The high performance delivered by modern computer system keeps scaling with an increasing
number of processors connected using distributed network on-chip. As a result, memory access
latency, largely dominated by remote data cache access and inter-processor communication, is becoming a critical performance bottleneck. To release this problem, it is necessary to localize data access as much as possible while keep efficient on-chip cache memory utilization. Achieving this however, is application dependent and needs a keen insight into the memory access characteristics of the applications. This thesis demonstrates how using fairly simple thus inexpensive compiler analysis memory accesses can be classified into private data access and shared data access. In addition, we introduce a third classification named probably private access and demonstrate the impact of this category compared to traditional private and shared memory classification. The memory access classification information from the compiler analysis is then provided to the runtime system through a modified memory allocator and page table to facilitate a hybrid private-shared caching technique. The hybrid cache mechanism is aware of different data access classification and adopts appropriate placement and search policies accordingly to improve performance. Our analysis demonstrates that many applications have a significant amount of both private and shared data and that compiler analysis can identify the private data effectively for many applications. Experiments
results show that the implemented hybrid caching scheme achieves 4.03% performance improvement over state of the art NUCA-base caching.
| Identifer | oai:union.ndltd.org:PITT/oai:PITTETD:etd-11162010-142107 |
| Date | 26 January 2011 |
| Creators | Li, Yong |
| Contributors | Youtao Zhang, Rami Melhem, Alex K. Jones, Sangyeun Paul Cho |
| Publisher | University of Pittsburgh |
| Source Sets | University of Pittsburgh |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.library.pitt.edu/ETD/available/etd-11162010-142107/ |
| Rights | unrestricted, I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to University of Pittsburgh or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report. |
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