void SamplingTool::dump(ExecState* exec)
{
// Tidies up SunSpider output by removing short scripts - such a small number of samples would likely not be useful anyhow.
if (m_sampleCount < 10)
return;
// (1) Build and sort 'opcodeSampleInfo' array.
OpcodeSampleInfo opcodeSampleInfo[numOpcodeIDs];
for (int i = 0; i < numOpcodeIDs; ++i) {
opcodeSampleInfo[i].opcode = static_cast<OpcodeID>(i);
opcodeSampleInfo[i].count = m_opcodeSamples[i];
opcodeSampleInfo[i].countInCTIFunctions = m_opcodeSamplesInCTIFunctions[i];
}
qsort(opcodeSampleInfo, numOpcodeIDs, sizeof(OpcodeSampleInfo), compareOpcodeIndicesSampling);
// (2) Print Opcode sampling results.
printf("\nBytecode samples [*]\n");
printf(" sample %% of %% of | cti cti %%\n");
printf("opcode count VM total | count of self\n");
printf("------------------------------------------------------- | ----------------\n");
for (int i = 0; i < numOpcodeIDs; ++i) {
long long count = opcodeSampleInfo[i].count;
if (!count)
continue;
OpcodeID opcodeID = opcodeSampleInfo[i].opcode;
const char* opcodeName = opcodeNames[opcodeID];
const char* opcodePadding = padOpcodeName(opcodeID, 28);
double percentOfVM = (static_cast<double>(count) * 100) / m_opcodeSampleCount;
double percentOfTotal = (static_cast<double>(count) * 100) / m_sampleCount;
long long countInCTIFunctions = opcodeSampleInfo[i].countInCTIFunctions;
double percentInCTIFunctions = (static_cast<double>(countInCTIFunctions) * 100) / count;
fprintf(stdout, "%s:%s%-6lld %.3f%%\t%.3f%%\t | %-6lld %.3f%%\n", opcodeName, opcodePadding, count, percentOfVM, percentOfTotal, countInCTIFunctions, percentInCTIFunctions);
}
printf("\n[*] Samples inside host code are not charged to any Bytecode.\n\n");
printf("\tSamples inside VM:\t\t%lld / %lld (%.3f%%)\n", m_opcodeSampleCount, m_sampleCount, (static_cast<double>(m_opcodeSampleCount) * 100) / m_sampleCount);
printf("\tSamples inside host code:\t%lld / %lld (%.3f%%)\n\n", m_sampleCount - m_opcodeSampleCount, m_sampleCount, (static_cast<double>(m_sampleCount - m_opcodeSampleCount) * 100) / m_sampleCount);
printf("\tsample count:\tsamples inside this opcode\n");
printf("\t%% of VM:\tsample count / all opcode samples\n");
printf("\t%% of total:\tsample count / all samples\n");
printf("\t--------------\n");
printf("\tcti count:\tsamples inside a CTI function called by this opcode\n");
printf("\tcti %% of self:\tcti count / sample count\n");
#if ENABLE(CODEBLOCK_SAMPLING)
// (3) Build and sort 'codeBlockSamples' array.
int scopeCount = m_scopeSampleMap->size();
Vector<ScopeSampleRecord*> codeBlockSamples(scopeCount);
ScopeSampleRecordMap::iterator iter = m_scopeSampleMap->begin();
for (int i = 0; i < scopeCount; ++i, ++iter)
codeBlockSamples[i] = iter->second;
qsort(codeBlockSamples.begin(), scopeCount, sizeof(ScopeSampleRecord*), compareScopeSampleRecords);
// (4) Print data from 'codeBlockSamples' array.
printf("\nCodeBlock samples\n\n");
for (int i = 0; i < scopeCount; ++i) {
ScopeSampleRecord* record = codeBlockSamples[i];
CodeBlock* codeBlock = record->m_codeBlock;
double blockPercent = (record->m_sampleCount * 100.0) / m_sampleCount;
if (blockPercent >= 1) {
//Instruction* code = codeBlock->instructions().begin();
printf("#%d: %s:%d: %d / %lld (%.3f%%)\n", i + 1, record->m_scope->sourceURL().UTF8String().c_str(), codeBlock->lineNumberForBytecodeOffset(exec, 0), record->m_sampleCount, m_sampleCount, blockPercent);
if (i < 10) {
HashMap<unsigned,unsigned> lineCounts;
codeBlock->dump(exec);
printf(" Opcode and line number samples [*]\n\n");
for (unsigned op = 0; op < record->m_size; ++op) {
int count = record->m_samples[op];
if (count) {
printf(" [% 4d] has sample count: % 4d\n", op, count);
unsigned line = codeBlock->lineNumberForBytecodeOffset(exec, op);
lineCounts.set(line, (lineCounts.contains(line) ? lineCounts.get(line) : 0) + count);
}
}
printf("\n");
int linesCount = lineCounts.size();
Vector<LineCountInfo> lineCountInfo(linesCount);
int lineno = 0;
for (HashMap<unsigned,unsigned>::iterator iter = lineCounts.begin(); iter != lineCounts.end(); ++iter, ++lineno) {
lineCountInfo[lineno].line = iter->first;
lineCountInfo[lineno].count = iter->second;
}
qsort(lineCountInfo.begin(), linesCount, sizeof(LineCountInfo), compareLineCountInfoSampling);
for (lineno = 0; lineno < linesCount; ++lineno) {
printf(" Line #%d has sample count %d.\n", lineCountInfo[lineno].line, lineCountInfo[lineno].count);
}
printf("\n");
printf(" [*] Samples inside host code are charged to the calling Bytecode.\n");
printf(" Samples on a call / return boundary are not charged to a specific opcode or line.\n\n");
printf(" Samples on a call / return boundary: %d / %d (%.3f%%)\n\n", record->m_sampleCount - record->m_opcodeSampleCount, record->m_sampleCount, (static_cast<double>(record->m_sampleCount - record->m_opcodeSampleCount) * 100) / record->m_sampleCount);
}
}
}
#else
UNUSED_PARAM(exec);
#endif
}
OpcodeStats::~OpcodeStats()
{
long long totalInstructions = 0;
for (int i = 0; i < numOpcodeIDs; ++i)
totalInstructions += opcodeCounts[i];
long long totalInstructionPairs = 0;
for (int i = 0; i < numOpcodeIDs; ++i)
for (int j = 0; j < numOpcodeIDs; ++j)
totalInstructionPairs += opcodePairCounts[i][j];
FixedArray<int, numOpcodeIDs> sortedIndices;
for (int i = 0; i < numOpcodeIDs; ++i)
sortedIndices[i] = i;
qsort(sortedIndices.data(), numOpcodeIDs, sizeof(int), compareOpcodeIndices);
pair<int, int> sortedPairIndices[numOpcodeIDs * numOpcodeIDs];
pair<int, int>* currentPairIndex = sortedPairIndices;
for (int i = 0; i < numOpcodeIDs; ++i)
for (int j = 0; j < numOpcodeIDs; ++j)
*(currentPairIndex++) = make_pair(i, j);
qsort(sortedPairIndices, numOpcodeIDs * numOpcodeIDs, sizeof(pair<int, int>), compareOpcodePairIndices);
printf("\nExecuted opcode statistics\n");
printf("Total instructions executed: %lld\n\n", totalInstructions);
printf("All opcodes by frequency:\n\n");
for (int i = 0; i < numOpcodeIDs; ++i) {
int index = sortedIndices[i];
printf("%s:%s %lld - %.2f%%\n", opcodeNames[index], padOpcodeName((OpcodeID)index, 28), opcodeCounts[index], ((double) opcodeCounts[index]) / ((double) totalInstructions) * 100.0);
}
printf("\n");
printf("2-opcode sequences by frequency: %lld\n\n", totalInstructions);
for (int i = 0; i < numOpcodeIDs * numOpcodeIDs; ++i) {
pair<int, int> indexPair = sortedPairIndices[i];
long long count = opcodePairCounts[indexPair.first][indexPair.second];
if (!count)
break;
printf("%s%s %s:%s %lld %.2f%%\n", opcodeNames[indexPair.first], padOpcodeName((OpcodeID)indexPair.first, 28), opcodeNames[indexPair.second], padOpcodeName((OpcodeID)indexPair.second, 28), count, ((double) count) / ((double) totalInstructionPairs) * 100.0);
}
printf("\n");
printf("Most common opcodes and sequences:\n");
for (int i = 0; i < numOpcodeIDs; ++i) {
int index = sortedIndices[i];
long long opcodeCount = opcodeCounts[index];
double opcodeProportion = ((double) opcodeCount) / ((double) totalInstructions);
if (opcodeProportion < 0.0001)
break;
printf("\n%s:%s %lld - %.2f%%\n", opcodeNames[index], padOpcodeName((OpcodeID)index, 28), opcodeCount, opcodeProportion * 100.0);
for (int j = 0; j < numOpcodeIDs * numOpcodeIDs; ++j) {
pair<int, int> indexPair = sortedPairIndices[j];
long long pairCount = opcodePairCounts[indexPair.first][indexPair.second];
double pairProportion = ((double) pairCount) / ((double) totalInstructionPairs);
if (!pairCount || pairProportion < 0.0001 || pairProportion < opcodeProportion / 100)
break;
if (indexPair.first != index && indexPair.second != index)
continue;
printf(" %s%s %s:%s %lld - %.2f%%\n", opcodeNames[indexPair.first], padOpcodeName((OpcodeID)indexPair.first, 28), opcodeNames[indexPair.second], padOpcodeName((OpcodeID)indexPair.second, 28), pairCount, pairProportion * 100.0);
}
}
printf("\n");
}