DocumentCode :
3074636
Title :
Memory access pattern-aware DRAM performance model for multi-core systems
Author :
Choi, Hyojin ; Lee, Jongbok ; Sung, Wonyong
Author_Institution :
Sch. of Electr. Eng., Seoul Nat. Univ., Seoul, South Korea
fYear :
2011
fDate :
10-12 April 2011
Firstpage :
66
Lastpage :
75
Abstract :
The DRAM latency modeling is complex because most chips contain row-buffers and multiple banks to exploit patterns of DRAM accesses. As a result, the latency of DRAM access not only depends on the circuit timing parameters but also memory access patterns. This study derives an analytical model that predicts the DRAM access performance using DRAM timing and memory access pattern parameters. As a performance metric, the bank busy time of DRAM is used. The pattern parameters employed represent memory access characteristics such as the number of row-buffer misses, the number of read or write requests that hit the row-buffers, etc. The proposed model not only relates the DRAM access performance with the memory access pattern but also provides information for timing optimization of next generation DRAMs. The model is evaluated with SPLASH-2 benchmark by using cycle-accurate timing simulations with DDR3 timings. The evaluation results show that, in memory-bounded cases, the execution time is limited by bank utilization, not by the data bus occupation ratio.
Keywords :
DRAM chips; memory architecture; multiprocessing systems; optimisation; DDR3 timings; DRAM latency modeling; SPLASH-2; circuit timing parameters; cycle-accurate timing simulations; data bus occupation ratio; memory access pattern-aware DRAM performance; multicore systems; row-buffers; timing optimization; Analytical models; Computer architecture; Delay; Delay effects; Microprocessors; Random access memory;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Performance Analysis of Systems and Software (ISPASS), 2011 IEEE International Symposium on
Conference_Location :
Austin, TX
Print_ISBN :
978-1-61284-367-4
Electronic_ISBN :
978-1-61284-368-1
Type :
conf
DOI :
10.1109/ISPASS.2011.5762716
Filename :
5762716
Link To Document :
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