File _service:obs_scm:0031-refactor-add-event-limit-... of Package lwip

File _service:obs_scm:0031-refactor-add-event-limit-send-pkts-num.patch of Package lwip

From 87166f699e0febd36b81d914713b770119ead471 Mon Sep 17 00:00:00 2001
From: wuchangsheng <wuchangsheng2@huawei.com>
Date: Thu, 6 Oct 2022 20:16:06 +0800
Subject: [PATCH] refactor add event, limit send pkts num

---
 src/api/sockets.c       | 4 ++--
 src/core/tcp_out.c      | 8 ++++++++
 src/include/eventpoll.h | 3 ++-
 3 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/src/api/sockets.c b/src/api/sockets.c
index 4d4cea1..d5b69eb 100644
--- a/src/api/sockets.c
+++ b/src/api/sockets.c
@@ -2665,7 +2665,7 @@ event_callback(struct netconn *conn, enum netconn_evt evt, u16_t len)
       }
 #if USE_LIBOS
       if (conn->acceptmbox != NULL && !sys_mbox_empty(conn->acceptmbox)) {
-        add_epoll_event(conn, POLLIN);
+        add_sock_event(sock, POLLIN);
       }
 #endif
       break;
@@ -2686,7 +2686,7 @@ event_callback(struct netconn *conn, enum netconn_evt evt, u16_t len)
     case NETCONN_EVT_ERROR:
       sock->errevent = 1;
 #if USE_LIBOS
-      add_epoll_event(conn, EPOLLERR);
+      add_sock_event(sock, EPOLLERR);
 #endif
       break;
     default:
diff --git a/src/core/tcp_out.c b/src/core/tcp_out.c
index 1b0af8d..dd780d3 100644
--- a/src/core/tcp_out.c
+++ b/src/core/tcp_out.c
@@ -1358,8 +1358,16 @@ tcp_output(struct tcp_pcb *pcb)
     for (; useg->next != NULL; useg = useg->next);
   }
   /* data available and window allows it to be sent? */
+#if USE_LIBOS
+  /* avoid send cose too much time, limit send pkts num max 10 */
+  uint16_t send_pkt = 0;
+  while (seg != NULL && send_pkt < 10 &&
+         lwip_ntohl(seg->tcphdr->seqno) - pcb->lastack + seg->len <= wnd) {
+    send_pkt++;
+#else
   while (seg != NULL &&
          lwip_ntohl(seg->tcphdr->seqno) - pcb->lastack + seg->len <= wnd) {
+#endif
     LWIP_ASSERT("RST not expected here!",
                 (TCPH_FLAGS(seg->tcphdr) & TCP_RST) == 0);
     /* Stop sending if the nagle algorithm would prevent it
diff --git a/src/include/eventpoll.h b/src/include/eventpoll.h
index aacc1d2..a10c84b 100644
--- a/src/include/eventpoll.h
+++ b/src/include/eventpoll.h
@@ -63,7 +63,8 @@ struct libos_epoll {
     int efd; /* eventfd */
 };
 
-extern void add_epoll_event(struct netconn*, uint32_t);
+struct lwip_sock;
+extern void add_sock_event(struct lwip_sock *sock, uint32_t event);
 extern int32_t lstack_epoll_close(int32_t);
 
 #endif /* __EVENTPOLL_H__ */
-- 
2.27.0