| The Android Open Source Project | 02fb0ac | 2009-03-03 19:30:07 -0800 | [diff] [blame] | 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 | |
| 46 | struct 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 | |
| 59 | typedef struct histogram_struct *HIST; |
| 60 | |
| 61 | /* |
| 62 | HIST_new - return a new, cleared histogram data type |
| 63 | */ |
| 64 | |
| 65 | HIST HIST_new(void); |
| 66 | |
| 67 | /* |
| 68 | HIST_clear - reset a histogram by clearing all totals to zero |
| 69 | */ |
| 70 | |
| 71 | void HIST_clear(HIST h); |
| 72 | |
| 73 | /* |
| 74 | HIST_add - add a time difference to a histogram. Time should be in |
| 75 | microseconds. |
| 76 | */ |
| 77 | |
| 78 | void 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 | |
| 85 | void HIST_report(HIST h); |
| 86 | |
| 87 | /* |
| 88 | HIST_timestamp - take a timestamp suitable for use in a histogram. |
| 89 | */ |
| 90 | |
| 91 | #ifdef HAVE_GETHRTIME |
| 92 | void HIST_timestamp(hrtime_t *timestamp); |
| 93 | #elif defined(HAVE_GET_HRT) |
| 94 | void HIST_timestamp(hrt_t *timestamp); |
| 95 | #elif defined(WIN32) |
| 96 | void HIST_timestamp(LARGE_INTEGER *timestamp); |
| 97 | #else |
| 98 | void 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 |
| 106 | int delta_micro(hrtime_t *begin, hrtime_t *end); |
| 107 | #elif defined(HAVE_GET_HRT) |
| 108 | int delta_micro(hrt_t *begin, hrt_t *end); |
| 109 | #elif defined(WIN32) |
| 110 | int delta_micro(LARGE_INTEGER *begin, LARGE_INTEGER *end); |
| 111 | #else |
| 112 | int delta_micro(struct timeval *begin, struct timeval *end); |
| 113 | #endif |
| 114 | |
| 115 | #endif |
| 116 | |