[talawahtech]

I didn't make any coordinated omission changes (I really didn't make many changes in general), so twrk does what wrk does. It attempts to correct it after the fact by looking for requests that took twice as long as average and doing some backfilling[1].

I am no expert where coordinated omission is concerned, but my understanding is that it is most problematic in scenarios where your p90+ latency is high. Looking at the results for the 1.2M req/s test you have the following latencies:

  p50     203.00us
  p90     236.00us
  p99     265.00us
  p99.99  317.00us
  pMAX    626.00us

If you were to apply wrk's coordinated omission hack to these result, the backfilling only starts for requests that took longer than p50 x 2 (roughly) = 406us, which is probably somewhere between p99.999 and pMAX; a very, very small percentage.

I am not claiming that wrk's hack is "correct", just that I don't think coordinated omission is a major concern for *this specific workload/environment*

1. https://github.com/wg/wrk/blob/a211dd5a7050b1f9e8a9870b95513...