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Network Performance Whitepapers: Retransmits, MTU, and PPS

🔍 This post introduces the third installment in Google Cloud’s Network Performance Decoded series, summarizing three whitepapers that examine TCP retransmission tuning, the effects of headers and MTU on effective throughput, and techniques to measure packets-per-second with netperf. The guidance highlights practical kernel tuning (for example, rto_min and thin linear timeouts), how protocol and cloud-specific headers reduce payload efficiency, and rigorous netperf methodologies for sizing tests and correcting skew when measuring PPS. While examples reference Google Cloud features such as Protective ReRoute, the recommendations are broadly applicable to cloud deployments seeking improved responsiveness and accurate benchmarking.