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Diffstat (limited to 'pjlib/src/pjlib-test/timestamp.c')
| -rw-r--r-- | pjlib/src/pjlib-test/timestamp.c | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/pjlib/src/pjlib-test/timestamp.c b/pjlib/src/pjlib-test/timestamp.c new file mode 100644 index 0000000..3b04000 --- /dev/null +++ b/pjlib/src/pjlib-test/timestamp.c @@ -0,0 +1,235 @@ +/* $Id: timestamp.c 3553 2011-05-05 06:14:19Z nanang $ */ +/* + * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com) + * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ +#include "test.h" +#include <pj/os.h> +#include <pj/log.h> +#include <pj/rand.h> + + +/** + * \page page_pjlib_timestamp_test Test: Timestamp + * + * This file provides implementation of timestamp_test() + * + * \section timestamp_test_sec Scope of the Test + * + * This tests whether timestamp API works. + * + * API tested: + * - pj_get_timestamp_freq() + * - pj_get_timestamp() + * - pj_elapsed_usec() + * - PJ_LOG() + * + * + * This file is <b>pjlib-test/timestamp.c</b> + * + * \include pjlib-test/timestamp.c + */ + +#if INCLUDE_TIMESTAMP_TEST + +#define THIS_FILE "timestamp" + +static int timestamp_accuracy() +{ + pj_timestamp freq, t1, t2; + pj_time_val tv1, tv2, tvtmp; + pj_int64_t msec, tics; + pj_int64_t diff; + + PJ_LOG(3,(THIS_FILE, "...testing frequency accuracy (pls wait)")); + + pj_get_timestamp_freq(&freq); + + /* Get the start time */ + pj_gettimeofday(&tvtmp); + do { + pj_gettimeofday(&tv1); + } while (PJ_TIME_VAL_EQ(tvtmp, tv1)); + pj_get_timestamp(&t1); + + /* Sleep for 10 seconds */ + pj_thread_sleep(10000); + + /* Get end time */ + pj_gettimeofday(&tvtmp); + do { + pj_gettimeofday(&tv2); + } while (PJ_TIME_VAL_EQ(tvtmp, tv2)); + pj_get_timestamp(&t2); + + /* Get the elapsed time */ + PJ_TIME_VAL_SUB(tv2, tv1); + msec = PJ_TIME_VAL_MSEC(tv2); + + /* Check that the frequency match the elapsed time */ + tics = t2.u64 - t1.u64; + diff = tics - (msec * freq.u64 / 1000); + if (diff < 0) + diff = -diff; + + /* Only allow 1 msec mismatch */ + if (diff > (pj_int64_t)(freq.u64 / 1000)) { + PJ_LOG(3,(THIS_FILE, "....error: timestamp drifted by %d usec after " + "%d msec", + (pj_uint32_t)(diff * 1000000 / freq.u64), + msec)); + return -2000; + + /* Otherwise just print warning if timestamp drifted by >1 usec */ + } else if (diff > (pj_int64_t)(freq.u64 / 1000000)) { + PJ_LOG(3,(THIS_FILE, "....warning: timestamp drifted by %d usec after " + "%d msec", + (pj_uint32_t)(diff * 1000000 / freq.u64), + msec)); + } else { + PJ_LOG(3,(THIS_FILE, "....good. Timestamp is accurate down to" + " nearest usec.")); + } + + return 0; +} + + +int timestamp_test(void) +{ + enum { CONSECUTIVE_LOOP = 100 }; + volatile unsigned i; + pj_timestamp freq, t1, t2; + pj_time_val tv1, tv2; + unsigned elapsed; + pj_status_t rc; + + PJ_LOG(3,(THIS_FILE, "...Testing timestamp (high res time)")); + + /* Get and display timestamp frequency. */ + if ((rc=pj_get_timestamp_freq(&freq)) != PJ_SUCCESS) { + app_perror("...ERROR: get timestamp freq", rc); + return -1000; + } + + PJ_LOG(3,(THIS_FILE, "....frequency: hiword=%lu loword=%lu", + freq.u32.hi, freq.u32.lo)); + + PJ_LOG(3,(THIS_FILE, "...checking if time can run backwards (pls wait)..")); + + /* + * Check if consecutive readings should yield timestamp value + * that is bigger than previous value. + * First we get the first timestamp. + */ + rc = pj_get_timestamp(&t1); + if (rc != PJ_SUCCESS) { + app_perror("...ERROR: pj_get_timestamp", rc); + return -1001; + } + rc = pj_gettimeofday(&tv1); + if (rc != PJ_SUCCESS) { + app_perror("...ERROR: pj_gettimeofday", rc); + return -1002; + } + for (i=0; i<CONSECUTIVE_LOOP; ++i) { + + pj_thread_sleep(pj_rand() % 100); + + rc = pj_get_timestamp(&t2); + if (rc != PJ_SUCCESS) { + app_perror("...ERROR: pj_get_timestamp", rc); + return -1003; + } + rc = pj_gettimeofday(&tv2); + if (rc != PJ_SUCCESS) { + app_perror("...ERROR: pj_gettimeofday", rc); + return -1004; + } + + /* compare t2 with t1, expecting t2 >= t1. */ + if (t2.u32.hi < t1.u32.hi || + (t2.u32.hi == t1.u32.hi && t2.u32.lo < t1.u32.lo)) + { + PJ_LOG(3,(THIS_FILE, "...ERROR: timestamp run backwards!")); + return -1005; + } + + /* compare tv2 with tv1, expecting tv2 >= tv1. */ + if (PJ_TIME_VAL_LT(tv2, tv1)) { + PJ_LOG(3,(THIS_FILE, "...ERROR: time run backwards!")); + return -1006; + } + } + + /* + * Simple test to time some loop. + */ + PJ_LOG(3,(THIS_FILE, "....testing simple 1000000 loop")); + + + /* Mark start time. */ + if ((rc=pj_get_timestamp(&t1)) != PJ_SUCCESS) { + app_perror("....error: cat't get timestamp", rc); + return -1010; + } + + /* Loop.. */ + for (i=0; i<1000000; ++i) { + /* Try to do something so that smart compilers wont + * remove this silly loop. + */ + null_func(); + } + + pj_thread_sleep(0); + + /* Mark end time. */ + pj_get_timestamp(&t2); + + /* Get elapsed time in usec. */ + elapsed = pj_elapsed_usec(&t1, &t2); + PJ_LOG(3,(THIS_FILE, "....elapsed: %u usec", (unsigned)elapsed)); + + /* See if elapsed time is "reasonable". + * This should be good even on 50Mhz embedded powerpc. + */ + if (elapsed < 1 || elapsed > 1000000) { + PJ_LOG(3,(THIS_FILE, "....error: elapsed time outside window (%u, " + "t1.u32.hi=%u, t1.u32.lo=%u, " + "t2.u32.hi=%u, t2.u32.lo=%u)", + elapsed, + t1.u32.hi, t1.u32.lo, t2.u32.hi, t2.u32.lo)); + return -1030; + } + + /* Testing time/timestamp accuracy */ + rc = timestamp_accuracy(); + if (rc != 0) + return rc; + + return 0; +} + + +#else +/* To prevent warning about "translation unit is empty" + * when this test is disabled. + */ +int dummy_timestamp_test; +#endif /* INCLUDE_TIMESTAMP_TEST */ + |