Vultr Sustained CPU Endurance Run
High Frequency 1GB - Mar 19 2020

Go to Vultr



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: High Frequency 1GB
Number of CPU cores: 1
Burstable CPU resources: no
CPU type: Intel Core Processor (Skylake, IBRS)


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. 3036
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. 1.00%
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. 46.5%
Min CPU idle Minimum percentage of CPU idle during the test. 41.0%
Average CPU steal Average percentage of CPU steal during the test. Lower is better. 0.01%
Max CPU steal Maximum percentage of CPU steal during the test. 0.02%


Number of tasks completed per hour




Date Number of iterations per hour CPU Idle % CPU Steal %
March 23, 2020 00:00 UTC 3040 56.08 0.01
March 22, 2020 22:00 UTC 3052 48.83 0.01
March 22, 2020 20:00 UTC 3046 48.91 0.01
March 22, 2020 18:00 UTC 3042 47.97 0.01
March 22, 2020 16:00 UTC 3061 46.51 0.01
March 22, 2020 14:00 UTC 3037 47.37 0.01
March 22, 2020 12:00 UTC 3022 45.36 0.01
March 22, 2020 10:00 UTC 2988 44.92 0.01
March 22, 2020 08:00 UTC 3036 45.7 0.01
March 22, 2020 06:00 UTC 3038 44.78 0.01
March 22, 2020 04:00 UTC 3036 45.37 0.01
March 22, 2020 02:00 UTC 3036 45.94 0.01
March 22, 2020 00:00 UTC 3038 44.9 0.01

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