.   +---------------------+      
+---|---------------------|-------.    .---_||||||_-----------------.   
|:--|-----\\\\\//////-----|--. o   ----                          (\)| 
|#|||------         ------|--.||      [  Peter A. H. Peterson       | 
|-::|-----|.-,   ,-.|-----|===========[  Assistant Professor of CS  |  
|o+o|----(| @ |   @ |)----|:::::::::::[  329 Heller Hall            | 
||o||-----#  '-'    #-----|:::::::::::[  1114 Kirby Drive           | 
|||||------\"==="  /------|===========[  Duluth, MN 55812           | 
|||||-------`-----'|------| | o       [  pahp@d.umn.edu             | 
||/ |.----/'\'-----'/\---.|-+-'       [  pedro@tastytronic.net_  (/)|   
||^_|     '''|     |''    |-----'''----||||-||||||||||-||||||||||.  |  
||| +---------------------+-----------'                          | :| 
|:|                                                              |:.|
| '------------.  [back to research]                             |.:|
| home         |                                                 |:.| 
'------------. |  DEEP                                           |.:|
.------------' |                                                 |:.|      
| cv           |  [project wiki]                                 |.:|      
| .------------'  [white paper]                                  |:.|      
| '------------.  [using the DEEP for education]                 |.:|      
| research     |                                                 |:.|      
'------------. |  The DEEP (Decision support for Energy          |.:|      
.------------' |  Efficient Processing) system is a power        |:.|      
| interests    |  measurement platform based on commodity        |.:|      
| .------------'  hardware and low-impact instrumentation        |:.|      
| '------------.  developed by Digvijay Singh and Dr. William    |.:|      
| blog         |  Kaiser in the EE department at UCLA. I've      |:.|      
'------------. |  been responsible for a large amount of tool    |.:|      
.------------' |  and testbed development, with a particular     |:.|      
| reading      |  focus on supporting experiments at both the    |.:|      
| .------------'  user and kernel levels.                        |:.|      
| '------------.                                                 |.:|      
| quotes       |  The DEEP capable of simultaneously measuring   |:.|      
'------------. |  power consumption for multiple components at   |.:|      
.------------' |  the microsecond granularity. The standard      |:.|      
| contact      |  DEEP setup provides measurement for CPU, RAM,  |.:|      
|              |  disk, bridge, and USB, and extensions are in   |:.|      
|''''''''''''''|  the works for also measuring complete system   |.:|      
| 001010101101 |  power. Furthermore, the samples taken are      |:.|      
| 011011011001 |  synchronized to the clock on the test system,  |.:|      
| 010011011011 |  which allows researchers to identify the       |:.|      
| 110011010111 |  power consumed by relatively short segments    |.:|      
| 100100001100 |  of code.                                       |:.|      
| 101001100111 |                                                 |.:|      
| 001101100101 |  Our lab began collaborating with Dr. Kaiser's  |:.|      
| 001111000000 |  group to use the DEEP for investigating        |.:|      
| 001010101101 |  trade-offs between security and power.         |:.|      
| 011011011001 |  However, we quickly expanded our               |.:|      
| 010011011011 |  collaboration to include general research      |:.|      
| 110011010111 |  questions involving the DEEP. We have made     |.:|      
| 100100001100 |  some interesting and counter-intuitive         |:.|      
| 101001100111 |  discoveries about how component level power    |.:|      
| 001101100101 |  fluctuates under real-world workload, and we   |:.|      
| 001111000000 |  continue to investigate the dynamic run-time   |.:|      
| 001010101101 |  properties of computer hardware in real        |:.|      
| 011011011001 |  systems.                                       |.:|      
| 010011011011 |                                                 |:.|      
| 110011010111 |  Looking forward, we plan to use the DEEP and   |.:|      
| 100100001100 |  lessons gained by its application, to attack   |:.|      
| 101001100111 |  larger issues in power management and          |.:|      
| 001101100101 |  efficiency.                                    |:.|      
| 001111000000 |                                                 |.:|      
| 001010101101 |  [back to research]                             |:.|      
| 011011011001 |                                                 |.:|      
|'''''''''''''''-------------------------------------------------'::'. 
|::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::| 
`=======---------.______.-------:::::::-:------------------------. ? | 
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