tcp_delack_min linux tcp内核参数在哪里？

我使用2.6.9-89.ELsmp#1 SMP周一6月22日12:31:33 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux 我想控制tcp延迟确认时间。 但是，我找不到tcp_delack_min参数

sysctl -a | grep tcp sunrpc.tcp_slot_table_entries = 16 net.ipv4.tcp_slow_start_after_idle = 1 net.ipv4.tcp_workaround_signed_windows = 1 net.ipv4.tcp_bic_beta = 819 net.ipv4.tcp_tso_win_divisor = 8 net.ipv4.tcp_moderate_rcvbuf = 1 net.ipv4.tcp_bic_low_window = 14 net.ipv4.tcp_bic_fast_convergence = 1 net.ipv4.tcp_bic = 1 net.ipv4.tcp_vegas_gamma = 2 net.ipv4.tcp_vegas_beta = 6 net.ipv4.tcp_vegas_alpha = 2 net.ipv4.tcp_vegas_cong_avoid = 0 net.ipv4.tcp_westwood = 0 net.ipv4.tcp_no_metrics_save = 0 net.ipv4.tcp_low_latency = 0 net.ipv4.tcp_frto = 0 net.ipv4.tcp_tw_reuse = 0 net.ipv4.tcp_adv_win_scale = 2 net.ipv4.tcp_app_win = 31 net.ipv4.tcp_rmem = 4096 87380 174760 net.ipv4.tcp_wmem = 4096 16384 131072 net.ipv4.tcp_mem = 786432 1048576 1572864 net.ipv4.tcp_dsack = 1 net.ipv4.tcp_ecn = 0 net.ipv4.tcp_reordering = 3 net.ipv4.tcp_fack = 1 net.ipv4.tcp_orphan_retries = 0 net.ipv4.tcp_max_syn_backlog = 10000 net.ipv4.tcp_rfc1337 = 0 net.ipv4.tcp_stdurg = 0 net.ipv4.tcp_abort_on_overflow = 0 net.ipv4.tcp_tw_recycle = 0 net.ipv4.tcp_syncookies = 0 net.ipv4.tcp_fin_timeout = 60 net.ipv4.tcp_retries2 = 15 net.ipv4.tcp_retries1 = 3 net.ipv4.tcp_keepalive_intvl = 75 net.ipv4.tcp_keepalive_probes = 9 net.ipv4.tcp_keepalive_time = 7200 net.ipv4.tcp_max_tw_buckets = 180000 net.ipv4.tcp_max_orphans = 262144 net.ipv4.tcp_synack_retries = 5 net.ipv4.tcp_syn_retries = 5 net.ipv4.tcp_retrans_collapse = 1 net.ipv4.tcp_sack = 1 net.ipv4.tcp_window_scaling = 1 net.ipv4.tcp_timestamps = 1 sysctl-a | grep tcp sunrpc.tcp\u插槽\u表\u条目=16 net.ipv4.tcp\u慢速\u空闲后启动\u=1 net.ipv4.tcp\u解决方法\u已签名\u windows=1 net.ipv4.tcp_bic_beta=819 net.ipv4.tcp_tso_win_除数=8 net.ipv4.tcp_medium_rcvbuf=1 net.ipv4.tcp\u bic\u low\u window=14 net.ipv4.tcp\u bic\u fast\u convergence=1 net.ipv4.tcp_bic=1 net.ipv4.tcp_vegas_gamma=2 net.ipv4.tcp_vegas_beta=6 net.ipv4.tcp_vegas_alpha=2 net.ipv4.tcp_vegas_cong_avoid=0 net.ipv4.tcp_westwood=0 net.ipv4.tcp\u无\u度量值\u保存=0 net.ipv4.tcp\u低延迟=0 net.ipv4.tcp_frto=0 net.ipv4.tcp_tw_重用=0 net.ipv4.tcp_adv_win_scale=2 net.ipv4.tcp_app_win=31 net.ipv4.tcp_rmem=4096 87380 174760 net.ipv4.tcp_wmem=4096 16384 131072 net.ipv4.tcp_mem=786432 1048576 1572864 net.ipv4.tcp_dsack=1 net.ipv4.tcp_ecn=0 net.ipv4.tcp_重新排序=3 net.ipv4.tcp_fack=1 net.ipv4.tcp\u孤立\u重试次数=0 net.ipv4.tcp_max_syn_backlog=10000 net.ipv4.tcp_rfc1337=0 net.ipv4.tcp\u stdurg=0 net.ipv4.tcp\u溢出时中止\u=0 net.ipv4.tcp_tw_recycle=0 net.ipv4.tcp_syncookies=0 net.ipv4.tcp\u fin\u超时=60 net.ipv4.tcp_重试2=15 net.ipv4.tcp_重试1=3 net.ipv4.tcp\u keepalive\u intvl=75 net.ipv4.tcp_keepalive_probe=9 net.ipv4.tcp_keepalive_time=7200 net.ipv4.tcp_max_tw_bucket=180000 net.ipv4.tcp_max_孤儿=262144 net.ipv4.tcp\u synack\u重试次数=5次 net.ipv4.tcp_syn_重试次数=5 net.ipv4.tcp_retrans_collapse=1 net.ipv4.tcp\u sack=1 net.ipv4.tcp\u窗口\u缩放=1 net.ipv4.tcp_时间戳=1

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在内核源代码中，tcp\u delack\u min在哪里？

：

/include/net/tcp.h:#定义tcp_DELACK_MAX（（无符号）（HZ/5））
/*发送ACK之前的最大延迟时间*/

/include/net/tcp.h:#定义tcp_DELACK_MIN（（未签名）（HZ/25））
/*发送ACK之前的最小延迟时间*/

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在内核源代码中：

/include/net/tcp.h:#定义tcp_DELACK_MAX（（无符号）（HZ/5））
/*发送ACK之前的最大延迟时间*/

/include/net/tcp.h:#定义tcp_DELACK_MIN（（未签名）（HZ/25））
/*发送ACK之前的最小延迟时间*/

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它只在某些内核分支中可用，这些分支大多是实时的。许多与此内核参数相关的文档都提到了一些RHEL机器将使用的MRG（消息传递实时网格）内核变体。

它仅在某些（主要是实时的）内核分支中可用。许多与此内核参数相关的文档都提到了一些RHEL机器将使用的MRG（消息传递实时网格）内核变体