Presentations

How NOT to Measure Latency

Azul CTO Gil Tene demonstrates and discusses some false assumptions and measurement techniques that lead to incorrect results, and covers simple ways to sanity check and correct these situations. He discusses the fallacy of using standard deviation measurements, the strongly multi-modal nature of latency, common discontinuities found in most computing platforms, and how back pressure and coordinated data omission issues can skew measurement results dramatically.


Title: How NOT to Measure Latency

Speaker: Gil Tene, CTO and Co-founder, Azul Systems

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Abstract: In this presentation, Gil Tene discusses some common pitfalls encountered in measuring and characterizing latency. Gil demonstrates and discusses some false assumptions and measurement techniques that lead to dramatically incorrect reporting results, and covers simple ways to sanity check and correct these situations. He discusses the fallacy of using standard deviation measurements, the strongly multi-modal nature of latency, common discontinuities found in most computing platforms, and how back pressure and coordinated data omission issues can literally skew measurement results by orders of magnitude. Gil introduces and demonstrates how simple and recently open sourced tools can be used to improve and gain higher confidence in both latency measurement and reporting.

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