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authorFlorin Coras <fcoras@cisco.com>2018-08-16 14:57:31 -0700
committerDave Barach <openvpp@barachs.net>2018-08-17 14:46:57 +0000
commit60f1fc1c17f4e15b8a64ad0b0626e88603790eb7 (patch)
tree84e15a8506cac6094860cead0f01ac5b8e43c1a4
parentf315410543a023f8ae6ed352a342fac961d4cfa4 (diff)
vcl: unset fifo events only in read/write
Avoids accumulation of io event messages when the receiver is slow to read. Change-Id: I3a713d339a6ac0781c010be1fbad5a7963ab02c6 Signed-off-by: Florin Coras <fcoras@cisco.com>
-rw-r--r--src/vcl/vppcom.c78
1 files changed, 21 insertions, 57 deletions
diff --git a/src/vcl/vppcom.c b/src/vcl/vppcom.c
index 8572b69aa13..29936aa5207 100644
--- a/src/vcl/vppcom.c
+++ b/src/vcl/vppcom.c
@@ -1339,12 +1339,11 @@ vppcom_session_read_internal (uint32_t session_index, void *buf, int n,
continue;
}
svm_fifo_unset_event (rx_fifo);
- if (svm_fifo_is_empty (rx_fifo))
- {
- svm_msg_q_free_msg (mq, &msg);
- continue;
- }
svm_msg_q_free_msg (mq, &msg);
+ if (PREDICT_FALSE (s->session_state == STATE_CLOSE_ON_EMPTY))
+ return 0;
+ if (svm_fifo_is_empty (rx_fifo))
+ continue;
break;
}
}
@@ -1483,14 +1482,9 @@ vppcom_session_write (uint32_t session_index, void *buf, size_t n)
rv = VPPCOM_EWOULDBLOCK;
goto done;
}
- while (1)
+ while (svm_fifo_is_full (tx_fifo))
{
svm_msg_q_lock (mq);
- if (!svm_fifo_is_full (tx_fifo))
- {
- svm_msg_q_unlock (mq);
- break;
- }
while (svm_msg_q_is_empty (mq) && svm_msg_q_timedwait (mq, 10e-6))
;
svm_msg_q_sub_w_lock (mq, &msg);
@@ -1499,18 +1493,8 @@ vppcom_session_write (uint32_t session_index, void *buf, size_t n)
if (!vcl_is_tx_evt_for_session (e, session_index,
s->our_evt_q != 0))
- {
- vcl_handle_mq_ctrl_event (e);
- svm_msg_q_free_msg (mq, &msg);
- continue;
- }
- if (svm_fifo_is_full (tx_fifo))
- {
- svm_msg_q_free_msg (mq, &msg);
- continue;
- }
+ vcl_handle_mq_ctrl_event (e);
svm_msg_q_free_msg (mq, &msg);
- break;
}
}
@@ -1680,9 +1664,6 @@ vcl_select_handle_mq (svm_msg_q_t * mq, unsigned long n_bits,
case FIFO_EVENT_APP_RX:
sid = e->fifo->client_session_index;
session = vcl_session_get (sid);
- svm_fifo_unset_event (session->rx_fifo);
- if (svm_fifo_is_empty (session->rx_fifo))
- break;
if (sid < n_bits && read_map)
{
clib_bitmap_set_no_check (read_map, sid, 1);
@@ -1692,7 +1673,7 @@ vcl_select_handle_mq (svm_msg_q_t * mq, unsigned long n_bits,
case FIFO_EVENT_APP_TX:
sid = e->fifo->client_session_index;
session = vcl_session_get (sid);
- if (!session || svm_fifo_is_full (session->tx_fifo))
+ if (!session)
break;
if (sid < n_bits && write_map)
{
@@ -1703,9 +1684,6 @@ vcl_select_handle_mq (svm_msg_q_t * mq, unsigned long n_bits,
case SESSION_IO_EVT_CT_TX:
session = vcl_ct_session_get_from_fifo (e->fifo, 0);
sid = vcl_session_index (session);
- svm_fifo_unset_event (session->rx_fifo);
- if (svm_fifo_is_empty (session->rx_fifo))
- break;
if (sid < n_bits && read_map)
{
clib_bitmap_set_no_check (read_map, sid, 1);
@@ -1716,7 +1694,7 @@ vcl_select_handle_mq (svm_msg_q_t * mq, unsigned long n_bits,
case SESSION_IO_EVT_CT_RX:
session = vcl_ct_session_get_from_fifo (e->fifo, 1);
sid = vcl_session_index (session);
- if (!session || svm_fifo_is_full (session->tx_fifo))
+ if (!session)
break;
if (sid < n_bits && write_map)
{
@@ -2267,7 +2245,7 @@ vcl_epoll_wait_handle_mq (svm_msg_q_t * mq, struct epoll_event *events,
}
else
{
- if (svm_msg_q_timedwait (mq, wait_for_time / 1e3) < 0)
+ if (svm_msg_q_timedwait (mq, wait_for_time / 1e3))
{
svm_msg_q_unlock (mq);
return 0;
@@ -2290,13 +2268,9 @@ vcl_epoll_wait_handle_mq (svm_msg_q_t * mq, struct epoll_event *events,
session_events = session->vep.ev.events;
if (!(EPOLLIN & session->vep.ev.events))
break;
- svm_fifo_unset_event (session->rx_fifo);
- if (!svm_fifo_is_empty (session->rx_fifo))
- {
- add_event = 1;
- events[*num_ev].events |= EPOLLIN;
- session_evt_data = session->vep.ev.data.u64;
- }
+ add_event = 1;
+ events[*num_ev].events |= EPOLLIN;
+ session_evt_data = session->vep.ev.data.u64;
break;
case FIFO_EVENT_APP_TX:
sid = e->fifo->client_session_index;
@@ -2304,12 +2278,9 @@ vcl_epoll_wait_handle_mq (svm_msg_q_t * mq, struct epoll_event *events,
session_events = session->vep.ev.events;
if (!(EPOLLOUT & session_events))
break;
- if (!svm_fifo_is_full (session->tx_fifo))
- {
- add_event = 1;
- events[*num_ev].events |= EPOLLOUT;
- session_evt_data = session->vep.ev.data.u64;
- }
+ add_event = 1;
+ events[*num_ev].events |= EPOLLOUT;
+ session_evt_data = session->vep.ev.data.u64;
break;
case SESSION_IO_EVT_CT_TX:
session = vcl_ct_session_get_from_fifo (e->fifo, 0);
@@ -2317,13 +2288,9 @@ vcl_epoll_wait_handle_mq (svm_msg_q_t * mq, struct epoll_event *events,
session_events = session->vep.ev.events;
if (!(EPOLLIN & session->vep.ev.events))
break;
- svm_fifo_unset_event (session->rx_fifo);
- if (!svm_fifo_is_empty (session->rx_fifo))
- {
- add_event = 1;
- events[*num_ev].events |= EPOLLIN;
- session_evt_data = session->vep.ev.data.u64;
- }
+ add_event = 1;
+ events[*num_ev].events |= EPOLLIN;
+ session_evt_data = session->vep.ev.data.u64;
break;
case SESSION_IO_EVT_CT_RX:
session = vcl_ct_session_get_from_fifo (e->fifo, 1);
@@ -2331,12 +2298,9 @@ vcl_epoll_wait_handle_mq (svm_msg_q_t * mq, struct epoll_event *events,
session_events = session->vep.ev.events;
if (!(EPOLLOUT & session_events))
break;
- if (!svm_fifo_is_full (session->tx_fifo))
- {
- add_event = 1;
- events[*num_ev].events |= EPOLLOUT;
- session_evt_data = session->vep.ev.data.u64;
- }
+ add_event = 1;
+ events[*num_ev].events |= EPOLLOUT;
+ session_evt_data = session->vep.ev.data.u64;
break;
case SESSION_CTRL_EVT_ACCEPTED:
accepted_msg = (session_accepted_msg_t *) e->data;