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PIPP: Promotion/Insertion Pseudo-Parti-tioning of
Multi-Core Shared CachesYuejian Xie et al. ACM, 2009
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Table of contents Abstract
Background
Reference paper
PIPP
Evaluation
Conclusion
Reference
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Abstract Cache management(e.g., LRU) policies can lead to poor performance
and fairness when the multiple cores compete for the limited LLC ca-pacity
Different memory access patterns can cause cache contention in dif-ferent ways
propose a new cache management approach that combines dynamic insertion and promotion policies
benefits of cache partitioning, adaptive insertion, and capacity stealing all with a single mechanism
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Background MRU, LRU, Promotion policies
Cache Partitioning Cache partitioning reduces worst-case execution time for critical tasks,
thereby enhancing CPU utilization, especially for multicore applications
Page coloring, UCP
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Reference paper Capacity management
M. K. Qureshi and Y. N. Patt. Utility-Based Cache Partitioning: A Low-Overhead, High-Performance, Runtime Mechanism to Partition Shared Caches (UCP)
Dead-Time management M. K. Qureshi, A. Jaleel, Y. N. Patt, S. C. S. Jr., and J. Emer. Adaptive In-
sertion Policies for High-Performance Caching. (DIP)
A. Jaleel, W. Hasenplaugh, M. Qureshi, J. Sebot, S. S. Jr.,and J. Emer. Adaptive Insertion Policies for Managing Shared Caches. (TADIP)
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PIPP Basic PIPP
make use of UCP’s utility monitors to compute the target partitions
Dynamic promotion Dynamic Insertion steal
Stream-Sensitive PIPP
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Evaluation Performance impact of the different cache management techniques
for the weighted IPC speedup (Cooperative Cache Partitioning for Chip Multiprocessors)
PIPP consistently outperforms unmanaged LRU by a large margin (19.0% on the harmonic mean), and also outperforms both UCP and TADIP (10.6% and 10.1%, respectively)
Similar results hold for the quad-core case where PIPP is 21.9% better than LRU, 12.1% better than UCP and 17.5% better than TADIP
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Conclusion In this work, we have introduced a single unified technique that can
provide the benefits of capacity management, adaptive insertion and inter-core capacity stealing
This work opens several future directions for research
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Q & A
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Backup slide
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Evaluation
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Evaluation
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