119 lines
3.3 KiB
C
119 lines
3.3 KiB
C
/*
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* Copyright (c) 2012 Travis Geiselbrecht
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files
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* (the "Software"), to deal in the Software without restriction,
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* including without limitation the rights to use, copy, modify, merge,
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* publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <stdio.h>
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#include <rand.h>
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#include <err.h>
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#include <app/tests.h>
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#include <kernel/thread.h>
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#include <kernel/mutex.h>
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#include <kernel/semaphore.h>
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#include <kernel/event.h>
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#include <platform.h>
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void clock_tests(void)
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{
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uint32_t c;
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lk_time_t t;
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lk_bigtime_t t2;
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thread_sleep(100);
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c = arch_cycle_count();
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t = current_time();
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c = arch_cycle_count() - c;
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printf("%u cycles per current_time()\n", c);
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thread_sleep(100);
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c = arch_cycle_count();
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t2 = current_time_hires();
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c = arch_cycle_count() - c;
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printf("%u cycles per current_time_hires()\n", c);
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printf("making sure time never goes backwards\n");
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{
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printf("testing current_time()\n");
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lk_time_t start = current_time();
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lk_time_t last = start;
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for (;;) {
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t = current_time();
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//printf("%lu %lu\n", last, t);
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if (TIME_LT(t, last)) {
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printf("WARNING: time ran backwards: %lu < %lu\n", t, last);
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last = t;
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continue;
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}
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last = t;
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if (last - start > 5000)
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break;
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}
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}
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{
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printf("testing current_time_hires()\n");
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lk_bigtime_t start = current_time_hires();
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lk_bigtime_t last = start;
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for (;;) {
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t2 = current_time_hires();
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//printf("%llu %llu\n", last, t2);
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if (t2 < last) {
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printf("WARNING: time ran backwards: %llu < %llu\n", t2, last);
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last = t2;
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continue;
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}
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last = t2;
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if (last - start > 5000000)
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break;
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}
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}
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printf("making sure current_time() and current_time_hires() are always the same base\n");
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{
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lk_time_t start = current_time();
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for (;;) {
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t = current_time();
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t2 = current_time_hires();
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if (t > ((t2 + 500) / 1000)) {
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printf("WARNING: current_time() ahead of current_time_hires() %lu %llu\n", t, t2);
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}
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if (t - start > 5000)
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break;
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}
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}
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printf("counting to 5, in one second intervals\n");
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for (int i = 0; i < 5; i++) {
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thread_sleep(1000);
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printf("%d\n", i + 1);
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}
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printf("measuring cpu clock against current_time_hires()\n");
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for (int i = 0; i < 5; i++) {
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uint cycles = arch_cycle_count();
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lk_bigtime_t start = current_time_hires();
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while ((current_time_hires() - start) < 1000000)
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;
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cycles = arch_cycle_count() - cycles;
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printf("%u cycles per second\n", cycles);
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}
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}
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// vim: set noexpandtab:
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