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Improved profiler - better filtering, show 'hot' paths

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This commit is contained in:
Brian Fiete 2023-03-14 09:32:01 -07:00
parent 68bc8976b8
commit 398cb0c7ad
5 changed files with 147 additions and 45 deletions
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129
IDEHelper/Profiler.cpp
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@ -343,10 +343,6 @@ void DbgProfiler::ThreadProc()
bool isThreadIdle = idleThreadSet.Contains(thread->mThreadId);
profileThreadInfo->mTotalSamples += curSampleCount;
if (isThreadIdle)
profileThreadInfo->mTotalIdleSamples += curSampleCount;
mDebugger->mActiveThread = thread;
::SuspendThread(thread->mHThread);
@ -354,14 +350,38 @@ void DbgProfiler::ThreadProc()
CPURegisters registers;
mDebugger->PopulateRegisters(&registers);
addr_target prevPC = 0;
bool traceIsValid = true;
int stackSize = 0;
for (int stackIdx = 0; stackIdx < maxStackTrace; stackIdx++)
{
auto pc = registers.GetPC();
if (pc <= 0xFFFF)
if (pc == 0)
{
bool* valuePtr = NULL;
if (mStackHeadCheckMap.TryAdd(prevPC, NULL, &valuePtr))
{
addr_target symbolOffset = 0;
String symbolName;
mDebugger->mDebugTarget->FindSymbolAt(prevPC, &symbolName, &symbolOffset, NULL, false);
*valuePtr = (symbolName == "RtlUserThreadStart");
}
if (!*valuePtr)
traceIsValid = false;
// Done - success (?). Check lastDbgModule.
break;
}
prevPC = pc;
auto lastDbgModule = mDebugger->mDebugTarget->FindDbgModuleForAddress(pc);
if (lastDbgModule == NULL)
{
traceIsValid = false;
break;
}
stackTrace[stackSize++] = pc;
auto prevSP = registers.GetSP();
if (!mDebugger->RollBackStackFrame(&registers, stackIdx == 0))
@ -369,30 +389,38 @@ void DbgProfiler::ThreadProc()
if (registers.GetSP() <= prevSP)
{
// SP went the wrong direction, stop rolling back
traceIsValid = false;
break;
}
}
ProfileAddrEntry* insertedProfileEntry = AddToSet(mProfileAddrEntrySet, stackTrace, stackSize);
if (insertedProfileEntry->mEntryIdx == -1)
if (traceIsValid)
{
insertedProfileEntry->mEntryIdx = (int)mProfileAddrEntrySet.size(); // Starts at '1'
mPendingProfileEntries.Add(*insertedProfileEntry);
}
for (int i = 0; i < curSampleCount; i++)
{
int entryIdx = insertedProfileEntry->mEntryIdx;
profileThreadInfo->mTotalSamples += curSampleCount;
if (isThreadIdle)
entryIdx = -entryIdx;
profileThreadInfo->mProfileAddrEntries.push_back(entryIdx);
profileThreadInfo->mTotalIdleSamples += curSampleCount;
ProfileAddrEntry* insertedProfileEntry = AddToSet(mProfileAddrEntrySet, stackTrace, stackSize);
if (insertedProfileEntry->mEntryIdx == -1)
{
insertedProfileEntry->mEntryIdx = (int)mProfileAddrEntrySet.size(); // Starts at '1'
mPendingProfileEntries.Add(*insertedProfileEntry);
}
for (int i = 0; i < curSampleCount; i++)
{
int entryIdx = insertedProfileEntry->mEntryIdx;
if (isThreadIdle)
entryIdx = -entryIdx;
profileThreadInfo->mProfileAddrEntries.push_back(entryIdx);
}
int elapsedTime = timeGetTime() - startTick;
mTotalActiveSamplingMS += elapsedTime;
}
::ResumeThread(thread->mHThread);
int elapsedTime = timeGetTime() - startTick;
mTotalActiveSamplingMS += elapsedTime;
mDebugger->mActiveThread = NULL;
threadIdx++;
@ -479,6 +507,7 @@ void DbgProfiler::AddEntries(String& str, Array<ProfileProcEntry*>& procEntries,
int mStackIdx;
};
Array<_QueuedEntry> workQueue;
int skipStackCount = 0;
auto _AddEntries = [&](int rangeStart, int rangeEnd, int stackIdx, ProfileProcId* findProc)
{
@ -486,7 +515,7 @@ void DbgProfiler::AddEntries(String& str, Array<ProfileProcEntry*>& procEntries,
int childSampleCount = 0;
// First arrange list so we only contain items that match 'findProc'
if (stackIdx != -1)
if (stackIdx >= skipStackCount)
{
for (int idx = rangeStart; idx < rangeEnd; idx++)
{
@ -551,6 +580,64 @@ void DbgProfiler::AddEntries(String& str, Array<ProfileProcEntry*>& procEntries,
};
_AddEntries(rangeStart, rangeEnd, stackIdx, findProc);
while (skipStackCount < 6)
{
bool isSkipValid = true;
for (int idx = rangeStart; idx < rangeEnd; idx++)
{
auto procEntry = procEntries[idx];
if (procEntry->mUsed)
continue;
int stackIdx = procEntry->mSize - 1 - skipStackCount;
if (stackIdx < 0)
{
isSkipValid = false;
break;
}
auto checkProc = procEntry->mData[procEntry->mSize - 1 - skipStackCount];
switch (skipStackCount)
{
case 0:
if (checkProc->mProcName != "RtlUserThreadStart")
isSkipValid = false;
break;
case 1:
if (checkProc->mProcName != "BaseThreadInitThunk")
isSkipValid = false;
break;
case 2:
if ((checkProc->mProcName != "__scrt_common_main_seh()") && (checkProc->mProcName != "mainCRTStartup()"))
isSkipValid = false;
break;
case 3:
if ((checkProc->mProcName != "invoke_main()") && (checkProc->mProcName != "main"))
isSkipValid = false;
break;
case 4:
if (checkProc->mProcName != "main")
isSkipValid = false;
break;
case 5:
if (checkProc->mProcName != "BeefStartProgram")
isSkipValid = false;
break;
default:
isSkipValid = false;
}
if (!isSkipValid)
break;
}
if (!isSkipValid)
break;
skipStackCount++;
}
while (!workQueue.IsEmpty())
{
auto& entry = workQueue.back();
@ -574,7 +661,7 @@ void DbgProfiler::AddEntries(String& str, Array<ProfileProcEntry*>& procEntries,
if (!addedChild)
{
if (entry.mStackIdx != -1)
if ((entry.mStackIdx != -1) && (entry.mStackIdx >= skipStackCount))
str += "-\n";
workQueue.pop_back();
}