FUSE: Fusing STT-MRAM into GPUs to alleviate off-chip memory access overheads

Jie Zhang, Myoungsoo Jung, Mahmut Kandemir

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this work, we propose FUSE, a novel GPU cache system that integrates spin-transfer torque magnetic random-access memory (STT-MRAM) into the on-chip L1D cache. FUSE can minimize the number of outgoing memory accesses over the interconnection network of GPU's multiprocessors, which in turn can considerably improve the level of massive computing parallelism in GPUs. Specifically, FUSE predicts a read-level of GPU memory accesses by extracting GPU runtime information and places write-once-read-multiple (WORM) data blocks into the STT-MRAM, while accommodating write-multiple data blocks over a small portion of SRAM in the L1D cache. To further reduce the off-chip memory accesses, FUSE also allows WORM data blocks to be allocated anywhere in the STT-MRAM by approximating the associativity with the limited number of tag comparators and I/O peripherals. Our evaluation results show that, in comparison to a traditional GPU cache, our proposed heterogeneous cache reduces the number of outgoing memory references by 32% across the interconnection network, thereby improving the overall performance by 217% and reducing energy cost by 53%.

Original languageEnglish
Title of host publicationProceedings - 25th IEEE International Symposium on High Performance Computer Architecture, HPCA 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages426-439
Number of pages14
ISBN (Electronic)9781728114446
DOIs
Publication statusPublished - 2019 Mar 26
Event25th IEEE International Symposium on High Performance Computer Architecture, HPCA 2019 - Washington, United States
Duration: 2019 Feb 162019 Feb 20

Publication series

NameProceedings - 25th IEEE International Symposium on High Performance Computer Architecture, HPCA 2019

Conference

Conference25th IEEE International Symposium on High Performance Computer Architecture, HPCA 2019
CountryUnited States
CityWashington
Period19/2/1619/2/20

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All Science Journal Classification (ASJC) codes

  • Software
  • Hardware and Architecture
  • Computer Networks and Communications

Cite this

Zhang, J., Jung, M., & Kandemir, M. (2019). FUSE: Fusing STT-MRAM into GPUs to alleviate off-chip memory access overheads. In Proceedings - 25th IEEE International Symposium on High Performance Computer Architecture, HPCA 2019 (pp. 426-439). [8675216] (Proceedings - 25th IEEE International Symposium on High Performance Computer Architecture, HPCA 2019). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/HPCA.2019.00055