How Netflix Tunes EC2 Instances for Performance

CMP325 talk for AWS re:Invent 2017, by Brendan Gregg. " At Netflix we make the best use of AWS EC2 instance types and features to create a high performance cloud, achieving near bare metal speed for our workloads. This session will summarize the configuration, tuning, and activities for delivering the fastest possible EC2 instances, and will help other EC2 users improve performance, reduce latency

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Clocksourceをhpet,xen からtsc固定化のチューニングしてて、数年前にhpetで苦労した記憶が蘇った。 ↓core数が多くgettimeofdayを大量発行するappがあると効果絶大です。 Best case example(so far): CPU usage reduced by 30%, and app latency reduced by 43%.