Yakun Sophia Shao is a Ph.D. candidate in Computer Science at Harvard University, working with Professor David Brooks. Her primary research interests lie in the general area of computer architecture, with a particular focus on modeling and design for heterogeneous architectures. She received her B.S. degree in Electrical Engineering from Zhejiang University, China and her S.M. degree in Computer Science from Harvard University. Her paper was selected as one of the Top Picks in Computer Architecture in 2014. She is a Siebel Scholar and a recipient of the IBM Ph.D. Fellowship.David Brooks is the Haley Family Professor of Computer Science in the School of Engineering and Applied Sciences at Harvard University. He joined Harvard in 2002 after spending one year as a research staff member at IBM T.J. Watson Research Center. Professor Brooks received his B.S. in Electrical Engineering at the University of Southern California and M.A. and Ph.D. degrees in Electrical Engineering at Princeton University. Professor Brooks has received several honors and awards including the ACM Maurice Wilkes Award, NSF CAREER award, IBM Faculty Partnership Award, and DARPA Young Faculty Award. He has received best paper awards at MICRO, HPCA, and ICCD and has had several papers selected for IEEE Micro’s “Top Picks in Computer Architecture� since 2005. His research interests include technology-aware computer design, with an emphasis on power-efficient computer architectures for high-performance and embedded systems.

• Preface.- Acknowledgments.- Why Accelerators, Now?.- A Taxonomy of Accelerators..- Accelerator Design Flow 101..- Accelerator Modeling.- Workload Characterization for Accelerators.- Accelerator Benchmarks.- Future Directions.- Bibliography.- Authors' Biographies .

Yakun Sophia Shao is a Ph.D. candidate in Computer Science at Harvard University, working with Professor David Brooks. Her primary research interests lie in the general area of computer architecture, with a particular focus on modeling and design for heterogeneous architectures. She received her B.S. degree in Electrical Engineering from Zhejiang University, China and her S.M. degree in Computer Science from Harvard University. Her paper was selected as one of the Top Picks in Computer Architecture in 2014. She is a Siebel Scholar and a recipient of the IBM Ph.D. Fellowship.David Brooks is the Haley Family Professor of Computer Science in the School of Engineering and Applied Sciences at Harvard University. He joined Harvard in 2002 after spending one year as a research staff member at IBM T.J. Watson Research Center. Professor Brooks received his B.S. in Electrical Engineering at the University of Southern California and M.A. and Ph.D. degrees in Electrical Engineering at Princeton University. Professor Brooks has received several honors and awards including the ACM Maurice Wilkes Award, NSF CAREER award, IBM Faculty Partnership Award, and DARPA Young Faculty Award. He has received best paper awards at MICRO, HPCA, and ICCD and has had several papers selected for IEEE Micro’s “Top Picks in Computer Architecture� since 2005. His research interests include technology-aware computer design, with an emphasis on power-efficient computer architectures for high-performance and embedded systems.

• Preface.- Acknowledgments.- Why Accelerators, Now?.- A Taxonomy of Accelerators..- Accelerator Design Flow 101..- Accelerator Modeling.- Workload Characterization for Accelerators.- Accelerator Benchmarks.- Future Directions.- Bibliography.- Authors' Biographies .

Yakun Sophia Shao is a Ph.D. candidate in Computer Science at Harvard University, working with Professor David Brooks. Her primary research interests lie in the general area of computer architecture, with a particular focus on modeling and design for heterogeneous architectures. She received her B.S. degree in Electrical Engineering from Zhejiang University, China and her S.M. degree in Computer Science from Harvard University. Her paper was selected as one of the Top Picks in Computer Architecture in 2014. She is a Siebel Scholar and a recipient of the IBM Ph.D. Fellowship.David Brooks is the Haley Family Professor of Computer Science in the School of Engineering and Applied Sciences at Harvard University. He joined Harvard in 2002 after spending one year as a research staff member at IBM T.J. Watson Research Center. Professor Brooks received his B.S. in Electrical Engineering at the University of Southern California and M.A. and Ph.D. degrees in Electrical Engineering at Princeton University. Professor Brooks has received several honors and awards including the ACM Maurice Wilkes Award, NSF CAREER award, IBM Faculty Partnership Award, and DARPA Young Faculty Award. He has received best paper awards at MICRO, HPCA, and ICCD and has had several papers selected for IEEE Micro’s “Top Picks in Computer Architecture� since 2005. His research interests include technology-aware computer design, with an emphasis on power-efficient computer architectures for high-performance and embedded systems.

• Preface.- Acknowledgments.- Why Accelerators, Now?.- A Taxonomy of Accelerators..- Accelerator Design Flow 101..- Accelerator Modeling.- Workload Characterization for Accelerators.- Accelerator Benchmarks.- Future Directions.- Bibliography.- Authors' Biographies .