Seizing the Bandwidth Scaling of On-Package Interconnect in a Post-Moore's Law World
Seizing the Bandwidth Scaling of On-Package Interconnect in a Post-Moore's Law World
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在后摩尔定律世界中抓住封装互连的带宽扩展
DOI:
10.1145/3577193.3593702
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发表时间:
2023
期刊:
影响因子:
--
通讯作者:
Wentzlaff, David
中科院分区:
文献类型:
--
作者:
Chirkov, Grigory;Wentzlaff, David
The slowing and forecasted end of Moore's Law have forced designers to look beyond simply adding transistors, encouraging them to employ other unused resources as a manner to increase chip performance. At the same time, in recent years, inter-die interconnect technologies made a huge leap forward, dramatically increasing the available bandwidth. While the end of Moore's Law will inevitably slow down the performance advances of single-die setups, interconnect technologies will likely continue to scale. We envision a future where designers must create ways to exploit interconnect utilization for better system performance.As an example of a feature that converts interconnect utilization into performance, we present Meduza - a write-update coherence protocol for future chiplet systems. Meduza extends previous write-update protocols to systems with multi-level cache hierarchies. Meduza improves execution speed in our benchmark suite by 19% when compared to the MESIF coherence protocol on a chiplet-based system. Moreover, Meduza promises even more advantages in future systems. This work shows that by exploiting excess interconnect bandwidth, there is significant potential for additional performance in modern and future chiplet systems.
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