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Sampled Simulation ...
Sampled Simulation of Task-Based Programs
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- Grass, Thomas (författare)
- Barcelona Supercomp Ctr, Barcelona 08034, Spain;Rhein Westfal TH Aachen, D-52062 Aachen, Germany
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- Carlson, Trevor E. (författare)
- NUS, Singapore 119077, Singapore
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- Rico, Alejandro (författare)
- Arm Ltd, Austin, TX 78735 USA
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- Ceballos, Germán, 1989- (författare)
- Uppsala universitet,Datorteknik,Datorarkitektur och datorkommunikation
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- Ayguade, Eduard (författare)
- Barcelona Supercomp Ctr, Barcelona 08034, Spain;Univ Politecn Cataluna, ES-08034 Barcelona, Spain
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- Casas, Marc (författare)
- Barcelona Supercomp Ctr, Barcelona 08034, Spain
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- Moreto, Miquel (författare)
- Barcelona Supercomp Ctr, Barcelona 08034, Spain;Univ Politecn Cataluna, ES-08034 Barcelona, Spain
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(creator_code:org_t)
- IEEE COMPUTER SOC, 2019
- 2019
- Engelska.
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Ingår i: IEEE Transactions on Computers. - : IEEE COMPUTER SOC. - 0018-9340 .- 1557-9956. ; 68:2, s. 255-269
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Sampled simulation is a mature technique for reducing simulation time of single-threaded programs. Nevertheless, current sampling techniques do not take advantage of other execution models, like task-based execution, to provide both more accurate and faster simulation. Recent multi-threaded sampling techniques assume that the workload assigned to each thread does not change across multiple executions of a program. This assumption does not hold for dynamically scheduled task-based programming models. Task-based programming models allow the programmer to specify program segments as tasks which are instantiated many times and scheduled dynamically to available threads. Due to variation in scheduling decisions, two consecutive executions on the same machine typically result in different instruction streams processed by each thread. In this paper, we propose TaskPoint, a sampled simulation technique for dynamically scheduled task-based programs. We leverage task instances as sampling units and simulate only a fraction of all task instances in detail. Between detailed simulation intervals, we employ a novel fast-forwarding mechanism for dynamically scheduled programs. We evaluate different automatic techniques for clustering task instances and show that DBSCAN clustering combined with analytical performance modeling provides the best trade-off of simulation speed and accuracy. TaskPoint is the first technique combining sampled simulation and analytical modeling and provides a new way to trade off simulation speed and accuracy. Compared to detailed simulation, TaskPoint accelerates architectural simulation with 8 simulated threads by an average factor of 220x at an average error of 0.5 percent and a maximum error of 7.9 percent.
Ämnesord
- NATURVETENSKAP -- Data- och informationsvetenskap -- Datavetenskap (hsv//swe)
- NATURAL SCIENCES -- Computer and Information Sciences -- Computer Sciences (hsv//eng)
Nyckelord
- Sampled simulation
- task-based
- analytical performance modeling
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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