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ICCD
2004
IEEE

Evaluating Techniques for Exploiting Instruction Slack

14 years 7 months ago
Evaluating Techniques for Exploiting Instruction Slack
In many workloads, 25% to 50% of instructions have slack allowing them to be delayed without impacting performance. To exploit this slack, processors may implement more power-efficient, longer latency pipelines or provide dynamically scaled pipelines using multiple clock domains. Issuing instructions with slack to slower pipelines can result in substantial power savings, with minimal performance loss. Considering both dynamic and static power dissipation, we found that by using longer latency pipelines the power of functional unit pipelines decreases by 20% to 55% with a performance impact of 0% to 3% for SPEC2000 and MediaBench workloads. Dynamic scaling reduces the performance loss in intense multimedia workloads by up to 2%, but achieves lower power savings.
Yau Chin, John Sheu, David Brooks
Added 16 Mar 2010
Updated 16 Mar 2010
Type Conference
Year 2004
Where ICCD
Authors Yau Chin, John Sheu, David Brooks
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