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authorFlorin Coras <fcoras@cisco.com>2020-02-27 04:32:51 +0000
committerDave Barach <openvpp@barachs.net>2020-04-04 17:34:13 +0000
commited8db52539a8d8239a9a43bea53328d25eb47f0d (patch)
treef0bd25f356fa2f10aaab8e51eff3dfc3fd7637ec /src/vnet/session
parent3e07a4a1e843267892dc291a833d93bd70597011 (diff)
session tls: improve app transports tx scheduling
Type: improvement - allow apps to request rescheduling of tx events via SESSION_F_CUSTOM_TX flag - limit max burst per session custom tx dispatch In tls - use the new infra to reschedule tx events - use max burst bytes as upper limit to number of bytes to be encrypted Signed-off-by: Florin Coras <fcoras@cisco.com> Change-Id: I544a5a3337af7ebdff3406b776adf30cf96ebf3c
Diffstat (limited to 'src/vnet/session')
-rw-r--r--src/vnet/session/session_node.c30
-rw-r--r--src/vnet/session/transport.h1
2 files changed, 27 insertions, 4 deletions
diff --git a/src/vnet/session/session_node.c b/src/vnet/session/session_node.c
index c2a6ec921af..30eca1e6577 100644
--- a/src/vnet/session/session_node.c
+++ b/src/vnet/session/session_node.c
@@ -1066,15 +1066,37 @@ session_tx_fifo_dequeue_and_snd (session_worker_t * wrk,
int
session_tx_fifo_dequeue_internal (session_worker_t * wrk,
vlib_node_runtime_t * node,
- session_evt_elt_t * e, int *n_tx_packets)
+ session_evt_elt_t * elt, int *n_tx_packets)
{
session_t *s = wrk->ctx.s;
+ u32 n_packets, max_pkts;
if (PREDICT_FALSE (s->session_state >= SESSION_STATE_TRANSPORT_CLOSED))
return 0;
- svm_fifo_unset_event (s->tx_fifo);
- return transport_custom_tx (session_get_transport_proto (s), s,
- VLIB_FRAME_SIZE - *n_tx_packets);
+
+ /* Clear custom-tx flag used to request reschedule for tx */
+ s->flags &= ~SESSION_F_CUSTOM_TX;
+
+ max_pkts = clib_min (VLIB_FRAME_SIZE - *n_tx_packets,
+ TRANSPORT_PACER_MAX_BURST_PKTS);
+ n_packets = transport_custom_tx (session_get_transport_proto (s), s,
+ max_pkts);
+ *n_tx_packets -= n_packets;
+
+ if (svm_fifo_max_dequeue_cons (s->tx_fifo)
+ || (s->flags & SESSION_F_CUSTOM_TX))
+ {
+ session_evt_add_old (wrk, elt);
+ }
+ else
+ {
+ svm_fifo_unset_event (s->tx_fifo);
+ if (svm_fifo_max_dequeue_cons (s->tx_fifo))
+ if (svm_fifo_set_event (s->tx_fifo))
+ session_evt_add_head_old (wrk, elt);
+ }
+
+ return n_packets;
}
always_inline session_t *
diff --git a/src/vnet/session/transport.h b/src/vnet/session/transport.h
index 53a0dd6c14e..6dc6984cdf4 100644
--- a/src/vnet/session/transport.h
+++ b/src/vnet/session/transport.h
@@ -22,6 +22,7 @@
#define TRANSPORT_PACER_MIN_MSS 1460
#define TRANSPORT_PACER_MIN_BURST TRANSPORT_PACER_MIN_MSS
#define TRANSPORT_PACER_MAX_BURST (43 * TRANSPORT_PACER_MIN_MSS)
+#define TRANSPORT_PACER_MAX_BURST_PKTS 43
#define TRANSPORT_PACER_MIN_IDLE 100
#define TRANSPORT_PACER_IDLE_FACTOR 0.05