Tristan Matthews | 0a329cc | 2013-07-17 13:20:14 -0400 | [diff] [blame] | 1 | /* $Id$ */ |
| 2 | /* |
| 3 | * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com) |
| 4 | * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | */ |
| 20 | #include "test.h" |
| 21 | #include <pj/os.h> |
| 22 | #include <pj/log.h> |
| 23 | #include <pj/rand.h> |
| 24 | |
| 25 | |
| 26 | /** |
| 27 | * \page page_pjlib_timestamp_test Test: Timestamp |
| 28 | * |
| 29 | * This file provides implementation of timestamp_test() |
| 30 | * |
| 31 | * \section timestamp_test_sec Scope of the Test |
| 32 | * |
| 33 | * This tests whether timestamp API works. |
| 34 | * |
| 35 | * API tested: |
| 36 | * - pj_get_timestamp_freq() |
| 37 | * - pj_get_timestamp() |
| 38 | * - pj_elapsed_usec() |
| 39 | * - PJ_LOG() |
| 40 | * |
| 41 | * |
| 42 | * This file is <b>pjlib-test/timestamp.c</b> |
| 43 | * |
| 44 | * \include pjlib-test/timestamp.c |
| 45 | */ |
| 46 | |
| 47 | #if INCLUDE_TIMESTAMP_TEST |
| 48 | |
| 49 | #define THIS_FILE "timestamp" |
| 50 | |
| 51 | static int timestamp_accuracy() |
| 52 | { |
| 53 | pj_timestamp freq, t1, t2; |
| 54 | pj_time_val tv1, tv2, tvtmp; |
| 55 | pj_int64_t msec, tics; |
| 56 | pj_int64_t diff; |
| 57 | |
| 58 | PJ_LOG(3,(THIS_FILE, "...testing frequency accuracy (pls wait)")); |
| 59 | |
| 60 | pj_get_timestamp_freq(&freq); |
| 61 | |
| 62 | /* Get the start time */ |
| 63 | pj_gettimeofday(&tvtmp); |
| 64 | do { |
| 65 | pj_gettimeofday(&tv1); |
| 66 | } while (PJ_TIME_VAL_EQ(tvtmp, tv1)); |
| 67 | pj_get_timestamp(&t1); |
| 68 | |
| 69 | /* Sleep for 10 seconds */ |
| 70 | pj_thread_sleep(10000); |
| 71 | |
| 72 | /* Get end time */ |
| 73 | pj_gettimeofday(&tvtmp); |
| 74 | do { |
| 75 | pj_gettimeofday(&tv2); |
| 76 | } while (PJ_TIME_VAL_EQ(tvtmp, tv2)); |
| 77 | pj_get_timestamp(&t2); |
| 78 | |
| 79 | /* Get the elapsed time */ |
| 80 | PJ_TIME_VAL_SUB(tv2, tv1); |
| 81 | msec = PJ_TIME_VAL_MSEC(tv2); |
| 82 | |
| 83 | /* Check that the frequency match the elapsed time */ |
| 84 | tics = t2.u64 - t1.u64; |
| 85 | diff = tics - (msec * freq.u64 / 1000); |
| 86 | if (diff < 0) |
| 87 | diff = -diff; |
| 88 | |
| 89 | /* Only allow 1 msec mismatch */ |
| 90 | if (diff > (pj_int64_t)(freq.u64 / 1000)) { |
| 91 | PJ_LOG(3,(THIS_FILE, "....error: timestamp drifted by %d usec after " |
| 92 | "%d msec", |
| 93 | (pj_uint32_t)(diff * 1000000 / freq.u64), |
| 94 | msec)); |
| 95 | return -2000; |
| 96 | |
| 97 | /* Otherwise just print warning if timestamp drifted by >1 usec */ |
| 98 | } else if (diff > (pj_int64_t)(freq.u64 / 1000000)) { |
| 99 | PJ_LOG(3,(THIS_FILE, "....warning: timestamp drifted by %d usec after " |
| 100 | "%d msec", |
| 101 | (pj_uint32_t)(diff * 1000000 / freq.u64), |
| 102 | msec)); |
| 103 | } else { |
| 104 | PJ_LOG(3,(THIS_FILE, "....good. Timestamp is accurate down to" |
| 105 | " nearest usec.")); |
| 106 | } |
| 107 | |
| 108 | return 0; |
| 109 | } |
| 110 | |
| 111 | |
| 112 | int timestamp_test(void) |
| 113 | { |
| 114 | enum { CONSECUTIVE_LOOP = 100 }; |
| 115 | volatile unsigned i; |
| 116 | pj_timestamp freq, t1, t2; |
| 117 | pj_time_val tv1, tv2; |
| 118 | unsigned elapsed; |
| 119 | pj_status_t rc; |
| 120 | |
| 121 | PJ_LOG(3,(THIS_FILE, "...Testing timestamp (high res time)")); |
| 122 | |
| 123 | /* Get and display timestamp frequency. */ |
| 124 | if ((rc=pj_get_timestamp_freq(&freq)) != PJ_SUCCESS) { |
| 125 | app_perror("...ERROR: get timestamp freq", rc); |
| 126 | return -1000; |
| 127 | } |
| 128 | |
| 129 | PJ_LOG(3,(THIS_FILE, "....frequency: hiword=%lu loword=%lu", |
| 130 | freq.u32.hi, freq.u32.lo)); |
| 131 | |
| 132 | PJ_LOG(3,(THIS_FILE, "...checking if time can run backwards (pls wait)..")); |
| 133 | |
| 134 | /* |
| 135 | * Check if consecutive readings should yield timestamp value |
| 136 | * that is bigger than previous value. |
| 137 | * First we get the first timestamp. |
| 138 | */ |
| 139 | rc = pj_get_timestamp(&t1); |
| 140 | if (rc != PJ_SUCCESS) { |
| 141 | app_perror("...ERROR: pj_get_timestamp", rc); |
| 142 | return -1001; |
| 143 | } |
| 144 | rc = pj_gettimeofday(&tv1); |
| 145 | if (rc != PJ_SUCCESS) { |
| 146 | app_perror("...ERROR: pj_gettimeofday", rc); |
| 147 | return -1002; |
| 148 | } |
| 149 | for (i=0; i<CONSECUTIVE_LOOP; ++i) { |
| 150 | |
| 151 | pj_thread_sleep(pj_rand() % 100); |
| 152 | |
| 153 | rc = pj_get_timestamp(&t2); |
| 154 | if (rc != PJ_SUCCESS) { |
| 155 | app_perror("...ERROR: pj_get_timestamp", rc); |
| 156 | return -1003; |
| 157 | } |
| 158 | rc = pj_gettimeofday(&tv2); |
| 159 | if (rc != PJ_SUCCESS) { |
| 160 | app_perror("...ERROR: pj_gettimeofday", rc); |
| 161 | return -1004; |
| 162 | } |
| 163 | |
| 164 | /* compare t2 with t1, expecting t2 >= t1. */ |
| 165 | if (t2.u32.hi < t1.u32.hi || |
| 166 | (t2.u32.hi == t1.u32.hi && t2.u32.lo < t1.u32.lo)) |
| 167 | { |
| 168 | PJ_LOG(3,(THIS_FILE, "...ERROR: timestamp run backwards!")); |
| 169 | return -1005; |
| 170 | } |
| 171 | |
| 172 | /* compare tv2 with tv1, expecting tv2 >= tv1. */ |
| 173 | if (PJ_TIME_VAL_LT(tv2, tv1)) { |
| 174 | PJ_LOG(3,(THIS_FILE, "...ERROR: time run backwards!")); |
| 175 | return -1006; |
| 176 | } |
| 177 | } |
| 178 | |
| 179 | /* |
| 180 | * Simple test to time some loop. |
| 181 | */ |
| 182 | PJ_LOG(3,(THIS_FILE, "....testing simple 1000000 loop")); |
| 183 | |
| 184 | |
| 185 | /* Mark start time. */ |
| 186 | if ((rc=pj_get_timestamp(&t1)) != PJ_SUCCESS) { |
| 187 | app_perror("....error: cat't get timestamp", rc); |
| 188 | return -1010; |
| 189 | } |
| 190 | |
| 191 | /* Loop.. */ |
| 192 | for (i=0; i<1000000; ++i) { |
| 193 | /* Try to do something so that smart compilers wont |
| 194 | * remove this silly loop. |
| 195 | */ |
| 196 | null_func(); |
| 197 | } |
| 198 | |
| 199 | pj_thread_sleep(0); |
| 200 | |
| 201 | /* Mark end time. */ |
| 202 | pj_get_timestamp(&t2); |
| 203 | |
| 204 | /* Get elapsed time in usec. */ |
| 205 | elapsed = pj_elapsed_usec(&t1, &t2); |
| 206 | PJ_LOG(3,(THIS_FILE, "....elapsed: %u usec", (unsigned)elapsed)); |
| 207 | |
| 208 | /* See if elapsed time is "reasonable". |
| 209 | * This should be good even on 50Mhz embedded powerpc. |
| 210 | */ |
| 211 | if (elapsed < 1 || elapsed > 1000000) { |
| 212 | PJ_LOG(3,(THIS_FILE, "....error: elapsed time outside window (%u, " |
| 213 | "t1.u32.hi=%u, t1.u32.lo=%u, " |
| 214 | "t2.u32.hi=%u, t2.u32.lo=%u)", |
| 215 | elapsed, |
| 216 | t1.u32.hi, t1.u32.lo, t2.u32.hi, t2.u32.lo)); |
| 217 | return -1030; |
| 218 | } |
| 219 | |
| 220 | /* Testing time/timestamp accuracy */ |
| 221 | rc = timestamp_accuracy(); |
| 222 | if (rc != 0) |
| 223 | return rc; |
| 224 | |
| 225 | return 0; |
| 226 | } |
| 227 | |
| 228 | |
| 229 | #else |
| 230 | /* To prevent warning about "translation unit is empty" |
| 231 | * when this test is disabled. |
| 232 | */ |
| 233 | int dummy_timestamp_test; |
| 234 | #endif /* INCLUDE_TIMESTAMP_TEST */ |
| 235 | |