Retune BBRv3 Max for usable throughput

README.md

@@ -8,7 +8,7 @@
 bash <(curl -fsSL https://raw.githubusercontent.com/byJoey/Actions-bbr-v3/main/install.sh)
 ```
 
-脚本会自动识别当前系统架构，从本仓库 GitHub Releases 下载匹配的 BBRv3 内核 `.deb` 包，并提供安装、指定版本安装、状态检查、加速模式切换和卸载功能。安装内核时可选择标准 BBRv3 或 BBRv3 Max 极限内核。
+脚本会自动识别当前系统架构，从本仓库 GitHub Releases 下载匹配的 BBRv3 内核 `.deb` 包，并提供安装、指定版本安装、状态检查、加速模式切换和卸载功能。安装内核时可选择标准 BBRv3 或 BBRv3 Max 激进吞吐内核。
 
 ## 支持环境
 
@@ -90,7 +90,7 @@ bash <(curl -fsSL https://raw.githubusercontent.com/byJoey/Actions-bbr-v3/main/i
 
 - 检查系统是否为 Debian/Ubuntu。
 - 检查架构是否为 `x86_64` 或 `aarch64`。
-- 让用户选择标准 BBRv3 或 BBRv3 Max 极限内核。
+- 让用户选择标准 BBRv3 或 BBRv3 Max 激进吞吐内核。
 - 从 GitHub Releases 获取当前架构和内核类型匹配的最新版本。
 - 下载非 debug 的内核 `.deb` 包。
 - 安装新内核并更新引导配置。
@@ -122,7 +122,7 @@ x86_64-7.0.11-max
 arm64-7.0.11-max
 ```
 
-其中不带 `-max` 的 tag 是标准 BBRv3 内核，带 `-max` 的 tag 是 BBRv3 Max 极限内核。Max 版会极度弱化 BBRv3 的降速、ECN、loss/inflight 收敛力度，但保留反馈闭环，只适合自有链路极限测速挑战，不建议日常生产使用。
+其中不带 `-max` 的 tag 是标准 BBRv3 内核，带 `-max` 的 tag 是 BBRv3 Max 激进吞吐内核。Max 版会提高 Startup、ProbeBW 和 cwnd 策略的进攻性，但保留 BBRv3 的 loss、ECN、inflight 和 ProbeBW 反馈闭环，只适合自有链路吞吐测试，不建议日常生产使用。
 
 ## 检查 BBRv3 状态
 

install.sh

@@ -968,7 +968,7 @@ get_arch_filter() {
 
 get_profile_label() {
     case "${1:-standard}" in
-        max) echo "BBR v3 Max（极限内核）" ;;
+        max) echo "BBR v3 Max（激进吞吐内核）" ;;
         *) echo "BBR v3 标准版" ;;
     esac
 }
@@ -994,7 +994,7 @@ select_kernel_profile() {
 
     echo -e "\033[36m请选择要安装的内核类型：\033[0m"
     echo -e "\033[33m 1. BBR v3 标准版（推荐日常使用）\033[0m"
-    echo -e "\033[33m 2. BBR v3 Max 极限版（只为暴力测速，不管稳定性）\033[0m"
+    echo -e "\033[33m 2. BBR v3 Max 激进吞吐版（自有链路测速实验）\033[0m"
     echo -n -e "\033[36m请输入选项 (1-2，默认 1): \033[0m"
     read -r PROFILE_CHOICE
 
@@ -1004,7 +1004,7 @@ select_kernel_profile() {
             ;;
         2)
             KERNEL_PROFILE="max"
-            echo -e "\033[31m警告：BBR v3 Max 会极度弱化降速与惩罚逻辑但保留反馈闭环，只适合极限测速挑战，不建议日常生产使用。\033[0m"
+            echo -e "\033[31m警告：BBR v3 Max 会提高探测和窗口策略的进攻性，但仍保留 loss/ECN/inflight 反馈闭环；只适合自有链路吞吐测试，不建议日常生产使用。\033[0m"
             ;;
         *)
             echo -e "\033[31m输入无效，取消安装。\033[0m"

scripts/apply-bbrv3-max-profile.sh

@@ -23,37 +23,37 @@ text = path.read_text()
 
 replacements = {
     r"static const u32 bbr_probe_rtt_win_ms = .*?;": "static const u32 bbr_probe_rtt_win_ms = 10000;",
-    r"static const u32 bbr_probe_rtt_cwnd_gain = .*?;": "static const u32 bbr_probe_rtt_cwnd_gain = BBR_UNIT * 2;",
+    r"static const u32 bbr_probe_rtt_cwnd_gain = .*?;": "static const u32 bbr_probe_rtt_cwnd_gain = BBR_UNIT;",
     r"static const u32 bbr_probe_rtt_mode_ms = .*?;": "static const u32 bbr_probe_rtt_mode_ms = 10;",
     r"static const u32 bbr_tso_rtt_shift = .*?;": "static const u32 bbr_tso_rtt_shift = 2;",
     r"static const int bbr_pacing_margin_percent = .*?;": "static const int bbr_pacing_margin_percent = 0;",
-    r"static const int bbr_startup_pacing_gain = .*?;": "static const int bbr_startup_pacing_gain = BBR_UNIT * 4;",
+    r"static const int bbr_startup_pacing_gain = .*?;": "static const int bbr_startup_pacing_gain = BBR_UNIT * 3;",
-    r"static const int bbr_startup_cwnd_gain = .*?;": "static const int bbr_startup_cwnd_gain = BBR_UNIT * 4;",
+    r"static const int bbr_startup_cwnd_gain = .*?;": "static const int bbr_startup_cwnd_gain = BBR_UNIT * 5 / 2;",
     r"static const int bbr_drain_gain = .*?;": "static const int bbr_drain_gain = BBR_UNIT / 2;",
-    r"static const int bbr_cwnd_gain  = .*?;": "static const int bbr_cwnd_gain  = BBR_UNIT * 4;",
+    r"static const int bbr_cwnd_gain  = .*?;": "static const int bbr_cwnd_gain  = BBR_UNIT * 5 / 2;",
     r"static const u32 bbr_cwnd_min_target = .*?;": "static const u32 bbr_cwnd_min_target = 64;",
-    r"static const u32 bbr_full_bw_thresh = .*?;": "static const u32 bbr_full_bw_thresh = BBR_UNIT * 101 / 100;",
+    r"static const u32 bbr_full_bw_thresh = .*?;": "static const u32 bbr_full_bw_thresh = BBR_UNIT * 105 / 100;",
-    r"static const u32 bbr_full_bw_cnt = .*?;": "static const u32 bbr_full_bw_cnt = 16;",
+    r"static const u32 bbr_full_bw_cnt = .*?;": "static const u32 bbr_full_bw_cnt = 8;",
-    r"static const int bbr_extra_acked_gain = .*?;": "static const int bbr_extra_acked_gain = BBR_UNIT * 4;",
+    r"static const int bbr_extra_acked_gain = .*?;": "static const int bbr_extra_acked_gain = BBR_UNIT * 2;",
     r"static const u32 bbr_extra_acked_max_us = .*?;": "static const u32 bbr_extra_acked_max_us = 750 * 1000;",
     r"static const bool bbr_precise_ece_ack = .*?;": "static const bool bbr_precise_ece_ack = true;",
     r"static const u32 bbr_ecn_max_rtt_us = .*?;": "static const u32 bbr_ecn_max_rtt_us = 0;",
-    r"static const u32 bbr_beta = .*?;": "static const u32 bbr_beta = BBR_UNIT * 5 / 100;",
+    r"static const u32 bbr_beta = .*?;": "static const u32 bbr_beta = BBR_UNIT * 20 / 100;",
-    r"static const u32 bbr_ecn_alpha_gain = .*?;": "static const u32 bbr_ecn_alpha_gain = BBR_UNIT * 1 / 64;",
+    r"static const u32 bbr_ecn_alpha_gain = .*?;": "static const u32 bbr_ecn_alpha_gain = BBR_UNIT * 1 / 32;",
-    r"static const u32 bbr_ecn_alpha_init = .*?;": "static const u32 bbr_ecn_alpha_init = BBR_UNIT * 1 / 4;",
+    r"static const u32 bbr_ecn_alpha_init = .*?;": "static const u32 bbr_ecn_alpha_init = BBR_UNIT * 1 / 2;",
-    r"static const u32 bbr_ecn_factor = .*?;": "static const u32 bbr_ecn_factor = BBR_UNIT * 5 / 100;",
+    r"static const u32 bbr_ecn_factor = .*?;": "static const u32 bbr_ecn_factor = BBR_UNIT * 20 / 100;",
-    r"static const u32 bbr_ecn_thresh = .*?;": "static const u32 bbr_ecn_thresh = BBR_UNIT * 9 / 10;",
+    r"static const u32 bbr_ecn_thresh = .*?;": "static const u32 bbr_ecn_thresh = BBR_UNIT * 7 / 10;",
-    r"static const u32 bbr_ecn_reprobe_gain = .*?;": "static const u32 bbr_ecn_reprobe_gain = BBR_UNIT;",
+    r"static const u32 bbr_ecn_reprobe_gain = .*?;": "static const u32 bbr_ecn_reprobe_gain = BBR_UNIT * 3 / 4;",
-    r"static const u32 bbr_loss_thresh = [^\n]*": "static const u32 bbr_loss_thresh = BBR_UNIT * 10 / 100;  /* max: tolerate 10% loss before backing off */",
+    r"static const u32 bbr_loss_thresh = [^\n]*": "static const u32 bbr_loss_thresh = BBR_UNIT * 3 / 100;  /* max: tolerate 3% loss before backing off */",
     r"static const bool bbr_loss_probe_recovery = .*?;": "static const bool bbr_loss_probe_recovery = true;",
-    r"static const u32 bbr_full_loss_cnt = .*?;": "static const u32 bbr_full_loss_cnt = 24;",
+    r"static const u32 bbr_full_loss_cnt = .*?;": "static const u32 bbr_full_loss_cnt = 8;",
-    r"static const u32 bbr_full_ecn_cnt = .*?;": "static const u32 bbr_full_ecn_cnt = 8;",
+    r"static const u32 bbr_full_ecn_cnt = .*?;": "static const u32 bbr_full_ecn_cnt = 4;",
-    r"static const u32 bbr_inflight_headroom = .*?;": "static const u32 bbr_inflight_headroom = BBR_UNIT * 1 / 100;",
+    r"static const u32 bbr_inflight_headroom = .*?;": "static const u32 bbr_inflight_headroom = BBR_UNIT * 10 / 100;",
-    r"static const u32 bbr_bw_probe_cwnd_gain = .*?;": "static const u32 bbr_bw_probe_cwnd_gain = 3;",
+    r"static const u32 bbr_bw_probe_cwnd_gain = .*?;": "static const u32 bbr_bw_probe_cwnd_gain = 2;",
-    r"static const u32 bbr_bw_probe_max_rounds = .*?;": "static const u32 bbr_bw_probe_max_rounds = 4;",
+    r"static const u32 bbr_bw_probe_max_rounds = .*?;": "static const u32 bbr_bw_probe_max_rounds = 16;",
-    r"static const u32 bbr_bw_probe_rand_rounds = .*?;": "static const u32 bbr_bw_probe_rand_rounds = 1;",
+    r"static const u32 bbr_bw_probe_rand_rounds = .*?;": "static const u32 bbr_bw_probe_rand_rounds = 2;",
-    r"static const u32 bbr_bw_probe_base_us = .*?;": "static const u32 bbr_bw_probe_base_us = 100 * 1000;",
+    r"static const u32 bbr_bw_probe_base_us = .*?;": "static const u32 bbr_bw_probe_base_us = 750 * 1000;",
-    r"static const u32 bbr_bw_probe_rand_us = .*?;": "static const u32 bbr_bw_probe_rand_us = 50 * 1000;",
+    r"static const u32 bbr_bw_probe_rand_us = .*?;": "static const u32 bbr_bw_probe_rand_us = 250 * 1000;",
 }
 
 missing = []
@@ -69,10 +69,10 @@ pacing_pattern = re.compile(
     re.S,
 )
 pacing_replacement = """static const int bbr_pacing_gain[] = {
-\tBBR_UNIT * 7 / 2,\t/* UP: extreme but still feedback-bound */
+\tBBR_UNIT * 3 / 2,\t/* UP: aggressive but keep BBR's feedback usable */
-\tBBR_UNIT / 2,\t\t/* DOWN: preserve a minimal drain phase */
+\tBBR_UNIT * 3 / 4,\t/* DOWN: drain the queue after probing */
-\tBBR_UNIT * 5 / 4,\t/* CRUISE: keep pressure on the pipe */
+\tBBR_UNIT,\t\t/* CRUISE: hold the measured pipe */
-\tBBR_UNIT * 2,\t\t/* REFILL: refill aggressively */
+\tBBR_UNIT * 5 / 4,\t/* REFILL: refill faster than standard BBRv3 */
 };"""
 text, pacing_count = pacing_pattern.subn(pacing_replacement, text, count=1)
 if pacing_count != 1:

scripts/build-bbrv3-max-kernel.sh

@@ -54,7 +54,7 @@ bash "$repo_root/scripts/apply-bbrv3-max-profile.sh"
 
 grep -v "MODULE_DESCRIPTION" net/ipv4/tcp_bbr.c > net/ipv4/tcp_bbr.c.tmp
 mv net/ipv4/tcp_bbr.c.tmp net/ipv4/tcp_bbr.c
-echo 'MODULE_DESCRIPTION("TCP BBR v3 Max - extreme throughput profile by Joey");' >> net/ipv4/tcp_bbr.c
+echo 'MODULE_DESCRIPTION("TCP BBR v3 Max - aggressive throughput profile by Joey");' >> net/ipv4/tcp_bbr.c
 
 IFS='.' read -r v p s <<< "$kernel_version"
 sed -i "s/^VERSION *=.*/VERSION = $v/" Makefile