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gate lwIP throughput tuning + iperf on MCU SRAM tier

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The bigger TCP_WND/PBUF_POOL/MEMP_NUM_TCP_SEG and the always-on iperf
overflowed SRAM on stm32c0/f1/wb, lpc11/13, samd11. Add LWIP_HIGH_THROUGHPUT
gate (defined in tusb_config.h, consumed by lwipopts.h) so RAM-tight MCUs
keep the original modest buffers and skip iperf, while RAM-rich targets
(max32*/stm32f2/f4/f7/h5/h7/h7rs/u5/n6, rp2040, mimxrt1xxx, nrf5x) keep
the throughput tuning needed for the iperf HIL test.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
hathach
2026-04-26 09:43:58 +07:00
parent 2dc90e364a
commit bafce337f7
2 changed files with 40 additions and 7 deletions
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22
examples/device/net_lwip_webserver/src/lwipopts.h
View File

@ -32,6 +32,14 @@
#ifndef LWIPOPTS_H__
#define LWIPOPTS_H__
// Pulls in tusb_option.h → tusb_config.h, which defines LWIP_HIGH_THROUGHPUT
// based on the target MCU's SRAM tier.
#include "tusb_option.h"
#ifndef LWIP_HIGH_THROUGHPUT
#define LWIP_HIGH_THROUGHPUT 0
#endif
/* Prevent having to link sys_arch.c (we don't test the API layers in unit tests) */
#define NO_SYS 1
#define MEM_ALIGNMENT 4
@ -49,7 +57,15 @@
#define TCP_MSS (1500 /*mtu*/ - 20 /*iphdr*/ - 20 /*tcphhr*/)
#define TCP_SND_BUF (4 * TCP_MSS)
#define TCP_WND (8 * TCP_MSS)
#if LWIP_HIGH_THROUGHPUT
#define TCP_WND (8 * TCP_MSS)
#define PBUF_POOL_SIZE 8
// Must grow in step with TCP_SND_BUF (default MEMP_NUM_TCP_SEG=16 caps TCP_SND_BUF at 4*MSS).
#define MEMP_NUM_TCP_SEG 16
#else
#define TCP_WND (4 * TCP_MSS)
#define PBUF_POOL_SIZE 4
#endif
#define ETHARP_SUPPORT_STATIC_ENTRIES 1
@ -60,10 +76,6 @@
#define LWIP_SINGLE_NETIF 1
#define LWIP_NETIF_LINK_CALLBACK 1
#define PBUF_POOL_SIZE 8
// Must grow in step with TCP_SND_BUF (default MEMP_NUM_TCP_SEG=16 caps TCP_SND_BUF at 4*MSS).
#define MEMP_NUM_TCP_SEG 16
#define HTTPD_USE_CUSTOM_FSDATA 0
#define LWIP_MULTICAST_PING 1

25
examples/device/net_lwip_webserver/src/tusb_config.h
View File

@ -97,7 +97,24 @@ extern "C" {
#endif
#endif
#ifndef INCLUDE_IPERF
// MCU SRAM tier — drives the bigger lwIP buffers in lwipopts.h, the larger
// NCM OUT NTB size below, and whether iperf is built. Small-RAM MCUs
// (stm32c0/f1/wb, lpc11/13, samd11) keep modest defaults to fit.
#ifndef LWIP_HIGH_THROUGHPUT
#if TU_CHECK_MCU(OPT_MCU_MAX32650, OPT_MCU_MAX32666, OPT_MCU_MAX32690, OPT_MCU_MAX78002) || \
TU_CHECK_MCU(OPT_MCU_STM32F2, OPT_MCU_STM32F4, OPT_MCU_STM32F7) || \
TU_CHECK_MCU(OPT_MCU_STM32H5, OPT_MCU_STM32H7, OPT_MCU_STM32H7RS) || \
TU_CHECK_MCU(OPT_MCU_STM32U5, OPT_MCU_STM32N6) || \
TU_CHECK_MCU(OPT_MCU_RP2040) || \
TU_CHECK_MCU(OPT_MCU_MIMXRT1XXX) || \
TU_CHECK_MCU(OPT_MCU_NRF5X)
#define LWIP_HIGH_THROUGHPUT 1
#else
#define LWIP_HIGH_THROUGHPUT 0
#endif
#endif
#if LWIP_HIGH_THROUGHPUT && !defined(INCLUDE_IPERF)
#define INCLUDE_IPERF
#endif
@ -111,7 +128,11 @@ extern "C" {
// Must be >> MTU
// Can be set to smaller values if wNtbOutMaxDatagrams==1
#define CFG_TUD_NCM_OUT_NTB_MAX_SIZE (3 * TCP_MSS + 100)
#if LWIP_HIGH_THROUGHPUT
#define CFG_TUD_NCM_OUT_NTB_MAX_SIZE (3 * TCP_MSS + 100)
#else
#define CFG_TUD_NCM_OUT_NTB_MAX_SIZE (2 * TCP_MSS + 100)
#endif
// Number of NCM transfer blocks for reception side
#ifndef CFG_TUD_NCM_OUT_NTB_N