From 315f57f4bed8aeaa375f7f326ab8723f21082e9a Mon Sep 17 00:00:00 2001
From: wu-changsheng <wuchangsheng2@huawei.com>
Date: Sun, 9 Oct 2022 22:15:19 +0800
Subject: [PATCH] avoid useless stack check wakeup event

---
 src/lstack/api/lstack_epoll.c              | 1 +
 src/lstack/core/lstack_protocol_stack.c    | 4 +++-
 src/lstack/include/lstack_protocol_stack.h | 1 +
 3 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/lstack/api/lstack_epoll.c b/src/lstack/api/lstack_epoll.c
index dcd58e7..4da88b0 100644
--- a/src/lstack/api/lstack_epoll.c
+++ b/src/lstack/api/lstack_epoll.c
@@ -50,6 +50,7 @@ void add_sock_event(struct lwip_sock *sock, uint32_t event)
     }
 
     wakeup->have_event = true;
+    sock->stack->have_event = true;
 
     if (wakeup->type == WAKEUP_POLL) {
         return;
diff --git a/src/lstack/core/lstack_protocol_stack.c b/src/lstack/core/lstack_protocol_stack.c
index 8283a41..71412b4 100644
--- a/src/lstack/core/lstack_protocol_stack.c
+++ b/src/lstack/core/lstack_protocol_stack.c
@@ -355,7 +355,7 @@ static struct protocol_stack *stack_thread_init(uint16_t queue_id)
 
 static void wakeup_stack_wait(struct protocol_stack *stack)
 {
-    if (pthread_spin_trylock(&stack->wakeup_list_lock)) {
+    if (!stack->have_event || pthread_spin_trylock(&stack->wakeup_list_lock)) {
         return;
     }
 
@@ -369,6 +369,8 @@ static void wakeup_stack_wait(struct protocol_stack *stack)
     }
 
     pthread_spin_unlock(&stack->wakeup_list_lock);
+
+    stack->have_event = false;
 }
 
 static void* gazelle_stack_thread(void *arg)
diff --git a/src/lstack/include/lstack_protocol_stack.h b/src/lstack/include/lstack_protocol_stack.h
index f58ae56..4249217 100644
--- a/src/lstack/include/lstack_protocol_stack.h
+++ b/src/lstack/include/lstack_protocol_stack.h
@@ -62,6 +62,7 @@ struct protocol_stack {
 
     struct list_node recv_list;
     struct list_node send_list;
+    bool have_event;
 
     volatile uint16_t conn_num;
     struct stats_ *lwip_stats;
-- 
2.23.0