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CMake/Source/CTest/cmCTestMultiProcessHandler.cxx

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/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
file Copyright.txt or https://cmake.org/licensing for details. */
#include "cmCTestMultiProcessHandler.h"
#include "cmCTest.h"
#include "cmCTestRunTest.h"
#include "cmCTestScriptHandler.h"
#include "cmCTestTestHandler.h"
#include "cmSystemTools.h"
#include <algorithm>
#include <cmsys/FStream.hxx>
#include <cmsys/String.hxx>
#include <cmsys/SystemInformation.hxx>
#include <iomanip>
#include <list>
#include <math.h>
#include <sstream>
#include <stack>
#include <stdlib.h>
#include <utility>
class TestComparator
{
public:
TestComparator(cmCTestMultiProcessHandler* handler)
: Handler(handler)
{
}
~TestComparator() {}
// Sorts tests in descending order of cost
bool operator()(int index1, int index2) const
{
return Handler->Properties[index1]->Cost >
Handler->Properties[index2]->Cost;
}
private:
cmCTestMultiProcessHandler* Handler;
};
cmCTestMultiProcessHandler::cmCTestMultiProcessHandler()
{
this->ParallelLevel = 1;
this->TestLoad = 0;
this->Completed = 0;
this->RunningCount = 0;
this->StopTimePassed = false;
this->HasCycles = false;
this->SerialTestRunning = false;
}
cmCTestMultiProcessHandler::~cmCTestMultiProcessHandler()
{
}
// Set the tests
void cmCTestMultiProcessHandler::SetTests(TestMap& tests,
PropertiesMap& properties)
{
this->Tests = tests;
this->Properties = properties;
this->Total = this->Tests.size();
// set test run map to false for all
for (TestMap::iterator i = this->Tests.begin(); i != this->Tests.end();
++i) {
this->TestRunningMap[i->first] = false;
this->TestFinishMap[i->first] = false;
}
if (!this->CTest->GetShowOnly()) {
this->ReadCostData();
this->HasCycles = !this->CheckCycles();
if (this->HasCycles) {
return;
}
this->CreateTestCostList();
}
}
// Set the max number of tests that can be run at the same time.
void cmCTestMultiProcessHandler::SetParallelLevel(size_t level)
{
this->ParallelLevel = level < 1 ? 1 : level;
}
void cmCTestMultiProcessHandler::SetTestLoad(unsigned long load)
{
this->TestLoad = load;
}
void cmCTestMultiProcessHandler::RunTests()
{
this->CheckResume();
if (this->HasCycles) {
return;
}
this->TestHandler->SetMaxIndex(this->FindMaxIndex());
this->StartNextTests();
while (!this->Tests.empty()) {
if (this->StopTimePassed) {
return;
}
this->CheckOutput();
this->StartNextTests();
}
// let all running tests finish
while (this->CheckOutput()) {
}
this->MarkFinished();
this->UpdateCostData();
}
void cmCTestMultiProcessHandler::StartTestProcess(int test)
{
cmCTestOptionalLog(this->CTest, HANDLER_VERBOSE_OUTPUT,
"test " << test << "\n", this->Quiet);
this->TestRunningMap[test] = true; // mark the test as running
// now remove the test itself
this->EraseTest(test);
this->RunningCount += GetProcessorsUsed(test);
cmCTestRunTest* testRun = new cmCTestRunTest(this->TestHandler);
if (this->CTest->GetRepeatUntilFail()) {
testRun->SetRunUntilFailOn();
testRun->SetNumberOfRuns(this->CTest->GetTestRepeat());
}
testRun->SetIndex(test);
testRun->SetTestProperties(this->Properties[test]);
// Find any failed dependencies for this test. We assume the more common
// scenario has no failed tests, so make it the outer loop.
for (std::vector<std::string>::const_iterator it = this->Failed->begin();
it != this->Failed->end(); ++it) {
if (this->Properties[test]->RequireSuccessDepends.find(*it) !=
this->Properties[test]->RequireSuccessDepends.end()) {
testRun->AddFailedDependency(*it);
}
}
std::string current_dir = cmSystemTools::GetCurrentWorkingDirectory();
cmSystemTools::ChangeDirectory(this->Properties[test]->Directory);
// Lock the resources we'll be using
this->LockResources(test);
if (testRun->StartTest(this->Total)) {
this->RunningTests.insert(testRun);
} else if (testRun->IsStopTimePassed()) {
this->StopTimePassed = true;
delete testRun;
return;
} else {
for (TestMap::iterator j = this->Tests.begin(); j != this->Tests.end();
++j) {
j->second.erase(test);
}
this->UnlockResources(test);
this->Completed++;
this->TestFinishMap[test] = true;
this->TestRunningMap[test] = false;
this->RunningCount -= GetProcessorsUsed(test);
testRun->EndTest(this->Completed, this->Total, false);
this->Failed->push_back(this->Properties[test]->Name);
delete testRun;
}
cmSystemTools::ChangeDirectory(current_dir);
}
void cmCTestMultiProcessHandler::LockResources(int index)
{
this->LockedResources.insert(
this->Properties[index]->LockedResources.begin(),
this->Properties[index]->LockedResources.end());
if (this->Properties[index]->RunSerial) {
this->SerialTestRunning = true;
}
}
void cmCTestMultiProcessHandler::UnlockResources(int index)
{
for (std::set<std::string>::iterator i =
this->Properties[index]->LockedResources.begin();
i != this->Properties[index]->LockedResources.end(); ++i) {
this->LockedResources.erase(*i);
}
if (this->Properties[index]->RunSerial) {
this->SerialTestRunning = false;
}
}
void cmCTestMultiProcessHandler::EraseTest(int test)
{
this->Tests.erase(test);
this->SortedTests.erase(
std::find(this->SortedTests.begin(), this->SortedTests.end(), test));
}
inline size_t cmCTestMultiProcessHandler::GetProcessorsUsed(int test)
{
size_t processors = static_cast<int>(this->Properties[test]->Processors);
// If processors setting is set higher than the -j
// setting, we default to using all of the process slots.
if (processors > this->ParallelLevel) {
processors = this->ParallelLevel;
}
return processors;
}
std::string cmCTestMultiProcessHandler::GetName(int test)
{
return this->Properties[test]->Name;
}
bool cmCTestMultiProcessHandler::StartTest(int test)
{
// Check for locked resources
for (std::set<std::string>::iterator i =
this->Properties[test]->LockedResources.begin();
i != this->Properties[test]->LockedResources.end(); ++i) {
if (this->LockedResources.find(*i) != this->LockedResources.end()) {
return false;
}
}
// if there are no depends left then run this test
if (this->Tests[test].empty()) {
this->StartTestProcess(test);
return true;
}
// This test was not able to start because it is waiting
// on depends to run
return false;
}
void cmCTestMultiProcessHandler::StartNextTests()
{
size_t numToStart = 0;
if (this->RunningCount < this->ParallelLevel) {
numToStart = this->ParallelLevel - this->RunningCount;
}
if (numToStart == 0) {
return;
}
// Don't start any new tests if one with the RUN_SERIAL property
// is already running.
if (this->SerialTestRunning) {
return;
}
bool allTestsFailedTestLoadCheck = false;
bool usedFakeLoadForTesting = false;
size_t minProcessorsRequired = this->ParallelLevel;
std::string testWithMinProcessors = "";
cmsys::SystemInformation info;
unsigned long systemLoad = 0;
size_t spareLoad = 0;
if (this->TestLoad > 0) {
// Activate possible wait.
allTestsFailedTestLoadCheck = true;
// Check for a fake load average value used in testing.
std::string fake_load_value;
if (cmSystemTools::GetEnv("__CTEST_FAKE_LOAD_AVERAGE_FOR_TESTING",
fake_load_value)) {
usedFakeLoadForTesting = true;
if (!cmSystemTools::StringToULong(fake_load_value.c_str(),
&systemLoad)) {
cmSystemTools::Error("Failed to parse fake load value: ",
fake_load_value.c_str());
}
}
// If it's not set, look up the true load average.
else {
systemLoad = static_cast<unsigned long>(ceil(info.GetLoadAverage()));
}
spareLoad =
(this->TestLoad > systemLoad ? this->TestLoad - systemLoad : 0);
// Don't start more tests than the spare load can support.
if (numToStart > spareLoad) {
numToStart = spareLoad;
}
}
TestList copy = this->SortedTests;
for (TestList::iterator test = copy.begin(); test != copy.end(); ++test) {
// Take a nap if we're currently performing a RUN_SERIAL test.
if (this->SerialTestRunning) {
break;
}
// We can only start a RUN_SERIAL test if no other tests are also running.
if (this->Properties[*test]->RunSerial && this->RunningCount > 0) {
continue;
}
size_t processors = GetProcessorsUsed(*test);
bool testLoadOk = true;
if (this->TestLoad > 0) {
if (processors <= spareLoad) {
cmCTestLog(this->CTest, DEBUG, "OK to run "
<< GetName(*test) << ", it requires " << processors
<< " procs & system load is: " << systemLoad
<< std::endl);
allTestsFailedTestLoadCheck = false;
} else {
testLoadOk = false;
}
}
if (processors <= minProcessorsRequired) {
minProcessorsRequired = processors;
testWithMinProcessors = GetName(*test);
}
if (testLoadOk && processors <= numToStart && this->StartTest(*test)) {
if (this->StopTimePassed) {
return;
}
numToStart -= processors;
} else if (numToStart == 0) {
break;
}
}
if (allTestsFailedTestLoadCheck) {
cmCTestLog(this->CTest, HANDLER_OUTPUT, "***** WAITING, ");
if (this->SerialTestRunning) {
cmCTestLog(this->CTest, HANDLER_OUTPUT,
"Waiting for RUN_SERIAL test to finish.");
} else {
/* clang-format off */
cmCTestLog(this->CTest, HANDLER_OUTPUT,
"System Load: " << systemLoad << ", "
"Max Allowed Load: " << this->TestLoad << ", "
"Smallest test " << testWithMinProcessors <<
" requires " << minProcessorsRequired);
/* clang-format on */
}
cmCTestLog(this->CTest, HANDLER_OUTPUT, "*****" << std::endl);
if (usedFakeLoadForTesting) {
// Break out of the infinite loop of waiting for our fake load
// to come down.
this->StopTimePassed = true;
} else {
// Wait between 1 and 5 seconds before trying again.
cmCTestScriptHandler::SleepInSeconds(cmSystemTools::RandomSeed() % 5 +
1);
}
}
}
bool cmCTestMultiProcessHandler::CheckOutput()
{
// no more output we are done
if (this->RunningTests.empty()) {
return false;
}
std::vector<cmCTestRunTest*> finished;
std::string out, err;
for (std::set<cmCTestRunTest*>::const_iterator i =
this->RunningTests.begin();
i != this->RunningTests.end(); ++i) {
cmCTestRunTest* p = *i;
if (!p->CheckOutput()) {
finished.push_back(p);
}
}
for (std::vector<cmCTestRunTest*>::iterator i = finished.begin();
i != finished.end(); ++i) {
this->Completed++;
cmCTestRunTest* p = *i;
int test = p->GetIndex();
bool testResult = p->EndTest(this->Completed, this->Total, true);
if (p->StartAgain()) {
this->Completed--; // remove the completed test because run again
continue;
}
if (testResult) {
this->Passed->push_back(p->GetTestProperties()->Name);
} else {
this->Failed->push_back(p->GetTestProperties()->Name);
}
for (TestMap::iterator j = this->Tests.begin(); j != this->Tests.end();
++j) {
j->second.erase(test);
}
this->TestFinishMap[test] = true;
this->TestRunningMap[test] = false;
this->RunningTests.erase(p);
this->WriteCheckpoint(test);
this->UnlockResources(test);
this->RunningCount -= GetProcessorsUsed(test);
delete p;
}
return true;
}
void cmCTestMultiProcessHandler::UpdateCostData()
{
std::string fname = this->CTest->GetCostDataFile();
std::string tmpout = fname + ".tmp";
cmsys::ofstream fout;
fout.open(tmpout.c_str());
PropertiesMap temp = this->Properties;
if (cmSystemTools::FileExists(fname.c_str())) {
cmsys::ifstream fin;
fin.open(fname.c_str());
std::string line;
while (std::getline(fin, line)) {
if (line == "---") {
break;
}
std::vector<cmsys::String> parts = cmSystemTools::SplitString(line, ' ');
// Format: <name> <previous_runs> <avg_cost>
if (parts.size() < 3) {
break;
}
std::string name = parts[0];
int prev = atoi(parts[1].c_str());
float cost = static_cast<float>(atof(parts[2].c_str()));
int index = this->SearchByName(name);
if (index == -1) {
// This test is not in memory. We just rewrite the entry
fout << name << " " << prev << " " << cost << "\n";
} else {
// Update with our new average cost
fout << name << " " << this->Properties[index]->PreviousRuns << " "
<< this->Properties[index]->Cost << "\n";
temp.erase(index);
}
}
fin.close();
cmSystemTools::RemoveFile(fname);
}
// Add all tests not previously listed in the file
for (PropertiesMap::iterator i = temp.begin(); i != temp.end(); ++i) {
fout << i->second->Name << " " << i->second->PreviousRuns << " "
<< i->second->Cost << "\n";
}
// Write list of failed tests
fout << "---\n";
for (std::vector<std::string>::iterator i = this->Failed->begin();
i != this->Failed->end(); ++i) {
fout << *i << "\n";
}
fout.close();
cmSystemTools::RenameFile(tmpout.c_str(), fname.c_str());
}
void cmCTestMultiProcessHandler::ReadCostData()
{
std::string fname = this->CTest->GetCostDataFile();
if (cmSystemTools::FileExists(fname.c_str(), true)) {
cmsys::ifstream fin;
fin.open(fname.c_str());
std::string line;
while (std::getline(fin, line)) {
if (line == "---") {
break;
}
std::vector<cmsys::String> parts = cmSystemTools::SplitString(line, ' ');
// Probably an older version of the file, will be fixed next run
if (parts.size() < 3) {
fin.close();
return;
}
std::string name = parts[0];
int prev = atoi(parts[1].c_str());
float cost = static_cast<float>(atof(parts[2].c_str()));
int index = this->SearchByName(name);
if (index == -1) {
continue;
}
this->Properties[index]->PreviousRuns = prev;
// When not running in parallel mode, don't use cost data
if (this->ParallelLevel > 1 && this->Properties[index] &&
this->Properties[index]->Cost == 0) {
this->Properties[index]->Cost = cost;
}
}
// Next part of the file is the failed tests
while (std::getline(fin, line)) {
if (line != "") {
this->LastTestsFailed.push_back(line);
}
}
fin.close();
}
}
int cmCTestMultiProcessHandler::SearchByName(std::string const& name)
{
int index = -1;
for (PropertiesMap::iterator i = this->Properties.begin();
i != this->Properties.end(); ++i) {
if (i->second->Name == name) {
index = i->first;
}
}
return index;
}
void cmCTestMultiProcessHandler::CreateTestCostList()
{
if (this->ParallelLevel > 1) {
CreateParallelTestCostList();
} else {
CreateSerialTestCostList();
}
}
void cmCTestMultiProcessHandler::CreateParallelTestCostList()
{
TestSet alreadySortedTests;
std::list<TestSet> priorityStack;
priorityStack.push_back(TestSet());
TestSet& topLevel = priorityStack.back();
// In parallel test runs add previously failed tests to the front
// of the cost list and queue other tests for further sorting
for (TestMap::const_iterator i = this->Tests.begin(); i != this->Tests.end();
++i) {
if (std::find(this->LastTestsFailed.begin(), this->LastTestsFailed.end(),
this->Properties[i->first]->Name) !=
this->LastTestsFailed.end()) {
// If the test failed last time, it should be run first.
this->SortedTests.push_back(i->first);
alreadySortedTests.insert(i->first);
} else {
topLevel.insert(i->first);
}
}
// In parallel test runs repeatedly move dependencies of the tests on
// the current dependency level to the next level until no
// further dependencies exist.
while (priorityStack.back().size()) {
TestSet& previousSet = priorityStack.back();
priorityStack.push_back(TestSet());
TestSet& currentSet = priorityStack.back();
for (TestSet::const_iterator i = previousSet.begin();
i != previousSet.end(); ++i) {
TestSet const& dependencies = this->Tests[*i];
currentSet.insert(dependencies.begin(), dependencies.end());
}
for (TestSet::const_iterator i = currentSet.begin(); i != currentSet.end();
++i) {
previousSet.erase(*i);
}
}
// Remove the empty dependency level
priorityStack.pop_back();
// Reverse iterate over the different dependency levels (deepest first).
// Sort tests within each level by COST and append them to the cost list.
for (std::list<TestSet>::reverse_iterator i = priorityStack.rbegin();
i != priorityStack.rend(); ++i) {
TestSet const& currentSet = *i;
TestComparator comp(this);
TestList sortedCopy;
sortedCopy.insert(sortedCopy.end(), currentSet.begin(), currentSet.end());
std::stable_sort(sortedCopy.begin(), sortedCopy.end(), comp);
for (TestList::const_iterator j = sortedCopy.begin();
j != sortedCopy.end(); ++j) {
if (alreadySortedTests.find(*j) == alreadySortedTests.end()) {
this->SortedTests.push_back(*j);
alreadySortedTests.insert(*j);
}
}
}
}
void cmCTestMultiProcessHandler::GetAllTestDependencies(int test,
TestList& dependencies)
{
TestSet const& dependencySet = this->Tests[test];
for (TestSet::const_iterator i = dependencySet.begin();
i != dependencySet.end(); ++i) {
GetAllTestDependencies(*i, dependencies);
dependencies.push_back(*i);
}
}
void cmCTestMultiProcessHandler::CreateSerialTestCostList()
{
TestList presortedList;
for (TestMap::iterator i = this->Tests.begin(); i != this->Tests.end();
++i) {
presortedList.push_back(i->first);
}
TestComparator comp(this);
std::stable_sort(presortedList.begin(), presortedList.end(), comp);
TestSet alreadySortedTests;
for (TestList::const_iterator i = presortedList.begin();
i != presortedList.end(); ++i) {
int test = *i;
if (alreadySortedTests.find(test) != alreadySortedTests.end()) {
continue;
}
TestList dependencies;
GetAllTestDependencies(test, dependencies);
for (TestList::const_iterator j = dependencies.begin();
j != dependencies.end(); ++j) {
int testDependency = *j;
if (alreadySortedTests.find(testDependency) ==
alreadySortedTests.end()) {
alreadySortedTests.insert(testDependency);
this->SortedTests.push_back(testDependency);
}
}
alreadySortedTests.insert(test);
this->SortedTests.push_back(test);
}
}
void cmCTestMultiProcessHandler::WriteCheckpoint(int index)
{
std::string fname =
this->CTest->GetBinaryDir() + "/Testing/Temporary/CTestCheckpoint.txt";
cmsys::ofstream fout;
fout.open(fname.c_str(), std::ios::app);
fout << index << "\n";
fout.close();
}
void cmCTestMultiProcessHandler::MarkFinished()
{
std::string fname =
this->CTest->GetBinaryDir() + "/Testing/Temporary/CTestCheckpoint.txt";
cmSystemTools::RemoveFile(fname);
}
// For ShowOnly mode
void cmCTestMultiProcessHandler::PrintTestList()
{
this->TestHandler->SetMaxIndex(this->FindMaxIndex());
int count = 0;
for (PropertiesMap::iterator it = this->Properties.begin();
it != this->Properties.end(); ++it) {
count++;
cmCTestTestHandler::cmCTestTestProperties& p = *it->second;
// push working dir
std::string current_dir = cmSystemTools::GetCurrentWorkingDirectory();
cmSystemTools::ChangeDirectory(p.Directory);
cmCTestRunTest testRun(this->TestHandler);
testRun.SetIndex(p.Index);
testRun.SetTestProperties(&p);
testRun.ComputeArguments(); // logs the command in verbose mode
if (!p.Labels.empty()) // print the labels
{
cmCTestOptionalLog(this->CTest, HANDLER_VERBOSE_OUTPUT, "Labels:",
this->Quiet);
}
for (std::vector<std::string>::iterator label = p.Labels.begin();
label != p.Labels.end(); ++label) {
cmCTestOptionalLog(this->CTest, HANDLER_VERBOSE_OUTPUT, " " << *label,
this->Quiet);
}
if (!p.Labels.empty()) // print the labels
{
cmCTestOptionalLog(this->CTest, HANDLER_VERBOSE_OUTPUT, std::endl,
this->Quiet);
}
if (this->TestHandler->MemCheck) {
cmCTestOptionalLog(this->CTest, HANDLER_OUTPUT, " Memory Check",
this->Quiet);
} else {
cmCTestOptionalLog(this->CTest, HANDLER_OUTPUT, " Test", this->Quiet);
}
std::ostringstream indexStr;
indexStr << " #" << p.Index << ":";
cmCTestOptionalLog(
this->CTest, HANDLER_OUTPUT,
std::setw(3 + getNumWidth(this->TestHandler->GetMaxIndex()))
<< indexStr.str(),
this->Quiet);
cmCTestOptionalLog(this->CTest, HANDLER_OUTPUT, " ", this->Quiet);
cmCTestOptionalLog(this->CTest, HANDLER_OUTPUT, p.Name << std::endl,
this->Quiet);
// pop working dir
cmSystemTools::ChangeDirectory(current_dir);
}
cmCTestOptionalLog(this->CTest, HANDLER_OUTPUT, std::endl
<< "Total Tests: " << this->Total << std::endl,
this->Quiet);
}
void cmCTestMultiProcessHandler::PrintLabels()
{
std::set<std::string> allLabels;
for (PropertiesMap::iterator it = this->Properties.begin();
it != this->Properties.end(); ++it) {
cmCTestTestHandler::cmCTestTestProperties& p = *it->second;
allLabels.insert(p.Labels.begin(), p.Labels.end());
}
if (!allLabels.empty()) {
cmCTestOptionalLog(this->CTest, HANDLER_OUTPUT, "All Labels:" << std::endl,
this->Quiet);
} else {
cmCTestOptionalLog(this->CTest, HANDLER_OUTPUT,
"No Labels Exist" << std::endl, this->Quiet);
}
for (std::set<std::string>::iterator label = allLabels.begin();
label != allLabels.end(); ++label) {
cmCTestOptionalLog(this->CTest, HANDLER_OUTPUT,
" " << *label << std::endl, this->Quiet);
}
}
void cmCTestMultiProcessHandler::CheckResume()
{
std::string fname =
this->CTest->GetBinaryDir() + "/Testing/Temporary/CTestCheckpoint.txt";
if (this->CTest->GetFailover()) {
if (cmSystemTools::FileExists(fname.c_str(), true)) {
*this->TestHandler->LogFile
<< "Resuming previously interrupted test set" << std::endl
<< "----------------------------------------------------------"
<< std::endl;
cmsys::ifstream fin;
fin.open(fname.c_str());
std::string line;
while (std::getline(fin, line)) {
int index = atoi(line.c_str());
this->RemoveTest(index);
}
fin.close();
}
} else if (cmSystemTools::FileExists(fname.c_str(), true)) {
cmSystemTools::RemoveFile(fname);
}
}
void cmCTestMultiProcessHandler::RemoveTest(int index)
{
this->EraseTest(index);
this->Properties.erase(index);
this->TestRunningMap[index] = false;
this->TestFinishMap[index] = true;
this->Completed++;
}
int cmCTestMultiProcessHandler::FindMaxIndex()
{
int max = 0;
cmCTestMultiProcessHandler::TestMap::iterator i = this->Tests.begin();
for (; i != this->Tests.end(); ++i) {
if (i->first > max) {
max = i->first;
}
}
return max;
}
// Returns true if no cycles exist in the dependency graph
bool cmCTestMultiProcessHandler::CheckCycles()
{
cmCTestOptionalLog(this->CTest, HANDLER_VERBOSE_OUTPUT,
"Checking test dependency graph..." << std::endl,
this->Quiet);
for (TestMap::iterator it = this->Tests.begin(); it != this->Tests.end();
++it) {
// DFS from each element to itself
int root = it->first;
std::set<int> visited;
std::stack<int> s;
s.push(root);
while (!s.empty()) {
int test = s.top();
s.pop();
if (visited.insert(test).second) {
for (TestSet::iterator d = this->Tests[test].begin();
d != this->Tests[test].end(); ++d) {
if (*d == root) {
// cycle exists
cmCTestLog(
this->CTest, ERROR_MESSAGE,
"Error: a cycle exists in the test dependency graph "
"for the test \""
<< this->Properties[root]->Name
<< "\".\nPlease fix the cycle and run ctest again.\n");
return false;
}
s.push(*d);
}
}
}
}
cmCTestOptionalLog(this->CTest, HANDLER_VERBOSE_OUTPUT,
"Checking test dependency graph end" << std::endl,
this->Quiet);
return true;
}
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