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Merge branch 'master' into performance

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Conflicts:
	db/db_impl.cc
	db/db_test.cc
	db/memtable.cc
	db/version_set.cc
	include/rocksdb/statistics.h
	util/statistics_imp.h
This commit is contained in:
Kai Liu
2014-01-23 16:32:49 -08:00
parent bb19b530ca 4e91f27c3a
commit 054c5dda8c
34 changed files with 5190 additions and 439 deletions
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46
include/rocksdb/statistics.h
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@@ -239,53 +239,11 @@ struct HistogramData {
double standard_deviation;
};
class Histogram {
public:
// clear's the histogram
virtual void Clear() = 0;
virtual ~Histogram();
// Add a value to be recorded in the histogram.
virtual void Add(uint64_t value) = 0;
virtual std::string ToString() const = 0;
// Get statistics
virtual double Median() const = 0;
virtual double Percentile(double p) const = 0;
virtual double Average() const = 0;
virtual double StandardDeviation() const = 0;
virtual void Data(HistogramData * const data) const = 0;
};
/**
* A dumb ticker which keeps incrementing through its life time.
* Thread safe. Locking managed by implementation of this interface.
*/
class Ticker {
public:
Ticker() : count_(0) { }
inline void setTickerCount(uint64_t count) {
count_ = count;
}
inline void recordTick(int64_t count = 1) {
count_ += count;
}
inline uint64_t getCount() {
return count_;
}
private:
std::atomic_uint_fast64_t count_;
};
// Analyze the performance of a db
class Statistics {
public:
virtual ~Statistics() {}
virtual long getTickerCount(Tickers tickerType) = 0;
virtual void recordTick(Tickers tickerType, uint64_t count = 0) = 0;
virtual void setTickerCount(Tickers tickerType, uint64_t count) = 0;