--- /dev/null
+#include <vppinfra/time.h>
+#include <vppinfra/cache.h>
+#include <vppinfra/error.h>
+#include <vppinfra/tw_timer_2t_1w_2048sl.h>
+#include <vppinfra/tw_timer_16t_2w_512sl.h>
+
+typedef struct
+{
+ /** Handle returned from tw_start_timer */
+ u32 stop_timer_handle;
+
+ /** Test item should expire at this clock tick */
+ u32 expected_to_expire;
+} tw_timer_test_elt_t;
+
+typedef struct
+{
+ /** Pool of test objects */
+ tw_timer_test_elt_t *test_elts;
+
+ /** The single-wheel */
+ tw_timer_wheel_2t_1w_2048sl_t single_wheel;
+
+ /** The double-wheel */
+ tw_timer_wheel_16t_2w_512sl_t double_wheel;
+
+ /** random number seed */
+ u32 seed;
+
+ /** number of timers */
+ u32 ntimers;
+
+ /** number of "churn" iterations */
+ u32 niter;
+
+ /** number of clock ticks per churn iteration */
+ u32 ticks_per_iter;
+
+ /** cpu timer */
+ clib_time_t clib_time;
+} tw_timer_test_main_t;
+
+tw_timer_test_main_t tw_timer_test_main;
+
+static void
+run_single_wheel (tw_timer_wheel_2t_1w_2048sl_t * tw, u32 n_ticks)
+{
+ u32 i;
+ f64 now = tw->last_run_time + 1.01;
+
+ for (i = 0; i < n_ticks; i++)
+ {
+ tw_timer_expire_timers_2t_1w_2048sl (tw, now);
+ now += 1.01;
+ }
+}
+
+static void
+run_double_wheel (tw_timer_wheel_16t_2w_512sl_t * tw, u32 n_ticks)
+{
+ u32 i;
+ f64 now = tw->last_run_time + 1.01;
+
+ for (i = 0; i < n_ticks; i++)
+ {
+ tw_timer_expire_timers_16t_2w_512sl (tw, now);
+ now += 1.01;
+ }
+}
+
+static void
+expired_timer_single_callback (u32 * expired_timers)
+{
+ int i;
+ u32 pool_index, timer_id;
+ tw_timer_test_elt_t *e;
+ tw_timer_test_main_t *tm = &tw_timer_test_main;
+
+ for (i = 0; i < vec_len (expired_timers); i++)
+ {
+ pool_index = expired_timers[i] & 0x7FFFFFFF;
+ timer_id = expired_timers[i] >> 31;
+
+ ASSERT (timer_id == 1);
+
+ e = pool_elt_at_index (tm->test_elts, pool_index);
+
+ if (e->expected_to_expire != tm->single_wheel.current_tick)
+ {
+ fformat (stdout, "[%d] expired at %d not %d\n",
+ e - tm->test_elts, tm->single_wheel.current_tick,
+ e->expected_to_expire);
+ }
+ pool_put (tm->test_elts, e);
+ }
+}
+
+static void
+expired_timer_double_callback (u32 * expired_timers)
+{
+ int i;
+ u32 pool_index, timer_id;
+ tw_timer_test_elt_t *e;
+ tw_timer_test_main_t *tm = &tw_timer_test_main;
+
+ for (i = 0; i < vec_len (expired_timers); i++)
+ {
+ pool_index = expired_timers[i] & 0x0FFFFFFF;
+ timer_id = expired_timers[i] >> 28;
+
+ ASSERT (timer_id == 14);
+
+ e = pool_elt_at_index (tm->test_elts, pool_index);
+
+ if (e->expected_to_expire != tm->double_wheel.current_tick)
+ {
+ fformat (stdout, "[%d] expired at %d not %d\n",
+ e - tm->test_elts, tm->double_wheel.current_tick,
+ e->expected_to_expire);
+ }
+ pool_put (tm->test_elts, e);
+ }
+}
+
+static clib_error_t *
+test2_single (tw_timer_test_main_t * tm)
+{
+ u32 i, j;
+ tw_timer_test_elt_t *e;
+ u32 initial_wheel_offset;
+ u32 expiration_time;
+ u32 max_expiration_time = 0;
+ u32 *deleted_indices = 0;
+ u32 adds = 0, deletes = 0;
+ f64 before, after;
+
+ clib_time_init (&tm->clib_time);
+
+ tw_timer_wheel_init_2t_1w_2048sl (&tm->single_wheel,
+ expired_timer_single_callback,
+ 1.0 /* timer interval */ );
+
+ /* Prime offset */
+ initial_wheel_offset = 757;
+
+ run_single_wheel (&tm->single_wheel, initial_wheel_offset);
+
+ fformat (stdout, "test %d timers, %d iter, %d ticks per iter, 0x%x seed\n",
+ tm->ntimers, tm->niter, tm->ticks_per_iter, tm->seed);
+
+ before = clib_time_now (&tm->clib_time);
+
+ /* Prime the pump */
+ for (i = 0; i < tm->ntimers; i++)
+ {
+ pool_get (tm->test_elts, e);
+ memset (e, 0, sizeof (*e));
+
+ do
+ {
+ expiration_time = random_u32 (&tm->seed) & (2047);
+ }
+ while (expiration_time == 0);
+
+ if (expiration_time > max_expiration_time)
+ max_expiration_time = expiration_time;
+
+ e->expected_to_expire = expiration_time + initial_wheel_offset;
+ e->stop_timer_handle =
+ tw_timer_start_2t_1w_2048sl (&tm->single_wheel, e - tm->test_elts,
+ 1 /* timer id */ ,
+ expiration_time);
+ }
+
+ adds += i;
+
+ for (i = 0; i < tm->niter; i++)
+ {
+ run_single_wheel (&tm->single_wheel, tm->ticks_per_iter);
+
+ j = 0;
+ vec_reset_length (deleted_indices);
+ /* *INDENT-OFF* */
+ pool_foreach (e, tm->test_elts,
+ ({
+ tw_timer_stop_2t_1w_2048sl (&tm->single_wheel, e->stop_timer_handle);
+ vec_add1 (deleted_indices, e - tm->test_elts);
+ if (++j >= tm->ntimers / 4)
+ goto del_and_re_add;
+ }));
+ /* *INDENT-ON* */
+
+ del_and_re_add:
+ for (j = 0; j < vec_len (deleted_indices); j++)
+ pool_put_index (tm->test_elts, deleted_indices[j]);
+
+ deletes += j;
+
+ for (j = 0; j < tm->ntimers / 4; j++)
+ {
+ pool_get (tm->test_elts, e);
+ memset (e, 0, sizeof (*e));
+
+ do
+ {
+ expiration_time = random_u32 (&tm->seed) & (2047);
+ }
+ while (expiration_time == 0);
+
+ if (expiration_time > max_expiration_time)
+ max_expiration_time = expiration_time;
+
+ e->expected_to_expire =
+ expiration_time + tm->single_wheel.current_tick;
+ e->stop_timer_handle = tw_timer_start_2t_1w_2048sl
+ (&tm->single_wheel, e - tm->test_elts, 1 /* timer id */ ,
+ expiration_time);
+ }
+ adds += j;
+ }
+
+ vec_free (deleted_indices);
+
+ run_single_wheel (&tm->single_wheel, max_expiration_time + 1);
+
+ after = clib_time_now (&tm->clib_time);
+
+ fformat (stdout, "%d adds, %d deletes, %d ticks\n", adds, deletes,
+ tm->single_wheel.current_tick);
+ fformat (stdout, "test ran %.2f seconds, %.2f ops/second\n",
+ (after - before),
+ ((f64) adds + (f64) deletes +
+ (f64) tm->single_wheel.current_tick) / (after - before));
+
+ if (pool_elts (tm->test_elts))
+ fformat (stdout, "Note: %d elements remain in pool\n",
+ pool_elts (tm->test_elts));
+
+ /* *INDENT-OFF* */
+ pool_foreach (e, tm->test_elts,
+ ({
+ fformat (stdout, "[%d] expected to expire %d\n",
+ e - tm->test_elts,
+ e->expected_to_expire);
+ }));
+ /* *INDENT-ON* */
+
+ pool_free (tm->test_elts);
+ tw_timer_wheel_free_2t_1w_2048sl (&tm->single_wheel);
+ return 0;
+}
+
+static clib_error_t *
+test2_double (tw_timer_test_main_t * tm)
+{
+ u32 i, j;
+ tw_timer_test_elt_t *e;
+ u32 initial_wheel_offset;
+ u32 expiration_time;
+ u32 max_expiration_time = 0;
+ u32 *deleted_indices = 0;
+ u32 adds = 0, deletes = 0;
+ f64 before, after;
+
+ clib_time_init (&tm->clib_time);
+
+ tw_timer_wheel_init_16t_2w_512sl (&tm->double_wheel,
+ expired_timer_double_callback,
+ 1.0 /* timer interval */ );
+
+ /* Prime offset */
+ initial_wheel_offset = 757;
+
+ run_double_wheel (&tm->double_wheel, initial_wheel_offset);
+
+ fformat (stdout, "test %d timers, %d iter, %d ticks per iter, 0x%x seed\n",
+ tm->ntimers, tm->niter, tm->ticks_per_iter, tm->seed);
+
+ before = clib_time_now (&tm->clib_time);
+
+ /* Prime the pump */
+ for (i = 0; i < tm->ntimers; i++)
+ {
+ pool_get (tm->test_elts, e);
+ memset (e, 0, sizeof (*e));
+
+ do
+ {
+ expiration_time = random_u32 (&tm->seed) & ((1 << 17) - 1);
+ }
+ while (expiration_time == 0);
+
+ if (expiration_time > max_expiration_time)
+ max_expiration_time = expiration_time;
+
+ e->expected_to_expire = expiration_time + initial_wheel_offset;
+ e->stop_timer_handle =
+ tw_timer_start_16t_2w_512sl (&tm->double_wheel, e - tm->test_elts,
+ 14 /* timer id */ ,
+ expiration_time);
+ }
+
+ adds += i;
+
+ for (i = 0; i < tm->niter; i++)
+ {
+ run_double_wheel (&tm->double_wheel, tm->ticks_per_iter);
+
+ j = 0;
+ vec_reset_length (deleted_indices);
+ /* *INDENT-OFF* */
+ pool_foreach (e, tm->test_elts,
+ ({
+ tw_timer_stop_16t_2w_512sl (&tm->double_wheel, e->stop_timer_handle);
+ vec_add1 (deleted_indices, e - tm->test_elts);
+ if (++j >= tm->ntimers / 4)
+ goto del_and_re_add;
+ }));
+ /* *INDENT-ON* */
+
+ del_and_re_add:
+ for (j = 0; j < vec_len (deleted_indices); j++)
+ pool_put_index (tm->test_elts, deleted_indices[j]);
+
+ deletes += j;
+
+ for (j = 0; j < tm->ntimers / 4; j++)
+ {
+ pool_get (tm->test_elts, e);
+ memset (e, 0, sizeof (*e));
+
+ do
+ {
+ expiration_time = random_u32 (&tm->seed) & ((1 << 17) - 1);
+ }
+ while (expiration_time == 0);
+
+ if (expiration_time > max_expiration_time)
+ max_expiration_time = expiration_time;
+
+ e->expected_to_expire = expiration_time +
+ tm->double_wheel.current_tick;
+ e->stop_timer_handle = tw_timer_start_16t_2w_512sl
+ (&tm->double_wheel, e - tm->test_elts, 14 /* timer id */ ,
+ expiration_time);
+ }
+ adds += j;
+ }
+
+ vec_free (deleted_indices);
+
+ run_double_wheel (&tm->double_wheel, max_expiration_time + 1);
+
+ after = clib_time_now (&tm->clib_time);
+
+ fformat (stdout, "%d adds, %d deletes, %d ticks\n", adds, deletes,
+ tm->double_wheel.current_tick);
+ fformat (stdout, "test ran %.2f seconds, %.2f ops/second\n",
+ (after - before),
+ ((f64) adds + (f64) deletes +
+ (f64) tm->double_wheel.current_tick) / (after - before));
+
+ if (pool_elts (tm->test_elts))
+ fformat (stdout, "Note: %d elements remain in pool\n",
+ pool_elts (tm->test_elts));
+
+ /* *INDENT-OFF* */
+ pool_foreach (e, tm->test_elts,
+ ({
+ fformat (stdout, "[%d] expected to expire %d\n",
+ e - tm->test_elts,
+ e->expected_to_expire);
+ }));
+ /* *INDENT-ON* */
+
+ pool_free (tm->test_elts);
+ tw_timer_wheel_free_16t_2w_512sl (&tm->double_wheel);
+ return 0;
+}
+
+static clib_error_t *
+test1_single (tw_timer_test_main_t * tm)
+{
+ u32 i;
+ tw_timer_test_elt_t *e;
+ u32 offset;
+
+ tw_timer_wheel_init_2t_1w_2048sl (&tm->single_wheel,
+ expired_timer_single_callback,
+ 1.0 /* timer interval */ );
+
+ /*
+ * Prime offset, to make sure that the wheel starts in a
+ * non-trivial position
+ */
+ offset = 123;
+
+ run_single_wheel (&tm->single_wheel, offset);
+
+ fformat (stdout, "initial wheel time %d, fast index %d\n",
+ tm->single_wheel.current_tick,
+ tm->single_wheel.current_index[TW_TIMER_RING_FAST]);
+
+ for (i = 0; i < tm->ntimers; i++)
+ {
+ u32 expected_to_expire;
+ u32 timer_arg;
+
+ timer_arg = 1 + i;
+ timer_arg &= 2047;
+ if (timer_arg == 0)
+ timer_arg = 1;
+
+ expected_to_expire = timer_arg + offset;
+
+ pool_get (tm->test_elts, e);
+ memset (e, 0, sizeof (*e));
+ e->expected_to_expire = expected_to_expire;
+ e->stop_timer_handle = tw_timer_start_2t_1w_2048sl
+ (&tm->single_wheel, e - tm->test_elts, 1 /* timer id */ ,
+ timer_arg);
+ }
+ run_single_wheel (&tm->single_wheel, tm->ntimers + 3);
+
+ if (pool_elts (tm->test_elts))
+ fformat (stdout, "Note: %d elements remain in pool\n",
+ pool_elts (tm->test_elts));
+
+ /* *INDENT-OFF* */
+ pool_foreach (e, tm->test_elts,
+ ({
+ fformat(stdout, "[%d] expected to expire %d\n",
+ e - tm->test_elts,
+ e->expected_to_expire);
+ }));
+ /* *INDENT-ON* */
+
+ fformat (stdout,
+ "final wheel time %d, fast index %d\n",
+ tm->single_wheel.current_tick,
+ tm->single_wheel.current_index[TW_TIMER_RING_FAST]);
+
+ pool_free (tm->test_elts);
+ tw_timer_wheel_free_2t_1w_2048sl (&tm->single_wheel);
+ return 0;
+}
+
+static clib_error_t *
+test1_double (tw_timer_test_main_t * tm)
+{
+ u32 i;
+ tw_timer_test_elt_t *e;
+ u32 offset;
+
+ tw_timer_wheel_init_16t_2w_512sl (&tm->double_wheel,
+ expired_timer_double_callback,
+ 1.0 /* timer interval */ );
+
+ /*
+ * Prime offset, to make sure that the wheel starts in a
+ * non-trivial position
+ */
+ offset = 227989;
+
+ run_double_wheel (&tm->double_wheel, offset);
+
+ fformat (stdout, "initial wheel time %d, fast index %d\n",
+ tm->double_wheel.current_tick,
+ tm->double_wheel.current_index[TW_TIMER_RING_FAST]);
+
+ for (i = 0; i < tm->ntimers; i++)
+ {
+ pool_get (tm->test_elts, e);
+ memset (e, 0, sizeof (*e));
+
+ e->expected_to_expire = i + offset + 1;
+ e->stop_timer_handle = tw_timer_start_16t_2w_512sl
+ (&tm->double_wheel, e - tm->test_elts, 14 /* timer id */ ,
+ i + 1);
+ }
+ run_double_wheel (&tm->double_wheel, tm->ntimers + 3);
+
+ if (pool_elts (tm->test_elts))
+ fformat (stdout, "Note: %d elements remain in pool\n",
+ pool_elts (tm->test_elts));
+
+ /* *INDENT-OFF* */
+ pool_foreach (e, tm->test_elts,
+ ({
+ fformat(stdout, "[%d] expected to expire %d\n",
+ e - tm->test_elts,
+ e->expected_to_expire);
+ }));
+ /* *INDENT-ON* */
+
+ fformat (stdout,
+ "final wheel time %d, fast index %d\n",
+ tm->double_wheel.current_tick,
+ tm->double_wheel.current_index[TW_TIMER_RING_FAST]);
+
+ pool_free (tm->test_elts);
+ tw_timer_wheel_free_16t_2w_512sl (&tm->double_wheel);
+ return 0;
+}
+
+static clib_error_t *
+timer_test_command_fn (tw_timer_test_main_t * tm, unformat_input_t * input)
+{
+
+ int is_test1 = 0;
+ int num_wheels = 1;
+ int is_test2 = 0;
+
+ memset (tm, 0, sizeof (*tm));
+ /* Default values */
+ tm->ntimers = 100000;
+ tm->seed = 0xDEADDABE;
+ tm->niter = 1000;
+ tm->ticks_per_iter = 727;
+
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (input, "seed %d", &tm->seed))
+ ;
+ else if (unformat (input, "test1"))
+ is_test1 = 1;
+ else if (unformat (input, "test2"))
+ is_test2 = 1;
+ else if (unformat (input, "wheels %d", &num_wheels))
+ ;
+ else if (unformat (input, "ntimers %d", &tm->ntimers))
+ ;
+ else if (unformat (input, "niter %d", &tm->niter))
+ ;
+ else if (unformat (input, "ticks_per_iter %d", &tm->ticks_per_iter))
+ ;
+ }
+
+ if (is_test1 + is_test2 == 0)
+ return clib_error_return (0, "No test specified [test1..n]");
+
+ if (num_wheels < 1 || num_wheels > 2)
+ return clib_error_return (0, "unsupported... 1 or 2 wheels only");
+
+ if (is_test1)
+ {
+ if (num_wheels == 1)
+ return test1_single (tm);
+ else
+ return test1_double (tm);
+ }
+ if (is_test2)
+ {
+ if (num_wheels == 1)
+ return test2_single (tm);
+ else
+ return test2_double (tm);
+ }
+ /* NOTREACHED */
+ return 0;
+}
+
+#ifdef CLIB_UNIX
+int
+main (int argc, char *argv[])
+{
+ unformat_input_t i;
+ clib_error_t *error;
+ tw_timer_test_main_t *tm = &tw_timer_test_main;
+
+ clib_mem_init (0, 3ULL << 30);
+
+ unformat_init_command_line (&i, argv);
+ error = timer_test_command_fn (tm, &i);
+ unformat_free (&i);
+
+ if (error)
+ {
+ clib_error_report (error);
+ return 1;
+ }
+ return 0;
+}
+#endif /* CLIB_UNIX */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
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