Ashish Gupta Project with Bin Lin

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

Overview The problem and our approach Applications Some Issues and Results

Our Goal Unused Resources

The Problem Performance Slowdown

Effect of performance slowdown

How can we find this out ? Actually test it !

How can we find this out ? 1 Measure existing load

How can we find this out ? Emulate Resource Borrowing Real load Borrowed Load Final Load 2 % CPU Usage vs. Time

How can we find this out ? Allow User Feedback 3

How can we find this out ? Find MAX Level Borrowed Load Final Load 4 MAX % CPU Usage vs. Time

How is it useful ? Comfort = f (…)

How is it useful ? Workstation Sharing

How is it useful ? Interactivity Aware Scheduling Interactive

Some questions and issues Finding a mean level which irritates 90% of the users ?

Some questions and issues Finding a mean level which irritates 90% of the users ?

ContextPersonHardware Others ?

ContextPersonHardware Others ?

ContextPersonHardware Others ?

ContextPersonHardware Others ?

Frog in the Pot Hypothesis % Resource Load vs. Time

Preliminary Results

Dependence On Context

Frog in the Pot % Resource Load vs. Time 0.98

Person Effects Power UsersTypical UsersBeginners

Conclusion Comfort = f (…) Work on applications Study of factors

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

ContextPersonHardware Others ? Time Load

Understanding Testcases CPU ramp 1 ramp 2 ramp 3 step 1 step 2 ….. Ramp Step

Testcase Transfer Results Transfer Server Client Resource borrowing using testcase profile

An irritating Interface

Interactive Computation Bursty Nature of Interactive Computation

Understanding Testcases CPU ramp 1 ramp 2 ramp 3 step 1 step 2 ….. MEM ramp 1 ramp 2 ramp 3 step 1 step 2 ….. Ramp Step

Combination of Resources CPU Usage Memory Usage Hard Disk activity Network Traffic Comfort Zone surface

Combination of Resources CPU Usage Memory Usage Hard Disk activity Network Traffic

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