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mutex testcase: add a performance test

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Add a reasonable performance test for uncontended and contended cases.
This commit is contained in:
Ryan Lortie 2011-09-30 23:05:27 -04:00
parent 6ef022bbb3
commit 406f7d2b39
1 changed files with 68 additions and 0 deletions
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68
glib/tests/mutex.c
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@ -22,6 +22,8 @@
#include <glib.h>
#include <stdio.h>
static void
test_mutex1 (void)
{
@ -152,6 +154,58 @@ test_mutex5 (void)
g_assert (owners[i] == NULL);
}
#define COUNT_TO 100000000
static gboolean
do_addition (gint *value)
{
static GMutex lock = G_MUTEX_INIT;
gboolean more;
/* test performance of "good" cases (ie: short critical sections) */
g_mutex_lock (&lock);
if ((more = *value != COUNT_TO))
if (*value != -1)
(*value)++;
g_mutex_unlock (&lock);
return more;
}
static gpointer
addition_thread (gpointer value)
{
while (do_addition (value));
return NULL;
}
static void
test_mutex_perf (gconstpointer data)
{
gint n_threads = GPOINTER_TO_INT (data);
GThread *threads[THREADS];
gint64 start_time;
gdouble rate;
gint x = -1;
gint i;
for (i = 0; i < n_threads - 1; i++)
threads[i] = g_thread_create (addition_thread, &x, TRUE, NULL);
/* avoid measuring thread setup/teardown time */
start_time = g_get_monotonic_time ();
g_atomic_int_set (&x, 0);
addition_thread (&x);
g_assert_cmpint (g_atomic_int_get (&x), ==, COUNT_TO);
rate = g_get_monotonic_time () - start_time;
rate = x / rate;
for (i = 0; i < n_threads - 1; i++)
g_thread_join (threads[i]);
g_test_maximized_result (rate, "%f mips", rate);
}
int
main (int argc, char *argv[])
@ -164,5 +218,19 @@ main (int argc, char *argv[])
g_test_add_func ("/thread/mutex4", test_mutex4);
g_test_add_func ("/thread/mutex5", test_mutex5);
if (g_test_perf ())
{
gint i;
g_test_add_data_func ("/thread/mutex/perf/uncontended", NULL, test_mutex_perf);
for (i = 1; i <= 10; i++)
{
gchar name[80];
sprintf (name, "/thread/mutex/perf/contended/%d", i);
g_test_add_data_func (name, GINT_TO_POINTER (i), test_mutex_perf);
}
}
return g_test_run ();
}