Low-energy-consumption method for updating mixed key accidental tasks with dynamic utilization rate

A dynamic update and utilization technology, applied in energy-saving computing, program startup/switching, multi-programming devices, etc., can solve problems such as fatal consequences, inability to use idle time, poor energy-saving effects, etc.

Active Publication Date: 2019-10-08
HUAQIAO UNIVERSITY
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Problems solved by technology

Occasional tasks also make sure they are completed within deadlines, or they can have fatal consequences
The current research on the energy consumption method of s...

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  • Low-energy-consumption method for updating mixed key accidental tasks with dynamic utilization rate
  • Low-energy-consumption method for updating mixed key accidental tasks with dynamic utilization rate
  • Low-energy-consumption method for updating mixed key accidental tasks with dynamic utilization rate

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Embodiment Construction

[0047] The present invention will be further described below through specific embodiments.

[0048] see figure 1 , a kind of dynamic utilization ratio updating hybrid critical sporadic task low energy consumption method provided by the present invention, comprises the following steps:

[0049] Step 101: Scheduling the mixed critical and occasional task set Γ through the virtual deadline policy.

[0050] The mixed key occasional task set Γ is composed of n mixed key occasional tasks, that is, Γ={τ 1 ,τ 2 ,…,τ n}, each mixed key-occasional task τ i (1≤i≤n, i is an integer) consists of four tuple {T i , L i ,C i (LO), C i (HI)}, where T i is the mixed critical occasional task τ i The minimum release time; L i is the mixed critical occasional task τ i The key level, which can be expressed as L i ={LO,HI};C i (LO) and C i (HI) are the mixed key occasional tasks τ i Execution time in low mode and high mode; the so-called low mode means that the execution time of all ...

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Abstract

The invention discloses a low-energy-consumption method for updating a mixed key accidental task with a dynamic utilization rate. The method comprises the following steps of scheduling a mixed key accidental task set gamma through a virtual deadline strategy; calculating the scheduling point of the optimal speed of the low-key-level accidental task and the optimal speed of the high-key-level accidental task at the mixed key accidental task, and dynamically updating the system utilization rate Utot; and according to the system utilization rate Utot, calculating the execution speeds of the low-key-level accidental task and the high-key-level accidental task. According to the present invention, through the dynamic utilization rate updating, the final execution speeds of the low-key-level accidental task and the high-key-level accidental task are calculated, so that the energy consumption of the system is effectively reduced.

Description

technical field [0001] The invention relates to low energy consumption real-time scheduling of a dynamic priority mixed key system, in particular to a low energy consumption method for dynamic utilization updating mixed key occasional tasks. Background technique [0002] A hybrid critical system is an embedded real-time system that integrates multiple functions on one platform to meet actual needs, and has high requirements for energy consumption, cost, and volume. There are critical tasks and non-critical tasks in a mixed critical system, the critical tasks must be completed first, and the non-critical tasks must be completed as much as possible. Hybrid critical systems are widely used in aerospace, industrial manufacturing and other fields, and drones are a typical application of hybrid critical systems. [0003] Sporadic task is a kind of important task in mixed critical system. The release time interval of sporadic task instance is not fixed, but the release time interv...

Claims

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Application Information

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IPC IPC(8): G06F9/48G06F1/329
CPCG06F9/4893G06F1/329G06F2209/486Y02D10/00
Inventor 张忆文
Owner HUAQIAO UNIVERSITY
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