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- W2087985741 abstract "Software systems often suffer from various kinds of performance inefficiencies resulting from data structure choice, lack of design for performance, and ineffective compiler optimization. Avoiding unnecessary operations, and in particular memory accesses, is desirable. In this paper, we describe DeadSpy --- a tool that dynamically detects every dead write to memory in a given execution and provides actionable feedback to the programmer. This tool provides a methodical way to identify dead writes, which is a common symptom of performance inefficiencies. Our analysis of the SPEC CPU2006 benchmarks showed that the fraction of dead writes is surprisingly high. In fact, we observed that the SPEC CPU2006 gcc benchmark has 61% dead writes on average across its reference inputs. DeadSpy pinpoints source lines contributing to such inefficiencies. In several case studies with high dead writes, simple code restructuring to eliminate dead writes improved their performance significantly. For gcc, avoiding dead writes improved its running time by as much as 28% for some inputs and 14% on average. We recommend dead write elimination as an important step in performance tuning." @default.
- W2087985741 created "2016-06-24" @default.
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- W2087985741 date "2012-03-31" @default.
- W2087985741 modified "2023-10-17" @default.
- W2087985741 title "DeadSpy" @default.
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- W2087985741 doi "https://doi.org/10.1145/2259016.2259033" @default.
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