Alibaba Cloud Sustained CPU Endurance Run
ecs.t5-lc1m1.small - Nov 16 2018

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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: Alibaba Cloud
Plan: ecs.t5-lc1m1.small
Number of CPU cores: 1
Burstable CPU resources: yes (20% baseline)
CPU type: Intel(R) Xeon(R) Platinum 8163 CPU @ 2.50GHz


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. 957
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. 98.93%
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. 40.6%
Min CPU idle Minimum percentage of CPU idle during the test. 0.0%
Average CPU steal Average percentage of CPU steal during the test. Lower is better. 0.00%
Max CPU steal Maximum percentage of CPU steal during the test. 0.00%


Number of tasks completed per hour




Date Number of iterations per hour CPU Idle % CPU Steal %
November 20, 2018 18:00 UTC 548 37.19 0.0
November 20, 2018 16:00 UTC 550 41.22 0.0
November 20, 2018 14:00 UTC 556 42.01 0.0
November 20, 2018 12:00 UTC 556 40.98 0.0
November 20, 2018 10:00 UTC 558 41.87 0.0
November 20, 2018 08:00 UTC 547 40.68 0.0
November 20, 2018 06:00 UTC 515 37.17 0.0
November 20, 2018 04:00 UTC 520 36.94 0.0
November 20, 2018 02:00 UTC 524 37.5 0.0
November 20, 2018 00:00 UTC 517 37.52 0.0
November 19, 2018 22:00 UTC 2665 46.32 0.0
November 19, 2018 20:00 UTC 3084 46.47 0.0
November 19, 2018 18:00 UTC 3113 46.41 0.0

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