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#include "duration_histogram.h"
#include <util/generic/singleton.h>
#include <util/stream/str.h>
namespace {
ui64 SecondsRound(TDuration d) {
if (d.MilliSeconds() % 1000 >= 500) {
return d.Seconds() + 1;
} else {
return d.Seconds();
}
}
ui64 MilliSecondsRound(TDuration d) {
if (d.MicroSeconds() % 1000 >= 500) {
return d.MilliSeconds() + 1;
} else {
return d.MilliSeconds();
}
}
ui64 MinutesRound(TDuration d) {
if (d.Seconds() % 60 >= 30) {
return d.Minutes() + 1;
} else {
return d.Minutes();
}
}
}
namespace {
struct TMarks {
std::array<TDuration, TDurationHistogram::Buckets> Marks;
TMarks() {
Marks[0] = TDuration::Zero();
for (unsigned i = 1; i < TDurationHistogram::Buckets; ++i) {
if (i >= TDurationHistogram::SecondBoundary) {
Marks[i] = TDuration::Seconds(1) * (1 << (i - TDurationHistogram::SecondBoundary));
} else {
Marks[i] = TDuration::Seconds(1) / (1 << (TDurationHistogram::SecondBoundary - i));
}
}
}
};
}
TString TDurationHistogram::LabelBefore(unsigned i) {
Y_VERIFY(i < Buckets);
TDuration d = Singleton<TMarks>()->Marks[i];
TStringStream ss;
if (d == TDuration::Zero()) {
ss << "0";
} else if (d < TDuration::Seconds(1)) {
ss << MilliSecondsRound(d) << "ms";
} else if (d < TDuration::Minutes(1)) {
ss << SecondsRound(d) << "s";
} else {
ss << MinutesRound(d) << "m";
}
return ss.Str();
}
TString TDurationHistogram::PrintToString() const {
TStringStream ss;
for (auto time : Times) {
ss << time << "\n";
}
return ss.Str();
}
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