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/*
* Timed average computation tests
*
* Copyright Nodalink, EURL. 2014
*
* Authors:
* Benoît Canet <benoit.canet@nodalink.com>
*
* This work is licensed under the terms of the GNU LGPL, version 2 or later.
* See the COPYING.LIB file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "system/cpu-timers.h"
#include "qemu/timed-average.h"
/* This is the clock for QEMU_CLOCK_VIRTUAL */
static int64_t my_clock_value;
int64_t cpu_get_clock(void)
{
return my_clock_value;
}
static void account(TimedAverage *ta)
{
timed_average_account(ta, 1);
timed_average_account(ta, 5);
timed_average_account(ta, 2);
timed_average_account(ta, 4);
timed_average_account(ta, 3);
}
static void test_average(void)
{
TimedAverage ta;
uint64_t result;
int i;
/* we will compute some average on a period of 1 second */
timed_average_init(&ta, QEMU_CLOCK_VIRTUAL, NANOSECONDS_PER_SECOND);
result = timed_average_min(&ta);
g_assert(result == 0);
result = timed_average_avg(&ta);
g_assert(result == 0);
result = timed_average_max(&ta);
g_assert(result == 0);
for (i = 0; i < 100; i++) {
account(&ta);
result = timed_average_min(&ta);
g_assert(result == 1);
result = timed_average_avg(&ta);
g_assert(result == 3);
result = timed_average_max(&ta);
g_assert(result == 5);
my_clock_value += NANOSECONDS_PER_SECOND / 10;
}
my_clock_value += NANOSECONDS_PER_SECOND * 100;
result = timed_average_min(&ta);
g_assert(result == 0);
result = timed_average_avg(&ta);
g_assert(result == 0);
result = timed_average_max(&ta);
g_assert(result == 0);
for (i = 0; i < 100; i++) {
account(&ta);
result = timed_average_min(&ta);
g_assert(result == 1);
result = timed_average_avg(&ta);
g_assert(result == 3);
result = timed_average_max(&ta);
g_assert(result == 5);
my_clock_value += NANOSECONDS_PER_SECOND / 10;
}
}
int main(int argc, char **argv)
{
/* tests in the same order as the header function declarations */
g_test_init(&argc, &argv, NULL);
g_test_add_func("/timed-average/average", test_average);
return g_test_run();
}
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