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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "metricsnapshot.h"
#include "metricmanager.h"
#include <cassert>
#include <vespa/log/log.h>
LOG_SETUP(".metrics.snapshot");
using vespalib::to_string;
using vespalib::to_s;
namespace metrics {
static constexpr system_time system_time_epoch = system_time();
MetricSnapshot::MetricSnapshot(const Metric::String& name)
: _name(name),
_period(0),
_fromTime(system_time_epoch),
_toTime(system_time_epoch),
_snapshot(new MetricSet("top", {}, "", nullptr)),
_metrics()
{
}
MetricSnapshot::MetricSnapshot(const Metric::String& name, system_time::duration period, const MetricSet& source, bool copyUnset)
: _name(name),
_period(period),
_fromTime(system_time_epoch),
_toTime(system_time_epoch),
_snapshot(),
_metrics()
{
_snapshot.reset(source.clone(_metrics, Metric::INACTIVE, nullptr, copyUnset));
_metrics.shrink_to_fit();
}
MetricSnapshot::~MetricSnapshot() = default;
void
MetricSnapshot::reset() {
reset(system_time_epoch);
}
void
MetricSnapshot::reset(system_time currentTime)
{
_fromTime = currentTime;
_toTime = system_time_epoch;
_snapshot->reset();
}
void
MetricSnapshot::recreateSnapshot(const MetricSet& metrics, bool copyUnset)
{
std::vector<Metric::UP> newMetrics;
Metric* m = metrics.clone(newMetrics, Metric::INACTIVE, nullptr, copyUnset);
assert(m->isMetricSet());
std::unique_ptr<MetricSet> newSnapshot(static_cast<MetricSet*>(m));
newSnapshot->reset();
_snapshot->addToSnapshot(*newSnapshot, newMetrics);
_snapshot = std::move(newSnapshot);
_metrics.swap(newMetrics);
_metrics.shrink_to_fit();
}
void
MetricSnapshot::addMemoryUsage(MemoryConsumption& mc) const
{
++mc._snapshotCount;
mc._snapshotName += mc.getStringMemoryUsage(_name, mc._snapshotNameUnique);
mc._snapshotMeta += sizeof(MetricSnapshot) + _metrics.capacity() * sizeof(Metric::SP);
_snapshot->addMemoryUsage(mc);
}
MetricSnapshotSet::MetricSnapshotSet(const Metric::String& name, system_time::duration period, uint32_t count,
const MetricSet& source, bool snapshotUnsetMetrics)
: _count(count),
_builderCount(0),
_current(std::make_unique<MetricSnapshot>(name, period, source, snapshotUnsetMetrics)),
_building(count == 1 ? nullptr : new MetricSnapshot(name, period, source, snapshotUnsetMetrics)),
_current_is_assigned(false)
{
_current->reset();
if (_building) _building->reset();
}
MetricSnapshotSet::~MetricSnapshotSet() = default;
MetricSnapshot&
MetricSnapshotSet::getNextTarget()
{
if (_count == 1) return *_current;
return *_building;
}
bool
MetricSnapshotSet::haveCompletedNewPeriod(system_time newFromTime)
{
if (_count == 1) {
_current->setToTime(newFromTime);
return true;
}
_building->setToTime(newFromTime);
// If not time to roll yet, just return
if (++_builderCount < _count) return false;
// Building buffer done. Use that as current and reset current.
std::swap(_current, _building);
_building->reset(newFromTime);
_builderCount = 0;
return true;
}
bool
MetricSnapshotSet::timeForAnotherSnapshot(system_time currentTime) {
system_time lastTime = getToTime();
vespalib::duration period = getPeriod();
if (currentTime >= lastTime + period) {
if (currentTime >= lastTime + 2 * period) {
LOG(warning, "Metric snapshot set %s was asked if it was time for another snapshot, a whole period beyond "
"when it should have been done (Last update was at time %s, current time is %s and period "
"is %f seconds). Clearing data and updating time to current time.",
getName().c_str(), to_string(lastTime).c_str(), to_string(currentTime).c_str(), to_s(getPeriod()));
reset(currentTime);
}
return true;
}
return false;
}
void
MetricSnapshotSet::reset(system_time currentTime) {
if (_count != 1) _building->reset(currentTime);
_current->reset(currentTime);
_builderCount = 0;
}
void
MetricSnapshotSet::recreateSnapshot(const MetricSet& metrics, bool copyUnset)
{
if (_count != 1) _building->recreateSnapshot(metrics, copyUnset);
_current->recreateSnapshot(metrics, copyUnset);
}
void
MetricSnapshotSet::addMemoryUsage(MemoryConsumption& mc) const
{
++mc._snapshotSetCount;
mc._snapshotSetMeta += sizeof(MetricSnapshotSet);
if (_count != 1) _building->addMemoryUsage(mc);
_current->addMemoryUsage(mc);
}
void
MetricSnapshotSet::setFromTime(system_time fromTime)
{
if (_count != 1) _building->setFromTime(fromTime);
_current->setFromTime(fromTime);
}
} // metrics
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