CernVMFS
2.9.0

#include <statistics.h>
Public Member Functions  
Recorder (uint32_t resolution_s, uint32_t capacity_s)  
void  Tick () 
void  TickAt (uint64_t timestamp) 
uint64_t  GetNoTicks (uint32_t retrospect_s) const 
uint32_t  capacity_s () const 
uint32_t  resolution_s () const 
Private Attributes  
std::vector< uint32_t >  bins_ 
uint64_t  last_timestamp_ 
uint32_t  capacity_s_ 
uint32_t  resolution_s_ 
unsigned  no_bins_ 
Keeps track of events over time. Can be used to query the number of events between now and a point in time in the past. The time range should be smaller than capacity_s seconds. Uses a monotonic clock. Not threadsafe.
Definition at line 180 of file statistics.h.
perf::Recorder::Recorder  (  uint32_t  resolution_s, 
uint32_t  capacity_s  
) 
If necessary, capacity_s is extended to be a multiple of resolution_s
Definition at line 175 of file statistics.cc.

inline 
Definition at line 188 of file statistics.h.
uint64_t perf::Recorder::GetNoTicks  (  uint32_t  retrospect_s  )  const 

inline 
Definition at line 189 of file statistics.h.
void perf::Recorder::Tick  (  ) 
void perf::Recorder::TickAt  (  uint64_t  timestamp  ) 
Definition at line 197 of file statistics.cc.
Referenced by Tick().

private 
Records number of ticks (events) per unit of resolution. A ring buffer. Entries older than capacity_s get overwritten by new events.
Definition at line 196 of file statistics.h.
Referenced by GetNoTicks(), Recorder(), and TickAt().

private 
Time window in seconds that the recorder is supposed to remember.
Definition at line 206 of file statistics.h.
Referenced by Recorder().

private 
When the most recent tick occured.
Definition at line 201 of file statistics.h.
Referenced by GetNoTicks(), and TickAt().

private 
Shorthand for bins_.size(), constant during lifetime of the recorder.
Definition at line 216 of file statistics.h.
Referenced by GetNoTicks(), Recorder(), and TickAt().

private 
Size of the bins for the tick counters.
Definition at line 211 of file statistics.h.
Referenced by GetNoTicks(), Recorder(), and TickAt().