Computer Science Professor (dejankostic.com) and a photographer (pixels.com/profiles/dejan-ko…). Also dmkostic.bsky.social

Joined March 2009
18 Photos and videos
Just a regular June sunset in Stockholm…
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Very happy to announce that Giacomo Verardo defended his doctoral thesis! @marchiesa was the co-advisor and @GQMaguireJr provided stellar insights. More details and the link to Giacomo's thesis: kth.se/blogs/sfl/2026/05/gia…

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New postdoc opening in my DAI project on creating a highly energy-efficient and cheap platform for AI inferencing! The project blog gives more information on our recent work and the overall project vision: kth.se/blogs/dai/ kth.varbi.com/en/what:job/jo…

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Spring has arrived at the main KTH campus! #stockholm #sweden #kth
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New ad for a PhD position, new aurora picture! Large Language Models keep getting bigger and more capable, we keep trying to make inferencing much more efficient: kth.varbi.com/en/what:job/jo…
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Which form of communication should Large Language Models (LLMs) use when collaborating on a problem, e.g., one or two models processing the context and another model answering a question without seeing the context itself: plain text, hidden state, or some other way? (1/5)
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Interestingly enough, on two data sets KVComm even exceeds the performance of an approach that gives both the context and the question in text to the model answering the question. Our approach works even for different LLMs that are fine-tuned from the same base model. (4/5)
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More details about work, including links to the paper and source code at the blog site below: kth.se/blogs/dai/2026/01/our… Xiangyu Shi @GQMaguireJr @marchiesa (5/5)

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Happy to announce that Daniel Perez successfully defended his PhD thesis on February 12, 2026! This thesis uses ML to solve resource allocation optimization problems and demonstrates 100x scaling in problem size. kth.se/blogs/nslab/2026/02/d…

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14 Oct 2025
Absolutely magical on the main KTH campus these days (image from Sunday)… #kth #Stockholm #Sweden
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Beautiful October evening in Stockholm, Aurora and reflections…cannot ask for more!
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Dejan Kostic retweeted
Congratulations @WangChangjie13 on receiving the 2025 Applied Networking research prize for our NetConfEval work! 🏆 Now, let’s work on making LLMs also reliable and sustainable for code generation! 🚀 irtf.org/anrp/

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11 Dec 2024
1/3 At CoNEXT ’24, @Skazza_94 presented our FAJITA paper for running stateful network functions at very high rates (~1.4 Tbps). PDF video are at the @ERC_Research CoG ULTRA blog post below. Click below to see something perhaps unexpected in this work. bit.ly/4g63His

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11 Dec 2024
2/3 Unless the number of so-called “elephant flows” is very small, spreading incoming packets among the cores using plain Receive Side Scaling (RSS) outperforms existing approaches that perform fine-grained flow accounting and load-balancing.
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11 Dec 2024
3/3 This happens because possible gains get dwarfed by slowdowns in accessing memory. @ghasemirahni @alirezafarshin @marchiesa @GQMaguireJr
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26 Nov 2024
I am continuing to look for two more PhD students who wish to work with us on creating a dramatically more energy efficient and cheaper platform for AI inferencing (deadline Jan 17, 2025): kth.se/lediga-jobb/768308?l=… 1/3

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26 Nov 2024
We cannot promise sunsets and Aurora sightings like these, but we can promise an exciting research environment and lots of academic freedom! 3/3
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