1#if TIME_WITH_SYS_TIME
2# include <sys/time.h>
3# include <time.h>
4#else
5# if HAVE_SYS_TIME_H
6#  include <sys/time.h>
7# else
8#  include <time.h>
9# endif
10#endif
11
12/* hist.h
13
14   Given a time difference in microseconds, increment one of 61
15   different buckets:
16
17   0 - 9 in increments of 1 usec
18   0 - 9 in increments of 10 usecs
19   0 - 9 in increments of 100 usecs
20   0 - 9 in increments of 1 msec
21   0 - 9 in increments of 10 msecs
22   0 - 9 in increments of 100 msecs
23   0 - 9 in increments of 1 sec
24   0 - 9 in increments of 10 sec
25   > 100 secs
26
27   This will allow any time to be recorded to within an accuracy of
28   10%, and provides a compact representation for capturing the
29   distribution of a large number of time differences (e.g.
30   request-response latencies).
31
32   Colin Low  10/6/93
33   Rick Jones 2004-06-15 - extend to 1 and 10 usec
34*/
35#ifndef _HIST_INCLUDED
36#define _HIST_INCLUDED
37
38#ifdef IRIX
39#include <sys/time.h>
40#endif /* IRIX */
41
42#if defined(HAVE_GET_HRT)
43#include "hrt.h"
44#endif
45
46struct histogram_struct {
47  int unit_usec[10];
48  int ten_usec[10];
49  int hundred_usec[10];
50  int unit_msec[10];
51  int ten_msec[10];
52  int hundred_msec[10];
53  int unit_sec[10];
54  int ten_sec[10];
55  int ridiculous;
56  int total;
57};
58
59typedef struct histogram_struct *HIST;
60
61/*
62   HIST_new - return a new, cleared histogram data type
63*/
64
65HIST HIST_new(void);
66
67/*
68   HIST_clear - reset a histogram by clearing all totals to zero
69*/
70
71void HIST_clear(HIST h);
72
73/*
74   HIST_add - add a time difference to a histogram. Time should be in
75   microseconds.
76*/
77
78void HIST_add(register HIST h, int time_delta);
79
80/*
81  HIST_report - create an ASCII report on the contents of a histogram.
82  Currently printsto standard out
83*/
84
85void HIST_report(HIST h);
86
87/*
88  HIST_timestamp - take a timestamp suitable for use in a histogram.
89*/
90
91#ifdef HAVE_GETHRTIME
92void HIST_timestamp(hrtime_t *timestamp);
93#elif defined(HAVE_GET_HRT)
94void HIST_timestamp(hrt_t *timestamp);
95#elif defined(WIN32)
96void HIST_timestamp(LARGE_INTEGER *timestamp);
97#else
98void HIST_timestamp(struct timeval *timestamp);
99#endif
100
101/*
102  delta_micro - calculate the difference in microseconds between two
103  timestamps
104*/
105#ifdef HAVE_GETHRTIME
106int delta_micro(hrtime_t *begin, hrtime_t *end);
107#elif defined(HAVE_GET_HRT)
108int delta_micro(hrt_t *begin, hrt_t *end);
109#elif defined(WIN32)
110int delta_micro(LARGE_INTEGER *begin, LARGE_INTEGER *end);
111#else
112int delta_micro(struct timeval *begin, struct timeval *end);
113#endif
114
115#endif
116
117