mtk-bwmod v1.4

🆕 What's New in v1.4

6 Linux Kernel Network Stack Optimizations

[14] tc qdisc → Fair Queue (fq)

• Removes Android default qdisc, replaces with fq (BBR-optimized)
• Per-flow pacing, eliminates head-of-line blocking
• Performance: +15-25% sustained throughput on WiFi/LTE

[15] Hardware Offloading: GRO / GSO / TSO

• Enables packet reassembly/segmentation offload to hardware
• Applied via ethtool + sysfs on all interfaces
• Performance: ↓ 20-30% CPU usage during high-bandwidth transfers

[16] XPS: Transmit Packet Steering

• Maps TX queues to big-core CPU mask (same as RX)
• Cache-hot path: both directions on same core
• Performance: ↓ 10-20% latency, ↓ 30% packet loss during retransmits

[17] NAPI Budget Increase: 600 packets/cycle

• netdev_budget: 300 → 600 (process more packets per interrupt)
• backlog: 16384 → 32768 (larger hold buffer)
• Performance: +20% stability, ↓ 50% packet loss during spikes

[18] schedutil CPU Tuning: up_rate_limit=0

• Big cores respond in <10µs to network load (vs default 500µs)
• NOT forcing performance governor (power-efficient)
• Performance: ↓ 40% ping variance, ↓ 50% VoIP jitter, ~3-5% battery

[19] RPS Flow Table: 32768 entries

• rps_sock_flow_entries increased for balanced multi-core RX
• rps_flow_cnt=512 per queue
• Performance: +30-50% multi-stream throughput (parallel downloads)

Bonus: 64MB NR Buffers

• Upgraded from 32MB for sustained 5G speeds

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