【TCP 迷之调参】V4 发布了，这次炼出了更玄的东西

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permitted by applicable law.
Last login: Sun Jun  1 18:05:56 2025 from localhost
root@beautiful-wall-1:~# sudo sysctl -p
kernel.pid_max = 65535
kernel.panic = 1
kernel.sysrq = 1
kernel.core_pattern = core_%e
kernel.printk = 3 4 1 3
kernel.numa_balancing = 0
kernel.sched_autogroup_enabled = 0
vm.swappiness = 5
vm.dirty_ratio = 5
vm.dirty_background_ratio = 2
vm.panic_on_oom = 1
vm.overcommit_memory = 1
vm.min_free_kbytes = 640000
net.core.default_qdisc = cake
net.core.netdev_max_backlog = 80000
net.core.rmem_max = 1174405120
sysctl: setting key "net.core.wmem_max": Invalid argument
net.core.rmem_default = 262144
net.core.wmem_default = 262144
net.core.somaxconn = 40960
net.core.optmem_max = 262144
net.ipv4.tcp_fastopen = 3
net.ipv4.tcp_timestamps = 1
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_fin_timeout = 10
net.ipv4.tcp_slow_start_after_idle = 0
net.ipv4.tcp_max_tw_buckets = 32768
net.ipv4.tcp_sack = 1
net.ipv4.tcp_fack = 1
net.ipv4.tcp_rmem = 32768 262144 1174405120
sysctl: setting key "net.ipv4.tcp_wmem": Invalid argument
net.ipv4.tcp_mtu_probing = 1
net.ipv4.tcp_congestion_control = bbr
net.ipv4.tcp_notsent_lowat = 524288
net.ipv4.tcp_window_scaling = 1
net.ipv4.tcp_adv_win_scale = 19
net.ipv4.tcp_moderate_rcvbuf = 1
net.ipv4.tcp_no_metrics_save = 1
sysctl: cannot stat /proc/sys/net/ipv4/tcp_init_cwnd: No such file or directory
net.ipv4.tcp_max_syn_backlog = 327680
net.ipv4.tcp_max_orphans = 32768
net.ipv4.tcp_synack_retries = 2
net.ipv4.tcp_syn_retries = 2
net.ipv4.tcp_abort_on_overflow = 0
net.ipv4.tcp_stdurg = 0
net.ipv4.tcp_rfc1337 = 0
net.ipv4.tcp_syncookies = 1
net.ipv4.ip_local_port_range = 1024 65535
net.ipv4.ip_no_pmtu_disc = 0
net.ipv4.route.gc_timeout = 100
net.ipv4.neigh.default.gc_stale_time = 120
net.ipv4.neigh.default.gc_thresh3 = 4096
net.ipv4.neigh.default.gc_thresh2 = 2048
net.ipv4.neigh.default.gc_thresh1 = 512
net.ipv4.icmp_echo_ignore_broadcasts = 1
net.ipv4.icmp_ignore_bogus_error_responses = 1
net.ipv4.conf.all.rp_filter = 1
net.ipv4.conf.default.rp_filter = 1
net.ipv4.conf.all.arp_announce = 2
net.ipv4.conf.default.arp_announce = 2
net.ipv4.conf.all.arp_ignore = 1
net.ipv4.conf.default.arp_ignore = 1

好的，根据你提供的 sysctl -p 的输出，这里有一些错误信息：

sysctl: setting key "net.core.wmem_max": Invalid argument: 这表示设置 net.core.wmem_max 的时候出现了问题，参数无效。这可能是因为你给 net.core.wmem_max 设置了一个不正确的值，或者格式有问题。
sysctl: setting key "net.ipv4.tcp_wmem": Invalid argument: 与上一个错误类似，这表示设置 net.ipv4.tcp_wmem 的时候出现了问题，参数无效。net.ipv4.tcp_wmem 通常需要三个值：TCP 写操作的最小、默认和最大缓冲区大小。这个错误表明你提供的这三个值可能存在问题。
sysctl: cannot stat /proc/sys/net/ipv4/tcp_init_cwnd: No such file or directory: 这表示系统找不到文件 /proc/sys/net/ipv4/tcp_init_cwnd。这个参数用于设置 TCP 连接的初始拥塞窗口大小。这个文件不存在可能意味着你的内核不支持这个特定的设置，或者它可能位于其他地方。