gcCpu), "Check memory allocation, fragmentation, data structure, object refereence");
}
}
List <Stats.GCEvent> events = m_gcProcess.Events;
for (int i = 0; i < events.Count; i++)
{
Stats.GCEvent e = events[i];
if (e.IsInduced())
{
m_induced++;
m_inducedPause += e.PauseDurationMSec;
}
if (e.IsAllocLarge())
{
m_allocLarge++;
m_allocLargePause += e.PauseDurationMSec;
}
}
if (m_induced != 0)
{
AddIssue(
IssueType.Cpu,
String.Format("There are {0:N0} induced GCs, causing total {1:N3} ms pause", m_induced, m_inducedPause),
"Check call stack to figure out who is inducing GC");
m_issue.Action = "Induced GC Stacks";
m_issue.OnClick = OnOpenInducedStacks;
}
if (m_allocLarge != 0)
{
AddIssue(
IssueType.Cpu,
String.Format("There are {0:N0} large object GCs, causing total {1:N3} ms pause", m_allocLarge, m_allocLargePause),
"Check call stacks to find LOH allocations");
m_issue.Action = "LOH Allocation Stacks";
m_issue.OnClick = OnOpenLargeAllocStacks;
}
return(m_issues);
}
