Adaptive energy-management features of the IBM POWER 7 chip

  • Authors:
  • Michael Floyd;Malcolm Ware;Karthick Rajamani;Tilman Gloekler;Bishop Brock;Pradip Bose;Alper Buyuktosunoglu;Juan C. Rubio;Birgit Schubert;Bruno Spruth;Jose A. Tierno;Lorena Pesantez

  • Affiliations:
  • IBM Systems and Technology Group, Austin, TX;IBM Research Division, Austin Research Laboratory, Austin, TX;IBM Research Division, Austin Research Laboratory, Austin, TX;IBM Research Division, Boeblingen, Germany;IBM Systems and Technology Group, Austin, TX;IBM Research Division, Thomas J. Watson Research Center, Yorktown Heights, NY;IBM Research Division, Thomas J. Watson Research Center, Yorktown Heights, NY;IBM Research Division, Austin Research Laboratory, Austin, TX;IBM Systems and Technology Group, Boeblingen, Germany;IBM Systems and Technology Group, Boeblingen, Germany;IBM Research Division, Thomas J. Watson Research Center, Yorktown Heights, NY;IBM Systems and Technology Group, Austin, TX

  • Venue:
  • IBM Journal of Research and Development
  • Year:
  • 2011

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Abstract

The IBM POWER7® processor implements several new adaptive power-management techniques that, in concert with the EnergyScalei firmware, allow it to proactively take advantage of variations in workload, environmental conditions, and overall system utilization to meet customer-directed power and performance goals. These features build on the support and the capabilities provided by its predecessor, i.e., the IBM POWER6™ processor. Among these are per-core frequency scaling with available autonomous frequency controls, per-chip automated voltage slewing, power-consumption estimation, soft power capping, and hardware instrumentation assist.