xref: /third_party/lwip/0019-gazelle-reduce-copy-in-send.patch

From 05bfdb54fc744d835c8b3b50b54d220fe7e87277 Mon Sep 17 00:00:00 2001
From: wuchangsheng <wuchangsheng2@huawei.com>
Date: Mon, 7 Mar 2022 21:10:06 +0800
Subject: [PATCH] reduce copy in send

---
 src/core/pbuf.c         | 5 +++++
 src/include/lwip/pbuf.h | 3 +++
 2 files changed, 8 insertions(+)

diff --git a/src/core/pbuf.c b/src/core/pbuf.c
index 27afc28..cd6b558 100644
--- a/src/core/pbuf.c
+++ b/src/core/pbuf.c
@@ -281,6 +281,10 @@ pbuf_alloc(pbuf_layer layer, u16_t length, pbuf_type type)
       }
 
       /* If pbuf is to be allocated in RAM, allocate memory for it. */
+#if USE_LIBOS
+      /* alloc mbuf to reduce copy in sending */
+      p = lwip_alloc_pbuf(layer, length, type);
+#else
       p = (struct pbuf *)mem_malloc(alloc_len);
       if (p == NULL) {
         return NULL;
@@ -289,6 +293,7 @@ pbuf_alloc(pbuf_layer layer, u16_t length, pbuf_type type)
                              length, length, type, 0);
       LWIP_ASSERT("pbuf_alloc: pbuf->payload properly aligned",
                   ((mem_ptr_t)p->payload % MEM_ALIGNMENT) == 0);
+#endif
       break;
     }
     default:
diff --git a/src/include/lwip/pbuf.h b/src/include/lwip/pbuf.h
index e5daf96..3894574 100644
--- a/src/include/lwip/pbuf.h
+++ b/src/include/lwip/pbuf.h
@@ -272,6 +272,9 @@ void pbuf_free_ooseq(void);
 /* Initializes the pbuf module. This call is empty for now, but may not be in future. */
 #define pbuf_init()
 
+#if USE_LIBOS
+struct pbuf *lwip_alloc_pbuf(pbuf_layer l, u16_t length, pbuf_type type);
+#endif
 struct pbuf *pbuf_alloc(pbuf_layer l, u16_t length, pbuf_type type);
 struct pbuf *pbuf_alloc_reference(void *payload, u16_t length, pbuf_type type);
 #if LWIP_SUPPORT_CUSTOM_PBUF
-- 
2.30.0