In our carwash example, the trace might be a file of the intervals between successive car arrivals recorded while watching the system. Tracebased simulation may be used in a variety of applications, from the analysis of solid state disks to the message passing performance on very large computer clusters. A trace driven simulator takes program instructions and address traces and supplies them to microarchitectural simulator. While a tracedriven simulation is known to be comparatively fast and its results are highly reproducible, it also requires a very large storage space. Trace driven simulator separates functionality from timing.
Pdf trace driven simulation of cache memories semantic scholar. One such method, tracedriven memory simulation, has been the subject of intense interest among researchers and has, as a result, enjoyed rapid development and substantial improvements during the past decade. In a tracedriven simulation whenever a value for a random variable is needed by the simulation, it is read from a data file. A tracedriven simulation reads a fixed sequence of trace records from a file as an input. Tracedriven simulation is a third approach with a level of complexity in between the. However, over the last few years, multicore research has moved towards execution driven simulation. Ebooks and ejournals are hosted on igi globals infosci platform and available for pdf andor epub download on. Tracedriven simulation of multithreaded applications yoav etsion. A tracedriven approach for fast and accurate simulation of manycore architectures anastasiia butko, rafael garibotti, luciano ost, chris adeniyijones vianney lapotre, abdoulaye gamatie and gilles sassatelli arm ltd. The performance analysis on various application s and programs shows that the. It is an important tool in many simulation applications in which the models inputs are derived from a sequence of observations made on a real system. Typical uses of address traces include memory hierarchy studies, program pathlength analysis, and page size sensitivity studies.
Collecting a complete and detailed address trace may be hard, especially if it is to represent a complex workload consisting of multiple processes, the operating system, and dy. When it is practical, this input file contains actual historical records. To evaluate this validation statistic, the paper develops a. The network model includes models of the adapter and switch modules. Although conceptually simple, a number of factors make trace driven simulation difficult in practice. When a new request arrives in the simulator, it checks the contents of the cache to see whether the corresponding documents is already in it according to its url. Introduction to simulation rice university, computer science. Sometimes only a portion of the input is trace driven. This thesis evaluates an innovative cache design called, primemapped cache. Pdf this paper focuses on the difference between the average simulated and real responses. Twophase tracedriven simulation computer architecture. No simulation execution driven dynamic binary instr. When a new request arrives in the simulator, it checks the contents of the cache to see whether the corresponding. Smith gives examples of tracedriven memorysystem studies that date as far back as 1966 smith82, and several surveys of trace driven techniques have been written since then holliday91.
Trace driven simulation of cache memories semantic scholar. This paper surveys and analyzes these developments by establishing criteria for evaluating tracedriven methods, and then applies these criteria to describe, categorize and compare over. Trace driven simulation simulator reads a trace of instructions captured during a previous execution both functional and timing simulator can be built trace simulator cs2410. This survey documents these developments by defining various criteria for judging and comparing these different components of tracedriven simulation. Abstractover the past few years, computer architecture research has moved towards executiondriven simulation, due to the inability of traces to capture. Figure 1 shows the simulation type used in the papers from four of the. These trace records usually represent memory references, branch outcomes, or specific machine instructions, among others. We have developed a simulator which models the behavior of a cache manager for a web server. Computer architectural simulation techniques nitish.
They require the user to store the trace files which can grow really large. Simulation types in computer architecture conferences. A case study of tracedriven simulation for analyzing. Considerable effort has been devoted to the development of accurate tracedriven simulation models of todays computer systems. Tracedriven cosimulation of highperformance computing. This article surveys and analyzes these developments by establishing criteria for evaluating tracedriven methods, and then applies these criteria to describe, categorize, and compare. In a trace driven simulation whenever a value for a random variable is needed by the simulation, it is read from a data file. Thus, the gain in term of simulation time using the proposed td approach depends on the number of events collected and. Initial part of a simulation is generally not representative. A tracedriven approach for fast and accurate simulation. Computer architecture university of pittsburgh execution driven simulation simulator runs the program, generating a trace onthefly. However, trace driven simulators are not good in modelling. A tracedriven approach for fast and accurate simulation of. Tracedriven simulation of multithreaded applications.