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d09443fe20
Add a performance test for bitlocks.
Make use of the new g_atomic_int_{and,or} to avoid having to do the
usual compare-and-exchange loop.
On a test machine, the change increases performance from approximately
20 million uncontended acquire/releases per second to 31 million.
40 lines
674 B
C
40 lines
674 B
C
#include <glib.h>
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#define ITERATIONS 100000000
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static void
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test_bitlocks (void)
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{
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guint64 start = g_get_monotonic_time ();
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gint lock = 0;
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gint i;
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for (i = 0; i < ITERATIONS; i++)
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{
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g_bit_lock (&lock, 0);
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g_bit_unlock (&lock, 0);
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}
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{
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gdouble elapsed;
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gdouble rate;
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elapsed = g_get_monotonic_time () - start;
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elapsed /= 1000000;
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rate = ITERATIONS / elapsed;
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g_test_maximized_result (rate, "iterations per second");
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}
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}
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int
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main (int argc, char **argv)
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{
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g_test_init (&argc, &argv, NULL);
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if (g_test_perf ())
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g_test_add_func ("/bitlock/performance/uncontended", test_bitlocks);
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return g_test_run ();
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}
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