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authorFlorin Coras <fcoras@cisco.com>2021-03-19 13:12:41 -0700
committerDamjan Marion <dmarion@me.com>2021-03-23 19:58:06 +0000
commit982e44fcc482cc9bc08e46c2a36ab66b0861bacb (patch)
tree7f1ad87cd446a6a5db831c947e007d889b6ce1ba /src/vnet
parent3853b26c5d8db27df6e2f00539bf021e565614ac (diff)
vlib: add node adaptive mode flag
Don't switch nodes from interrupt to polling state unless adaptive mode flag set. For starters, flag set only on interface input nodes with no polling rx queue and at least one in adaptive mode. Type: improvement Signed-off-by: Florin Coras <fcoras@cisco.com> Change-Id: Ica1c75f605ead82b7cf74c45c6a774461008f054
Diffstat (limited to 'src/vnet')
-rw-r--r--src/vnet/interface/runtime.c13
1 files changed, 12 insertions, 1 deletions
diff --git a/src/vnet/interface/runtime.c b/src/vnet/interface/runtime.c
index 019d3ee28d0..c7631272d00 100644
--- a/src/vnet/interface/runtime.c
+++ b/src/vnet/interface/runtime.c
@@ -64,6 +64,7 @@ vnet_hw_if_update_runtime_data (vnet_main_t *vnm, u32 hw_if_index)
vnet_hw_if_rxq_poll_vector_t *pv, **d = 0;
vlib_node_state_t *per_thread_node_state = 0;
u32 n_threads = vec_len (vlib_mains);
+ u16 *per_thread_node_adaptive = 0;
int something_changed = 0;
clib_bitmap_t *pending_int = 0;
int last_int = -1;
@@ -74,6 +75,7 @@ vnet_hw_if_update_runtime_data (vnet_main_t *vnm, u32 hw_if_index)
vec_validate (d, n_threads - 1);
vec_validate_init_empty (per_thread_node_state, n_threads - 1,
VLIB_NODE_STATE_DISABLED);
+ vec_validate_init_empty (per_thread_node_adaptive, n_threads - 1, 0);
/* find out desired node state on each thread */
pool_foreach (rxq, im->hw_if_rx_queues)
@@ -89,7 +91,10 @@ vnet_hw_if_update_runtime_data (vnet_main_t *vnm, u32 hw_if_index)
continue;
if (rxq->mode == VNET_HW_IF_RX_MODE_POLLING)
- per_thread_node_state[ti] = VLIB_NODE_STATE_POLLING;
+ {
+ per_thread_node_state[ti] = VLIB_NODE_STATE_POLLING;
+ per_thread_node_adaptive[ti] = 0;
+ }
if (per_thread_node_state[ti] == VLIB_NODE_STATE_POLLING)
continue;
@@ -97,6 +102,9 @@ vnet_hw_if_update_runtime_data (vnet_main_t *vnm, u32 hw_if_index)
if (rxq->mode == VNET_HW_IF_RX_MODE_INTERRUPT ||
rxq->mode == VNET_HW_IF_RX_MODE_ADAPTIVE)
per_thread_node_state[ti] = VLIB_NODE_STATE_INTERRUPT;
+
+ if (rxq->mode == VNET_HW_IF_RX_MODE_ADAPTIVE)
+ per_thread_node_adaptive[ti] = 1;
}
/* construct per-thread polling vectors */
@@ -190,6 +198,8 @@ vnet_hw_if_update_runtime_data (vnet_main_t *vnm, u32 hw_if_index)
}
vlib_node_set_state (vm, node_index, per_thread_node_state[i]);
+ vlib_node_set_flag (vm, node_index, VLIB_NODE_FLAG_ADAPTIVE_MODE,
+ per_thread_node_adaptive[i]);
if (last_int >= 0)
clib_interrupt_resize (&rt->rxq_interrupts, last_int + 1);
@@ -219,4 +229,5 @@ vnet_hw_if_update_runtime_data (vnet_main_t *vnm, u32 hw_if_index)
vec_free (d);
vec_free (per_thread_node_state);
+ vec_free (per_thread_node_adaptive);
}