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Fix segfault sorting runnable steps

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Same problem as d744362e4a.

    at /nix/store/ksvsbr7pg4z69bv6fbbc8h7x7rm2104m-gcc-4.9.3/include/c++/4.9.3/bits/predefined_ops.h:166
    __last@entry=..., __comp=...) at /nix/store/ksvsbr7pg4z69bv6fbbc8h7x7rm2104m-gcc-4.9.3/include/c++/4.9.3/bits/stl_algo.h:1827
    __comp=...) at /nix/store/ksvsbr7pg4z69bv6fbbc8h7x7rm2104m-gcc-4.9.3/include/c++/4.9.3/bits/stl_algo.h:4717
This commit is contained in:
Eelco Dolstra 2016-03-02 13:59:24 +01:00
parent bc958c508b
commit 6beee0ab49
2 changed files with 42 additions and 29 deletions
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55
src/hydra-queue-runner/dispatcher.cc
View file

@ -144,13 +144,40 @@ system_time State::doDispatch()
FIXME: O(n lg n); obviously, it would be better to keep a
runnable queue sorted by priority. */
std::vector<Step::ptr> runnableSorted;
struct StepInfo
{
Step::ptr step;
/* The lowest share used of any jobset depending on this
step. */
double lowestShareUsed = 1e9;
/* Info copied from step->state to ensure that the
comparator is a partial ordering (see MachineInfo). */
int highestGlobalPriority;
int highestLocalPriority;
BuildID lowestBuildID;
StepInfo(Step::ptr step, Step::State & step_) : step(step)
{
for (auto & jobset : step_.jobsets)
lowestShareUsed = std::min(lowestShareUsed, jobset->shareUsed());
highestGlobalPriority = step_.highestGlobalPriority;
highestLocalPriority = step_.highestLocalPriority;
lowestBuildID = step_.lowestBuildID;
}
};
std::vector<StepInfo> runnableSorted;
struct RunnablePerType
{
unsigned int count{0};
std::chrono::seconds waitTime{0};
};
std::unordered_map<std::string, RunnablePerType> runnablePerType;
{
auto runnable_(runnable.lock());
runnableSorted.reserve(runnable_->size());
@ -170,7 +197,6 @@ system_time State::doDispatch()
/* Skip previously failed steps that aren't ready
to be retried. */
{
auto step_(step->state.lock());
r.waitTime += std::chrono::duration_cast<std::chrono::seconds>(now - step_->runnableSince);
if (step_->tries > 0 && step_->after > now) {
@ -178,29 +204,19 @@ system_time State::doDispatch()
sleepUntil = step_->after;
continue;
}
}
runnableSorted.push_back(step);
runnableSorted.emplace_back(step, *step_);
}
}
for (auto & step : runnableSorted) {
auto step_(step->state.lock());
step_->lowestShareUsed = 1e9;
for (auto & jobset : step_->jobsets)
step_->lowestShareUsed = std::min(step_->lowestShareUsed, jobset->shareUsed());
}
sort(runnableSorted.begin(), runnableSorted.end(),
[](const Step::ptr & a, const Step::ptr & b)
[](const StepInfo & a, const StepInfo & b)
{
auto a_(a->state.lock());
auto b_(b->state.lock()); // FIXME: deadlock?
return
a_->highestGlobalPriority != b_->highestGlobalPriority ? a_->highestGlobalPriority > b_->highestGlobalPriority :
a_->lowestShareUsed != b_->lowestShareUsed ? a_->lowestShareUsed < b_->lowestShareUsed :
a_->highestLocalPriority != b_->highestLocalPriority ? a_->highestLocalPriority > b_->highestLocalPriority :
a_->lowestBuildID < b_->lowestBuildID;
a.highestGlobalPriority != b.highestGlobalPriority ? a.highestGlobalPriority > b.highestGlobalPriority :
a.lowestShareUsed != b.lowestShareUsed ? a.lowestShareUsed < b.lowestShareUsed :
a.highestLocalPriority != b.highestLocalPriority ? a.highestLocalPriority > b.highestLocalPriority :
a.lowestBuildID < b.lowestBuildID;
});
/* Find a machine with a free slot and find a step to run
@ -211,7 +227,8 @@ system_time State::doDispatch()
for (auto & mi : machinesSorted) {
if (mi.machine->state->currentJobs >= mi.machine->maxJobs) continue;
for (auto & step : runnableSorted) {
for (auto & stepInfo : runnableSorted) {
auto & step(stepInfo.step);
/* Can this machine do this step? */
if (!mi.machine->supportsStep(step)) continue;

4
src/hydra-queue-runner/state.hh
View file

@ -171,10 +171,6 @@ struct Step
step. */
int highestGlobalPriority{0};
/* The lowest share used of any jobset depending on this
step. */
double lowestShareUsed;
/* The highest local priority of any build depending on this
step. */
int highestLocalPriority{0};