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Add --shm-mlock-segment-on-creation option

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This commit is contained in:
David Rohr
2021-07-15 21:41:42 +02:00
committed by Alexey Rybalchenko
parent 38f9870893
commit a6193a380d
3 changed files with 32 additions and 21 deletions
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9
fairmq/shmem/Manager.h
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@@ -90,11 +90,13 @@ class Manager
LOG(debug) << "Generated shmid '" << fShmId << "' out of session id '" << sessionName << "'.";
bool mlockSegment = false;
bool mlockSegmentOnCreation = false;
bool zeroSegment = false;
bool autolaunchMonitor = false;
std::string allocationAlgorithm("rbtree_best_fit");
if (config) {
mlockSegment = config->GetProperty<bool>("shm-mlock-segment", mlockSegment);
mlockSegmentOnCreation = config->GetProperty<bool>("shm-mlock-segment-on-creation", mlockSegmentOnCreation);
zeroSegment = config->GetProperty<bool>("shm-zero-segment", zeroSegment);
autolaunchMonitor = config->GetProperty<bool>("shm-monitor", autolaunchMonitor);
allocationAlgorithm = config->GetProperty<std::string>("shm-allocation", allocationAlgorithm);
@@ -162,6 +164,13 @@ class Manager
}
ss << "Created ";
(fEventCounter->fCount)++;
if (mlockSegmentOnCreation) {
LOG(error) << "Locking the managed segment memory pages...";
if (mlock(boost::apply_visitor(SegmentAddress(), fSegments.at(fSegmentId)), boost::apply_visitor(SegmentSize(), fSegments.at(fSegmentId))) == -1) {
LOG(error) << "Could not lock the managed segment memory. Code: " << errno << ", reason: " << strerror(errno);
}
LOG(error) << "Successfully locked the managed segment memory pages.";
}
} else {
op = "open";
// found segment with the given id, opening