Remove comment wrt sigaction() usage, it's deprecated
[fio.git] / gettime.c
CommitLineData
02bcaa8c 1/*
f5cc024a 2 * Clock functions
02bcaa8c 3 */
f5cc024a 4
02bcaa8c
JA
5#include <unistd.h>
6#include <sys/time.h>
7
8#include "fio.h"
02bcaa8c
JA
9
10#include "hash.h"
11
5ec10eaa 12static int clock_gettime_works;
02bcaa8c
JA
13
14#ifdef FIO_DEBUG_TIME
15
16#define HASH_BITS 8
17#define HASH_SIZE (1 << HASH_BITS)
18
01743ee1 19static struct flist_head hash[HASH_SIZE];
02bcaa8c
JA
20static int gtod_inited;
21
22struct gtod_log {
01743ee1 23 struct flist_head list;
02bcaa8c
JA
24 void *caller;
25 unsigned long calls;
26};
27
28static struct gtod_log *find_hash(void *caller)
29{
30 unsigned long h = hash_ptr(caller, HASH_BITS);
01743ee1 31 struct flist_head *entry;
02bcaa8c 32
01743ee1
JA
33 flist_for_each(entry, &hash[h]) {
34 struct gtod_log *log = flist_entry(entry, struct gtod_log,
35 list);
02bcaa8c
JA
36
37 if (log->caller == caller)
38 return log;
39 }
40
41 return NULL;
42}
43
44static struct gtod_log *find_log(void *caller)
45{
46 struct gtod_log *log = find_hash(caller);
47
48 if (!log) {
49 unsigned long h;
50
51 log = malloc(sizeof(*log));
01743ee1 52 INIT_FLIST_HEAD(&log->list);
02bcaa8c
JA
53 log->caller = caller;
54 log->calls = 0;
55
56 h = hash_ptr(caller, HASH_BITS);
01743ee1 57 flist_add_tail(&log->list, &hash[h]);
02bcaa8c
JA
58 }
59
60 return log;
61}
62
63static void gtod_log_caller(void *caller)
64{
65 if (gtod_inited) {
66 struct gtod_log *log = find_log(caller);
67
68 log->calls++;
69 }
70}
71
72static void fio_exit fio_dump_gtod(void)
73{
74 unsigned long total_calls = 0;
75 int i;
76
77 for (i = 0; i < HASH_SIZE; i++) {
01743ee1 78 struct flist_head *entry;
02bcaa8c
JA
79 struct gtod_log *log;
80
01743ee1
JA
81 flist_for_each(entry, &hash[i]) {
82 log = flist_entry(entry, struct gtod_log, list);
02bcaa8c 83
5ec10eaa
JA
84 printf("function %p, calls %lu\n", log->caller,
85 log->calls);
02bcaa8c
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86 total_calls += log->calls;
87 }
88 }
89
90 printf("Total %lu gettimeofday\n", total_calls);
91}
92
93static void fio_init gtod_init(void)
94{
95 int i;
96
97 for (i = 0; i < HASH_SIZE; i++)
01743ee1 98 INIT_FLIST_HEAD(&hash[i]);
02bcaa8c
JA
99
100 gtod_inited = 1;
101}
102
103#endif /* FIO_DEBUG_TIME */
104
1e97cce9 105#ifdef FIO_DEBUG_TIME
02bcaa8c 106void fio_gettime(struct timeval *tp, void *caller)
1e97cce9
JA
107#else
108void fio_gettime(struct timeval *tp, void fio_unused *caller)
109#endif
02bcaa8c
JA
110{
111#ifdef FIO_DEBUG_TIME
112 if (!caller)
113 caller = __builtin_return_address(0);
114
115 gtod_log_caller(caller);
02bcaa8c 116#endif
7e326f3b
JA
117 if (!clock_gettime_works) {
118gtod:
02bcaa8c 119 gettimeofday(tp, NULL);
7e326f3b 120 } else {
02bcaa8c
JA
121 struct timespec ts;
122
123 if (clock_gettime(CLOCK_MONOTONIC, &ts) < 0) {
124 clock_gettime_works = 0;
7e326f3b 125 goto gtod;
02bcaa8c
JA
126 }
127
128 tp->tv_sec = ts.tv_sec;
129 tp->tv_usec = ts.tv_nsec / 1000;
130 }
131}