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fix(qos): harmonize SQM and CAKE cooperation, resolve bufferbloat degradation

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Dushnilin
2026-09-14 17:03:45 +03:00
parent 24c11bbca8
commit 7375e26b44
11 changed files with 249 additions and 36 deletions
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tachyon/files/usr/lib/nft/apply.uc
+8 -3
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@@ -1700,7 +1700,8 @@ function nft_create_runtime_base(table, localv4_set, common_set, port_set, ip_po
// QoS Low-Latency Gaming & Voice Acceleration Engine
let qos_setting = uci_settings().qos_priority_engine;
let qos_enabled = (qos_setting == "1" || (qos_setting != "0" && !sqm_service_enabled()));
let sqm_active = sqm_service_enabled();
let qos_enabled = (qos_setting == "1" || qos_setting != "0");
if (qos_enabled) {
// Voice & Discord RTC (DSCP EF 0x2e)
@@ -1711,8 +1712,12 @@ function nft_create_runtime_base(table, localv4_set, common_set, port_set, ip_po
nft_add_rule(table, "mangle_forward", [ "udp", "dport", "{ 3074, 7000-9000, 27000-27050, 28960 }", "ip", "dscp", "set", "0x22" ]);
nft_add_rule(table, "mangle_output", [ "udp", "dport", "{ 3074, 7000-9000, 27000-27050, 28960 }", "ip", "dscp", "set", "0x22" ]);
// Pure TCP ACK Acceleration (DSCP CS2) - only small packets without payload
nft_add_rule(table, "mangle_forward", [ "tcp", "flags", "&", "(fin|syn|rst|ack)", "==", "ack", "meta", "length", "<=", "64", "ip", "dscp", "set", "cs2" ]);
// Pure TCP ACK Acceleration (DSCP CS2) - only small packets without payload.
// When SQM (CAKE) is active, CAKE's built-in ack-filter handles ACKs natively,
// and setting CS2 on ACKs pollutes CAKE's Video tin (Tin 2) in diffserv4.
if (!sqm_active) {
nft_add_rule(table, "mangle_forward", [ "tcp", "flags", "&", "(fin|syn|rst|ack)", "==", "ack", "meta", "length", "<=", "64", "ip", "dscp", "set", "cs2" ]);
}
}
return true;