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GUI overhead

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Heather Brotherton
Heather Brotherton

SIGUCCS 2013 ACM presentation. Energy overhead of the graphical user interface in server operating systems. Heather Brotherton, J. Eric Dietz, John McGrory, and Fredrick Mtenzi. 2013. In Proceedings of the 2013 ACM annual conference on Special interest group on university and college computing services (SIGUCCS '13). ACM, New York, NY, USA, 65-68. DOI=10.1145/2504776.2504781 http://doi.acm.org/10.1145/2504776.2504781

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Energy Overhead of the GUI in Server Operating Systems Heather Brotherton
Introduction This study will Make a case for reducing use of the graphical user interface Avoid focus on a particular brand of operating system
OPERATING SYSTEM Nearly every server, controlling systems resources Allows us to take advantage of the Cascade Effect
Cascade Effect
Potential Savings Source: EXP Critical Facilities Inc., Intel Corp.
Example If a PCI card such as video card were removed for a savings of 41watts from 500 servers in a data center, the cumulative watts saved would be 58,220 watts per year. At an average of ten cents per kilowatt-hour this results in a savings of$51,035.65 per year.
Experiment Energy readings were collected for a minimum of one hour using the Watts Up? Meter.
Monitoring Tool Watts up? Pro universal outlet version. This meter is capable of measuring 100 to 250v within a plus or minus 1.5 percent accuracy. The meter is also capable of logging at onesecond intervals and provides a USB interface and PC software
Linux Observations Linux based server operating systems ran the top command during the observations. top -d 1 > /home/testOSName.txt
Windows Observations Windows ran the Typeperf command line tool during the observations configured to provide much of the same information as provided by top. typeperf MemoryAvailable bytes processor(*)% processortime Process(*)Thread Count > testOSName.csv
Hardware Intel Atom D525 1.8GHz dual core processor Integrated Intel Graphics Media Accelerator 3150 Gigabit LAN SD card reader 5 USB connections Fan-less external power supply Intel Solid State Drive 80GB 320 Series PNY 4GB PC3-10666 1.3GHz DDR3 SoDIMM
Server Baseline watt consumption mean energy consumed is 7.96 watts and the median is 8.70 watts. After the addition of 4GB RAM to the server during a one hour period is 15.36 watts and the median is 15 watts. After Solid State Drive (SSD) installation was a mean of 17.42 watts and a median consumption of 17.7 watts. Baseline for the server of 17.42 to17.7 watts
Server Operating Systems The software used for the testing were the following x86 operating systems: Ubuntu 11.10 (Linux) Windows Server 2008 R2 Datacenter GUI Windows Server 2008 R2 Datacenter Core
Consumption by OS
GUI vs Non GUI Time Threads Watts Time Threads Watts (Minutes) (Mean) (Mean) (Minutes) (Mean) (Mean) 9:42 373 18.65 3:16 263 17.1 9:43 361 18.6 3:17 263 17 9:44 362 18.65 3:18 260 17 9:45 360 18.65 3:19 256 17.05 9:46 360 18.7 3:20 259 17.05 9:47 368 18.7 3:21 255 17.15 9:48 364 18.6 3:22 255 17.25 9:49 363 18.7 3:23 252 17.1 9:50 362 18.65 3:24 250 17.2 9:51 364 18.7 3:25 254 17.2 9:52 376 18.65 3:26 250 17.25
Table explained The mean number of threads: GUI 365 Non-GUI 256 Difference approximately 109 threads Indicates that a reduction of the ~100-thread GUI overhead can save roughly one watt at the server level.
FINDINGS Operating systems that do not run a graphical user interface (GUI) tested use roughly 17.5 to 17.6 watts. Graphical user interface (GUI) based operating systems tested consumed 18.1 to 18.9 watts roughly. Not using a GUI would save .6 to 1.3 watts per server.
Conclusion Savings of roughly 1 watt per server Doesnt seem like a big deal? Maybe, but now you dont need that video card
Math (1watt GUI + 41 watt video card) 2.84 Cascade Effect = 119.28 watts Hours in a year 8765.81 wattage x hours used 歎 1000 x price per kWh = cost of electricity (119.28 x 8765.81 歎 1000) x .1 = 104.55858168 For 500 servers $52,279.29

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GUI overhead

  • 1. Energy Overhead of the GUI in Server Operating Systems Heather Brotherton
  • 2. Introduction This study will Make a case for reducing use of the graphical user interface Avoid focus on a particular brand of operating system
  • 3. OPERATING SYSTEM Nearly every server, controlling systems resources Allows us to take advantage of the Cascade Effect
  • 5. Potential Savings Source: EXP Critical Facilities Inc., Intel Corp.
  • 6. Example If a PCI card such as video card were removed for a savings of 41watts from 500 servers in a data center, the cumulative watts saved would be 58,220 watts per year. At an average of ten cents per kilowatt-hour this results in a savings of$51,035.65 per year.
  • 7. Experiment Energy readings were collected for a minimum of one hour using the Watts Up? Meter.
  • 8. Monitoring Tool Watts up? Pro universal outlet version. This meter is capable of measuring 100 to 250v within a plus or minus 1.5 percent accuracy. The meter is also capable of logging at onesecond intervals and provides a USB interface and PC software
  • 9. Linux Observations Linux based server operating systems ran the top command during the observations. top -d 1 > /home/testOSName.txt
  • 10. Windows Observations Windows ran the Typeperf command line tool during the observations configured to provide much of the same information as provided by top. typeperf MemoryAvailable bytes processor(*)% processortime Process(*)Thread Count > testOSName.csv
  • 11. Hardware Intel Atom D525 1.8GHz dual core processor Integrated Intel Graphics Media Accelerator 3150 Gigabit LAN SD card reader 5 USB connections Fan-less external power supply Intel Solid State Drive 80GB 320 Series PNY 4GB PC3-10666 1.3GHz DDR3 SoDIMM
  • 12. Server Baseline watt consumption mean energy consumed is 7.96 watts and the median is 8.70 watts. After the addition of 4GB RAM to the server during a one hour period is 15.36 watts and the median is 15 watts. After Solid State Drive (SSD) installation was a mean of 17.42 watts and a median consumption of 17.7 watts. Baseline for the server of 17.42 to17.7 watts
  • 13. Server Operating Systems The software used for the testing were the following x86 operating systems: Ubuntu 11.10 (Linux) Windows Server 2008 R2 Datacenter GUI Windows Server 2008 R2 Datacenter Core
  • 15. GUI vs Non GUI Time Threads Watts Time Threads Watts (Minutes) (Mean) (Mean) (Minutes) (Mean) (Mean) 9:42 373 18.65 3:16 263 17.1 9:43 361 18.6 3:17 263 17 9:44 362 18.65 3:18 260 17 9:45 360 18.65 3:19 256 17.05 9:46 360 18.7 3:20 259 17.05 9:47 368 18.7 3:21 255 17.15 9:48 364 18.6 3:22 255 17.25 9:49 363 18.7 3:23 252 17.1 9:50 362 18.65 3:24 250 17.2 9:51 364 18.7 3:25 254 17.2 9:52 376 18.65 3:26 250 17.25
  • 16. Table explained The mean number of threads: GUI 365 Non-GUI 256 Difference approximately 109 threads Indicates that a reduction of the ~100-thread GUI overhead can save roughly one watt at the server level.
  • 17. FINDINGS Operating systems that do not run a graphical user interface (GUI) tested use roughly 17.5 to 17.6 watts. Graphical user interface (GUI) based operating systems tested consumed 18.1 to 18.9 watts roughly. Not using a GUI would save .6 to 1.3 watts per server.
  • 18. Conclusion Savings of roughly 1 watt per server Doesnt seem like a big deal? Maybe, but now you dont need that video card
  • 19. Math (1watt GUI + 41 watt video card) 2.84 Cascade Effect = 119.28 watts Hours in a year 8765.81 wattage x hours used 歎 1000 x price per kWh = cost of electricity (119.28 x 8765.81 歎 1000) x .1 = 104.55858168 For 500 servers $52,279.29