Jens Axboe | 02bcaa8 | 2006-11-24 10:42:00 +0100 | [diff] [blame] | 1 | /* |
Jens Axboe | f5cc024 | 2006-11-24 10:47:40 +0100 | [diff] [blame] | 2 | * Clock functions |
Jens Axboe | 02bcaa8 | 2006-11-24 10:42:00 +0100 | [diff] [blame] | 3 | */ |
Jens Axboe | f5cc024 | 2006-11-24 10:47:40 +0100 | [diff] [blame] | 4 | |
Jens Axboe | 02bcaa8 | 2006-11-24 10:42:00 +0100 | [diff] [blame] | 5 | #include <unistd.h> |
Jens Axboe | c223da8 | 2010-03-24 13:23:53 +0100 | [diff] [blame] | 6 | #include <math.h> |
Jens Axboe | 02bcaa8 | 2006-11-24 10:42:00 +0100 | [diff] [blame] | 7 | #include <sys/time.h> |
Bruce Cran | 03e20d6 | 2011-01-02 20:14:54 +0100 | [diff] [blame] | 8 | #include <time.h> |
Jens Axboe | 02bcaa8 | 2006-11-24 10:42:00 +0100 | [diff] [blame] | 9 | |
| 10 | #include "fio.h" |
Jens Axboe | be4ecfd | 2008-12-08 14:10:52 +0100 | [diff] [blame] | 11 | #include "smalloc.h" |
Jens Axboe | 02bcaa8 | 2006-11-24 10:42:00 +0100 | [diff] [blame] | 12 | |
| 13 | #include "hash.h" |
Jens Axboe | 7d11f87 | 2012-12-17 12:03:29 +0100 | [diff] [blame] | 14 | #include "os/os.h" |
Jens Axboe | 02bcaa8 | 2006-11-24 10:42:00 +0100 | [diff] [blame] | 15 | |
Christian Ehrhardt | 919e789 | 2014-04-08 17:52:00 +0200 | [diff] [blame] | 16 | #if defined(ARCH_HAVE_CPU_CLOCK) && !defined(ARCH_CPU_CLOCK_CYCLES_PER_USEC) |
Jens Axboe | c223da8 | 2010-03-24 13:23:53 +0100 | [diff] [blame] | 17 | static unsigned long cycles_per_usec; |
Jens Axboe | 7133911 | 2012-12-21 22:54:56 +0100 | [diff] [blame] | 18 | static unsigned long inv_cycles_per_usec; |
Jens Axboe | 400531d | 2014-12-16 22:40:37 -0700 | [diff] [blame] | 19 | static uint64_t max_cycles_for_mult; |
Christian Ehrhardt | bbc1f06 | 2015-02-27 08:20:46 -0700 | [diff] [blame] | 20 | #endif |
| 21 | #ifdef ARCH_CPU_CLOCK_WRAPS |
Jens Axboe | 1e62c3f | 2014-12-17 08:51:23 -0700 | [diff] [blame] | 22 | static unsigned long long cycles_start, cycles_wrap; |
Jens Axboe | 09a3240 | 2010-08-15 15:01:51 -0400 | [diff] [blame] | 23 | #endif |
Jens Axboe | 4de98eb | 2013-01-01 10:59:04 +0100 | [diff] [blame] | 24 | int tsc_reliable = 0; |
Jens Axboe | 5d87939 | 2012-12-18 09:12:27 +0100 | [diff] [blame] | 25 | |
| 26 | struct tv_valid { |
Jens Axboe | ba458c2 | 2013-01-21 05:38:22 -0700 | [diff] [blame] | 27 | uint64_t last_cycles; |
Jens Axboe | 02c7e29 | 2014-12-16 15:37:25 -0700 | [diff] [blame] | 28 | int last_tv_valid; |
| 29 | int warned; |
Jens Axboe | 5d87939 | 2012-12-18 09:12:27 +0100 | [diff] [blame] | 30 | }; |
Jens Axboe | d8fc0cd | 2014-12-17 09:08:01 -0700 | [diff] [blame] | 31 | #ifdef ARCH_HAVE_CPU_CLOCK |
Jens Axboe | 67bf982 | 2013-01-10 11:23:19 +0100 | [diff] [blame] | 32 | #ifdef CONFIG_TLS_THREAD |
Jens Axboe | b4ea84d | 2013-04-11 14:20:33 +0200 | [diff] [blame] | 33 | static __thread struct tv_valid static_tv_valid; |
Jens Axboe | 67bf982 | 2013-01-10 11:23:19 +0100 | [diff] [blame] | 34 | #else |
Jens Axboe | 5d87939 | 2012-12-18 09:12:27 +0100 | [diff] [blame] | 35 | static pthread_key_t tv_tls_key; |
Jens Axboe | 67bf982 | 2013-01-10 11:23:19 +0100 | [diff] [blame] | 36 | #endif |
Jens Axboe | d8fc0cd | 2014-12-17 09:08:01 -0700 | [diff] [blame] | 37 | #endif |
Jens Axboe | 02bcaa8 | 2006-11-24 10:42:00 +0100 | [diff] [blame] | 38 | |
Bruce Cran | 16de1bf | 2012-02-20 17:07:32 +0000 | [diff] [blame] | 39 | enum fio_cs fio_clock_source = FIO_PREFERRED_CLOCK_SOURCE; |
Jens Axboe | fa80fea | 2012-12-09 20:29:00 +0100 | [diff] [blame] | 40 | int fio_clock_source_set = 0; |
Jens Axboe | 10aa136 | 2014-04-01 21:10:36 -0600 | [diff] [blame] | 41 | static enum fio_cs fio_clock_source_inited = CS_INVAL; |
Jens Axboe | c223da8 | 2010-03-24 13:23:53 +0100 | [diff] [blame] | 42 | |
Jens Axboe | 02bcaa8 | 2006-11-24 10:42:00 +0100 | [diff] [blame] | 43 | #ifdef FIO_DEBUG_TIME |
| 44 | |
| 45 | #define HASH_BITS 8 |
| 46 | #define HASH_SIZE (1 << HASH_BITS) |
| 47 | |
Jens Axboe | 01743ee | 2008-06-02 12:19:19 +0200 | [diff] [blame] | 48 | static struct flist_head hash[HASH_SIZE]; |
Jens Axboe | 02bcaa8 | 2006-11-24 10:42:00 +0100 | [diff] [blame] | 49 | static int gtod_inited; |
| 50 | |
| 51 | struct gtod_log { |
Jens Axboe | 01743ee | 2008-06-02 12:19:19 +0200 | [diff] [blame] | 52 | struct flist_head list; |
Jens Axboe | 02bcaa8 | 2006-11-24 10:42:00 +0100 | [diff] [blame] | 53 | void *caller; |
| 54 | unsigned long calls; |
| 55 | }; |
| 56 | |
| 57 | static struct gtod_log *find_hash(void *caller) |
| 58 | { |
| 59 | unsigned long h = hash_ptr(caller, HASH_BITS); |
Jens Axboe | 01743ee | 2008-06-02 12:19:19 +0200 | [diff] [blame] | 60 | struct flist_head *entry; |
Jens Axboe | 02bcaa8 | 2006-11-24 10:42:00 +0100 | [diff] [blame] | 61 | |
Jens Axboe | 01743ee | 2008-06-02 12:19:19 +0200 | [diff] [blame] | 62 | flist_for_each(entry, &hash[h]) { |
| 63 | struct gtod_log *log = flist_entry(entry, struct gtod_log, |
| 64 | list); |
Jens Axboe | 02bcaa8 | 2006-11-24 10:42:00 +0100 | [diff] [blame] | 65 | |
| 66 | if (log->caller == caller) |
| 67 | return log; |
| 68 | } |
| 69 | |
| 70 | return NULL; |
| 71 | } |
| 72 | |
Jens Axboe | 5194e34 | 2014-12-16 23:03:54 -0700 | [diff] [blame] | 73 | static void inc_caller(void *caller) |
Jens Axboe | 02bcaa8 | 2006-11-24 10:42:00 +0100 | [diff] [blame] | 74 | { |
| 75 | struct gtod_log *log = find_hash(caller); |
| 76 | |
| 77 | if (!log) { |
| 78 | unsigned long h; |
| 79 | |
| 80 | log = malloc(sizeof(*log)); |
Jens Axboe | 01743ee | 2008-06-02 12:19:19 +0200 | [diff] [blame] | 81 | INIT_FLIST_HEAD(&log->list); |
Jens Axboe | 02bcaa8 | 2006-11-24 10:42:00 +0100 | [diff] [blame] | 82 | log->caller = caller; |
| 83 | log->calls = 0; |
| 84 | |
| 85 | h = hash_ptr(caller, HASH_BITS); |
Jens Axboe | 01743ee | 2008-06-02 12:19:19 +0200 | [diff] [blame] | 86 | flist_add_tail(&log->list, &hash[h]); |
Jens Axboe | 02bcaa8 | 2006-11-24 10:42:00 +0100 | [diff] [blame] | 87 | } |
| 88 | |
Jens Axboe | 5194e34 | 2014-12-16 23:03:54 -0700 | [diff] [blame] | 89 | log->calls++; |
Jens Axboe | 02bcaa8 | 2006-11-24 10:42:00 +0100 | [diff] [blame] | 90 | } |
| 91 | |
| 92 | static void gtod_log_caller(void *caller) |
| 93 | { |
Jens Axboe | 5194e34 | 2014-12-16 23:03:54 -0700 | [diff] [blame] | 94 | if (gtod_inited) |
| 95 | inc_caller(caller); |
Jens Axboe | 02bcaa8 | 2006-11-24 10:42:00 +0100 | [diff] [blame] | 96 | } |
| 97 | |
| 98 | static void fio_exit fio_dump_gtod(void) |
| 99 | { |
| 100 | unsigned long total_calls = 0; |
| 101 | int i; |
| 102 | |
| 103 | for (i = 0; i < HASH_SIZE; i++) { |
Jens Axboe | 01743ee | 2008-06-02 12:19:19 +0200 | [diff] [blame] | 104 | struct flist_head *entry; |
Jens Axboe | 02bcaa8 | 2006-11-24 10:42:00 +0100 | [diff] [blame] | 105 | struct gtod_log *log; |
| 106 | |
Jens Axboe | 01743ee | 2008-06-02 12:19:19 +0200 | [diff] [blame] | 107 | flist_for_each(entry, &hash[i]) { |
| 108 | log = flist_entry(entry, struct gtod_log, list); |
Jens Axboe | 02bcaa8 | 2006-11-24 10:42:00 +0100 | [diff] [blame] | 109 | |
Jens Axboe | 5ec10ea | 2008-03-06 15:42:00 +0100 | [diff] [blame] | 110 | printf("function %p, calls %lu\n", log->caller, |
| 111 | log->calls); |
Jens Axboe | 02bcaa8 | 2006-11-24 10:42:00 +0100 | [diff] [blame] | 112 | total_calls += log->calls; |
| 113 | } |
| 114 | } |
| 115 | |
| 116 | printf("Total %lu gettimeofday\n", total_calls); |
| 117 | } |
| 118 | |
| 119 | static void fio_init gtod_init(void) |
| 120 | { |
| 121 | int i; |
| 122 | |
| 123 | for (i = 0; i < HASH_SIZE; i++) |
Jens Axboe | 01743ee | 2008-06-02 12:19:19 +0200 | [diff] [blame] | 124 | INIT_FLIST_HEAD(&hash[i]); |
Jens Axboe | 02bcaa8 | 2006-11-24 10:42:00 +0100 | [diff] [blame] | 125 | |
| 126 | gtod_inited = 1; |
| 127 | } |
| 128 | |
| 129 | #endif /* FIO_DEBUG_TIME */ |
| 130 | |
Jens Axboe | 67bf982 | 2013-01-10 11:23:19 +0100 | [diff] [blame] | 131 | #ifdef CONFIG_CLOCK_GETTIME |
Jens Axboe | 9ff1c07 | 2012-12-20 15:17:57 +0100 | [diff] [blame] | 132 | static int fill_clock_gettime(struct timespec *ts) |
| 133 | { |
Jens Axboe | 67bf982 | 2013-01-10 11:23:19 +0100 | [diff] [blame] | 134 | #ifdef CONFIG_CLOCK_MONOTONIC |
Jens Axboe | 9ff1c07 | 2012-12-20 15:17:57 +0100 | [diff] [blame] | 135 | return clock_gettime(CLOCK_MONOTONIC, ts); |
| 136 | #else |
| 137 | return clock_gettime(CLOCK_REALTIME, ts); |
| 138 | #endif |
| 139 | } |
Jens Axboe | 1e97cce | 2006-12-05 11:44:16 +0100 | [diff] [blame] | 140 | #endif |
Jens Axboe | 67bf982 | 2013-01-10 11:23:19 +0100 | [diff] [blame] | 141 | |
Jens Axboe | a7d78f2 | 2014-12-16 15:13:45 -0700 | [diff] [blame] | 142 | static void __fio_gettime(struct timeval *tp) |
Jens Axboe | 02bcaa8 | 2006-11-24 10:42:00 +0100 | [diff] [blame] | 143 | { |
Jens Axboe | c223da8 | 2010-03-24 13:23:53 +0100 | [diff] [blame] | 144 | switch (fio_clock_source) { |
Jens Axboe | 67bf982 | 2013-01-10 11:23:19 +0100 | [diff] [blame] | 145 | #ifdef CONFIG_GETTIMEOFDAY |
Jens Axboe | c223da8 | 2010-03-24 13:23:53 +0100 | [diff] [blame] | 146 | case CS_GTOD: |
Jens Axboe | 02bcaa8 | 2006-11-24 10:42:00 +0100 | [diff] [blame] | 147 | gettimeofday(tp, NULL); |
Jens Axboe | c223da8 | 2010-03-24 13:23:53 +0100 | [diff] [blame] | 148 | break; |
Jens Axboe | 67bf982 | 2013-01-10 11:23:19 +0100 | [diff] [blame] | 149 | #endif |
| 150 | #ifdef CONFIG_CLOCK_GETTIME |
Jens Axboe | c223da8 | 2010-03-24 13:23:53 +0100 | [diff] [blame] | 151 | case CS_CGETTIME: { |
Jens Axboe | 02bcaa8 | 2006-11-24 10:42:00 +0100 | [diff] [blame] | 152 | struct timespec ts; |
| 153 | |
Jens Axboe | 9ff1c07 | 2012-12-20 15:17:57 +0100 | [diff] [blame] | 154 | if (fill_clock_gettime(&ts) < 0) { |
Jens Axboe | c223da8 | 2010-03-24 13:23:53 +0100 | [diff] [blame] | 155 | log_err("fio: clock_gettime fails\n"); |
| 156 | assert(0); |
Jens Axboe | 02bcaa8 | 2006-11-24 10:42:00 +0100 | [diff] [blame] | 157 | } |
| 158 | |
| 159 | tp->tv_sec = ts.tv_sec; |
| 160 | tp->tv_usec = ts.tv_nsec / 1000; |
Jens Axboe | c223da8 | 2010-03-24 13:23:53 +0100 | [diff] [blame] | 161 | break; |
| 162 | } |
Jens Axboe | 67bf982 | 2013-01-10 11:23:19 +0100 | [diff] [blame] | 163 | #endif |
Jens Axboe | c223da8 | 2010-03-24 13:23:53 +0100 | [diff] [blame] | 164 | #ifdef ARCH_HAVE_CPU_CLOCK |
| 165 | case CS_CPUCLOCK: { |
Jens Axboe | ba458c2 | 2013-01-21 05:38:22 -0700 | [diff] [blame] | 166 | uint64_t usecs, t; |
Jens Axboe | d8fc0cd | 2014-12-17 09:08:01 -0700 | [diff] [blame] | 167 | struct tv_valid *tv; |
| 168 | |
| 169 | #ifdef CONFIG_TLS_THREAD |
| 170 | tv = &static_tv_valid; |
| 171 | #else |
| 172 | tv = pthread_getspecific(tv_tls_key); |
| 173 | #endif |
Jens Axboe | c223da8 | 2010-03-24 13:23:53 +0100 | [diff] [blame] | 174 | |
| 175 | t = get_cpu_clock(); |
Christian Ehrhardt | bbc1f06 | 2015-02-27 08:20:46 -0700 | [diff] [blame] | 176 | #ifdef ARCH_CPU_CLOCK_WRAPS |
Jens Axboe | 1e62c3f | 2014-12-17 08:51:23 -0700 | [diff] [blame] | 177 | if (t < cycles_start && !cycles_wrap) |
| 178 | cycles_wrap = 1; |
Jens Axboe | d8fc0cd | 2014-12-17 09:08:01 -0700 | [diff] [blame] | 179 | else if (cycles_wrap && t >= cycles_start && !tv->warned) { |
| 180 | log_err("fio: double CPU clock wrap\n"); |
| 181 | tv->warned = 1; |
Jens Axboe | 02c7e29 | 2014-12-16 15:37:25 -0700 | [diff] [blame] | 182 | } |
Jens Axboe | c223da8 | 2010-03-24 13:23:53 +0100 | [diff] [blame] | 183 | |
Jens Axboe | 1e62c3f | 2014-12-17 08:51:23 -0700 | [diff] [blame] | 184 | t -= cycles_start; |
Christian Ehrhardt | bbc1f06 | 2015-02-27 08:20:46 -0700 | [diff] [blame] | 185 | #endif |
Jens Axboe | a7d78f2 | 2014-12-16 15:13:45 -0700 | [diff] [blame] | 186 | tv->last_cycles = t; |
| 187 | tv->last_tv_valid = 1; |
Christian Ehrhardt | 919e789 | 2014-04-08 17:52:00 +0200 | [diff] [blame] | 188 | #ifdef ARCH_CPU_CLOCK_CYCLES_PER_USEC |
| 189 | usecs = t / ARCH_CPU_CLOCK_CYCLES_PER_USEC; |
| 190 | #else |
Jens Axboe | 400531d | 2014-12-16 22:40:37 -0700 | [diff] [blame] | 191 | if (t < max_cycles_for_mult) |
| 192 | usecs = (t * inv_cycles_per_usec) / 16777216UL; |
| 193 | else |
| 194 | usecs = t / cycles_per_usec; |
Christian Ehrhardt | 919e789 | 2014-04-08 17:52:00 +0200 | [diff] [blame] | 195 | #endif |
Jens Axboe | c223da8 | 2010-03-24 13:23:53 +0100 | [diff] [blame] | 196 | tp->tv_sec = usecs / 1000000; |
| 197 | tp->tv_usec = usecs % 1000000; |
Jens Axboe | c223da8 | 2010-03-24 13:23:53 +0100 | [diff] [blame] | 198 | break; |
| 199 | } |
| 200 | #endif |
| 201 | default: |
| 202 | log_err("fio: invalid clock source %d\n", fio_clock_source); |
| 203 | break; |
Jens Axboe | 02bcaa8 | 2006-11-24 10:42:00 +0100 | [diff] [blame] | 204 | } |
Jens Axboe | 67bf982 | 2013-01-10 11:23:19 +0100 | [diff] [blame] | 205 | } |
| 206 | |
| 207 | #ifdef FIO_DEBUG_TIME |
| 208 | void fio_gettime(struct timeval *tp, void *caller) |
| 209 | #else |
| 210 | void fio_gettime(struct timeval *tp, void fio_unused *caller) |
| 211 | #endif |
| 212 | { |
Jens Axboe | 67bf982 | 2013-01-10 11:23:19 +0100 | [diff] [blame] | 213 | #ifdef FIO_DEBUG_TIME |
| 214 | if (!caller) |
| 215 | caller = __builtin_return_address(0); |
| 216 | |
| 217 | gtod_log_caller(caller); |
| 218 | #endif |
Jens Axboe | 0419419 | 2014-12-16 19:43:55 -0700 | [diff] [blame] | 219 | if (fio_unlikely(fio_gettime_offload(tp))) |
Jens Axboe | 67bf982 | 2013-01-10 11:23:19 +0100 | [diff] [blame] | 220 | return; |
Jens Axboe | 67bf982 | 2013-01-10 11:23:19 +0100 | [diff] [blame] | 221 | |
Jens Axboe | a7d78f2 | 2014-12-16 15:13:45 -0700 | [diff] [blame] | 222 | __fio_gettime(tp); |
Jens Axboe | 02bcaa8 | 2006-11-24 10:42:00 +0100 | [diff] [blame] | 223 | } |
Jens Axboe | be4ecfd | 2008-12-08 14:10:52 +0100 | [diff] [blame] | 224 | |
Christian Ehrhardt | 919e789 | 2014-04-08 17:52:00 +0200 | [diff] [blame] | 225 | #if defined(ARCH_HAVE_CPU_CLOCK) && !defined(ARCH_CPU_CLOCK_CYCLES_PER_USEC) |
Jens Axboe | c223da8 | 2010-03-24 13:23:53 +0100 | [diff] [blame] | 226 | static unsigned long get_cycles_per_usec(void) |
| 227 | { |
| 228 | struct timeval s, e; |
Jens Axboe | ba458c2 | 2013-01-21 05:38:22 -0700 | [diff] [blame] | 229 | uint64_t c_s, c_e; |
Jens Axboe | 67bf982 | 2013-01-10 11:23:19 +0100 | [diff] [blame] | 230 | enum fio_cs old_cs = fio_clock_source; |
Jens Axboe | c223da8 | 2010-03-24 13:23:53 +0100 | [diff] [blame] | 231 | |
Jens Axboe | 67bf982 | 2013-01-10 11:23:19 +0100 | [diff] [blame] | 232 | #ifdef CONFIG_CLOCK_GETTIME |
| 233 | fio_clock_source = CS_CGETTIME; |
| 234 | #else |
| 235 | fio_clock_source = CS_GTOD; |
| 236 | #endif |
| 237 | __fio_gettime(&s); |
Jens Axboe | 9ff1c07 | 2012-12-20 15:17:57 +0100 | [diff] [blame] | 238 | |
Jens Axboe | c223da8 | 2010-03-24 13:23:53 +0100 | [diff] [blame] | 239 | c_s = get_cpu_clock(); |
| 240 | do { |
Jens Axboe | ba458c2 | 2013-01-21 05:38:22 -0700 | [diff] [blame] | 241 | uint64_t elapsed; |
Jens Axboe | c223da8 | 2010-03-24 13:23:53 +0100 | [diff] [blame] | 242 | |
Jens Axboe | 67bf982 | 2013-01-10 11:23:19 +0100 | [diff] [blame] | 243 | __fio_gettime(&e); |
Jens Axboe | 9ff1c07 | 2012-12-20 15:17:57 +0100 | [diff] [blame] | 244 | |
Jens Axboe | c223da8 | 2010-03-24 13:23:53 +0100 | [diff] [blame] | 245 | elapsed = utime_since(&s, &e); |
Jens Axboe | 486332e | 2012-12-10 08:07:14 +0100 | [diff] [blame] | 246 | if (elapsed >= 1280) { |
Jens Axboe | c223da8 | 2010-03-24 13:23:53 +0100 | [diff] [blame] | 247 | c_e = get_cpu_clock(); |
| 248 | break; |
| 249 | } |
| 250 | } while (1); |
| 251 | |
Jens Axboe | 67bf982 | 2013-01-10 11:23:19 +0100 | [diff] [blame] | 252 | fio_clock_source = old_cs; |
Jens Axboe | c011000 | 2012-12-10 08:29:03 +0100 | [diff] [blame] | 253 | return (c_e - c_s + 127) >> 7; |
Jens Axboe | c223da8 | 2010-03-24 13:23:53 +0100 | [diff] [blame] | 254 | } |
| 255 | |
Jens Axboe | fa80fea | 2012-12-09 20:29:00 +0100 | [diff] [blame] | 256 | #define NR_TIME_ITERS 50 |
| 257 | |
Jens Axboe | e259879 | 2013-02-24 21:29:35 +0100 | [diff] [blame] | 258 | static int calibrate_cpu_clock(void) |
Jens Axboe | c223da8 | 2010-03-24 13:23:53 +0100 | [diff] [blame] | 259 | { |
| 260 | double delta, mean, S; |
Jens Axboe | fa52915 | 2015-01-06 09:36:25 -0700 | [diff] [blame] | 261 | uint64_t minc, maxc, avg, cycles[NR_TIME_ITERS]; |
Jens Axboe | c223da8 | 2010-03-24 13:23:53 +0100 | [diff] [blame] | 262 | int i, samples; |
| 263 | |
Jens Axboe | c223da8 | 2010-03-24 13:23:53 +0100 | [diff] [blame] | 264 | cycles[0] = get_cycles_per_usec(); |
| 265 | S = delta = mean = 0.0; |
Jens Axboe | fa80fea | 2012-12-09 20:29:00 +0100 | [diff] [blame] | 266 | for (i = 0; i < NR_TIME_ITERS; i++) { |
Jens Axboe | c223da8 | 2010-03-24 13:23:53 +0100 | [diff] [blame] | 267 | cycles[i] = get_cycles_per_usec(); |
| 268 | delta = cycles[i] - mean; |
| 269 | if (delta) { |
| 270 | mean += delta / (i + 1.0); |
| 271 | S += delta * (cycles[i] - mean); |
| 272 | } |
| 273 | } |
| 274 | |
Jens Axboe | e259879 | 2013-02-24 21:29:35 +0100 | [diff] [blame] | 275 | /* |
| 276 | * The most common platform clock breakage is returning zero |
| 277 | * indefinitely. Check for that and return failure. |
| 278 | */ |
| 279 | if (!cycles[0] && !cycles[NR_TIME_ITERS - 1]) |
| 280 | return 1; |
| 281 | |
Jens Axboe | fa80fea | 2012-12-09 20:29:00 +0100 | [diff] [blame] | 282 | S = sqrt(S / (NR_TIME_ITERS - 1.0)); |
Jens Axboe | c223da8 | 2010-03-24 13:23:53 +0100 | [diff] [blame] | 283 | |
Jens Axboe | fa52915 | 2015-01-06 09:36:25 -0700 | [diff] [blame] | 284 | minc = -1ULL; |
| 285 | maxc = samples = avg = 0; |
Jens Axboe | fa80fea | 2012-12-09 20:29:00 +0100 | [diff] [blame] | 286 | for (i = 0; i < NR_TIME_ITERS; i++) { |
Jens Axboe | c223da8 | 2010-03-24 13:23:53 +0100 | [diff] [blame] | 287 | double this = cycles[i]; |
| 288 | |
Jens Axboe | fa52915 | 2015-01-06 09:36:25 -0700 | [diff] [blame] | 289 | minc = min(cycles[i], minc); |
| 290 | maxc = max(cycles[i], maxc); |
| 291 | |
Bruce Cran | 03e20d6 | 2011-01-02 20:14:54 +0100 | [diff] [blame] | 292 | if ((fmax(this, mean) - fmin(this, mean)) > S) |
Jens Axboe | c223da8 | 2010-03-24 13:23:53 +0100 | [diff] [blame] | 293 | continue; |
| 294 | samples++; |
| 295 | avg += this; |
| 296 | } |
| 297 | |
Jens Axboe | fa80fea | 2012-12-09 20:29:00 +0100 | [diff] [blame] | 298 | S /= (double) NR_TIME_ITERS; |
Jens Axboe | 89db727 | 2012-12-10 08:29:56 +0100 | [diff] [blame] | 299 | mean /= 10.0; |
Jens Axboe | c223da8 | 2010-03-24 13:23:53 +0100 | [diff] [blame] | 300 | |
Jens Axboe | fa80fea | 2012-12-09 20:29:00 +0100 | [diff] [blame] | 301 | for (i = 0; i < NR_TIME_ITERS; i++) |
Jens Axboe | 4b91ee8 | 2013-02-25 10:18:33 +0100 | [diff] [blame] | 302 | dprint(FD_TIME, "cycles[%d]=%llu\n", i, |
| 303 | (unsigned long long) cycles[i] / 10); |
Jens Axboe | c223da8 | 2010-03-24 13:23:53 +0100 | [diff] [blame] | 304 | |
Jens Axboe | d7abad3 | 2012-12-10 10:15:59 +0100 | [diff] [blame] | 305 | avg /= samples; |
Jens Axboe | b0ff22d | 2013-01-01 13:38:18 +0100 | [diff] [blame] | 306 | avg = (avg + 5) / 10; |
Jens Axboe | fa52915 | 2015-01-06 09:36:25 -0700 | [diff] [blame] | 307 | minc /= 10; |
| 308 | maxc /= 10; |
Jens Axboe | 4b91ee8 | 2013-02-25 10:18:33 +0100 | [diff] [blame] | 309 | dprint(FD_TIME, "avg: %llu\n", (unsigned long long) avg); |
Jens Axboe | fa52915 | 2015-01-06 09:36:25 -0700 | [diff] [blame] | 310 | dprint(FD_TIME, "min=%llu, max=%llu, mean=%f, S=%f\n", |
| 311 | (unsigned long long) minc, |
| 312 | (unsigned long long) maxc, mean, S); |
Jens Axboe | c223da8 | 2010-03-24 13:23:53 +0100 | [diff] [blame] | 313 | |
| 314 | cycles_per_usec = avg; |
Jens Axboe | 7133911 | 2012-12-21 22:54:56 +0100 | [diff] [blame] | 315 | inv_cycles_per_usec = 16777216UL / cycles_per_usec; |
Jens Axboe | 400531d | 2014-12-16 22:40:37 -0700 | [diff] [blame] | 316 | max_cycles_for_mult = ~0ULL / inv_cycles_per_usec; |
Jens Axboe | 7133911 | 2012-12-21 22:54:56 +0100 | [diff] [blame] | 317 | dprint(FD_TIME, "inv_cycles_per_usec=%lu\n", inv_cycles_per_usec); |
Christian Ehrhardt | bbc1f06 | 2015-02-27 08:20:46 -0700 | [diff] [blame] | 318 | #ifdef ARCH_CPU_CLOCK_WRAPS |
Jens Axboe | 1e62c3f | 2014-12-17 08:51:23 -0700 | [diff] [blame] | 319 | cycles_start = get_cpu_clock(); |
| 320 | dprint(FD_TIME, "cycles_start=%llu\n", cycles_start); |
Christian Ehrhardt | bbc1f06 | 2015-02-27 08:20:46 -0700 | [diff] [blame] | 321 | #endif |
Jens Axboe | e259879 | 2013-02-24 21:29:35 +0100 | [diff] [blame] | 322 | return 0; |
Jens Axboe | 09a3240 | 2010-08-15 15:01:51 -0400 | [diff] [blame] | 323 | } |
| 324 | #else |
Jens Axboe | e259879 | 2013-02-24 21:29:35 +0100 | [diff] [blame] | 325 | static int calibrate_cpu_clock(void) |
Jens Axboe | 09a3240 | 2010-08-15 15:01:51 -0400 | [diff] [blame] | 326 | { |
Christian Ehrhardt | 919e789 | 2014-04-08 17:52:00 +0200 | [diff] [blame] | 327 | #ifdef ARCH_CPU_CLOCK_CYCLES_PER_USEC |
| 328 | return 0; |
| 329 | #else |
Jens Axboe | e259879 | 2013-02-24 21:29:35 +0100 | [diff] [blame] | 330 | return 1; |
Jens Axboe | 09a3240 | 2010-08-15 15:01:51 -0400 | [diff] [blame] | 331 | #endif |
Christian Ehrhardt | 919e789 | 2014-04-08 17:52:00 +0200 | [diff] [blame] | 332 | } |
| 333 | #endif // ARCH_HAVE_CPU_CLOCK |
Jens Axboe | 09a3240 | 2010-08-15 15:01:51 -0400 | [diff] [blame] | 334 | |
Jens Axboe | 67bf982 | 2013-01-10 11:23:19 +0100 | [diff] [blame] | 335 | #ifndef CONFIG_TLS_THREAD |
Jens Axboe | 5d87939 | 2012-12-18 09:12:27 +0100 | [diff] [blame] | 336 | void fio_local_clock_init(int is_thread) |
| 337 | { |
| 338 | struct tv_valid *t; |
| 339 | |
Jens Axboe | 572cfb3 | 2013-12-06 12:02:10 -0700 | [diff] [blame] | 340 | t = calloc(1, sizeof(*t)); |
Jens Axboe | a7d78f2 | 2014-12-16 15:13:45 -0700 | [diff] [blame] | 341 | if (pthread_setspecific(tv_tls_key, t)) { |
Jens Axboe | 5d87939 | 2012-12-18 09:12:27 +0100 | [diff] [blame] | 342 | log_err("fio: can't set TLS key\n"); |
Jens Axboe | a7d78f2 | 2014-12-16 15:13:45 -0700 | [diff] [blame] | 343 | assert(0); |
| 344 | } |
Jens Axboe | 5d87939 | 2012-12-18 09:12:27 +0100 | [diff] [blame] | 345 | } |
| 346 | |
| 347 | static void kill_tv_tls_key(void *data) |
| 348 | { |
| 349 | free(data); |
| 350 | } |
Jens Axboe | 67bf982 | 2013-01-10 11:23:19 +0100 | [diff] [blame] | 351 | #else |
| 352 | void fio_local_clock_init(int is_thread) |
| 353 | { |
| 354 | } |
| 355 | #endif |
Jens Axboe | 5d87939 | 2012-12-18 09:12:27 +0100 | [diff] [blame] | 356 | |
Jens Axboe | 09a3240 | 2010-08-15 15:01:51 -0400 | [diff] [blame] | 357 | void fio_clock_init(void) |
| 358 | { |
Jens Axboe | 01423ea | 2012-12-14 20:37:06 +0100 | [diff] [blame] | 359 | if (fio_clock_source == fio_clock_source_inited) |
| 360 | return; |
| 361 | |
Jens Axboe | 67bf982 | 2013-01-10 11:23:19 +0100 | [diff] [blame] | 362 | #ifndef CONFIG_TLS_THREAD |
Jens Axboe | 5d87939 | 2012-12-18 09:12:27 +0100 | [diff] [blame] | 363 | if (pthread_key_create(&tv_tls_key, kill_tv_tls_key)) |
| 364 | log_err("fio: can't create TLS key\n"); |
Jens Axboe | 67bf982 | 2013-01-10 11:23:19 +0100 | [diff] [blame] | 365 | #endif |
Jens Axboe | 5d87939 | 2012-12-18 09:12:27 +0100 | [diff] [blame] | 366 | |
Jens Axboe | 01423ea | 2012-12-14 20:37:06 +0100 | [diff] [blame] | 367 | fio_clock_source_inited = fio_clock_source; |
Jens Axboe | e259879 | 2013-02-24 21:29:35 +0100 | [diff] [blame] | 368 | |
| 369 | if (calibrate_cpu_clock()) |
| 370 | tsc_reliable = 0; |
Jens Axboe | fa80fea | 2012-12-09 20:29:00 +0100 | [diff] [blame] | 371 | |
| 372 | /* |
| 373 | * If the arch sets tsc_reliable != 0, then it must be good enough |
| 374 | * to use as THE clock source. For x86 CPUs, this means the TSC |
| 375 | * runs at a constant rate and is synced across CPU cores. |
| 376 | */ |
| 377 | if (tsc_reliable) { |
Jens Axboe | 1056413 | 2014-12-23 10:41:34 -0700 | [diff] [blame] | 378 | if (!fio_clock_source_set && !fio_monotonic_clocktest(0)) |
Jens Axboe | fa80fea | 2012-12-09 20:29:00 +0100 | [diff] [blame] | 379 | fio_clock_source = CS_CPUCLOCK; |
| 380 | } else if (fio_clock_source == CS_CPUCLOCK) |
| 381 | log_info("fio: clocksource=cpu may not be reliable\n"); |
Jens Axboe | c223da8 | 2010-03-24 13:23:53 +0100 | [diff] [blame] | 382 | } |
| 383 | |
Jens Axboe | 0cbbc39 | 2014-09-30 16:04:12 -0600 | [diff] [blame] | 384 | uint64_t utime_since(const struct timeval *s, const struct timeval *e) |
Jens Axboe | be4ecfd | 2008-12-08 14:10:52 +0100 | [diff] [blame] | 385 | { |
Jens Axboe | 39ab7da | 2012-11-06 22:10:43 +0100 | [diff] [blame] | 386 | long sec, usec; |
Jens Axboe | aa60bc5 | 2013-01-04 13:24:52 +0100 | [diff] [blame] | 387 | uint64_t ret; |
Jens Axboe | be4ecfd | 2008-12-08 14:10:52 +0100 | [diff] [blame] | 388 | |
Jens Axboe | 39ab7da | 2012-11-06 22:10:43 +0100 | [diff] [blame] | 389 | sec = e->tv_sec - s->tv_sec; |
| 390 | usec = e->tv_usec - s->tv_usec; |
| 391 | if (sec > 0 && usec < 0) { |
| 392 | sec--; |
| 393 | usec += 1000000; |
| 394 | } |
Jens Axboe | 783a3eb | 2012-02-09 10:27:10 +0100 | [diff] [blame] | 395 | |
| 396 | /* |
Jens Axboe | 39ab7da | 2012-11-06 22:10:43 +0100 | [diff] [blame] | 397 | * time warp bug on some kernels? |
Jens Axboe | 783a3eb | 2012-02-09 10:27:10 +0100 | [diff] [blame] | 398 | */ |
Jens Axboe | 39ab7da | 2012-11-06 22:10:43 +0100 | [diff] [blame] | 399 | if (sec < 0 || (sec == 0 && usec < 0)) |
| 400 | return 0; |
Jens Axboe | 783a3eb | 2012-02-09 10:27:10 +0100 | [diff] [blame] | 401 | |
Jens Axboe | 39ab7da | 2012-11-06 22:10:43 +0100 | [diff] [blame] | 402 | ret = sec * 1000000ULL + usec; |
| 403 | |
| 404 | return ret; |
Jens Axboe | 783a3eb | 2012-02-09 10:27:10 +0100 | [diff] [blame] | 405 | } |
| 406 | |
Jens Axboe | 0cbbc39 | 2014-09-30 16:04:12 -0600 | [diff] [blame] | 407 | uint64_t utime_since_now(const struct timeval *s) |
Jens Axboe | 783a3eb | 2012-02-09 10:27:10 +0100 | [diff] [blame] | 408 | { |
Jens Axboe | 39ab7da | 2012-11-06 22:10:43 +0100 | [diff] [blame] | 409 | struct timeval t; |
Jens Axboe | 783a3eb | 2012-02-09 10:27:10 +0100 | [diff] [blame] | 410 | |
Jens Axboe | 39ab7da | 2012-11-06 22:10:43 +0100 | [diff] [blame] | 411 | fio_gettime(&t, NULL); |
| 412 | return utime_since(s, &t); |
| 413 | } |
Jens Axboe | 783a3eb | 2012-02-09 10:27:10 +0100 | [diff] [blame] | 414 | |
Jens Axboe | 0cbbc39 | 2014-09-30 16:04:12 -0600 | [diff] [blame] | 415 | uint64_t mtime_since(const struct timeval *s, const struct timeval *e) |
Jens Axboe | 39ab7da | 2012-11-06 22:10:43 +0100 | [diff] [blame] | 416 | { |
| 417 | long sec, usec, ret; |
| 418 | |
| 419 | sec = e->tv_sec - s->tv_sec; |
| 420 | usec = e->tv_usec - s->tv_usec; |
| 421 | if (sec > 0 && usec < 0) { |
| 422 | sec--; |
| 423 | usec += 1000000; |
Jens Axboe | 783a3eb | 2012-02-09 10:27:10 +0100 | [diff] [blame] | 424 | } |
| 425 | |
Jens Axboe | 39ab7da | 2012-11-06 22:10:43 +0100 | [diff] [blame] | 426 | if (sec < 0 || (sec == 0 && usec < 0)) |
| 427 | return 0; |
Jens Axboe | 783a3eb | 2012-02-09 10:27:10 +0100 | [diff] [blame] | 428 | |
Jens Axboe | 39ab7da | 2012-11-06 22:10:43 +0100 | [diff] [blame] | 429 | sec *= 1000UL; |
| 430 | usec /= 1000UL; |
| 431 | ret = sec + usec; |
| 432 | |
Jens Axboe | 783a3eb | 2012-02-09 10:27:10 +0100 | [diff] [blame] | 433 | return ret; |
| 434 | } |
Jens Axboe | 39ab7da | 2012-11-06 22:10:43 +0100 | [diff] [blame] | 435 | |
Jens Axboe | 0cbbc39 | 2014-09-30 16:04:12 -0600 | [diff] [blame] | 436 | uint64_t mtime_since_now(const struct timeval *s) |
Jens Axboe | 39ab7da | 2012-11-06 22:10:43 +0100 | [diff] [blame] | 437 | { |
| 438 | struct timeval t; |
| 439 | void *p = __builtin_return_address(0); |
| 440 | |
| 441 | fio_gettime(&t, p); |
| 442 | return mtime_since(s, &t); |
| 443 | } |
| 444 | |
Jens Axboe | 0cbbc39 | 2014-09-30 16:04:12 -0600 | [diff] [blame] | 445 | uint64_t time_since_now(const struct timeval *s) |
Jens Axboe | 39ab7da | 2012-11-06 22:10:43 +0100 | [diff] [blame] | 446 | { |
| 447 | return mtime_since_now(s) / 1000; |
| 448 | } |
Jens Axboe | 7d11f87 | 2012-12-17 12:03:29 +0100 | [diff] [blame] | 449 | |
Jens Axboe | 67bf982 | 2013-01-10 11:23:19 +0100 | [diff] [blame] | 450 | #if defined(FIO_HAVE_CPU_AFFINITY) && defined(ARCH_HAVE_CPU_CLOCK) && \ |
| 451 | defined(CONFIG_SFAA) |
Jens Axboe | 7d11f87 | 2012-12-17 12:03:29 +0100 | [diff] [blame] | 452 | |
Jens Axboe | 1056413 | 2014-12-23 10:41:34 -0700 | [diff] [blame] | 453 | #define CLOCK_ENTRIES_DEBUG 100000 |
| 454 | #define CLOCK_ENTRIES_TEST 10000 |
Jens Axboe | 7d11f87 | 2012-12-17 12:03:29 +0100 | [diff] [blame] | 455 | |
| 456 | struct clock_entry { |
Jens Axboe | 58002f9 | 2013-02-25 10:23:58 +0100 | [diff] [blame] | 457 | uint32_t seq; |
| 458 | uint32_t cpu; |
Jens Axboe | ba458c2 | 2013-01-21 05:38:22 -0700 | [diff] [blame] | 459 | uint64_t tsc; |
Jens Axboe | 7d11f87 | 2012-12-17 12:03:29 +0100 | [diff] [blame] | 460 | }; |
| 461 | |
| 462 | struct clock_thread { |
| 463 | pthread_t thread; |
| 464 | int cpu; |
Jens Axboe | 1056413 | 2014-12-23 10:41:34 -0700 | [diff] [blame] | 465 | int debug; |
Jens Axboe | 7d11f87 | 2012-12-17 12:03:29 +0100 | [diff] [blame] | 466 | pthread_mutex_t lock; |
| 467 | pthread_mutex_t started; |
Jens Axboe | 1056413 | 2014-12-23 10:41:34 -0700 | [diff] [blame] | 468 | unsigned long nr_entries; |
Jens Axboe | 58002f9 | 2013-02-25 10:23:58 +0100 | [diff] [blame] | 469 | uint32_t *seq; |
Jens Axboe | 7d11f87 | 2012-12-17 12:03:29 +0100 | [diff] [blame] | 470 | struct clock_entry *entries; |
| 471 | }; |
| 472 | |
Jens Axboe | 58002f9 | 2013-02-25 10:23:58 +0100 | [diff] [blame] | 473 | static inline uint32_t atomic32_inc_return(uint32_t *seq) |
Jens Axboe | 7d11f87 | 2012-12-17 12:03:29 +0100 | [diff] [blame] | 474 | { |
| 475 | return 1 + __sync_fetch_and_add(seq, 1); |
| 476 | } |
| 477 | |
| 478 | static void *clock_thread_fn(void *data) |
| 479 | { |
| 480 | struct clock_thread *t = data; |
| 481 | struct clock_entry *c; |
| 482 | os_cpu_mask_t cpu_mask; |
Jens Axboe | 58002f9 | 2013-02-25 10:23:58 +0100 | [diff] [blame] | 483 | uint32_t last_seq; |
Jens Axboe | 7d11f87 | 2012-12-17 12:03:29 +0100 | [diff] [blame] | 484 | int i; |
| 485 | |
Jens Axboe | 1af4be1 | 2015-01-28 14:42:10 -0700 | [diff] [blame] | 486 | if (fio_cpuset_init(&cpu_mask)) { |
Jens Axboe | aa28ce0 | 2015-01-29 08:32:28 -0800 | [diff] [blame] | 487 | int __err = errno; |
Jens Axboe | 1af4be1 | 2015-01-28 14:42:10 -0700 | [diff] [blame] | 488 | |
| 489 | log_err("clock cpuset init failed: %s\n", strerror(__err)); |
| 490 | goto err_out; |
| 491 | } |
| 492 | |
Jens Axboe | 7d11f87 | 2012-12-17 12:03:29 +0100 | [diff] [blame] | 493 | fio_cpu_set(&cpu_mask, t->cpu); |
| 494 | |
| 495 | if (fio_setaffinity(gettid(), cpu_mask) == -1) { |
Jens Axboe | 4c64ff7 | 2015-01-28 14:34:10 -0700 | [diff] [blame] | 496 | int __err = errno; |
| 497 | |
| 498 | log_err("clock setaffinity failed: %s\n", strerror(__err)); |
Jens Axboe | 1af4be1 | 2015-01-28 14:42:10 -0700 | [diff] [blame] | 499 | goto err; |
Jens Axboe | 7d11f87 | 2012-12-17 12:03:29 +0100 | [diff] [blame] | 500 | } |
| 501 | |
Jens Axboe | 7d11f87 | 2012-12-17 12:03:29 +0100 | [diff] [blame] | 502 | pthread_mutex_lock(&t->lock); |
Jens Axboe | b9b3498 | 2012-12-17 14:23:47 +0100 | [diff] [blame] | 503 | pthread_mutex_unlock(&t->started); |
Jens Axboe | 7d11f87 | 2012-12-17 12:03:29 +0100 | [diff] [blame] | 504 | |
Jens Axboe | 58002f9 | 2013-02-25 10:23:58 +0100 | [diff] [blame] | 505 | last_seq = 0; |
Jens Axboe | 7d11f87 | 2012-12-17 12:03:29 +0100 | [diff] [blame] | 506 | c = &t->entries[0]; |
Jens Axboe | 1056413 | 2014-12-23 10:41:34 -0700 | [diff] [blame] | 507 | for (i = 0; i < t->nr_entries; i++, c++) { |
Jens Axboe | 58002f9 | 2013-02-25 10:23:58 +0100 | [diff] [blame] | 508 | uint32_t seq; |
| 509 | uint64_t tsc; |
Jens Axboe | 7d11f87 | 2012-12-17 12:03:29 +0100 | [diff] [blame] | 510 | |
| 511 | c->cpu = t->cpu; |
| 512 | do { |
Jens Axboe | 58002f9 | 2013-02-25 10:23:58 +0100 | [diff] [blame] | 513 | seq = atomic32_inc_return(t->seq); |
| 514 | if (seq < last_seq) |
| 515 | break; |
Jens Axboe | 7d11f87 | 2012-12-17 12:03:29 +0100 | [diff] [blame] | 516 | tsc = get_cpu_clock(); |
| 517 | } while (seq != *t->seq); |
| 518 | |
| 519 | c->seq = seq; |
| 520 | c->tsc = tsc; |
| 521 | } |
| 522 | |
Jens Axboe | 1056413 | 2014-12-23 10:41:34 -0700 | [diff] [blame] | 523 | if (t->debug) { |
| 524 | unsigned long long clocks; |
| 525 | |
| 526 | clocks = t->entries[i - 1].tsc - t->entries[0].tsc; |
| 527 | log_info("cs: cpu%3d: %llu clocks seen\n", t->cpu, clocks); |
| 528 | } |
Jens Axboe | 58002f9 | 2013-02-25 10:23:58 +0100 | [diff] [blame] | 529 | |
Jens Axboe | e259879 | 2013-02-24 21:29:35 +0100 | [diff] [blame] | 530 | /* |
| 531 | * The most common platform clock breakage is returning zero |
| 532 | * indefinitely. Check for that and return failure. |
| 533 | */ |
Jens Axboe | 58002f9 | 2013-02-25 10:23:58 +0100 | [diff] [blame] | 534 | if (!t->entries[i - 1].tsc && !t->entries[0].tsc) |
Jens Axboe | 1af4be1 | 2015-01-28 14:42:10 -0700 | [diff] [blame] | 535 | goto err; |
Jens Axboe | e259879 | 2013-02-24 21:29:35 +0100 | [diff] [blame] | 536 | |
Jens Axboe | 90881c8 | 2015-01-29 09:23:39 -0800 | [diff] [blame] | 537 | fio_cpuset_exit(&cpu_mask); |
Jens Axboe | 7d11f87 | 2012-12-17 12:03:29 +0100 | [diff] [blame] | 538 | return NULL; |
Jens Axboe | 1af4be1 | 2015-01-28 14:42:10 -0700 | [diff] [blame] | 539 | err: |
| 540 | fio_cpuset_exit(&cpu_mask); |
| 541 | err_out: |
| 542 | return (void *) 1; |
Jens Axboe | 7d11f87 | 2012-12-17 12:03:29 +0100 | [diff] [blame] | 543 | } |
| 544 | |
| 545 | static int clock_cmp(const void *p1, const void *p2) |
| 546 | { |
| 547 | const struct clock_entry *c1 = p1; |
| 548 | const struct clock_entry *c2 = p2; |
| 549 | |
Jens Axboe | b9b3498 | 2012-12-17 14:23:47 +0100 | [diff] [blame] | 550 | if (c1->seq == c2->seq) |
| 551 | log_err("cs: bug in atomic sequence!\n"); |
| 552 | |
Jens Axboe | 7d11f87 | 2012-12-17 12:03:29 +0100 | [diff] [blame] | 553 | return c1->seq - c2->seq; |
| 554 | } |
| 555 | |
Jens Axboe | 1056413 | 2014-12-23 10:41:34 -0700 | [diff] [blame] | 556 | int fio_monotonic_clocktest(int debug) |
Jens Axboe | 7d11f87 | 2012-12-17 12:03:29 +0100 | [diff] [blame] | 557 | { |
Jens Axboe | 0f7f9a9 | 2014-11-06 09:21:10 -0700 | [diff] [blame] | 558 | struct clock_thread *cthreads; |
Jens Axboe | 7d11f87 | 2012-12-17 12:03:29 +0100 | [diff] [blame] | 559 | unsigned int nr_cpus = cpus_online(); |
| 560 | struct clock_entry *entries; |
Jens Axboe | 1056413 | 2014-12-23 10:41:34 -0700 | [diff] [blame] | 561 | unsigned long nr_entries, tentries, failed = 0; |
Bruce Cran | 80da8a8 | 2013-02-21 14:16:17 +0100 | [diff] [blame] | 562 | struct clock_entry *prev, *this; |
Jens Axboe | 58002f9 | 2013-02-25 10:23:58 +0100 | [diff] [blame] | 563 | uint32_t seq = 0; |
Jens Axboe | caa3eb1 | 2014-04-14 09:05:46 -0600 | [diff] [blame] | 564 | unsigned int i; |
Jens Axboe | 7d11f87 | 2012-12-17 12:03:29 +0100 | [diff] [blame] | 565 | |
Jens Axboe | 1056413 | 2014-12-23 10:41:34 -0700 | [diff] [blame] | 566 | if (debug) { |
| 567 | log_info("cs: reliable_tsc: %s\n", tsc_reliable ? "yes" : "no"); |
Jens Axboe | d5e3f5d | 2013-01-18 20:13:45 +0100 | [diff] [blame] | 568 | |
Jens Axboe | fc3f3e4 | 2014-09-24 09:54:24 -0600 | [diff] [blame] | 569 | #ifdef FIO_INC_DEBUG |
Jens Axboe | 1056413 | 2014-12-23 10:41:34 -0700 | [diff] [blame] | 570 | fio_debug |= 1U << FD_TIME; |
Jens Axboe | fc3f3e4 | 2014-09-24 09:54:24 -0600 | [diff] [blame] | 571 | #endif |
Jens Axboe | 1056413 | 2014-12-23 10:41:34 -0700 | [diff] [blame] | 572 | nr_entries = CLOCK_ENTRIES_DEBUG; |
| 573 | } else |
| 574 | nr_entries = CLOCK_ENTRIES_TEST; |
| 575 | |
Jens Axboe | 4f1d43c | 2012-12-17 14:29:28 +0100 | [diff] [blame] | 576 | calibrate_cpu_clock(); |
Jens Axboe | 1056413 | 2014-12-23 10:41:34 -0700 | [diff] [blame] | 577 | |
| 578 | if (debug) { |
Jens Axboe | fc3f3e4 | 2014-09-24 09:54:24 -0600 | [diff] [blame] | 579 | #ifdef FIO_INC_DEBUG |
Jens Axboe | 1056413 | 2014-12-23 10:41:34 -0700 | [diff] [blame] | 580 | fio_debug &= ~(1U << FD_TIME); |
Jens Axboe | fc3f3e4 | 2014-09-24 09:54:24 -0600 | [diff] [blame] | 581 | #endif |
Jens Axboe | 1056413 | 2014-12-23 10:41:34 -0700 | [diff] [blame] | 582 | } |
Jens Axboe | 4f1d43c | 2012-12-17 14:29:28 +0100 | [diff] [blame] | 583 | |
Jens Axboe | 0f7f9a9 | 2014-11-06 09:21:10 -0700 | [diff] [blame] | 584 | cthreads = malloc(nr_cpus * sizeof(struct clock_thread)); |
Jens Axboe | 1056413 | 2014-12-23 10:41:34 -0700 | [diff] [blame] | 585 | tentries = nr_entries * nr_cpus; |
Jens Axboe | 7d11f87 | 2012-12-17 12:03:29 +0100 | [diff] [blame] | 586 | entries = malloc(tentries * sizeof(struct clock_entry)); |
| 587 | |
Jens Axboe | 1056413 | 2014-12-23 10:41:34 -0700 | [diff] [blame] | 588 | if (debug) |
| 589 | log_info("cs: Testing %u CPUs\n", nr_cpus); |
Jens Axboe | 7d11f87 | 2012-12-17 12:03:29 +0100 | [diff] [blame] | 590 | |
| 591 | for (i = 0; i < nr_cpus; i++) { |
Jens Axboe | 0f7f9a9 | 2014-11-06 09:21:10 -0700 | [diff] [blame] | 592 | struct clock_thread *t = &cthreads[i]; |
Jens Axboe | 7d11f87 | 2012-12-17 12:03:29 +0100 | [diff] [blame] | 593 | |
| 594 | t->cpu = i; |
Jens Axboe | 1056413 | 2014-12-23 10:41:34 -0700 | [diff] [blame] | 595 | t->debug = debug; |
Jens Axboe | 7d11f87 | 2012-12-17 12:03:29 +0100 | [diff] [blame] | 596 | t->seq = &seq; |
Jens Axboe | 1056413 | 2014-12-23 10:41:34 -0700 | [diff] [blame] | 597 | t->nr_entries = nr_entries; |
| 598 | t->entries = &entries[i * nr_entries]; |
Jens Axboe | 7d11f87 | 2012-12-17 12:03:29 +0100 | [diff] [blame] | 599 | pthread_mutex_init(&t->lock, NULL); |
| 600 | pthread_mutex_init(&t->started, NULL); |
| 601 | pthread_mutex_lock(&t->lock); |
Jens Axboe | 6b0110c | 2014-04-14 12:14:17 -0600 | [diff] [blame] | 602 | if (pthread_create(&t->thread, NULL, clock_thread_fn, t)) { |
| 603 | failed++; |
| 604 | nr_cpus = i; |
| 605 | break; |
| 606 | } |
Jens Axboe | 7d11f87 | 2012-12-17 12:03:29 +0100 | [diff] [blame] | 607 | } |
| 608 | |
| 609 | for (i = 0; i < nr_cpus; i++) { |
Jens Axboe | 0f7f9a9 | 2014-11-06 09:21:10 -0700 | [diff] [blame] | 610 | struct clock_thread *t = &cthreads[i]; |
Jens Axboe | 7d11f87 | 2012-12-17 12:03:29 +0100 | [diff] [blame] | 611 | |
| 612 | pthread_mutex_lock(&t->started); |
| 613 | } |
| 614 | |
| 615 | for (i = 0; i < nr_cpus; i++) { |
Jens Axboe | 0f7f9a9 | 2014-11-06 09:21:10 -0700 | [diff] [blame] | 616 | struct clock_thread *t = &cthreads[i]; |
Jens Axboe | 7d11f87 | 2012-12-17 12:03:29 +0100 | [diff] [blame] | 617 | |
| 618 | pthread_mutex_unlock(&t->lock); |
| 619 | } |
| 620 | |
Jens Axboe | 814917b | 2014-04-14 12:20:04 -0600 | [diff] [blame] | 621 | for (i = 0; i < nr_cpus; i++) { |
Jens Axboe | 0f7f9a9 | 2014-11-06 09:21:10 -0700 | [diff] [blame] | 622 | struct clock_thread *t = &cthreads[i]; |
Jens Axboe | 7d11f87 | 2012-12-17 12:03:29 +0100 | [diff] [blame] | 623 | void *ret; |
| 624 | |
| 625 | pthread_join(t->thread, &ret); |
| 626 | if (ret) |
| 627 | failed++; |
| 628 | } |
Jens Axboe | 0f7f9a9 | 2014-11-06 09:21:10 -0700 | [diff] [blame] | 629 | free(cthreads); |
Jens Axboe | 7d11f87 | 2012-12-17 12:03:29 +0100 | [diff] [blame] | 630 | |
| 631 | if (failed) { |
Jens Axboe | 1056413 | 2014-12-23 10:41:34 -0700 | [diff] [blame] | 632 | if (debug) |
| 633 | log_err("Clocksource test: %lu threads failed\n", failed); |
Jens Axboe | 7d11f87 | 2012-12-17 12:03:29 +0100 | [diff] [blame] | 634 | goto err; |
| 635 | } |
| 636 | |
| 637 | qsort(entries, tentries, sizeof(struct clock_entry), clock_cmp); |
| 638 | |
| 639 | for (failed = i = 0; i < tentries; i++) { |
Bruce Cran | 80da8a8 | 2013-02-21 14:16:17 +0100 | [diff] [blame] | 640 | this = &entries[i]; |
Jens Axboe | 7d11f87 | 2012-12-17 12:03:29 +0100 | [diff] [blame] | 641 | |
| 642 | if (!i) { |
| 643 | prev = this; |
| 644 | continue; |
| 645 | } |
| 646 | |
| 647 | if (prev->tsc > this->tsc) { |
| 648 | uint64_t diff = prev->tsc - this->tsc; |
| 649 | |
Jens Axboe | 1056413 | 2014-12-23 10:41:34 -0700 | [diff] [blame] | 650 | if (!debug) { |
| 651 | failed++; |
| 652 | break; |
| 653 | } |
| 654 | |
Jens Axboe | 4e0a8fa | 2013-04-15 11:40:57 +0200 | [diff] [blame] | 655 | log_info("cs: CPU clock mismatch (diff=%llu):\n", |
| 656 | (unsigned long long) diff); |
| 657 | log_info("\t CPU%3u: TSC=%llu, SEQ=%u\n", prev->cpu, (unsigned long long) prev->tsc, prev->seq); |
| 658 | log_info("\t CPU%3u: TSC=%llu, SEQ=%u\n", this->cpu, (unsigned long long) this->tsc, this->seq); |
Jens Axboe | 7d11f87 | 2012-12-17 12:03:29 +0100 | [diff] [blame] | 659 | failed++; |
| 660 | } |
| 661 | |
| 662 | prev = this; |
| 663 | } |
| 664 | |
Jens Axboe | 1056413 | 2014-12-23 10:41:34 -0700 | [diff] [blame] | 665 | if (debug) { |
| 666 | if (failed) |
| 667 | log_info("cs: Failed: %lu\n", failed); |
| 668 | else |
| 669 | log_info("cs: Pass!\n"); |
| 670 | } |
Jens Axboe | 7d11f87 | 2012-12-17 12:03:29 +0100 | [diff] [blame] | 671 | err: |
| 672 | free(entries); |
| 673 | return !!failed; |
| 674 | } |
| 675 | |
| 676 | #else /* defined(FIO_HAVE_CPU_AFFINITY) && defined(ARCH_HAVE_CPU_CLOCK) */ |
| 677 | |
Jens Axboe | 1056413 | 2014-12-23 10:41:34 -0700 | [diff] [blame] | 678 | int fio_monotonic_clocktest(int debug) |
Jens Axboe | 7d11f87 | 2012-12-17 12:03:29 +0100 | [diff] [blame] | 679 | { |
Jens Axboe | 1056413 | 2014-12-23 10:41:34 -0700 | [diff] [blame] | 680 | if (debug) |
| 681 | log_info("cs: current platform does not support CPU clocks\n"); |
| 682 | return 1; |
Jens Axboe | 7d11f87 | 2012-12-17 12:03:29 +0100 | [diff] [blame] | 683 | } |
| 684 | |
| 685 | #endif |