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POPL
2006
ACM
14 years 7 months ago
A hierarchical model of data locality
In POPL 2002, Petrank and Rawitz showed a universal result-finding optimal data placement is not only NP-hard but also impossible to approximate within a constant factor if P = NP...
Chengliang Zhang, Chen Ding, Mitsunori Ogihara, Yu...
GLVLSI
2007
IEEE
141views VLSI» more  GLVLSI 2007»
14 years 1 months ago
Transition-activity aware design of reduction-stages for parallel multipliers
We propose an interconnect reorganization algorithm for reduction stages in parallel multipliers. It aims at minimizing power consumption for given static probabilities at the pri...
Saeeid Tahmasbi Oskuii, Per Gunnar Kjeldsberg, Osc...
SIGIR
2002
ACM
13 years 7 months ago
Two-stage language models for information retrieval
The optimal settings of retrieval parameters often depend on both the document collection and the query, and are usually found through empirical tuning. In this paper, we propose ...
ChengXiang Zhai, John D. Lafferty
VLDB
2002
ACM
108views Database» more  VLDB 2002»
13 years 7 months ago
Generic Database Cost Models for Hierarchical Memory Systems
Accurate prediction of operator execution time is a prerequisite for database query optimization. Although extensively studied for conventional disk-based DBMSs, cost modeling in ...
Stefan Manegold, Peter A. Boncz, Martin L. Kersten
PLDI
2010
ACM
13 years 11 months ago
Detecting Inefficiently-Used Containers to Avoid Bloat
Runtime bloat degrades significantly the performance and scalability of software systems. An important source of bloat is the inefficient use of containers. It is expensive to cre...
Guoqing Xu, Atanas Rountev