Measuring and Visualizing Energy Consumption within

Software Code

Tiago Carção

University of Minho, Braga, Portugal

Supervisors:João SaraivaJácome Cunha

Graduate Consortium - VL/HCC 2014

Do the developers concern themselves with energy consumption during the development process?

How can we display that information to the developers?

What type of information should be presented to the developers?

Why Energy?

1

Why software?

2

IsolationResponsibilityIdentification and improvement

Quantification

What type of information do developers have?

3

Spectrum-based Fault Localization

4

Com

pon

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ts

Testst1 t2 t3 t4 t5

1

1

1

1

1

1

1

1

1

1

0

0

1

1 1 1

1 1 1

1 1 1

1 0 1

1 0 1

1 1 1

0 1 0 1

Spectrum-based Fault Localization

4

Does the test output matches the expected output?

Testst1 t2 t3 t4 t5

1

1

1

1

1

1

1

1

0

0

1 1

1 1 1

1 1 1

1 1 1

1 0 1

1 0 1

1 1 1

0.3

1 0 1 0 1

Spectrum-based Fault LocalizationC

om

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4

Testst1 t2 t3 t4 t5

1

1

1

1

1

1

1

1

0

0

1 1

1 1 1

1 1 1

1 1 1

1 0 1

1 0 1

1 1 1

0.7

0.3

0.3

0.3

1 0 1 0 1

Spectrum-based Fault LocalizationC

om

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Testst1 t2 t3 t4 t5

1

1

1

1

1

1

1

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0

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1 1

1 1 1

1 1 1

1 1 1

1 0 1

1 0 1

1 1 1

0.3

0.7

0.3

0.3

0.3

0.7

1 0 1 0 1

Enquire possible faults!

Spectrum-based Fault LocalizationC

om

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4

How to adapt the SFL model for Energy Leak detection?

What data to collect from the code execution?

Decide what is a energy leak?

5

int first = 0, second = 1, next, c; for ( c = 0 ; c < number; c++ ) { if ( c <= 1 ) next = number; else { next = first + second; first = second; second = next; } }

int fibonacciCalc(int number) {

return next; }

Source code instrumentation

6

#GET TIME & START MEASURING

int first = 0, second = 1, next, c; for ( c = 0 ; c < number; c++ ) { if ( c <= 1 ) next = number; else { next = first + second; first = second; second = next; } }

int fibonacciCalc(int number) {

return next; }

#GET TIME & END MEASURING

Source code instrumentation

6

Metrics collected

7

SFL AdaptedC

om

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Testst1 t2 t3 t4 t5

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Testst1 t2 t3 t4 t5

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1

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1

1

1

0

0

1 1

1 1 1

1 1 1

1 1 1

1 0 1

1 0 1

1 1 1

0.8 0.3 0.9 0.3 0.7

SFL AdaptedC

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Testst1 t2 t3 t4 t5

1

1

1

1

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1

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1

0

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1 1

1 1 1

1 1 1

1 1 1

1 0 1

1 0 1

1 1 1

0.1

0.2

0.11

0.23

0.8

0.46

0.8 0.3 0.9 0.3 0.7

SFL AdaptedC

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8

How to represent the information?

9

What we envision

10

Do the developers concern themselves with energy consumption during the development process?

How can we display that information to the developers?

What type of information should be presented to the developers?

Measuring and Visualizing Energy Consumption within

Software Code

Tiago Carção

University of Minho, Braga, Portugal

Supervisors:João SaraivaJácome Cunha

Graduate Consortium - VL/HCC 2014