session: full lock on session_send_evt_to_thread
Type: fix
This was causing issues in QUIC when an app client & the protocol
app compete for the worker msg_queue. Might not be ideal performance-
wise.
Change-Id: I629892253d5b5d968f31ad1d56f18463e143d6b4
Signed-off-by: Nathan Skrzypczak <nathan.skrzypczak@gmail.com>
diff --git a/src/svm/svm_fifo.c b/src/svm/svm_fifo.c
index 6b4ea68..87e019a 100644
--- a/src/svm/svm_fifo.c
+++ b/src/svm/svm_fifo.c
@@ -909,11 +909,11 @@
if (PREDICT_FALSE (cursize == 0))
return SVM_FIFO_EEMPTY;
- svm_fifo_trace_add (f, tail, total_drop_bytes, 3);
-
/* number of bytes we're going to drop */
total_drop_bytes = clib_min (cursize, len);
+ svm_fifo_trace_add (f, tail, total_drop_bytes, 3);
+
/* move head */
head = (head + total_drop_bytes) % f->size;
diff --git a/src/vnet/session/session.c b/src/vnet/session/session.c
index 8aa4af9..ea52b75 100644
--- a/src/vnet/session/session.c
+++ b/src/vnet/session/session.c
@@ -32,18 +32,10 @@
session_event_t *evt;
svm_msg_q_msg_t msg;
svm_msg_q_t *mq;
- u32 tries = 0, max_tries;
mq = session_main_get_vpp_event_queue (thread_index);
- while (svm_msg_q_try_lock (mq))
- {
- max_tries = vlib_get_current_process (vlib_get_main ())? 1e6 : 3;
- if (tries++ == max_tries)
- {
- SESSION_DBG ("failed to enqueue evt");
- return -1;
- }
- }
+ if (PREDICT_FALSE (svm_msg_q_lock (mq)))
+ return -1;
if (PREDICT_FALSE (svm_msg_q_ring_is_full (mq, SESSION_MQ_IO_EVT_RING)))
{
svm_msg_q_unlock (mq);