期刊
ULTRAMICROSCOPY
卷 115, 期 -, 页码 109-114出版社
ELSEVIER
DOI: 10.1016/j.ultramic.2012.02.003
关键词
CPU; GPU; Hybrid computing; CPU-GPU co-processing; High performance computing; Electron tomography; Tomographic reconstruction
类别
资金
- Spanish Ministry of Science [TIN2008-01117]
- European Reg. Dev. Fund (ERDF)
- [P10-TIC-6002]
- [P11-TIC-7176]
Modern computers are equipped with powerful computing engines like multicore processors and GPUs. The 3DEM community has rapidly adapted to this scenario and many software packages now make use of high performance computing techniques to exploit these devices. However, the implementations thus far are purely focused on either GPUs or CPUs. This work presents a hybrid approach that collaboratively combines the GPUs and CPUs available in a computer and applies it to the problem of tomographic reconstruction. Proper orchestration of workload in such a heterogeneous system is an issue. Here we use an on-demand strategy whereby the computing devices request a new piece of work to do when idle. Our hybrid approach thus takes advantage of the whole computing power available in modern computers and further reduces the processing time. This CPU+GPU co-processing can be readily extended to other image processing tasks in 3DEM. (C) 2012 Elsevier B.V. All rights reserved.
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