Daniel A. Jiménez

I'm a Professor in the Computer Science and Engineering Department at Texas A&M University. My research is in microarchitecture and the interaction between the compiler and the microarchitecture. I've done a lot of work in branch prediction and cache management. I'm known for inventing the perceptron branch predictor as well as for other research. I was elevated to IEEE Fellow in 2021 for my work in branch prediction. I recently won the B. Ramakrishna Rau award "for contributions to neural branch prediction in microprocessors."

Before I came to Texas A&M I was Professor and Department Chair in the CS department at UT San Antonio. Before that, I was an Associate Professor (with tenure) in the CS department at Rutgers. My Ph.D. in Computer Sciences is from UT Austin. I grew up in San Antonio, Texas. I'm a dual citizen of the USA and Mexico.

For a detailed list of professional things I've done, see my CV. Also see my Google Scholar page.

FOR PROSPECTIVE STUDENTS

Teaching

Selected Publications

• Tanvir Ahmed Khan, Muhammed Ugur, Krishnendra Nathella, Dam Sunwoo, Heiner Litz, Daniel A. Jiménez, and Baris Kasikci, Whisper: Profile-Guided Branch Misprediction Elimination for Data Center Applications, Proceedings of the 55th ACM/IEEE International Symposium on Microarchitecture (MICRO-55), Chicago, Illinois, October 2022. Won the Best Paper Award. (pdf).
• Georgios Vavouliotis, Gino Chacon, Lluc Alvarez, Paul Gratz, Daniel A. Jiménez, and Marc Casas, Page Size Aware Cache Prefetching, Proceedings of the 55th ACM/IEEE International Symposium on Microarchitecture (MICRO-55), Chicago, Illinois, October 2022. (link).
• Georgios Vavouliotis, Lluc Alvarez, Vasileios Karakostas, Konstantinos Nikas, Nectarios Koziris, Daniel A. Jiménez, and Marc Casas, Exploiting Page Table Locality For TLB Prefetching, Proceedings of the 47th International Symposium on Computer Architecture (ISCA-2021), June 2021 (pdf).
• Brian Grayson, Jeff Rupley, Gerald Zuraski Jr., Eric Quinnell, Daniel A. Jiméenez, Tarun Nakra, Paul Kitchin, Ryan Hensley, Edward Brekelbaum, Vikas Sinha, and Ankit Ghiya, Evolution of the Samsung Exynos CPU Microarchitecture, Proceedings of the 47th International Symposium on Computer Architecture (ISCA 2020), Valencia, Spain, May/June 2020 (pdf).
• Elba Garza, Samira Mirbagher, Tahsin Ahmad Khan, Daniel A. Jiménez, Bit-Level Perceptron Prediction for Indirect Branch Prediction, Proceedings of the 46th International Symposium on Computer Architecture (ISCA 2019), Phoenix, AZ, June 2019 (pdf).
• Eshan Bhatia, Gino Chacon, Elvira Teran, Seth Pugsley, Paul Gratz, Daniel A. Jiménez, Perceptron-Based Prefetch Filtering, Proceedings of the 46th International Symposium on Computer Architecture (ISCA 2019), Phoenix, AZ, June 2019.
• Samira Mirbagher Ajorpaz, Elba Garza, Sangam Jindal and Daniel A. Jiménez, Exploring predictive replacement policies for instruction cache and branch target buffer, Proceedings of the 45th International Symposium on Computer Architecture (ISCA 2018), Los Angeles, CA, June 2018. (pdf).
• Daniel A. Jiménez and Elvira Teran, Multiperspective Reuse Prediction, Proceedings of The 50th Annual IEEE/ACM International Symposium on Microarchitecture (MICRO-2017), Boston, MA, October 2017. (pdf).
• Jinchun Kim, Elvira Teran, Paul V. Gratz, Daniel A. Jiménez, Seth H. Pugsley, and Chris Wilkerson, Kill the Program Counter: Reconstructing Program Behavior at the Last Level Cache, Proceedings of the International Conference on Architectural Support for Programming Languages and Operating Systems (ASPLOS 2017), Xi'an, China, April 2017. (pdf).
• Elvira Teran, Zhe Wang, and Daniel A. Jiménez, Perceptron Learning for Reuse Prediction, Proceedings of The 49th Annual IEEE/ACM International Symposium on Microarchitecture (MICRO-2016), Taipei, Taiwan, October 2016. (pdf).
• Elvira Teran, Yingying Tian, Zhe Wang, and Daniel A. Jiménez, Minimal Disturbance Placement and Promotion, Proceedings of the 22nd International Symposium on High Performance Computer Architecture (HPCA-22), Barcelona, Catalunya, March 2016. (pdf).
• Daniel A. Jiménez, Insertion and Promotion for Tree-Based PseudoLRU Last-Level Caches, Proceedings of the 46th Annual IEEE/ACM International Symposium on Microarchitecture (MICRO-46), Davis, California, December 2013 (pdf).
• Zhe Wang, Samira M. Khan, Daniel A. Jiménez, Improving Writeback Efficiency with Decoupled Last Write Prediction, Proceedings of the 39th International Symposium on Computer Architecture (ISCA-39), Portland, Oregon, June 2012 (pdf).
• Samira M. Khan, Zhe Wang, Daniel A. Jiménez, Decoupled Dynamic Cache Segmentation, Proceedings of the 18th International Symposium on High Performance Computer Architecture (HPCA-18), New Orleans, Louisiana, February 2012 (pdf).
• Zhe Wang, Daniel A. Jiménez, Program Interferometry Proceedings of the 2011 International IEEE International Symposium on Workload Characterization (IISWC), pp. 172--183, Austin, Texas, November 2011 (pdf).
• Daniel A. Jiménez, An Optimized Scaled Neural Branch Predictor, Proceedings of the 2011 IEEE International Conference on Computer Design (ICCD), Amherst, Massachusetts, October 2011 (pdf).
• Samira M. Khan, Yingying Tian, Daniel A. Jiménez, Dead Block Replacement and Bypass with a Sampling Predictor, Proceedings of the 43rd International Symposium on Microarchitecture (MICRO-43), Atlanta, Georgia, December 2010 (pdf).
• Samira Khan, Daniel A. Jiménez, Doug Burger and Babak Falsafi, Using Dead Blocks as a Virtual Victim Cache, Proceedings of the 2010 International Conference on Parallel Architectures and Compilation Technologies (PACT-2010), Vienna, Austria, September, 2010 (pdf).
• Renée St. Amant, Daniel A. Jiménez and Doug Burger, Low-Power, High-Performance Analog Neural Branch Prediction, Proceedings of the 41st Annual International Symposium on Microarchitecture (MICRO-41), Lake Como, Italy, November 2008. (pdf) (C++ code)
• Miquel Pericàs, Adrian Cristal, Francisco J. Cazorla, Ruben González, Alex Veidenbaum, Daniel A. Jiménez and Mateo Valero, A Two-Level Load/Store Queue Based on Execution Locality, Proceedings of the 35th International Symposium on Computer Architecture (ISCA-35), June 2008 (pdf)
• Daniel A. Jiménez, Piecewise Linear Branch Prediction, Proceedings of the 32nd International Symposium on Computer Architecture (ISCA-32), June 2005 (ps.gz) (pdf)
• Daniel A. Jiménez, Code Placement for Improving Dynamic Branch Prediction Accuracy, Proceedings of the ACM SIGPLAN 2005 Conference on Programming Language Design and Implementation (PLDI), June, 2005 (ps.gz) (pdf)
• Daniel A. Jiménez, Idealized Piecewise Linear Branch Prediction, The 1st JILP Championship Branch Prediction Competition (CBP-1), December, 2004 (co-located with MICRO 37) (ps.gz) (pdf) (Introductory PowerPoint slides from CBP) (Powerpoint slides for the predictor)
• Daniel A. Jiménez, Fast Path-Based Neural Branch Prediction, Proceedings of the 36th Annual International Symposium on Microarchitecture (MICRO-36), San Diego, CA, December 2003. (ps.gz) (pdf) (Java source code)
• Daniel A. Jiménez, Reconsidering Complex Branch Predictors, Proceedings of the Ninth International Symposium on High Performance Computer Architecture (HPCA-9), Anaheim, CA, February 2003. (ps.gz) (pdf)

News

• Daniel A. Jiménez Selected to Receive the IEEE Computer Society 2021 B. Ramakrishna Rau Award
• Jiménez inducted into International Symposium on Computer Architecture Hall of Fame
• Jiménez elevated to Institute of Electrical and Electronics Engineers Fellow
• Jiménez receives High-Performance Computer Architecture Test of Time Award
• Jiménez appointed interim chair of the Institute of Electrical and Electronics Engineers Computer Society Technical Committee on Computer Architecture
• Jiménez honored as 2017 MICRO Hall of Fame inductee
• Jiménez in HPCA Hall of Fame

Education

• Ph.D. in Computer Sciences,
  Department of Computer Sciences, The University of Texas at Austin
• M.S. in Computer Science,
  Division of Computer Science, The University of Texas at San Antonio
• B.S. in Computer Science and Systems Design,
  Division of Mathematics, Computer Science, and Statistics, The University of Texas at San Antonio

For Graduate Students Interested in my Classes

Quotes

Links

• The Comp.Theory FAQ
  I had a hand in writing this FAQ list for the newsgroup comp.theory . My stuff is where it says "the rest of this section was written by Daniel Jimenez."
• Amy Marquez
  This is my sister's web site. She is a high-tech worker of some kind in Seattle, Washington and would be appalled at this abomination I call a web page.