 |
Increasing the instance size to 4 cores on 36x total size for 6 instances, and full load test with 172kTPS, the result here shows a different story. All strategies responded with 172kTPS throughput but LCC and BTC control the RTT time better and satisfy URLLC requirement.
Latency in the RR setups absorbed incoming pressure, which was reflected in the unacceptable RTT, avgTime:SendCy, and avgTime:InSQ to tens of milliseconds.
BCC struggles with small streams when the minimum CC is 2. With 6 instances open 3 connections per dest, each flow only transmits average throughput of about 9600TPS, this is under the threshold of a single CC connection, about 11kTPS, therefore BCC cannot control some slow flows, then the average result of BCC is extremely bad
Among front-pressure results, LCC proved itself to be a great competitor to RR. If the load is mostly lower than the capacity, utilizing back-pressure anywhere in the mesh leads to resources wasted. Front-pressure strategies are thus the most effective.
|
IEEE/ICACT20240417 Slide.23
[Big Slide]