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authorFlorin Coras <fcoras@cisco.com>2018-06-22 15:29:38 -0700
committerDave Barach <openvpp@barachs.net>2018-06-25 20:43:44 +0000
commitadb5bd5344cd7b422c0c08e6434ad8642b897502 (patch)
tree93f2ed26f808ff73882436ea4702eb0eedc2f765 /src/vppinfra/test_tw_timer.c
parentc474feea962bcde3b5eece0ff2be8d3fd8019093 (diff)
tw: add light weight timer update function
Because it avoids pool putting/getting the timer, this function is somewhat faster than stopping and restarting a timer. Change-Id: Id99ed9d356b0b1f7e12facfe8da193e1cd30b3ec Signed-off-by: Florin Coras <fcoras@cisco.com>
Diffstat (limited to 'src/vppinfra/test_tw_timer.c')
-rw-r--r--src/vppinfra/test_tw_timer.c120
1 files changed, 118 insertions, 2 deletions
diff --git a/src/vppinfra/test_tw_timer.c b/src/vppinfra/test_tw_timer.c
index ec0baa07fad..bde958f3ca2 100644
--- a/src/vppinfra/test_tw_timer.c
+++ b/src/vppinfra/test_tw_timer.c
@@ -482,6 +482,117 @@ test2_double (tw_timer_test_main_t * tm)
return 0;
}
+static u32
+get_expiration_time (tw_timer_test_main_t * tm)
+{
+ u32 expiration_time;
+ do
+ {
+ expiration_time = random_u64 (&tm->seed) & ((1 << 17) - 1);
+ }
+ while (expiration_time == 0);
+ return expiration_time;
+}
+
+static clib_error_t *
+test2_double_updates (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, updates = 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 = 7577;
+ 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 = get_expiration_time (tm);
+ max_expiration_time = clib_max (expiration_time, max_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);
+ }
+
+ for (i = 0; i < tm->niter; i++)
+ {
+ run_double_wheel (&tm->double_wheel, tm->ticks_per_iter);
+
+ j = 0;
+
+ /* *INDENT-OFF* */
+ pool_foreach (e, tm->test_elts,
+ ({
+ expiration_time = get_expiration_time (tm);
+ max_expiration_time = clib_max (expiration_time, max_expiration_time);
+ e->expected_to_expire = expiration_time
+ + tm->double_wheel.current_tick;
+ tw_timer_update_16t_2w_512sl (&tm->double_wheel, e->stop_timer_handle,
+ expiration_time);
+ if (++j >= tm->ntimers / 4)
+ goto done;
+ }));
+ /* *INDENT-ON* */
+
+ done:
+ updates += j;
+ }
+
+ run_double_wheel (&tm->double_wheel, max_expiration_time + 1);
+
+ after = clib_time_now (&tm->clib_time);
+
+ fformat (stdout, "%d updates, %d ticks\n", updates,
+ tm->double_wheel.current_tick);
+ fformat (stdout, "test ran %.2f seconds, %.2f ops/second\n",
+ (after - before),
+ ((f64) updates + (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 *
test2_triple (tw_timer_test_main_t * tm)
{
@@ -1141,7 +1252,7 @@ static clib_error_t *
timer_test_command_fn (tw_timer_test_main_t * tm, unformat_input_t * input)
{
- int is_test1 = 0;
+ int is_test1 = 0, is_updates = 0;
int num_wheels = 1;
int is_test2 = 0;
int is_test3 = 0;
@@ -1172,6 +1283,8 @@ timer_test_command_fn (tw_timer_test_main_t * tm, unformat_input_t * input)
is_test4 = 1;
else if (unformat (input, "linear"))
is_test5 = 1;
+ else if (unformat (input, "updates"))
+ is_updates = 1;
else if (unformat (input, "wheels %d", &num_wheels))
;
else if (unformat (input, "ntimers %d", &tm->ntimers))
@@ -1202,7 +1315,10 @@ timer_test_command_fn (tw_timer_test_main_t * tm, unformat_input_t * input)
if (num_wheels == 1)
return test2_single (tm);
else if (num_wheels == 2)
- return test2_double (tm);
+ if (is_updates)
+ return test2_double_updates (tm);
+ else
+ return test2_double (tm);
else if (num_wheels == 3)
{
if (overflow == 0)