configurable per-dispatch-cycle sleep
Workaround for lack of driver interrupt support. Also quite handy for
home gateway, laptop/vagrant, other use-cases not requiring maximum
vectors/second for proper operation.
Change-Id: Ifc4b98112450664beef67b89ab8a6940a3bf24b5
Signed-off-by: Dave Barach <dave@barachs.net>
diff --git a/src/vlib/unix/input.c b/src/vlib/unix/input.c
index 321e443..0a61c05 100644
--- a/src/vlib/unix/input.c
+++ b/src/vlib/unix/input.c
@@ -148,9 +148,27 @@
int timeout_ms = 0, max_timeout_ms = 10;
f64 vector_rate = vlib_last_vectors_per_main_loop (vm);
+ /*
+ * If we've been asked for a fixed-sleep between main loop polls,
+ * do so right away.
+ */
+ if (PREDICT_FALSE (is_main && um->poll_sleep_usec))
+ {
+ struct timespec ts, tsrem;
+ timeout = 0;
+ timeout_ms = 0;
+ node->input_main_loops_per_call = 0;
+ ts.tv_sec = 0;
+ ts.tv_nsec = 1000 * um->poll_sleep_usec;
+
+ while (nanosleep (&ts, &tsrem) < 0)
+ {
+ ts = tsrem;
+ }
+ }
/* If we're not working very hard, decide how long to sleep */
- if (is_main && vector_rate < 2 && vm->api_queue_nonempty == 0
- && nm->input_node_counts_by_state[VLIB_NODE_STATE_POLLING] == 0)
+ else if (is_main && vector_rate < 2 && vm->api_queue_nonempty == 0
+ && nm->input_node_counts_by_state[VLIB_NODE_STATE_POLLING] == 0)
{
ticks_until_expiration = TW (tw_timer_first_expires_in_ticks)
((TWT (tw_timer_wheel) *) nm->timing_wheel);