LayerStack Sustained CPU Endurance Run
HM24-HK - Jul 11 2022

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The sustained CPU endurance test runs a cpu intensive task in a loop for 24 hours. As maxing out the cpu might be considered abusive, the tests aims to use no more than 50% of each cpu core on the VPS.

The purpose of this type of test is

  • first to evaluate the speed to the VPS,
  • second to evaluate the stability over time of the cpu available to the VPS
  • and third to detect VPS where the CPU is throttled and the performance goes down over time after cpu utilization goes over a threshold the provider considers excessive for a particular plan.

The performance is measured at regular intervals in terms of tasks executed per hour, amount of idle cpu and amount of "cpu steal".

Provider: LayerStack
Plan: HM24-HK
Number of CPU cores: 2
Burstable CPU resources: no
CPU type: AMD EPYC-Milan Processor


DescriptionValue
Target CPU usage Overall CPU that the endurance test tries to use across all CPU cores on the VM. 50%
Average iterations per hour Average number of tasks executed per hour. It represents how much work the VPS was able to achieve per hour. Higher numbers are better. 6138
Coefficient of variation iterations per hour This represents the dispersion of the number of tasks per hour. It's the standard variation divided by the mean number of tasks per hour. It's an indicator on stability of the performance of the VPS. A low standard deviation means the VPS speed stayed close to constant. A high standard deviation means performance varied significantly during the test. 2.39%
Average CPU idle Average percentage of CPU that was idle during the test. This number should be close to 50% unless the CPU is being throttled like in burstable VPS plans. 49.4%
Min CPU idle Minimum percentage of CPU idle during the test. 48.6%
Average CPU steal Average percentage of CPU steal during the test. Lower is better. 0.04%
Max CPU steal Maximum percentage of CPU steal during the test. 0.08%


Number of tasks completed per hour




Date Number of iterations per hour CPU Idle % CPU Steal %
July 12, 2022 18:00 UTC 6136 59.16 0.03
July 12, 2022 16:00 UTC 6032 49.4 0.05
July 12, 2022 14:00 UTC 5896 49.39 0.06
July 12, 2022 12:00 UTC 5979 49.39 0.05
July 12, 2022 10:00 UTC 6032 49.34 0.05
July 12, 2022 08:00 UTC 6073 49.42 0.04
July 12, 2022 06:00 UTC 6141 49.39 0.04
July 12, 2022 04:00 UTC 6179 49.4 0.03
July 12, 2022 02:00 UTC 6268 49.32 0.03
July 12, 2022 00:00 UTC 6297 49.46 0.03
July 11, 2022 22:00 UTC 6301 49.52 0.03
July 11, 2022 20:00 UTC 6265 49.52 0.03
July 11, 2022 18:00 UTC 6217 49.42 0.03

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