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sledge/runtime/experiments/concurrency/README.md

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Concurrency

Question

How does increasing levels of concurrent client requests affect tail latency, throughput, and the success/error rate of sandbox execution?

Independent Variable

  • The number of concurrent client requests made at a given time

Dependent Variables

  • p50, p90, p99, and p100 latency measured in ms
  • throughput measures in requests/second
  • success rate, measures in % of requests that return a 200

Assumptions about test environment

  • You have a modern bash shell. My Linux environment shows version 4.4.20(1)-release
  • hey (https://github.com/rakyll/hey) is available in your PATH
  • You have compiled sledgert and the empty.so test workload

TODO

  • Harden scripts to validate assumptions
  • Improve error handling in scripts. If sledgrt crashes, this charges forward until it hits a divide by error when attempting to clean data that doesn't exist