PEGASUS presented in ISCA

David Lo's paper on PEGASUS was presented in this year's ISCA. PEGASUS demonstrates that combining end-to-end latency monitoring with a fine-grained power management mechanism is key to tackling the energy proportionality problem for large-scale latency-critical workloads. PEGASUS was evaluated on production Google web search in a production Google search cluster and demonstrated that it can save up to 30% power without impacting latency guarantees.