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- W1986202204 abstract "Due to their large code footprint, OLTP workloads suffer from significant I-cache miss rates on contemporary microprocessors. This paper analyzes the I-stream behavior of an OLTP workload, called the Oracle Database Benchmark (ODB), on Chip-Multiprocessors (CMP). Our results show that, although, the overall code footprint of ODB is large, multiple ODB threads running concurrently on multiple processors tend to access common code segments frequently, thus exhibiting significant constructive sharing. In fact, in a CMP system, an I-cache shared between multiple processors incurs similar miss rate as a dedicated I-cache per processor where the per processor I-cache has the same capacity as the shared I-cache. Based on these observations, this paper makes the case for a shared I-cache organization in a CMP, instead of the traditional approach of using a dedicated I-cache per processor.Furthermore, this paper shows that OLTP code stream exhibits good spatial locality. Adding a simple dedicated Line Buffer per processor can exploit this spatial locality effectively, to reduce latency and bandwidth requirements on the shared cache. The proposed shared I-cache organization results in an improvement of at least 5X in miss rate over a dedicated cache organization, for the same total capacity." @default.
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- W1986202204 date "2003-09-27" @default.
- W1986202204 modified "2023-10-18" @default.
- W1986202204 title "A case for shared instruction cache on chip multiprocessors running OLTP" @default.
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- W1986202204 doi "https://doi.org/10.1145/1024295.1024297" @default.
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