Ashish Gupta

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• Ashish Gupta
• Project with Bin Lin

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Overview

• Our Goal
• Introduce resource borrowing and its motivation
• Current model and further possibilites
• What we want to study ?
• Methodology
• Actually try it out !
• Design of a system which emulates resource
  borrowing and captures feedback
• Design of our application
• What it does ?
• Issues
• Depends on
• Context
• Person
• Hardware
• Others
• Frog in the pot ?
• Conclusions and Results

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Overview

• The problem and our approach
• Applications
• Some Issues and Results

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Our Goal
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The Problem

• Performance Slowdown

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Effect of performance slowdown
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Effect of performance slowdown
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Effect of performance slowdown
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How can we find this out ?

• Actually test it !

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How can we find this out ?

• Measure existing load

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How can we find this out ?

• Emulate Resource Borrowing

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CPU Usage vs. Time
Borrowed Load
Final Load
Real load
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How can we find this out ?

• Allow User Feedback

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How can we find this out ?

• Find MAX Level

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CPU Usage vs. Time
Final Load
Borrowed Load
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How is it useful ?
Comfort f ()
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How is it useful ?
Workstation Sharing
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How is it useful ?

• Interactivity Aware Scheduling

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Some questions and issues

• Finding a mean level which irritates 90 of the
  users ?

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Some questions and issues

• Finding a mean level which irritates 90 of the
  users ?

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Context
Person
Hardware
Others ?
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Context
Person
Hardware
Others ?
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Context
Person
Hardware
Others ?
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Context
Person
Hardware
Others ?
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Frog in the Pot Hypothesis


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• Preliminary Results

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Dependence On Context
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Frog in the Pot
0.98
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Person Effects
Power Users
Typical Users
Beginners
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Conclusion
Comfort f ()
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Questions and Answers

• Other types of irritation
• Bursty natures of Desktop Computing, bursts
  indicate sudden action-response tasks
• Large number of factors for irritation

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Context
Person
Hardware
Others ?
Load
Time
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Understanding Testcases
CPU
ramp 1 ramp 2 ramp 3 step 1 step 2 ..
Ramp
Step
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Server
Results Transfer
Testcase Transfer
Client
Resource borrowing using testcase profile
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An irritating Interface
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Bursty Nature of Interactive Computation
Interactive Computation
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Understanding Testcases
CPU
MEM
ramp 1 ramp 2 ramp 3 step 1 step 2 ..
ramp 1 ramp 2 ramp 3 step 1 step 2 ..
Ramp
Step
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Combination of Resources

• CPU Usage
• Memory Usage
• Hard Disk activity
• Network Traffic

Comfort Zone surface
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Combination of Resources

• CPU Usage
• Memory Usage
• Hard Disk activity
• Network Traffic

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• Feedback key photo
• Explain the background running process and
  feedback
• Put real scatter graph