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authorBrian Russell <brian@graphiant.com>2021-01-21 14:44:09 +0000
committerNeale Ranns <neale@graphiant.com>2021-01-28 10:27:19 +0000
commit1b2e16ac7703681a66edd589fd1f6be26b9f1661 (patch)
tree8a397709d31acb1f75e554034b34f5c5300dcf64 /src/vnet/ip/ip_punt_drop.h
parent97de8a2d2faad42ff6c36807ec1e21bf9a0d9c91 (diff)
ip: do policer thread handoff from punt policers
Pass packets arriving at the ip[46] punt policer nodes to punt policer handoff nodes if the worker thread they arrive on is not the same one configured in the policer. Initially, the policer will be tied to the worker thread that it first received a packet on. This will be expanded in future to be a configuration API option. Type: improvement Signed-off-by: Brian Russell <brian@graphiant.com> Change-Id: Ic39d936084c354af1859ad3d946da6cd0f6e34d9
Diffstat (limited to 'src/vnet/ip/ip_punt_drop.h')
-rw-r--r--src/vnet/ip/ip_punt_drop.h133
1 files changed, 82 insertions, 51 deletions
diff --git a/src/vnet/ip/ip_punt_drop.h b/src/vnet/ip/ip_punt_drop.h
index 2fc1140a0bf..11affcb6e28 100644
--- a/src/vnet/ip/ip_punt_drop.h
+++ b/src/vnet/ip/ip_punt_drop.h
@@ -33,6 +33,7 @@ typedef struct ip_punt_policer_t_
typedef enum ip_punt_policer_next_t_
{
IP_PUNT_POLICER_NEXT_DROP,
+ IP_PUNT_POLICER_NEXT_HANDOFF,
IP_PUNT_POLICER_N_NEXT,
} ip_punt_policer_next_t;
@@ -71,6 +72,10 @@ ip_punt_policer (vlib_main_t * vm,
u64 time_in_policer_periods;
vnet_feature_main_t *fm = &feature_main;
vnet_feature_config_main_t *cm = &fm->feature_config_mains[arc_index];
+ vnet_policer_main_t *pm = &vnet_policer_main;
+ policer_read_response_type_st *pol = &pm->policers[policer_index];
+ u32 pol_thread_index = pol->thread_index;
+ u32 this_thread_index = vm->thread_index;
time_in_policer_periods =
clib_cpu_time_now () >> POLICER_TICKS_PER_PERIOD_SHIFT;
@@ -79,6 +84,20 @@ ip_punt_policer (vlib_main_t * vm,
n_left_from = frame->n_vectors;
next_index = node->cached_next_index;
+ if (PREDICT_FALSE (pol_thread_index == ~0))
+ {
+ /*
+ * This is the first packet to use this policer. Set the
+ * thread index in the policer to this thread and any
+ * packets seen by this node on other threads will
+ * be handed off to this one.
+ *
+ * This could happen simultaneously on another thread.
+ */
+ clib_atomic_cmp_and_swap (&pol->thread_index, ~0, this_thread_index);
+ pol_thread_index = this_thread_index;
+ }
+
while (n_left_from > 0)
{
vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
@@ -102,45 +121,52 @@ ip_punt_policer (vlib_main_t * vm,
b0 = vlib_get_buffer (vm, bi0);
b1 = vlib_get_buffer (vm, bi1);
- vnet_get_config_data (&cm->config_main,
- &b0->current_config_index, &next0, 0);
- vnet_get_config_data (&cm->config_main,
- &b1->current_config_index, &next1, 0);
-
- act0 = vnet_policer_police (vm, b0,
- policer_index,
- time_in_policer_periods,
- POLICE_CONFORM);
- act1 = vnet_policer_police (vm, b1,
- policer_index,
- time_in_policer_periods,
- POLICE_CONFORM);
-
- if (PREDICT_FALSE (act0 == SSE2_QOS_ACTION_DROP))
+ if (PREDICT_FALSE (this_thread_index != pol_thread_index))
{
- next0 = IP_PUNT_POLICER_NEXT_DROP;
- b0->error = node->errors[IP_PUNT_POLICER_ERROR_DROP];
+ next0 = next1 = IP_PUNT_POLICER_NEXT_HANDOFF;
}
- if (PREDICT_FALSE (act1 == SSE2_QOS_ACTION_DROP))
+ else
{
- next1 = IP_PUNT_POLICER_NEXT_DROP;
- b1->error = node->errors[IP_PUNT_POLICER_ERROR_DROP];
- }
- if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
- {
- ip_punt_policer_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->next = next0;
- t->policer_index = policer_index;
- }
- if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED))
- {
- ip_punt_policer_trace_t *t =
- vlib_add_trace (vm, node, b1, sizeof (*t));
- t->next = next1;
- t->policer_index = policer_index;
+ vnet_get_config_data (&cm->config_main,
+ &b0->current_config_index, &next0, 0);
+ vnet_get_config_data (&cm->config_main,
+ &b1->current_config_index, &next1, 0);
+
+ act0 =
+ vnet_policer_police (vm, b0, policer_index,
+ time_in_policer_periods, POLICE_CONFORM);
+ act1 =
+ vnet_policer_police (vm, b1, policer_index,
+ time_in_policer_periods, POLICE_CONFORM);
+
+ if (PREDICT_FALSE (act0 == SSE2_QOS_ACTION_DROP))
+ {
+ next0 = IP_PUNT_POLICER_NEXT_DROP;
+ b0->error = node->errors[IP_PUNT_POLICER_ERROR_DROP];
+ }
+ if (PREDICT_FALSE (act1 == SSE2_QOS_ACTION_DROP))
+ {
+ next1 = IP_PUNT_POLICER_NEXT_DROP;
+ b1->error = node->errors[IP_PUNT_POLICER_ERROR_DROP];
+ }
+
+ if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ ip_punt_policer_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->next = next0;
+ t->policer_index = policer_index;
+ }
+ if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ ip_punt_policer_trace_t *t =
+ vlib_add_trace (vm, node, b1, sizeof (*t));
+ t->next = next1;
+ t->policer_index = policer_index;
+ }
}
+
vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
n_left_to_next,
bi0, bi1, next0, next1);
@@ -162,27 +188,32 @@ ip_punt_policer (vlib_main_t * vm,
b0 = vlib_get_buffer (vm, bi0);
- vnet_get_config_data (&cm->config_main,
- &b0->current_config_index, &next0, 0);
-
- act0 = vnet_policer_police (vm, b0,
- policer_index,
- time_in_policer_periods,
- POLICE_CONFORM);
- if (PREDICT_FALSE (act0 == SSE2_QOS_ACTION_DROP))
+ if (PREDICT_FALSE (this_thread_index != pol_thread_index))
{
- next0 = IP_PUNT_POLICER_NEXT_DROP;
- b0->error = node->errors[IP_PUNT_POLICER_ERROR_DROP];
+ next0 = IP_PUNT_POLICER_NEXT_HANDOFF;
}
-
- if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+ else
{
- ip_punt_policer_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->next = next0;
- t->policer_index = policer_index;
+ vnet_get_config_data (&cm->config_main,
+ &b0->current_config_index, &next0, 0);
+
+ act0 =
+ vnet_policer_police (vm, b0, policer_index,
+ time_in_policer_periods, POLICE_CONFORM);
+ if (PREDICT_FALSE (act0 == SSE2_QOS_ACTION_DROP))
+ {
+ next0 = IP_PUNT_POLICER_NEXT_DROP;
+ b0->error = node->errors[IP_PUNT_POLICER_ERROR_DROP];
+ }
+
+ if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ ip_punt_policer_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->next = next0;
+ t->policer_index = policer_index;
+ }
}
-
vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
n_left_to_next, bi0, next0);
}