qemu/tests/test-timed-average.c
Claudio Fontana 740b175973 cpu-timers, icount: new modules
refactoring of cpus.c continues with cpu timer state extraction.

cpu-timers: responsible for the softmmu cpu timers state,
            including cpu clocks and ticks.

icount: counts the TCG instructions executed. As such it is specific to
the TCG accelerator. Therefore, it is built only under CONFIG_TCG.

One complication is due to qtest, which uses an icount field to warp time
as part of qtest (qtest_clock_warp).

In order to solve this problem, provide a separate counter for qtest.

This requires fixing assumptions scattered in the code that
qtest_enabled() implies icount_enabled(), checking each specific case.

Signed-off-by: Claudio Fontana <cfontana@suse.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
[remove redundant initialization with qemu_spice_init]
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
[fix lingering calls to icount_get]
Signed-off-by: Claudio Fontana <cfontana@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-10-05 16:41:22 +02:00

90 lines
2.2 KiB
C

/*
* 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 "sysemu/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();
}