Vultr Sustained CPU Endurance Run
Regular 4GB 2 cores - May 05 2019

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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: Vultr
Plan: Regular 4GB 2 cores
Number of CPU cores: 2
Burstable CPU resources: no
CPU type: Virtual CPU 82d9ed4018dd


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. 7268
Coefficient of variation iterations per hour This represents the dispersion of the number of tasks per hour. It's the standard deviation 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. 8.63%
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. 48.9%
Min CPU idle Minimum percentage of CPU idle during the test. 46.4%
Average CPU steal Average percentage of CPU steal during the test. Lower is better. 0.06%
Max CPU steal Maximum percentage of CPU steal during the test. 0.15%


Number of tasks completed per hour




Date Number of iterations per hour CPU Idle % CPU Steal %
May 08, 2019 16:00 UTC 7281 50.71 0.06
May 08, 2019 14:00 UTC 7188 48.83 0.08
May 08, 2019 12:00 UTC 7295 48.78 0.06
May 08, 2019 10:00 UTC 7352 48.71 0.04
May 08, 2019 08:00 UTC 7429 48.72 0.04
May 08, 2019 06:00 UTC 7436 48.69 0.05
May 08, 2019 04:00 UTC 7500 48.94 0.04
May 08, 2019 02:00 UTC 7408 48.83 0.05
May 08, 2019 00:00 UTC 7403 48.76 0.05
May 07, 2019 22:00 UTC 7281 48.69 0.05
May 07, 2019 20:00 UTC 7150 48.7 0.07
May 07, 2019 18:00 UTC 7100 48.13 0.07
May 07, 2019 16:00 UTC 7218 48.72 0.07

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