#include <vppinfra/error.h>
#include <vppinfra/tw_timer_2t_1w_2048sl.h>
#include <vppinfra/tw_timer_16t_2w_512sl.h>
+#include <vppinfra/tw_timer_4t_3w_256sl.h>
+#include <vppinfra/tw_timer_1t_3w_1024sl_ov.h>
typedef struct
{
u32 stop_timer_handle;
/** Test item should expire at this clock tick */
- u32 expected_to_expire;
+ u64 expected_to_expire;
} tw_timer_test_elt_t;
typedef struct
/** The double-wheel */
tw_timer_wheel_16t_2w_512sl_t double_wheel;
+ /* The triple wheel */
+ tw_timer_wheel_4t_3w_256sl_t triple_wheel;
+
+ /* The triple wheel with overflow vector */
+ tw_timer_wheel_1t_3w_1024sl_ov_t triple_ov_wheel;
+
/** random number seed */
- u32 seed;
+ u64 seed;
/** number of timers */
u32 ntimers;
}
}
+static void
+run_triple_wheel (tw_timer_wheel_4t_3w_256sl_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_4t_3w_256sl (tw, now);
+ now += 1.01;
+ }
+}
+
+static void
+run_triple_ov_wheel (tw_timer_wheel_1t_3w_1024sl_ov_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_1t_3w_1024sl_ov (tw, now);
+ now += 1.01;
+ }
+}
+
static void
expired_timer_single_callback (u32 * expired_timers)
{
if (e->expected_to_expire != tm->single_wheel.current_tick)
{
- fformat (stdout, "[%d] expired at %d not %d\n",
+ fformat (stdout, "[%d] expired at %lld not %lld\n",
e - tm->test_elts, tm->single_wheel.current_tick,
e->expected_to_expire);
}
if (e->expected_to_expire != tm->double_wheel.current_tick)
{
- fformat (stdout, "[%d] expired at %d not %d\n",
+ fformat (stdout, "[%d] expired at %lld not %lld\n",
e - tm->test_elts, tm->double_wheel.current_tick,
e->expected_to_expire);
}
}
}
+static void
+expired_timer_triple_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] & 0x3FFFFFFF;
+ timer_id = expired_timers[i] >> 30;
+
+ ASSERT (timer_id == 3);
+
+ e = pool_elt_at_index (tm->test_elts, pool_index);
+
+ if (e->expected_to_expire != tm->triple_wheel.current_tick)
+ {
+ fformat (stdout, "[%d] expired at %lld not %lld\n",
+ e - tm->test_elts, tm->triple_wheel.current_tick,
+ e->expected_to_expire);
+ }
+ pool_put (tm->test_elts, e);
+ }
+}
+
+static void
+expired_timer_triple_ov_callback (u32 * expired_timers)
+{
+ int i;
+ u32 pool_index;
+ 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];
+
+ e = pool_elt_at_index (tm->test_elts, pool_index);
+
+ if (e->expected_to_expire != tm->triple_ov_wheel.current_tick)
+ {
+ fformat (stdout, "[%d] expired at %lld not %lld\n",
+ e - tm->test_elts, tm->triple_ov_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;
+ u64 expiration_time;
u32 max_expiration_time = 0;
u32 *deleted_indices = 0;
u32 adds = 0, deletes = 0;
run_single_wheel (&tm->single_wheel, initial_wheel_offset);
- fformat (stdout, "test %d timers, %d iter, %d ticks per iter, 0x%x seed\n",
+ fformat (stdout, "initial wheel time %d, fast index %d\n",
+ tm->single_wheel.current_tick,
+ tm->single_wheel.current_index[TW_TIMER_RING_FAST]);
+
+ initial_wheel_offset = tm->single_wheel.current_tick;
+
+ fformat (stdout,
+ "test %d timers, %d iter, %d ticks per iter, 0x%llx seed\n",
tm->ntimers, tm->niter, tm->ticks_per_iter, tm->seed);
before = clib_time_now (&tm->clib_time);
do
{
- expiration_time = random_u32 (&tm->seed) & (2047);
+ expiration_time = random_u64 (&tm->seed) & (2047);
}
while (expiration_time == 0);
del_and_re_add:
for (j = 0; j < vec_len (deleted_indices); j++)
- pool_put_index (tm->test_elts, deleted_indices[j]);
+ {
+ pool_put_index (tm->test_elts, deleted_indices[j]);
+ }
deletes += j;
do
{
- expiration_time = random_u32 (&tm->seed) & (2047);
+ expiration_time = random_u64 (&tm->seed) & (2047);
}
while (expiration_time == 0);
1.0 /* timer interval */ , ~0);
/* Prime offset */
- initial_wheel_offset = 757;
+ initial_wheel_offset = 7577;
run_double_wheel (&tm->double_wheel, initial_wheel_offset);
- fformat (stdout, "test %d timers, %d iter, %d ticks per iter, 0x%x seed\n",
+ fformat (stdout, "initial wheel time %d, fast index %d slow index %d\n",
+ tm->double_wheel.current_tick,
+ tm->double_wheel.current_index[TW_TIMER_RING_FAST],
+ tm->double_wheel.current_index[TW_TIMER_RING_SLOW]);
+
+ initial_wheel_offset = tm->double_wheel.current_tick;
+
+ fformat (stdout,
+ "test %d timers, %d iter, %d ticks per iter, 0x%llx seed\n",
tm->ntimers, tm->niter, tm->ticks_per_iter, tm->seed);
before = clib_time_now (&tm->clib_time);
do
{
- expiration_time = random_u32 (&tm->seed) & ((1 << 17) - 1);
+ expiration_time = random_u64 (&tm->seed) & ((1 << 17) - 1);
}
while (expiration_time == 0);
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 */ ,
do
{
- expiration_time = random_u32 (&tm->seed) & ((1 << 17) - 1);
+ expiration_time = random_u64 (&tm->seed) & ((1 << 17) - 1);
}
while (expiration_time == 0);
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);
}
static clib_error_t *
-test1_single (tw_timer_test_main_t * tm)
+test2_triple (tw_timer_test_main_t * tm)
{
- u32 i;
+ u32 i, j;
tw_timer_test_elt_t *e;
- u32 offset;
+ u32 initial_wheel_offset = 0;
+ u32 expiration_time;
+ u32 max_expiration_time = 0;
+ u32 *deleted_indices = 0;
+ u32 adds = 0, deletes = 0;
+ f64 before, after;
- tw_timer_wheel_init_2t_1w_2048sl (&tm->single_wheel,
- expired_timer_single_callback,
- 1.0 /* timer interval */ , ~0);
+ clib_time_init (&tm->clib_time);
- /*
- * Prime offset, to make sure that the wheel starts in a
- * non-trivial position
- */
- offset = 123;
+ tw_timer_wheel_init_4t_3w_256sl (&tm->triple_wheel,
+ expired_timer_triple_callback,
+ 1.0 /* timer interval */ , ~0);
- 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]);
+ /* Prime offset */
+ initial_wheel_offset = 75700;
+ run_triple_wheel (&tm->triple_wheel, initial_wheel_offset);
- for (i = 0; i < tm->ntimers; i++)
- {
- u32 expected_to_expire;
- u32 timer_arg;
+ fformat (stdout,
+ "initial wheel time %d, fi %d si %d gi %d\n",
+ tm->triple_wheel.current_tick,
+ tm->triple_wheel.current_index[TW_TIMER_RING_FAST],
+ tm->triple_wheel.current_index[TW_TIMER_RING_SLOW],
+ tm->triple_wheel.current_index[TW_TIMER_RING_GLACIER]);
- timer_arg = 1 + i;
- timer_arg &= 2047;
- if (timer_arg == 0)
- timer_arg = 1;
+ initial_wheel_offset = tm->triple_wheel.current_tick;
- expected_to_expire = timer_arg + offset;
+ fformat (stdout,
+ "test %d timers, %d iter, %d ticks per iter, 0x%llx 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));
- 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));
+ do
+ {
+ expiration_time = random_u64 (&tm->seed) & ((1 << 17) - 1);
+ }
+ while (expiration_time == 0);
- /* *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* */
+ if (expiration_time > max_expiration_time)
+ max_expiration_time = expiration_time;
- fformat (stdout,
- "final wheel time %d, fast index %d\n",
- tm->single_wheel.current_tick,
- tm->single_wheel.current_index[TW_TIMER_RING_FAST]);
+ e->expected_to_expire = expiration_time + initial_wheel_offset;
- pool_free (tm->test_elts);
- tw_timer_wheel_free_2t_1w_2048sl (&tm->single_wheel);
- return 0;
-}
+ e->stop_timer_handle =
+ tw_timer_start_4t_3w_256sl (&tm->triple_wheel, e - tm->test_elts,
+ 3 /* timer id */ ,
+ expiration_time);
+ }
-static clib_error_t *
-test1_double (tw_timer_test_main_t * tm)
-{
- u32 i;
- tw_timer_test_elt_t *e;
- u32 offset;
+ adds += i;
- tw_timer_wheel_init_16t_2w_512sl (&tm->double_wheel,
- expired_timer_double_callback,
- 1.0 /* timer interval */ , ~0);
+ for (i = 0; i < tm->niter; i++)
+ {
+ run_triple_wheel (&tm->triple_wheel, tm->ticks_per_iter);
- /*
- * Prime offset, to make sure that the wheel starts in a
- * non-trivial position
- */
- offset = 227989;
+ j = 0;
+ vec_reset_length (deleted_indices);
+ /* *INDENT-OFF* */
+ pool_foreach (e, tm->test_elts,
+ ({
+ tw_timer_stop_4t_3w_256sl (&tm->triple_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* */
- run_double_wheel (&tm->double_wheel, offset);
+ del_and_re_add:
+ for (j = 0; j < vec_len (deleted_indices); j++)
+ pool_put_index (tm->test_elts, deleted_indices[j]);
- fformat (stdout, "initial wheel time %d, fast index %d\n",
- tm->double_wheel.current_tick,
- tm->double_wheel.current_index[TW_TIMER_RING_FAST]);
+ deletes += j;
- for (i = 0; i < tm->ntimers; i++)
- {
- pool_get (tm->test_elts, e);
- memset (e, 0, sizeof (*e));
+ for (j = 0; j < tm->ntimers / 4; j++)
+ {
+ 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);
+ do
+ {
+ expiration_time = random_u64 (&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->triple_wheel.current_tick;
+
+ e->stop_timer_handle = tw_timer_start_4t_3w_256sl
+ (&tm->triple_wheel, e - tm->test_elts, 3 /* timer id */ ,
+ expiration_time);
+ }
+ adds += j;
}
- run_double_wheel (&tm->double_wheel, tm->ntimers + 3);
+
+ vec_free (deleted_indices);
+
+ run_triple_wheel (&tm->triple_wheel, max_expiration_time + 1);
+
+ after = clib_time_now (&tm->clib_time);
+
+ fformat (stdout, "%d adds, %d deletes, %d ticks\n", adds, deletes,
+ tm->triple_wheel.current_tick);
+ fformat (stdout, "test ran %.2f seconds, %.2f ops/second\n",
+ (after - before),
+ ((f64) adds + (f64) deletes +
+ (f64) tm->triple_wheel.current_tick) / (after - before));
if (pool_elts (tm->test_elts))
fformat (stdout, "Note: %d elements remain in pool\n",
/* *INDENT-OFF* */
pool_foreach (e, tm->test_elts,
({
- fformat(stdout, "[%d] expected to expire %d\n",
- e - tm->test_elts,
- e->expected_to_expire);
+ 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);
+ tw_timer_wheel_free_4t_3w_256sl (&tm->triple_wheel);
return 0;
}
static clib_error_t *
-timer_test_command_fn (tw_timer_test_main_t * tm, unformat_input_t * input)
+test2_triple_ov (tw_timer_test_main_t * tm)
{
+ u32 i, j;
+ tw_timer_test_elt_t *e;
+ u32 initial_wheel_offset = 0;
+ u32 expiration_time;
+ u32 max_expiration_time = 0;
+ u32 *deleted_indices = 0;
+ u32 adds = 0, deletes = 0;
+ f64 before, after;
- int is_test1 = 0;
- int num_wheels = 1;
- int is_test2 = 0;
+ clib_time_init (&tm->clib_time);
- memset (tm, 0, sizeof (*tm));
- /* Default values */
- tm->ntimers = 100000;
- tm->seed = 0xDEADDABE;
- tm->niter = 1000;
- tm->ticks_per_iter = 727;
+ tw_timer_wheel_init_1t_3w_1024sl_ov (&tm->triple_ov_wheel,
+ expired_timer_triple_ov_callback,
+ 1.0 /* timer interval */ , ~0);
- while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
- {
- if (unformat (input, "seed %d", &tm->seed))
- ;
+
+ /* Prime offset */
+ initial_wheel_offset = 75700;
+ run_triple_ov_wheel (&tm->triple_ov_wheel, initial_wheel_offset);
+
+ fformat (stdout,
+ "initial wheel time %d, fi %d si %d gi %d\n",
+ tm->triple_ov_wheel.current_tick,
+ tm->triple_ov_wheel.current_index[TW_TIMER_RING_FAST],
+ tm->triple_ov_wheel.current_index[TW_TIMER_RING_SLOW],
+ tm->triple_ov_wheel.current_index[TW_TIMER_RING_GLACIER]);
+
+ initial_wheel_offset = tm->triple_ov_wheel.current_tick;
+
+ fformat (stdout,
+ "test %d timers, %d iter, %d ticks per iter, 0x%llx 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_u64 (&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_1t_3w_1024sl_ov (&tm->triple_ov_wheel,
+ e - tm->test_elts, 0 /* timer id */ ,
+ expiration_time);
+ }
+
+ adds += i;
+
+ for (i = 0; i < tm->niter; i++)
+ {
+ run_triple_ov_wheel (&tm->triple_ov_wheel, tm->ticks_per_iter);
+
+ j = 0;
+ vec_reset_length (deleted_indices);
+ /* *INDENT-OFF* */
+ pool_foreach (e, tm->test_elts,
+ ({
+ tw_timer_stop_1t_3w_1024sl_ov (&tm->triple_ov_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_u64 (&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->triple_ov_wheel.current_tick;
+
+ e->stop_timer_handle = tw_timer_start_1t_3w_1024sl_ov
+ (&tm->triple_ov_wheel, e - tm->test_elts, 0 /* timer id */ ,
+ expiration_time);
+ }
+ adds += j;
+ }
+
+ vec_free (deleted_indices);
+
+ run_triple_ov_wheel (&tm->triple_ov_wheel, max_expiration_time + 1);
+
+ after = clib_time_now (&tm->clib_time);
+
+ fformat (stdout, "%d adds, %d deletes, %d ticks\n", adds, deletes,
+ tm->triple_ov_wheel.current_tick);
+ fformat (stdout, "test ran %.2f seconds, %.2f ops/second\n",
+ (after - before),
+ ((f64) adds + (f64) deletes +
+ (f64) tm->triple_ov_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,
+ ({
+ TWT (tw_timer) * t;
+
+ fformat (stdout, "[%d] expected to expire %d\n",
+ e - tm->test_elts,
+ e->expected_to_expire);
+ t = pool_elt_at_index (tm->triple_ov_wheel.timers, e->stop_timer_handle);
+ fformat (stdout, " expiration_time %lld\n", t->expiration_time);
+ }));
+ /* *INDENT-ON* */
+
+ pool_free (tm->test_elts);
+ tw_timer_wheel_free_1t_3w_1024sl_ov (&tm->triple_ov_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 */ , ~0);
+
+ /*
+ * 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]);
+
+ offset = tm->single_wheel.current_tick;
+
+ 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 */ , ~0);
+
+ /*
+ * 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 *
+test3_triple_double (tw_timer_test_main_t * tm)
+{
+ tw_timer_test_elt_t *e;
+ u32 initial_wheel_offset = 0;
+ u32 expiration_time;
+ u32 max_expiration_time = 0;
+ u32 adds = 0, deletes = 0;
+ f64 before, after;
+
+ clib_time_init (&tm->clib_time);
+
+ tw_timer_wheel_init_4t_3w_256sl (&tm->triple_wheel,
+ expired_timer_triple_callback,
+ 1.0 /* timer interval */ , ~0);
+
+ initial_wheel_offset = 0;
+ run_triple_wheel (&tm->triple_wheel, initial_wheel_offset);
+
+ fformat (stdout,
+ "initial wheel time %d, fi %d si %d gi %d\n",
+ tm->triple_wheel.current_tick,
+ tm->triple_wheel.current_index[TW_TIMER_RING_FAST],
+ tm->triple_wheel.current_index[TW_TIMER_RING_SLOW],
+ tm->triple_wheel.current_index[TW_TIMER_RING_GLACIER]);
+
+ initial_wheel_offset = tm->triple_wheel.current_tick;
+
+ fformat (stdout, "Create a timer which expires at wheel-time (1, 0, 0)\n");
+
+ before = clib_time_now (&tm->clib_time);
+
+ /* Prime the pump */
+ pool_get (tm->test_elts, e);
+ memset (e, 0, sizeof (*e));
+
+ /* 1 glacier ring tick from now */
+ expiration_time = TW_SLOTS_PER_RING * TW_SLOTS_PER_RING;
+ e->expected_to_expire = expiration_time + initial_wheel_offset;
+ max_expiration_time = expiration_time;
+
+ e->stop_timer_handle =
+ tw_timer_start_4t_3w_256sl (&tm->triple_wheel, e - tm->test_elts,
+ 3 /* timer id */ ,
+ expiration_time);
+
+ run_triple_wheel (&tm->triple_wheel, max_expiration_time + 1);
+
+ after = clib_time_now (&tm->clib_time);
+
+ fformat (stdout, "%d adds, %d deletes, %d ticks\n", adds, deletes,
+ tm->triple_wheel.current_tick);
+ fformat (stdout, "test ran %.2f seconds, %.2f ops/second\n",
+ (after - before),
+ ((f64) adds + (f64) deletes +
+ (f64) tm->triple_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_4t_3w_256sl (&tm->triple_wheel);
+ return 0;
+}
+
+static clib_error_t *
+test4_double_double (tw_timer_test_main_t * tm)
+{
+ u32 i;
+ 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 */ , ~0);
+ /* Prime offset */
+ initial_wheel_offset = 0;
+
+ run_double_wheel (&tm->double_wheel, initial_wheel_offset);
+
+ fformat (stdout, "initial wheel time %d, fast index %d slow index %d\n",
+ tm->double_wheel.current_tick,
+ tm->double_wheel.current_index[TW_TIMER_RING_FAST],
+ tm->double_wheel.current_index[TW_TIMER_RING_SLOW]);
+
+ initial_wheel_offset = tm->double_wheel.current_tick;
+
+ fformat (stdout, "test timer which expires at 512 ticks\n");
+
+ 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));
+
+ expiration_time = 512;
+
+ 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 = 1;
+
+ 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 *
+test5_double (tw_timer_test_main_t * tm)
+{
+ u32 i;
+ tw_timer_test_elt_t *e;
+ u32 initial_wheel_offset;
+ u32 expiration_time;
+ u32 max_expiration_time = 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 */ , ~0);
+
+ /* Prime offset */
+ initial_wheel_offset = 7567;
+
+ run_double_wheel (&tm->double_wheel, initial_wheel_offset);
+
+ fformat (stdout, "initial wheel time %d, fast index %d slow index %d\n",
+ tm->double_wheel.current_tick,
+ tm->double_wheel.current_index[TW_TIMER_RING_FAST],
+ tm->double_wheel.current_index[TW_TIMER_RING_SLOW]);
+
+ initial_wheel_offset = tm->double_wheel.current_tick;
+
+ fformat (stdout,
+ "test %d timers, %d iter, %d ticks per iter, 0x%llx 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));
+
+ expiration_time = i + 1;
+
+ 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;
+
+ 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 *
+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;
+ int is_test3 = 0;
+ int is_test4 = 0;
+ int is_test5 = 0;
+ int overflow = 0;
+
+ memset (tm, 0, sizeof (*tm));
+ /* Default values */
+ tm->ntimers = 100000;
+ tm->seed = 0xDEADDABEB00BFACE;
+ tm->niter = 1000;
+ tm->ticks_per_iter = 727;
+
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (input, "seed %lld", &tm->seed))
+ ;
else if (unformat (input, "test1"))
is_test1 = 1;
else if (unformat (input, "test2"))
is_test2 = 1;
+ else if (unformat (input, "overflow"))
+ overflow = 1;
+ else if (unformat (input, "lebron"))
+ is_test3 = 1;
+ else if (unformat (input, "wilt"))
+ is_test4 = 1;
+ else if (unformat (input, "linear"))
+ is_test5 = 1;
else if (unformat (input, "wheels %d", &num_wheels))
;
else if (unformat (input, "ntimers %d", &tm->ntimers))
;
else if (unformat (input, "ticks_per_iter %d", &tm->ticks_per_iter))
;
+ else
+ break;
}
- if (is_test1 + is_test2 == 0)
+ if (is_test1 + is_test2 + is_test3 + is_test4 + is_test5 == 0)
return clib_error_return (0, "No test specified [test1..n]");
- if (num_wheels < 1 || num_wheels > 2)
+ if (num_wheels < 1 || num_wheels > 3)
return clib_error_return (0, "unsupported... 1 or 2 wheels only");
if (is_test1)
{
if (num_wheels == 1)
return test2_single (tm);
- else
+ else if (num_wheels == 2)
return test2_double (tm);
+ else if (num_wheels == 3)
+ {
+ if (overflow == 0)
+ return test2_triple (tm);
+ else
+ return test2_triple_ov (tm);
+ }
}
+ if (is_test3)
+ return test3_triple_double (tm);
+
+ if (is_test4)
+ return test4_double_double (tm);
+
+ if (is_test5)
+ return test5_double (tm);
+
/* NOTREACHED */
return 0;
}
}
#endif /* CLIB_UNIX */
+/* For debugging... */
+int
+pifi (void *p, u32 index)
+{
+ return pool_is_free_index (p, index);
+}
+
+u32
+vl (void *p)
+{
+ return vec_len (p);
+}
+
+uword
+pe (void *v)
+{
+ return (pool_elts (v));
+}
+
/*
* fd.io coding-style-patch-verification: ON
*
*
*
*/
-
static inline u32
TW (make_internal_timer_handle) (u32 pool_index, u32 timer_id)
{
u32 handle;
ASSERT (timer_id < TW_TIMERS_PER_OBJECT);
+#if LOG2_TW_TIMERS_PER_OBJECT > 0
ASSERT (pool_index < (1 << (32 - LOG2_TW_TIMERS_PER_OBJECT)));
handle = (timer_id << (32 - LOG2_TW_TIMERS_PER_OBJECT)) | (pool_index);
+#else
+ handle = pool_index;
+#endif
return handle;
}
* @param tw_timer_wheel_t * tw timer wheel object pointer
* @param u32 pool_index user pool index, presumably for a tw session
* @param u32 timer_id app-specific timer ID. 4 bits.
- * @param u32 interval timer interval in ticks
+ * @param u64 interval timer interval in ticks
* @returns handle needed to cancel the timer
*/
u32
TW (tw_timer_start) (TWT (tw_timer_wheel) * tw, u32 pool_index, u32 timer_id,
- u32 interval)
+ u64 interval)
{
#if TW_TIMER_WHEELS > 1
u16 slow_ring_offset;
u32 carry;
+#endif
+#if TW_TIMER_WHEELS > 2
+ u16 glacier_ring_offset;
+#endif
+#if TW_OVERFLOW_VECTOR > 0
+ u64 interval_plus_time_to_wrap, triple_wrap_mask;
#endif
u16 fast_ring_offset;
tw_timer_wheel_slot_t *ts;
ASSERT (interval);
pool_get (tw->timers, t);
- t->next = t->prev = ~0;
-#if TW_TIMER_WHEELS > 1
- t->fast_ring_offset = ~0;
-#endif
+ memset (t, 0xff, sizeof (*t));
+
t->user_handle = TW (make_internal_timer_handle) (pool_index, timer_id);
+ /* Factor interval into 1..3 wheel offsets */
+#if TW_TIMER_WHEELS > 2
+#if TW_OVERFLOW_VECTOR > 0
+ /*
+ * This is tricky. Put a timer onto the overflow
+ * vector if the interval PLUS the time
+ * until the next triple-wrap exceeds one full revolution
+ * of all three wheels.
+ */
+ triple_wrap_mask = (1 << (3 * TW_RING_SHIFT)) - 1;
+ interval_plus_time_to_wrap =
+ interval + (tw->current_tick & triple_wrap_mask);
+ if ((interval_plus_time_to_wrap >= 1 << (3 * TW_RING_SHIFT)))
+ {
+ t->expiration_time = tw->current_tick + interval;
+ ts = &tw->overflow;
+ timer_addhead (tw->timers, ts->head_index, t - tw->timers);
+ return t - tw->timers;
+ }
+#endif
+
+ glacier_ring_offset = interval >> (2 * TW_RING_SHIFT);
+ ASSERT (glacier_ring_offset < TW_SLOTS_PER_RING);
+ interval -= (glacier_ring_offset << (2 * TW_RING_SHIFT));
+#endif
+#if TW_TIMER_WHEELS > 1
+ slow_ring_offset = interval >> TW_RING_SHIFT;
+ ASSERT (slow_ring_offset < TW_SLOTS_PER_RING);
+ interval -= (slow_ring_offset << TW_RING_SHIFT);
+#endif
fast_ring_offset = interval & TW_RING_MASK;
- fast_ring_offset += tw->current_index[TW_TIMER_RING_FAST];
+
+ /*
+ * Account for the current wheel positions(s)
+ * This is made slightly complicated by the fact that the current
+ * index vector will contain (TW_SLOTS_PER_RING, ...) when
+ * the actual position is (0, ...)
+ */
+
+ fast_ring_offset += tw->current_index[TW_TIMER_RING_FAST] & TW_RING_MASK;
+
#if TW_TIMER_WHEELS > 1
carry = fast_ring_offset >= TW_SLOTS_PER_RING ? 1 : 0;
fast_ring_offset %= TW_SLOTS_PER_RING;
- slow_ring_offset = (interval >> TW_RING_SHIFT) + carry;
+ slow_ring_offset += (tw->current_index[TW_TIMER_RING_SLOW] & TW_RING_MASK)
+ + carry;
+ carry = slow_ring_offset >= TW_SLOTS_PER_RING ? 1 : 0;
+ slow_ring_offset %= TW_SLOTS_PER_RING;
+#endif
- /* Timer duration exceeds ~7 hrs? Oops */
- ASSERT (slow_ring_offset < TW_SLOTS_PER_RING);
+#if TW_TIMER_WHEELS > 2
+ glacier_ring_offset +=
+ (tw->current_index[TW_TIMER_RING_GLACIER] & TW_RING_MASK) + carry;
+ glacier_ring_offset %= TW_SLOTS_PER_RING;
+#endif
- /* Timer expires more than 51.2 seconds from now? */
- if (slow_ring_offset)
+#if TW_TIMER_WHEELS > 2
+ if (glacier_ring_offset !=
+ (tw->current_index[TW_TIMER_RING_GLACIER] & TW_RING_MASK))
{
- slow_ring_offset += tw->current_index[TW_TIMER_RING_SLOW];
- slow_ring_offset %= TW_SLOTS_PER_RING;
+ /* We'll need slow and fast ring offsets later */
+ t->slow_ring_offset = slow_ring_offset;
+ t->fast_ring_offset = fast_ring_offset;
- /* We'll want the fast ring offset later... */
+ ts = &tw->w[TW_TIMER_RING_GLACIER][glacier_ring_offset];
+
+ timer_addhead (tw->timers, ts->head_index, t - tw->timers);
+
+ return t - tw->timers;
+ }
+#endif
+
+#if TW_TIMER_WHEELS > 1
+ /* Timer expires more than 51.2 seconds from now? */
+ if (slow_ring_offset !=
+ (tw->current_index[TW_TIMER_RING_SLOW] & TW_RING_MASK))
+ {
+ /* We'll need the fast ring offset later... */
t->fast_ring_offset = fast_ring_offset;
- ASSERT (t->fast_ring_offset < TW_SLOTS_PER_RING);
ts = &tw->w[TW_TIMER_RING_SLOW][slow_ring_offset];
}
#else
fast_ring_offset %= TW_SLOTS_PER_RING;
- ASSERT (interval < TW_SLOTS_PER_RING);
#endif
/* Timer expires less than one fast-ring revolution from now */
return t - tw->timers;
}
+#if TW_TIMER_SCAN_FOR_HANDLE > 0
+int TW (scan_for_handle) (TWT (tw_timer_wheel) * tw, u32 handle)
+{
+ int i, j;
+ tw_timer_wheel_slot_t *ts;
+ TWT (tw_timer) * t, *head;
+ u32 next_index;
+ int rv = 0;
+
+ for (i = 0; i < TW_TIMER_WHEELS; i++)
+ {
+ for (j = 0; j < TW_SLOTS_PER_RING; j++)
+ {
+ ts = &tw->w[i][j];
+ head = pool_elt_at_index (tw->timers, ts->head_index);
+ next_index = head->next;
+
+ while (next_index != ts->head_index)
+ {
+ t = pool_elt_at_index (tw->timers, next_index);
+ if (next_index == handle)
+ {
+ clib_warning ("handle %d found in ring %d slot %d",
+ handle, i, j);
+ clib_warning ("user handle 0x%x", t->user_handle);
+ rv = 1;
+ }
+ next_index = t->next;
+ }
+ }
+ }
+ return rv;
+}
+#endif /* TW_TIMER_SCAN_FOR_HANDLE */
+
/**
* @brief Stop a tw timer
* @param tw_timer_wheel_t * tw timer wheel object pointer
* @brief Initialize a tw timer wheel template instance
* @param tw_timer_wheel_t * tw timer wheel object pointer
* @param void * expired_timer_callback. Passed a u32 * vector of
- * expired timer handles.
+ * expired timer handles. The callback is optional.
* @param f64 timer_interval_in_seconds
*/
void
}
tw->timer_interval = timer_interval_in_seconds;
tw->ticks_per_second = 1.0 / timer_interval_in_seconds;
+ tw->first_expires_tick = ~0ULL;
+ vec_validate (tw->expired_timer_handles, 0);
+ _vec_len (tw->expired_timer_handles) = 0;
for (ring = 0; ring < TW_TIMER_WHEELS; ring++)
{
ts->head_index = t - tw->timers;
}
}
+
+#if TW_OVERFLOW_VECTOR > 0
+ ts = &tw->overflow;
+ pool_get (tw->timers, t);
+ memset (t, 0xff, sizeof (*t));
+ t->next = t->prev = t - tw->timers;
+ ts->head_index = t - tw->timers;
+#endif
}
/**
pool_put (tw->timers, head);
}
}
+
+#if TW_OVERFLOW_VECVOR > 0
+ ts = &tw->overflow;
+ head = pool_elt_at_index (tw->timers, ts->head_index);
+ next_index = head->next;
+
+ while (next_index != ts->head_index)
+ {
+ t = pool_elt_at_index (tw->timers, next_index);
+ next_index = t->next;
+ pool_put (tw->timers, t);
+ }
+ pool_put (tw->timers, head);
+#endif
+
memset (tw, 0, sizeof (*tw));
}
* as needed. This routine should be called once every timer_interval seconds
* @param tw_timer_wheel_t * tw timer wheel template instance pointer
* @param f64 now the current time, e.g. from vlib_time_now(vm)
+ * @returns u32 * vector of expired user handles
*/
-u32 TW (tw_timer_expire_timers) (TWT (tw_timer_wheel) * tw, f64 now)
+static inline
+ u32 * TW (tw_timer_expire_timers_internal) (TWT (tw_timer_wheel) * tw,
+ f64 now,
+ u32 * callback_vector_arg)
{
u32 nticks, i;
tw_timer_wheel_slot_t *ts;
TWT (tw_timer) * t, *head;
+ u32 *callback_vector;
u32 fast_wheel_index;
u32 next_index;
- u32 nexpirations, total_nexpirations;
-#if TW_TIMER_WHEELS > 1
- u32 slow_wheel_index;
-#endif
+ u32 slow_wheel_index __attribute__ ((unused));
+ u32 glacier_wheel_index __attribute__ ((unused));
/* Shouldn't happen */
if (PREDICT_FALSE (now < tw->next_run_time))
- return 0;
+ return callback_vector_arg;
/* Number of ticks which have occurred */
nticks = tw->ticks_per_second * (now - tw->last_run_time);
if (nticks == 0)
- return 0;
+ return callback_vector_arg;
/* Remember when we ran, compute next runtime */
tw->next_run_time = (now + tw->timer_interval);
- total_nexpirations = 0;
+ if (callback_vector_arg == 0)
+ {
+ _vec_len (tw->expired_timer_handles) = 0;
+ callback_vector = tw->expired_timer_handles;
+ }
+ else
+ callback_vector = callback_vector_arg;
+
for (i = 0; i < nticks; i++)
{
fast_wheel_index = tw->current_index[TW_TIMER_RING_FAST];
+ if (TW_TIMER_WHEELS > 1)
+ slow_wheel_index = tw->current_index[TW_TIMER_RING_SLOW];
+ if (TW_TIMER_WHEELS > 2)
+ glacier_wheel_index = tw->current_index[TW_TIMER_RING_GLACIER];
+
+#if TW_OVERFLOW_VECTOR > 0
+ /* Triple odometer-click? Process the overflow vector... */
+ if (PREDICT_FALSE (fast_wheel_index == TW_SLOTS_PER_RING
+ && slow_wheel_index == TW_SLOTS_PER_RING
+ && glacier_wheel_index == TW_SLOTS_PER_RING))
+ {
+ u64 interval;
+ u32 new_glacier_ring_offset, new_slow_ring_offset;
+ u32 new_fast_ring_offset;
+ ts = &tw->overflow;
+ head = pool_elt_at_index (tw->timers, ts->head_index);
+ next_index = head->next;
+
+ /* Make slot empty */
+ head->next = head->prev = ts->head_index;
+
+ /* traverse slot, place timers wherever they go */
+ while (next_index != head - tw->timers)
+ {
+ t = pool_elt_at_index (tw->timers, next_index);
+ next_index = t->next;
+
+ /* Remove from the overflow vector (hammer) */
+ t->next = t->prev = ~0;
+
+ ASSERT (t->expiration_time >= tw->current_tick);
+
+ interval = t->expiration_time - tw->current_tick;
+
+ /* Right back onto the overflow vector? */
+ if (interval >= (1 << (3 * TW_RING_SHIFT)))
+ {
+ ts = &tw->overflow;
+ timer_addhead (tw->timers, ts->head_index, t - tw->timers);
+ continue;
+ }
+ /* Compute ring offsets */
+ new_glacier_ring_offset = interval >> (2 * TW_RING_SHIFT);
+
+ interval -= (new_glacier_ring_offset << (2 * TW_RING_SHIFT));
+
+ /* Note: the wheels are at (0,0,0), no add-with-carry needed */
+ new_slow_ring_offset = interval >> TW_RING_SHIFT;
+ interval -= (new_slow_ring_offset << TW_RING_SHIFT);
+ new_fast_ring_offset = interval & TW_RING_MASK;
+ t->slow_ring_offset = new_slow_ring_offset;
+ t->fast_ring_offset = new_fast_ring_offset;
+
+ /* Timer expires Right Now */
+ if (PREDICT_FALSE (t->slow_ring_offset == 0 &&
+ t->fast_ring_offset == 0 &&
+ new_glacier_ring_offset == 0))
+ {
+ vec_add1 (callback_vector, t->user_handle);
+ pool_put (tw->timers, t);
+ }
+ /* Timer moves to the glacier ring */
+ else if (new_glacier_ring_offset)
+ {
+ ts = &tw->w[TW_TIMER_RING_GLACIER][new_glacier_ring_offset];
+ timer_addhead (tw->timers, ts->head_index, t - tw->timers);
+ }
+ /* Timer moves to the slow ring */
+ else if (t->slow_ring_offset)
+ {
+ /* Add to slow ring */
+ ts = &tw->w[TW_TIMER_RING_SLOW][t->slow_ring_offset];
+ timer_addhead (tw->timers, ts->head_index, t - tw->timers);
+ }
+ /* Timer timer moves to the fast ring */
+ else
+ {
+ ts = &tw->w[TW_TIMER_RING_FAST][t->fast_ring_offset];
+ timer_addhead (tw->timers, ts->head_index, t - tw->timers);
+ }
+ }
+ }
+#endif
+
+#if TW_TIMER_WHEELS > 2
/*
- * If we've been around the fast ring once,
- * process one slot in the slow ring before we handle
- * the fast ring.
+ * Double odometer-click? Process one slot in the glacier ring...
*/
- if (PREDICT_FALSE (fast_wheel_index == TW_SLOTS_PER_RING))
+ if (PREDICT_FALSE (fast_wheel_index == TW_SLOTS_PER_RING
+ && slow_wheel_index == TW_SLOTS_PER_RING))
{
- fast_wheel_index = tw->current_index[TW_TIMER_RING_FAST] = 0;
+ glacier_wheel_index %= TW_SLOTS_PER_RING;
+ ts = &tw->w[TW_TIMER_RING_GLACIER][glacier_wheel_index];
-#if TW_TIMER_WHEELS > 1
- tw->current_index[TW_TIMER_RING_SLOW]++;
- tw->current_index[TW_TIMER_RING_SLOW] %= TW_SLOTS_PER_RING;
- slow_wheel_index = tw->current_index[TW_TIMER_RING_SLOW];
+ head = pool_elt_at_index (tw->timers, ts->head_index);
+ next_index = head->next;
+
+ /* Make slot empty */
+ head->next = head->prev = ts->head_index;
+
+ /* traverse slot, deal timers into slow ring */
+ while (next_index != head - tw->timers)
+ {
+ t = pool_elt_at_index (tw->timers, next_index);
+ next_index = t->next;
+
+ /* Remove from glacier ring slot (hammer) */
+ t->next = t->prev = ~0;
+
+ /* Timer expires Right Now */
+ if (PREDICT_FALSE (t->slow_ring_offset == 0 &&
+ t->fast_ring_offset == 0))
+ {
+ vec_add1 (callback_vector, t->user_handle);
+ pool_put (tw->timers, t);
+ }
+ /* Timer expires during slow-wheel tick 0 */
+ else if (PREDICT_FALSE (t->slow_ring_offset == 0))
+ {
+ ts = &tw->w[TW_TIMER_RING_FAST][t->fast_ring_offset];
+ timer_addhead (tw->timers, ts->head_index, t - tw->timers);
+ }
+ else /* typical case */
+ {
+ /* Add to slow ring */
+ ts = &tw->w[TW_TIMER_RING_SLOW][t->slow_ring_offset];
+ timer_addhead (tw->timers, ts->head_index, t - tw->timers);
+ }
+ }
+ }
+#endif
+#if TW_TIMER_WHEELS > 1
+ /*
+ * Single odometer-click? Process a slot in the slow ring,
+ */
+ if (PREDICT_FALSE (fast_wheel_index == TW_SLOTS_PER_RING))
+ {
+ slow_wheel_index %= TW_SLOTS_PER_RING;
ts = &tw->w[TW_TIMER_RING_SLOW][slow_wheel_index];
head = pool_elt_at_index (tw->timers, ts->head_index);
t = pool_elt_at_index (tw->timers, next_index);
next_index = t->next;
- /* Remove from slow ring slot (hammer) */
+ /* Remove from sloe ring slot (hammer) */
t->next = t->prev = ~0;
- ASSERT (t->fast_ring_offset < TW_SLOTS_PER_RING);
- /* Add to fast ring */
- ts = &tw->w[TW_TIMER_RING_FAST][t->fast_ring_offset];
- timer_addhead (tw->timers, ts->head_index, t - tw->timers);
+
+ /* Timer expires Right Now */
+ if (PREDICT_FALSE (t->fast_ring_offset == 0))
+ {
+ vec_add1 (callback_vector, t->user_handle);
+ pool_put (tw->timers, t);
+ }
+ else /* typical case */
+ {
+ /* Add to fast ring */
+ ts = &tw->w[TW_TIMER_RING_FAST][t->fast_ring_offset];
+ timer_addhead (tw->timers, ts->head_index, t - tw->timers);
+ }
}
-#endif
}
+#endif
/* Handle the fast ring */
- vec_reset_length (tw->expired_timer_handles);
-
+ fast_wheel_index %= TW_SLOTS_PER_RING;
ts = &tw->w[TW_TIMER_RING_FAST][fast_wheel_index];
head = pool_elt_at_index (tw->timers, ts->head_index);
{
t = pool_elt_at_index (tw->timers, next_index);
next_index = t->next;
- vec_add1 (tw->expired_timer_handles, t->user_handle);
+ vec_add1 (callback_vector, t->user_handle);
pool_put (tw->timers, t);
}
/* If any timers expired, tell the user */
- nexpirations = vec_len (tw->expired_timer_handles);
- if (nexpirations)
+ if (callback_vector_arg == 0 && vec_len (callback_vector))
{
- tw->expired_timer_callback (tw->expired_timer_handles);
- total_nexpirations += nexpirations;
+ /* The callback is optional. We return the u32 * handle vector */
+ if (tw->expired_timer_callback)
+ {
+ tw->expired_timer_callback (callback_vector);
+ _vec_len (callback_vector) = 0;
+ }
+ tw->expired_timer_handles = callback_vector;
}
- tw->current_index[TW_TIMER_RING_FAST]++;
tw->current_tick++;
+ fast_wheel_index++;
+ tw->current_index[TW_TIMER_RING_FAST] = fast_wheel_index;
+
+#if TW_TIMER_WHEELS > 1
+ if (PREDICT_FALSE (fast_wheel_index == TW_SLOTS_PER_RING))
+ slow_wheel_index++;
+ tw->current_index[TW_TIMER_RING_SLOW] = slow_wheel_index;
+#endif
+
+#if TW_TIMER_WHEELS > 2
+ if (PREDICT_FALSE (slow_wheel_index == TW_SLOTS_PER_RING))
+ glacier_wheel_index++;
+ tw->current_index[TW_TIMER_RING_GLACIER] = glacier_wheel_index;
+#endif
- if (total_nexpirations >= tw->max_expirations)
+ if (vec_len (callback_vector) >= tw->max_expirations)
break;
}
+ if (callback_vector_arg == 0)
+ tw->expired_timer_handles = callback_vector;
+
tw->last_run_time += i * tw->timer_interval;
- return total_nexpirations;
+ return callback_vector;
+}
+
+u32 *TW (tw_timer_expire_timers) (TWT (tw_timer_wheel) * tw, f64 now)
+{
+ return TW (tw_timer_expire_timers_internal) (tw, now, 0 /* no vector */ );
+}
+
+u32 *TW (tw_timer_expire_timers_vec) (TWT (tw_timer_wheel) * tw, f64 now,
+ u32 * vec)
+{
+ return TW (tw_timer_expire_timers_internal) (tw, now, vec);
}
/*
Code Review / vpp.git / commitdiff