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rec-mutex testcase: add a performance test

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Add a reasonable performance test for uncontended and contended cases at
different levels of recursion depth.
This commit is contained in:
Ryan Lortie 2011-10-02 12:08:56 -04:00
parent 7973d9f8ba
commit 037c91f845
1 changed files with 88 additions and 0 deletions
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88
glib/tests/rec-mutex.c
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@ -22,6 +22,8 @@
#include <glib.h>
#include <stdio.h>
static void
test_rec_mutex1 (void)
{
@ -150,6 +152,71 @@ test_rec_mutex4 (void)
g_assert (owners[i] == NULL);
}
#define COUNT_TO 100000000
static gint depth;
static gboolean
do_addition (gint *value)
{
static GRecMutex lock;
gboolean more;
gint i;
/* test performance of "good" cases (ie: short critical sections) */
for (i = 0; i < depth; i++)
g_rec_mutex_lock (&lock);
if ((more = *value != COUNT_TO))
if (*value != -1)
(*value)++;
for (i = 0; i < depth; i++)
g_rec_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 c = GPOINTER_TO_INT (data);
GThread *threads[THREADS];
gint64 start_time;
gint n_threads;
gdouble rate;
gint x = -1;
gint i;
n_threads = c / 256;
depth = c % 256;
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[])
{
@ -160,5 +227,26 @@ main (int argc, char *argv[])
g_test_add_func ("/thread/rec-mutex3", test_rec_mutex3);
g_test_add_func ("/thread/rec-mutex4", test_rec_mutex4);
if (g_test_perf ())
{
gint i, j;
for (i = 0; i < 5; i++)
for (j = 1; j <= 5; j++)
{
gchar name[80];
guint c;
c = i * 256 + j;
if (i)
sprintf (name, "/thread/rec-mutex/perf/contended%d/depth%d", i, j);
else
sprintf (name, "/thread/rec-mutex/perf/uncontended/depth%d", j);
g_test_add_data_func (name, GINT_TO_POINTER (c), test_mutex_perf);
}
}
return g_test_run ();
}