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[llvm-mca] Initialize each element in vector TimelineView::UsedBuffers to a default invalid buffer descriptor. NFCI 

Also change the default buffer size for UsedBuffer entries to -1 (i.e. "unknown
size"). No functional change intended.

llvm-svn: 340830
This commit is contained in:
Andrea Di Biagio 2018-08-28 15:07:11 +00:00
parent 8212eae996
commit 4269d64b20
2 changed files with 18 additions and 14 deletions
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27
llvm/tools/llvm-mca/Views/TimelineView.cpp
View File

@ -32,6 +32,10 @@ TimelineView::TimelineView(const MCSubtargetInfo &sti, MCInstPrinter &Printer,
WaitTimeEntry NullWTEntry = {0, 0, 0};
std::fill(WaitTime.begin(), WaitTime.end(), NullWTEntry);
std::pair<unsigned, int> NullUsedBufferEntry = {/* Invalid resource ID*/ 0,
/* unknown buffer size */ -1};
std::fill(UsedBuffer.begin(), UsedBuffer.end(), NullUsedBufferEntry);
}
void TimelineView::onReservedBuffers(const InstRef &IR,
@ -40,15 +44,12 @@ void TimelineView::onReservedBuffers(const InstRef &IR,
return;
const MCSchedModel &SM = STI.getSchedModel();
std::pair<unsigned, unsigned> BufferInfo = {0, 0};
std::pair<unsigned, int> BufferInfo = {0, -1};
for (const unsigned Buffer : Buffers) {
const MCProcResourceDesc &MCDesc = *SM.getProcResource(Buffer);
if (MCDesc.BufferSize <= 0)
continue;
unsigned OtherSize = static_cast<unsigned>(MCDesc.BufferSize);
if (!BufferInfo.first || BufferInfo.second > OtherSize) {
if (!BufferInfo.first || BufferInfo.second > MCDesc.BufferSize) {
BufferInfo.first = Buffer;
BufferInfo.second = OtherSize;
BufferInfo.second = MCDesc.BufferSize;
}
}
@ -97,19 +98,19 @@ void TimelineView::onEvent(const HWInstructionEvent &Event) {
}
static raw_ostream::Colors chooseColor(unsigned CumulativeCycles,
unsigned Executions,
unsigned BufferSize) {
if (CumulativeCycles && BufferSize == 0)
unsigned Executions, int BufferSize) {
if (CumulativeCycles && BufferSize < 0)
return raw_ostream::MAGENTA;
if (CumulativeCycles >= (BufferSize * Executions))
unsigned Size = static_cast<unsigned>(BufferSize);
if (CumulativeCycles >= Size * Executions)
return raw_ostream::RED;
if ((CumulativeCycles * 2) >= (BufferSize * Executions))
if ((CumulativeCycles * 2) >= Size * Executions)
return raw_ostream::YELLOW;
return raw_ostream::SAVEDCOLOR;
}
static void tryChangeColor(raw_ostream &OS, unsigned Cycles,
unsigned Executions, unsigned BufferSize) {
unsigned Executions, int BufferSize) {
if (!OS.has_colors())
return;
@ -135,7 +136,7 @@ void TimelineView::printWaitTimeEntry(formatted_raw_ostream &OS,
OS << Executions;
OS.PadToColumn(13);
unsigned BufferSize = UsedBuffer[SourceIndex].second;
int BufferSize = UsedBuffer[SourceIndex].second;
tryChangeColor(OS, Entry.CyclesSpentInSchedulerQueue, Executions, BufferSize);
OS << format("%.1f", floor((AverageTime1 * 10) + 0.5) / 10);
OS.PadToColumn(20);

5
llvm/tools/llvm-mca/Views/TimelineView.h
View File

@ -140,7 +140,10 @@ class TimelineView : public View {
unsigned CyclesSpentAfterWBAndBeforeRetire;
};
std::vector<WaitTimeEntry> WaitTime;
std::vector<std::pair<unsigned, unsigned>> UsedBuffer;
// This field is used to map instructions to buffered resources.
// Elements of this vector are <resourceID, BufferSizer> pairs.
std::vector<std::pair<unsigned, int>> UsedBuffer;
void printTimelineViewEntry(llvm::formatted_raw_ostream &OS,
const TimelineViewEntry &E, unsigned Iteration,