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  <h1>Home</h1>

<p><img alt="Akihiro" src="img/akihiro.png" /></p>
<h3 id="summary">Summary</h3>
<p>Dr. Hayashi is a Principal Research Scientist at Georgia Tech working at the intersection of programming models, compilers, and runtime systems for large-scale and heterogeneous systems. Most notably, he leads the design and development of the Fine‑grained Asynchronous Bulk Synchronous Parallelism (FA‑BSP) model, which unifies asynchrony with BSP structure to enable scalable and efficient execution of irregular applications. This work has been realized in the <a href="https://hclib-actor.cc.gatech.edu">HClib-Actor runtime system</a> and validated through publications in leading HPC venues, including SC, IPDPS, and ISC, as well as two Best SCALE Challenge Awards (CCGrid 2023 and 2024). </p>
<p>With over 15 years of experience in high-performance computing, Dr. Hayashi has contributed to externally sponsored research projects funded by organizations such as IARPA, IBM, ORNL, and SNL, serving as key personnel and technical lead in large-scale, single- or multi-institution collaborations. Additionally, he is an active member of the research community, having served on organizing and program committees for major conferences including ASPLOS, ISCA, and repeatedly for IPDPS and PPoPP. He has received several recognitions, including the 2024 Outstanding Research Scientist Award from Georgia Tech's College of Computing. His research interests include:</p>
<ul>
<li>Parallel and Distributed Programming Models</li>
<li>Automatic Parallelizing Compilers</li>
<li>Just-In-Time Compilers</li>
<li>Parallel and Distributed Runtime Systems</li>
<li>Machine-learning for Compiler/Runtime Optimizations</li>
<li>Resilience for Parallel and Distributed Systems</li>
<li>GPUs</li>
<li>Quantum Computing</li>
</ul>
<h3 id="recent-highlights">Recent Highlights</h3>
<ul>
<li>Please do not visit the previously used domain hclib-actor.com, which is now owned by an unrelated party. Instead please visit <a href="https://hclib-actor.cc.gatech.edu">https://hclib-actor.cc.gatech.edu</a>.</li>
<li>A full paper and two workshop papers co-authored by Dr. Hayashi have been accepted at IPDPS'25.</li>
<li>A full paper and a workshop paper co-authored by Dr. Hayashi have been accepted at SC'24 (<a href="https://sc24.conference-program.com/presenter/?uid=349953">link</a>,<a href="https://public.tableau.com/views/SC2024/Dashboard1?%3Alanguage=en-US&amp;publish=yes&amp;%3Asid=&amp;%3Adisplay_count=n&amp;%3Aorigin=viz_share_link%3AshowVizHome%3Dno">interactive chart</a>).</li>
<li>A full paper co-authored by Dr. Hayashi has been accepted at ISC'24 (<a href="https://ieeexplore.ieee.org/abstract/document/10528922">link</a>).</li>
<li>Dr. Hayashi received the 2024 Outstanding Research Scientist Award from <a href="https://www.cc.gatech.edu/">the College of Computing</a> at Georgia Tech (<a href="https://www.cc.gatech.edu/annual-awards-and-honors-past-recipients">link</a>).</li>
<li>Papers co-authored by Dr. Hayashi received the Best SCALE Challenge Award at IEEE/ACM CCGRID for two consecutive years (<a href="https://ccgrid2023.iisc.ac.in/awards/">2023</a> and <a href="https://2024.ccgrid-conference.org/awards/">2024</a>).</li>
<li>The IARPA AGILE project, where Dr. Hayashi leads the software aspect, started in September 2022. <a href="https://www.iarpa.gov/research-programs/agile-2">link</a></li>
</ul>


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