Alexandra Jimborean

senior lecturer at Department of Information Technology, Division of Computer Systems

+4618-471 2973
Visiting address:
Room POL 1241 ITC, Lägerhyddsvägen 2, hus 1
752 37 UPPSALA
Postal address:
Box 337
751 05 UPPSALA

Short presentation

My research interests include compile-time and runtime code analysis and transformation, optimizations for performance and energy efficiency and software-hardware co-designs. I conduct research on compiler techniques to optimize energy efficiency by a decoupled access-execute model also available open source DAEDAL, and on the interaction between compiler and hardware, to achieve new levels of performance and energy efficiency. One such example is a compiler-assisted cache coherence protocol.

Keywords: compile-time code analysis optimizations parallel programming software-hardware co-designs energy efficiency performance

Also available at

My courses


I received my Bachelor degree in Computer Science, from Babes-Bolyai University, Cluj-Napoca, Romania (First Class Honours Degree), in 2008, followed by a Master degree in Computer Science, from Johannes-Keppler University, Linz, Austria, in 2009. I pursued my PhD studies in France researching in the area of automatic parallelization, by adapting the polyhedral model for dynamic thread level speculation (TLS), and I received the Doctoral degree in Computer Science, from the University of Strasbourg, France in 2012 (Advisors Ph. Clauss and V. Loechner). Next, I was a postdoctoral fellow in Uppsala University, Sweden (2012 - 2014) within UPMARC, a researcher (forskare) in UART, Uppsala University (2014 - 2015) and continued as Associate Senior Lecturer, since May 2015. I was a visiting researcher in University of Murcia, Spain (April-July 2015 and April-July 2016).


News: I was granted a VR starting grant (Etableringsbidrag) of 3.4 MSEK for my project "Optimizing for performance and energy efficiency with speculative compilers and co-designed hardware" (2017-2020).

A list of publications inlcuding prior affiliations is available here.

I had the chance to work closely with a very good team of undergraduate and graduate students that contributed to the projects decoupled access-execute and the suite of compiler-assisted cache coherence protocols:

  • Ph.D., Kim-Anh Tran, Uppsala University: Compile-time analysis and optimizations for power efficient architectures (main advisor, co-advisor Stefanos Kaxiras)

  • Ph.D., Christos Sakalis, Uppsala University: Software-hardware co-design with a focus on approximate computing (co-advisor, main advisor Magnus Sjalander)

  • Ph.D., Gustaf Borgström, Uppsala University: Cache simulation methods (co-advisor, main advisor: David Black-Schaffer)

  • Ph.D., Francisco Fernández, Uppsala University: Programming language extensions to guide compile-time code transformations (co-advisor, main advisor Dave Clarke)

  • Andreas Scherman, Extending the scope of compiler optimizations across synchronization points

  • Ahmad Awada, Automatic compile-time transformation of CUDA partitioned kernels for co-execution on GPUs

  • Per Ekemark, Advanced xDRF detection and real-world DAE evaluation

  • Erik Österberg, Profiling memory accesses on the ODROID-XU4

  • David Escher, Crowd simulation case study for an active-object language

  • Wenting Jin, Feedback compilation for decoupled access-execute techniques

  • Jonatan Waern, Automatic detection of xDRF regions

  • Dimitrios Giannakopoulos, Parallel Texture Synthesis utilizing GPU

Graduated students


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