Affinity AffinityRestrictions::get_all_cpus() const
{
Affinity all;
foreach(affinities, af)
{
all.insert(af->begin(), af->end());
}
AffinityTask::TaskSet AffinityTask::generateTaskSet(Computer* computer, Size numTask,
RandomDistribution* affinityDistribution,
Time minPeriod, Time maxPeriod, RandomDistribution* periodDistribution,
Real targetUtilization, RandomDistribution* utilDistribution)
{
AffinityTask::TaskSet ret;
CPUID maxAffinity = computer->getNumCPU();
UniformDistribution selector;
Real sum = 0;
for(Real util : utilDistribution->distribute(numTask, targetUtilization))
{
util = std::min(1.0, util);
Real realAffinity = affinityDistribution->nextDistribution(0, maxAffinity);
Size currentAffinityCount = ceil(realAffinity);
currentAffinityCount = std::min(currentAffinityCount, maxAffinity);
currentAffinityCount = std::max(currentAffinityCount, (Size)1);
Real realPeriod = periodDistribution->nextDistribution(minPeriod, maxPeriod);
Time period = ceil(realPeriod);
period = std::max(minPeriod, period);
period = std::min(maxPeriod, period);
Real realExecution = util * (Real)period;
Time execution = floor(realExecution);
if(execution == 0)
continue;
sum+=util;
Affinity affinity;
while(affinity.size() != currentAffinityCount)
{
CPUID selected = floor(selector.nextDistribution(0, maxAffinity));
if(selected == maxAffinity)
selected = maxAffinity-1;
affinity.insert(selected);
}
AffinityTask* task = new AffinityTask(affinity, computer, period, execution, 0);
ret.insert(task);
}
//printf("Sum of util %f\n", sum);
return ret;
}
std::set<Affinity> AffinityTask::powerSet(const Affinity& affinity)
{
assert(affinity.size() < 64);
assert(affinity.size() > 0);
std::set<Affinity> ret;
std::vector<CPUID> listedAffinity;
for(CPUID cpu : affinity)
listedAffinity.push_back(cpu);
uint64_t powerCount = 1 << (affinity.size());
for(uint64_t k=1; k<powerCount; k++)
{
Affinity subset;
for(uint64_t index=0; index<affinity.size(); index++)
{
if( (1UL << index) & k )
{
subset.insert(listedAffinity[index]);
}
}
ret.insert(subset);
}
return ret;
}
bool AffinityTask::staticStrongAnalysis(const TaskSet& taskSet, Time overhead)
{
AffinityTask::Compare compare;
std::unordered_map<AffinityTask*, Time> responseTime;
Affinity allCPU;
for(AffinityTask* task : taskSet)
{
responseTime.insert(std::pair<AffinityTask*, Time>(task, task->worstExecution));
for(auto cpu : task->affinity)
allCPU.insert(cpu);
}
while(true)
{
bool changed = false;
bool overflow = false;
std::unordered_map<AffinityTask*, Time> newResponseTime;
for(auto current : responseTime)
{
AffinityTask* curTask = current.first;
std::set<Affinity> powerSet = AffinityTask::powerSet(curTask->affinity);
Time currentResponse = responseTime.find(curTask)->second;
TaskSet ignoreTask;
ignoreTask.insert(curTask);
Time min_sumInterfere = std::numeric_limits<Time>::max();
for(Affinity s : powerSet)
{
assert(s.size() != 0);
Size s_Size = s.size();
//Time sumInterference = 0;
std::unordered_map<CPUID, std::list<TaskSet>> possibleReplacement;
for(auto cpu : s)
{
possibleReplacement.insert(std::pair<CPUID, std::list<TaskSet>>
(cpu, std::list<TaskSet>()));
}
for(CPUID selectedCPU : s)
{
Affinity ignoreCPU(s);
ignoreCPU.erase(selectedCPU);
for(auto alternative : allCPU)
{
if(ignoreCPU.find(alternative) != ignoreCPU.end())
continue;
auto allPaths = allPath(taskSet, selectedCPU, alternative, ignoreCPU, ignoreTask);
for(auto path : allPaths)
{
if(path.size() > 0)
{
TaskSet ignoredTask;
Affinity moreCheck;
for(auto item : path)
{
if(item.isTask())
ignoredTask.insert(item.getTask());
else
moreCheck.insert(item.getCPUID());
}
TaskSet highTaskSet;
for(AffinityTask* highPriorityTask : taskSet)
{
//if(compare(curTask, highPriorityTask))
// continue;
if(highPriorityTask == curTask)
continue;
if(ignoredTask.find(highPriorityTask) != ignoredTask.end())
continue;
bool intersect = false;
for(auto cpu : highPriorityTask->affinity)
{
if(moreCheck.find(cpu) != moreCheck.end())
{
intersect = true;
break;
}
}
if(!intersect)
continue;
highTaskSet.insert(highPriorityTask);
}
possibleReplacement.find(selectedCPU)->second.push_back(highTaskSet);
}
}
}
}
for(auto possibleSet : combinePossibleTaskSet(possibleReplacement))
{
Time sumInterference = 0;
/*
if(possibleSet.size() ==0)
continue;
assert(possibleSet.size() > 0);
*/
sumInterference += overhead;
for(auto highPriorityTask : possibleSet)
{
Time interferenceCount = currentResponse/highPriorityTask->minPeriod;
Time remaining = currentResponse % highPriorityTask->minPeriod;
Time interference = interferenceCount * highPriorityTask->worstExecution
+ std::min(remaining, highPriorityTask->worstExecution);
Time contextSwitchCount = interferenceCount;
if(remaining > 0)
contextSwitchCount++;
sumInterference += 2*(contextSwitchCount) * overhead;
if(compare(curTask, highPriorityTask))
continue;
sumInterference += interference;
}
Time floorValue = floor((Real)sumInterference / (Real)s_Size);
min_sumInterfere = std::min(min_sumInterfere, floorValue);
}
}
assert(min_sumInterfere != std::numeric_limits<Time>::max());
Time nextResponse = curTask->worstExecution + min_sumInterfere;
newResponseTime.insert(std::pair<AffinityTask*, Time>(curTask, nextResponse));
if(currentResponse != nextResponse)
changed = true;
if(currentResponse > curTask->minPeriod)
overflow = true;
}
if(changed)
responseTime = newResponseTime;
else
break;
if(overflow)
break;
}
bool possible = true;
for(auto iter : responseTime)
{
if(iter.second > iter.first->minPeriod)
{
possible = false;
iter.first->print_log(WARN, "Execution time: %lu, Period: %lu, Response time: %lu",
iter.first->worstExecution, iter.first->minPeriod, iter.second);
}
else
{
iter.first->print_log(INFO, "Execution time: %lu, Period: %lu, Response time: %lu",
iter.first->worstExecution, iter.first->minPeriod, iter.second);
}
}
return possible;
}
