lwipopts: tcp parameter tuning for performance
Increased the following tcp parameters:
TCP Max segment size: 1024 -> 1460.
TCP send buffer size: 2048 -> 61320 (MSS * 42).
TCP recv buffer size: 8096 -> 61320.
Adjusted other parameters accordingly.
Especially, increased pre-allocated heap size to 1000000.
Change-Id: Idd71fbe349762a80df6c34c98978c371afa5523e
diff --git a/ports/fuchsia/include/lwipopts.h b/ports/fuchsia/include/lwipopts.h
index 4a0114c..ea61438 100644
--- a/ports/fuchsia/include/lwipopts.h
+++ b/ports/fuchsia/include/lwipopts.h
@@ -100,7 +100,7 @@
/* MEM_SIZE: the size of the heap memory. If the application will send
a lot of data that needs to be copied, this should be set high. */
-#define MEM_SIZE 24000
+#define MEM_SIZE 1000000
/* MEMP_NUM_PBUF: the number of memp struct pbufs. If the application
sends a lot of data out of ROM (or other static memory), this
@@ -120,7 +120,7 @@
#define MEMP_NUM_TCP_PCB_LISTEN 64
/* MEMP_NUM_TCP_SEG: the number of simultaneously queued TCP
segments. */
-#define MEMP_NUM_TCP_SEG 360
+#define MEMP_NUM_TCP_SEG 720
/* MEMP_NUM_SYS_TIMEOUT: the number of simulateously active
timeouts. */
#define MEMP_NUM_SYS_TIMEOUT 120
@@ -168,14 +168,14 @@
#define TCP_QUEUE_OOSEQ 1
/* TCP Maximum segment size. */
-#define TCP_MSS 1024
+#define TCP_MSS 1460
/* TCP sender buffer space (bytes). */
-#define TCP_SND_BUF 2048
+#define TCP_SND_BUF (TCP_MSS * 42)
/* TCP sender buffer space (pbufs). This must be at least = 2 *
TCP_SND_BUF/TCP_MSS for things to work. */
-#define TCP_SND_QUEUELEN (4 * TCP_SND_BUF/TCP_MSS)
+#define TCP_SND_QUEUELEN (16 * TCP_SND_BUF/TCP_MSS)
/* TCP writable space (bytes). This must be less than or equal
to TCP_SND_BUF. It is the amount of space which must be
@@ -183,7 +183,7 @@
#define TCP_SNDLOWAT (TCP_SND_BUF/2)
/* TCP receive window. */
-#define TCP_WND 8096
+#define TCP_WND TCP_SND_BUF
/* Maximum number of retransmissions of data segments. */
#define TCP_MAXRTX 12
