Too Many Social Media Accounts & Boycotts

 

As people were moving away from X and joining Bluesky after the US elections in November, I was thinking how I ended up having accounts across five social media platforms that I regularly, almost daily, check. Why did I need all these accounts? Why did I feel the need to check them relatively frequently? Did I need to add one more account to that list now? …

In my ideal world, I would keep at most two social media accounts: one for private stuff and one for work. But we don’t live in that world. My consolation prize is I don’t have any of the corresponding social media apps on my phone.

 

My entry to social media was with Facebook. It was the second half of the 2000s. I was a BSc student at Koç University and a member of the university’s cinema club. I wanted a way to announce our events more effectively, beyond putting tiny A4 posters around the university. [1] Facebook seemed to be the platform people used for such things. So, I created an account but wasn’t a frequent user back then.

Then came the LinkedIn account in 2009 shortly after I became a PhD student at EPFL. I don’t remember why I joined exactly, but I assume it was probably because other PhD students were joining. I used to log into LinkedIn only when someone sent a connection request or when I changed jobs.

I got into Twitter, now known as X, in 2012, while still a PhD student. My goal was to use it for work and that hasn’t changed. How frequently I used the platform has changed, though. In the beginning, I checked it and posted there very infrequently.

I created an Instagram account in December 2020 to follow one person, Judith Liberman, whom I mentioned in a previous blog post about fairy tales. She has been a healing influence in my life, and Instagram is unfortunately the only platform to follow her properly.

Finally, I got a Mastodon account in late 2022, after Elon Musk bought Twitter. That was the first trigger causing many to flee Twitter. However, it didn’t stick, so I got stuck with both Mastodon and Twitter.

 

Which brings us to the state of affairs today.

I started using Facebook more frequently after moving abroad. It was a way to keep connected to people as I moved from place to place. Facebook is also the most effective platform for keeping up with the events at your favorite local small independent cinemas, theaters, concert venues, etc. While these days Facebook shows too many ads, if you use the free version, most ads I see are about cultural stuff as well (Ursula K. Le Guin quotes – somewhat ironic to see on Facebook, The Atlantic / New Yorker articles, Taylor Swift news ...) and at times helpful (I discovered Say Nothing through Facebook).

Last few years, it has become more common to use LinkedIn for work announcements in academic circles. Staying connected to my research community and having an effective platform to do work announcements is important to me. As a result, I became a more frequent user of LinkedIn as well.

I became a more active Twitter/X user after I moved to Denmark. Combination of being away from Bay Area, Mecca of our profession, and my increasing responsibilities as a professor made the platform more appealing to post work news and follow posts of others. Up until the latest US election, X was the best platform for staying connected to my work community. Since my main goal has always been to use X for work, I (almost) only follow the people I know through work on X. Therefore, I see non-work-related posts only if the people I follow post them. After Elon bought the platform, I started seeing posts of him in my feed, even though I have never followed him. Before I figured out the “For You” vs “Following” tabs at the top, my solution was to block him. Then, I decided to keep him blocked. After many people fled to Bluesky, I stopped using X actively.

My 3-following-and-2-followers existence on Instagram didn’t last long, as people discovered I am on Instagram as well.

And I kept Mastodon active, if not as active as X, with the hope that one day it may become as effective as X for work posts.

Today, I also use all these platforms, except for LinkedIn, to announce my blog posts. On X, I have a separate account for this, though.

 

As people were migrating to Bluesky as a boycott to X’s owner, my first reaction was “I don’t want a 6^th social media account.”

If the motivation is to move away from the political manipulation of too-powerful tech bros, Mastodon makes more sense as a platform because of its mode of operation; it is open source and self-service. Our Mastodon server at ITU is run by Sebastian Büttrich, who is in our research group. The computer systems community has discuss.systems. In Mastodon, we have more control!

One the other hand, Mastodon hasn’t gathered enough attraction among the work circles I would like to be connected to. I have less than 1/10^th of my Twitter/X followers on Mastodon. 1/3^rd of the folk that follow me are colleagues at ITU. I don’t know how/if I can boost it better. I already share a physical workspace with my ITU colleagues, so my social media presence isn’t really for them. Most of the time, I feel like I am posting for myself there, which I don’t mind on a platform like Instagram, since it creates a blog-picture diary for me, but this isn’t why I use Mastodon. If I want to post an announcement about an open PhD position or travel grant for a conference, I would rather be on a platform that can deliver that announcement to the right set of people. Unfortunately, Mastodon is far from doing that at the moment, and I don’t hear relevant work news on Mastodon either.

So, eventually, I will choose the easy way out. I will get a Bluesky account at some point in 2025, even if I don’t want to.

 

My conflict with creating a Bluesky account reminded me of my conflicting relationship with boycotts, since what triggered all this was people boycotting X. Boycotts are also an important topic these days due to ongoing wars.

I come from Turkey, which is a country that is an easy target for boycotts. I wrote a relatively frustrated blog post back in 2017 on this matter. There have been famous cultural figures (e.g., Bono, Paul Auster) who stated that they won’t visit Turkey due to its human right violations, issues with freedom of press, etc. I know some people who told me that they won’t visit Turkey as long as Erdoğan is in power. I respect and support these causes (even though I don't like Bono). However, at times, such statements feel strange to hear about a place where my primary connection is love. I don’t mean nationalism, which I am a grinch for. I mean feelings of tenderness for some place and the people who live there even if you don’t like everything about it / them. I love visiting Turkey and hope that I will always be able to visit it. This doesn’t mean that I support the human rights violations, lack of freedom of press, or Erdoğan. [2]

I know boycotting a social media app, a person of power, and a country are all different. However, whether it is an app, a person, or a country, it is easier to boycott something when you don’t strongly depend on it or don’t have a strong relation to it. In other words, being able to boycott may be a privilege that we don’t realize. This is why someone like Bono will never boycott the USA no matter what it does or whoever its president is.

I am very open to discussing different views on this and being educated if anyone has good recommendations for reading or listening on the impact of boycotts. I listened the “BDS and the history of the boycott” podcast episode earlier this year but didn’t hear anything new. For example, do economic boycotts usually benefit or cause more harm in the end? Don’t people’s isolation and deteriorating economic conditions, due to boycotts, help the authoritarian leaders in a country? Isn’t this a double-punishment of people in that country who do not support such leaders? … Overall, I have a lot of questions and dilemmas when I think about boycotts, and, as I said, I am open to discussing and learning.

 

[1] Orthogonal but related anecdote: I was once confronted by some guys from the university’s American football team for putting up A4-size cinema club event posters on top of their giant posters advertising an upcoming party. Needless to say, they were each multiple times my size. In my defense, there was no space left on the announcement boards due to their giant posters. I managed to defend our posters.

[2] I remember the days when Erdoğan was being presented as the face of modernizing Turkey by the western media and having to explain myself to some Europeans, since they were asking me why I don’t like him. I also remember the days when the EU gave him a lot of money, hence supporting him, so that he keeps the refugees away from the Europeans.

 

PhD#1: Ties Robroek

Overview of Ties' thesis work. Preprint of the thesis can be found here.

Note: Yesterday my first PhD student, Ties Robroek, defended his thesis! I said some words about him after the defense. The text below was my write-up to be prepared for those words. The speech itself was of course slightly different.

 

I sent the email offering my first independent PhD position to Ties on June 6^th, 2021, at 11:07am. At 12:10pm, I received a reply that said “… I accept your offer …” with a level of enthusiasm that made me think “No one has ever been this excited to hear that they will work with me. That is nice.” Then, I made a mental note “He has to learn not to accept any offer before seeing the contract first.”

 Ties started on September 1^st, 2021, less than two weeks after I was done being the general co-chair of VLDB 2021 and 3.5 years after I joined ITU.

I finally had what I wanted, my own PhD student.  I was very happy, but as is often the case when you are doing something for the first time, I wasn’t sure about many of the things I was doing. Of course, I had supervised many other BSc/MSc/PhD students before, but, with Ties, for the first time I had full responsibility for someone else at work. It felt like I could make or break his career. Furthermore, the project was on a topic that was relatively new to me, ML not databases, which added to the feeling of unsureness.

But here we are today, so it all worked out.

I think there were two key reasons why it worked out.

First, we managed to have an open dialog, especially when it came to our doubts. We didn’t agree all the time, but that never hindered the open dialog.

Second, Ties took initiative early on. From the beginning, his attitude was “You know hardware, but not machine learning, so I will work to be the one providing the machine learning expertise in the team.”  Luckily, he is a data scientist at heart, so embracing that responsibility came naturally to him.

Overall, Ties has been great at combining his data scientist identity with computer systems research. One of the first things he did was to create the radT platform, on top of MLFlow. I didn’t tell him to do that, at least not explicitly. Based on what we discussed, it was clear that we needed a systematic way to do benchmarking and collecting experimental data, and radT was his solution for that, which later became the first contribution in his thesis. Since then, radT kept evolving and is used in several research (BSc/MSc/PhD-level) projects hosted by our research group.

Furthermore, while implementing radT and any other codebase that later became part of his thesis, Ties’ primary design goal was always “I want a data scientist to use this, so it needs to come with minimal impact to their code.” I appreciate this perspective, and we “computer systems” people need to remind this to ourselves regularly.

Also, some fun stuff.

 

When someone shared the meme below with me in a group chat, the first person I thought of was Ties, so today he will get a card with this image on.

Note: I don’t know the original source for this picture, but a quick search led me to this LinkedIn post.

 

Speaking of cards, once I asked Ties to get a card for a lab member’s departure. Ties kindly accepted the request, but asked “So, your generation, whichever letter you are, where do you buy cards?” (If, like Ties, you don’t know the answer to this question; supermarket works.)

 

Earlier this year, Ties made me realize that I had been mispronouncing the word gouda. 

 

If you ask Ties “What do you recommend doing in Amsterdam?”, he will likely give you the answer “You can take the train to another town.”

 

Finally, we all have different ways of dealing with stress. While I was writing my thesis, I took a walk almost every day near Lac Leman, usually listening to Tori Amos’ Scarlet’s Walk. In contrast, Ties did a triathlon and a DHL run within the last two weeks of his thesis submission deadline. At one point I was worried that he will kill himself before submitting his thesis. Then, one week after his thesis submission, he did something called Nordic Race. Looking at its website, Nordic Race seems like an event designed to help people enter Valhalla.

Anyway, I am glad he is still alive and is now a Dr.

Thick Skin

 

The first time I attended a Dagstuhl workshop was in 2017.

From my experience, people who aren’t computer scientists, even in Germany, don’t know what or where Dagstuhl is. Thus, first an intro.

Dagstuhl is a, not-that-easy-to-reach, place in Germany that allows computer scientists to organize workshops quite cheaply. The workshops are invitation-only, and the crowd is kept to ~60 people. The goal is to focus on a research topic with experts for either half a week or a whole week. It is a big deal to get invited to one. Therefore, I was quite excited to attend one.

The first day of the workshop, we had a session, where people could sign up to give a short presentation on a topic that would potentially trigger discussion among the attendees. I did sign up. I gave my presentation. Except for a couple comments, the reactions weren’t that encouraging, and I received a somewhat personal, non-technical, negative comment as well.

For the purpose of this post, the topic of my presentation, the man who shouted out the personal comment, or the comment itself doesn’t matter. This man apologized to me the next day, which I appreciated. I have received nothing but respect from him since then, and he is someone I have high respect for as well.

The important thing is how I felt after that presentation, especially as a result of that comment.

I wished the week to be over and to get out of there. I was annoyed that Dagstuhl is out of nowhere, which is on purpose, so that people have very little distractions and can focus on thinking “big thoughts”. But if I could spend a few hours away, in a city, I could have more easily cleared my head and found focus again. I thought I would never want to attend another Dagstuhl workshop. I felt alone. I didn’t want to talk to anyone. I left the evening social activities early to lock myself in my room. I over-drank one evening. My plan was to visit my cousin and his family, who live in Stuttgart, after Dagstuhl. I looked forward to seeing my cousin, a man, whom I had a very different relationship to, one that didn’t require any armor, compared to the men who surrounded me in Dagstuhl.

The next time someone reached out to me for a Dagstuhl workshop, it was 2019. I was asked by Goetz Graefe and Caetano Sauer to co-organize one, also together with Allison Lee and my academic sister Renata Borovica. That was hard to say “no” to, and that was the workshop that healed my relationship with Dagstuhl and helped me to get rid of most of my armor in similar work events.

 

With the distance of the years, I can now say that most of the comments after that presentation, even though not super encouraging, helped me develop better technical arguments and realize what I should have made clearer while presenting that particular topic. That is the thing with the technical comments. Even if they may sound negative or aren’t expressed in a constructive way, they can still help you improve yourself for the next presentation, discussion, paper or grant submission, project, system design ... This is one of the reasons why I love giving presentations and receiving comments and questions on them.

However, I cannot play pretend and put a positive spin on that personal comment even today. It was not ok. But was it really “I want to get out of here” bad? Would it make the same kind of impact on me today? Why did I have such a “thin skin” back then?

 

Earlier this year, I read (or audibled to be more exact) Roxane Gay’s Opinions: A Decade of Arguments, Criticism, and Minding Other People's Business.

Roxane Gay is one of my favorite authors. I once met her in Copenhagen airport. We were on the same flight. I saw her sitting in the waiting area of our gate, but no one else seemed to realize that she was there. I approached her and asked, “Are you Roxane Gay?”, to be sure. She confirmed. I told her that I really loved her writing. She thanked me and asked me for my name. Then, we shook hands. That was pretty much it. I preferred to keep the interaction brief, partly because I didn’t want to bother her in her private time and partly because I thought my heart was about to find its way out of my body based on the way it was pounding.

In Opinions, Roxane Gay writes about the “thinning of the skin”. Her argument is if a person or a group of people, such as minorities, are often subjected to comments or interactions that are hurtful or painful, their skin will become thinner. Hence, they will be more sensitive to any comment and may have more triggers. This argument contradicts the popular belief, at least the one I more often heard, that the more you face harsh comments or painful events the thicker your skin gets. She also questions the glorification of thick skin pointing out that thick skin implies the lack of feeling emotions.

 

This year, our department had its annual retreat in September, while I was in California for the HPTS workshop. In these retreats, we can propose to run a session on a topic we deem important such as well-being of PhD students, grant writing, finding collaborators ...

One of our colleagues, Louise Meier Carlsen, proposed to run a session on Advancing Gender Equality in (everyday) Academia. She asked the female faculty, postdocs, and PhD students to anonymously share some of the things we endured that can be put under categories such as harsher comments, dismissal, isolation, sexual behavior, etc. at work. Her goal was to avoid potential dismissive comments such as “these are isolated cases” by collecting data from a variety of women in the department.

On the last day of HPTS, I took some time to write about my experiences including the one from my first Dagstuhl workshop. I was grateful to Louise for running this session. It was helpful to write but also grim to realize that I could write so many things in such a short time. Similarly, it was both helpful and grim to read what others wrote.

 

Do I have thicker skin now compared to my pre-30s?

While I will never be a poster child for thick skin, I think the answer to this question is yes.

Did I develop that thicker skin because of all the shit I wrote about for Louise’s session? Or did I develop it thanks to all the people who supported or acknowledged me on the way making me realize that there are people who believe in and respect me regardless of those discouraging personal comments and interactions?

Before reading Opinions, I believed, somewhat uncomfortably, the former, because that is what I was taught by society, but the latter makes a lot more sense now.

 

Running to Schiphol

Last Thursday, I flew to Amsterdam for Tim Gubner's PhD defense. The defense was on Friday. I booked an extra day for myself in the city, since I like Amsterdam and I thought it would be a nice break after the extra-busy September.

I have been to Amsterdam many times at this point. This time, I did two things differently.

Firstly, for the stay, I picked a part of the city that I haven’t stayed before to explore something different, meaning I chose a hotel that was not 10-20mins walk to the central station. This choice came with the extra benefit of an additional m2 at a cheaper price for my stay while still being in a central location. 

Second, I didn't inform any of my friends living in the area, since I needed some time for myself, like it is expressed in that beautiful Lucinda Williams song Side of the Road. 

And I had a lovely day in Amsterdam.

Then, it was time to go back. From my hotel, the easiest route to the airport was taking bus 397 from Museumplein. My bus ride on the way to the hotel from the airport was ~30mins.

I was at the bus stop around 16:00. There seemed to be some delay in the bus schedule according to Google Maps, and I could see the traffic in front of us, but the cars still moved, and the bus came earlier than what Google predicted, so I got on it ~16:10. The bus moved slowly but steadily, so I decided to chill and turned on audible to continue listening to Kelly Bishop's memoir, The Third Gilmore Girl.

From the memoir, I learned that Kelly Bishop is a Tony-award-winning actress and dancer who has been rocking being a childless cat & dog lady since at least the 60s. As a Gilmore Girls nerd, I knew her as one of the pinnacles of the Amy Sherman-Palladino TV-universe, most notably for her role as Emily Gilmore, the mother to Lorelai Gilmore and grandmother to Rory Gilmore. The first time I watched the show, the mother-daughter relationship I focused on was the one between Lorelai and Rory. As I got older, in my Gilmore Girls rewatches, I became more drawn to the relationship between Emily and Lorelai and highly appreciated the existence of a matriarch like Emily on TV.  

Emily Gilmore is also part of my TV battle crew, which, in addition to Emily, includes Sister Michael from Derry Girls, Olenna Tyrell from Game of Thrones, Xena from Xena: The Warrior Princess, Buffy from Buffy the Vampire Slayer, and Villanelle from Killing Eve.

Let's get back to the bus, which stopped moving somewhere after two stops. It was 16:45. I had been in the bus for more than 30mins at this point.

My flight was at 18:45. I prefer being at the airport at least two hours before for within-EU-flights, since there are no passport and visa checks. I aim for three hours, otherwise. In other words, I was already late based on what I was aiming for. While there was no reason to panic yet, it was time to put Kelly and my battle crew on pause and start thinking about alternatives.

I checked Google Maps again, but it wasn't able to show me a solution. There was a tram stuck in front of us and heavy traffic left and right. It was too far to walk to the Central Station at this point (~1hour), and I wasn't sure which other station I could check. I didn't know how to call a taxi in Amsterdam, but even if I did, I wasn't sure how a taxi could enter that mess or where to walk to in order to call one. In the meantime, we managed to move a little bit, but not by much. There were no announcements by the driver. Some asked the driver to open the doors so they could leave, but all the people with luggage remained in the bus, so it wasn't only me who didn't know a better way to get to the airport.

I decided that it was time to ask for help. I approached the closest person with luggage, who was a young lady (will call her Helper Sister from now on): "Do you know any other way to get to the airport?" She shook her head and said: "No." She looked worried.

More passengers became audible asking similar questions. Some started to move toward the front of the bus, and Helper Sister and I followed. Helper Sister started chatting with another lady in Dutch. Afterwards, she told me we would get off the bus and call a taxi.

Getting off the bus took some time, since the check-in/out system of the bus was disabled and people wanted to check-out before getting out. Eventually, people simply accepted that they would have to get out of the bus without checking out.

As soon as we got out, the tram in front of us started moving. The bus door was still open, so we got back in, and the bus started moving, but only to get stuck again in a short-while. 

At this point, I started thinking "They probably have another flight to Copenhagen in the evening. It is Saturday night, it shouldn't be difficult to find space in it. In the worst case, I'll stay one more night in Amsterdam." Helper Sister was on the phone talking to someone. The driver got off the bus to talk to some other drivers who were stuck in their cars behind us and came back with no news about what was going on.

Then, Helper Sister ended her phone call and told me: "I will leave and try something else, you can come with me." I replied: "OK."

It was ~17:15. We got off the bus. She mentioned something that I didn't fully get, but I remember hearing "I think it will be faster. But we need to walk." I said, "I am fine with walking." I blindly followed her as we alternated between fast walking and running. When we were at a spot where our side of the road was empty, meaning the cars could move, she started hitchhiking. It was the second time in my life I was hitchhiking. The first car we saw stopped. It was a mother and daughter in one of these small cars that requires the people in the front to exit the car in order for people to sit in the back. We did that at the side of the road and took our luggage on our lap. My luggage was a carry-on, but Helper Sister's wasn't.

Helper Sister told them directions in Dutch while in parallel explaining the situation. At least that is what I assume, as I can't really comprehend Dutch. We started to approach an Amsterdam Zuid sign, and I finally got the plan.

Where we got stuck in the bus was south of the city, which was closer to the Amsterdam Zuid station, where one can take a train to the airport. I don't know if hitchhiking was always part of the plan or if Helper Sister assumed we can walk/run to Amsterdam Zuid and improvised on the way.

We thanked the mother and daughter, they were lovely, made it to the 17:35 train, and were at the airport at 17:45. I was at my gate at 18:05 and ate a gevulde for dinner.

Helper Sister and I went our separate ways once at the airport since we were on different flights, but I thanked her a bunch before that. I don't know her name, she doesn't know mine either. The only thing I know about her is that she had a flight to Heraklion at 18:40 on that Saturday and she can speak Dutch. I don't know why she picked me from that bus full of passengers. Was it simply because I reached out to her for help? In any case, I am very grateful. I hope she had or have been having the time of her life in Heraklion.

Public Reading of Ongoing Works & on Breakfast

Breakfast has always been my favorite meal of the day.

When I was a kid, my dad prepared the breakfast table for us, unless he was extremely ill or away. He is still the one who prepares breakfast at home. This is simply because he wakes up really early (~5am) as opposed to my mom who prefers sleeping longer.

After I moved away from the home my parents gave me, and lost the privilege of being served breakfast, I very rarely skipped it even if I had to rush it on some weekdays. In contrast, I don’t mind skipping lunch or dinner on a busy day.

After I moved abroad, I realized that not every country gives as much importance to breakfast as my home country. Then, breakfast became the main meal that brought me back together with family and friends.

 

Since the beginning of this year, I have been experimenting with writing a play that takes place around a breakfast table that brings back old friends. I have worked on it one evening each month on average. It has been evolving, but it is still a baby, and it will keep evolving. A part of the current draft will be read in public on August 28th at LiteraturHaus. The event is free, starts at 8pm, and also includes the works of other creatives that I had the chance to meet during this year in a writing course led by Paul Gordon. I cannot vouch for the quality of my work, but I heard excerpts from the works of others, and I can vouch for them. 

The Facebook link for the event is here.

The ticket link is here (it is free, this is just to keep the count).

Homesickness

Early in the movie Oppenheimer, Oppenheimer is asked whether he was happier in Cambridge, UK compared to in his home country, USA. He answers, “No. I was homesick and emotionally immature ...”

I watched Oppenheimer at delphi LUX during my sabbatical in Berlin to complete my Barbenheimer, more than a month after I watched Barbie at Cinema Victoria in Cluj after VLDB Summer School. (I watched Barbie two more times afterward.) As soon as I heard Oppenheimer’s answer, I searched for my notepad and pen in my bag in the dark of the movie theater. I scribbled the answer in my notepad without seeing what I was writing. It was an answer I could deeply relate to when I think of the years I lived in Lausanne, Switzerland.

 

Whenever I visit Turkey, it is common for me to receive a question that starts with “Do you miss …”

Do I miss Turkey / Istanbul? No. I miss my parents, close family members, and friends, but not the place. 

Do I miss Zonguldak (my hometown)? No. I visited Zonguldak once in 15 years. Most of my family and friends don’t live there anymore.

Do I miss the food in Turkey? No. My eating habits used to be mocked by the fellow Turkish PhD students at EPFL for not being Turkish-like. This topic even found its way into my PhD defense ceremony video prepared by close Turkish friends. Also, I don’t need to be in Turkey to prepare the food I like for myself, since I am not picky about having the exact ingredients. Finally, as my dad likes to say, “The important thing is not the food on the table but the people around it!”

This doesn’t mean that I don’t love and care about Turkey or I don’t like visiting it and eating the food there. At this point in my life, being able to speak with people who can comprehend what I say in my native language is a luxury, and, sure, the tomatoes taste much better in Turkey. The difference is I don’t long for places or food anymore the way I did back when I lived in Switzerland. I only feel homesick for the people, and my people are scattered around many places.

I wrote about Home back when I lived in San Jose. It was my time there that made me redefine homesickness. First, San Jose became a generous home for me over time; it made me realize that I can have homes at other countries. Second, its distance to Turkey, compared to Switzerland, and the longer stretch of time I spent there without visiting Turkey forced me to look at the bigger picture; I can bare not visiting Turkey if I have to, but I need to find ways to visit the people that are part of my home or to have them over for visits.

These days, I am lucky that I get to feel like I arrived home in Copenhagen, Istanbul, Chicago, Paris, London, Stuttgart, Munich, and maybe even Zurich. Except for Copenhagen, this is because of the people that welcome me in these locations, value my presence regardless of my work affiliation, and give me a place to crash and let go of my armor.

 

During my sabbatical last year, I visited Copenhagen twice. The first visit was roughly after a month of stay in Berlin. It wasn’t because I missed Copenhagen. I wanted to attend ITU’s Teaching Award ceremony, since I was the recipient of the award that year. It was also a good excuse to see Sister in Movies and other buddies in Copenhagen. After the Hamburg-Copenhagen train passed the Danish border, I started to hear more and more Danish around me compared to German. This triggered an unexpected feeling of calm. I was back in the land where I built another home.

 

When I lived in Lausanne, whenever I arrived in Geneva airport, I felt disappointment.

When I lived in San Jose, whenever I was coming back to US from Turkey, I was upset at the airport in Istanbul but was fine by the time I landed in San Francisco.

Now, I look forward to arriving in both Istanbul and Copenhagen.

I recently re-read A Game of You; the 5^th volume of The Sandman series. It is hard to pick a favorite from The Sandman, but if I absolutely had to, I would pick A Game of You, which also has a Barbie character. It was that Barbie that I quoted in the Home post: “I don’t think home is a place anymore. I think it’s a state of mind.” I am grateful for all the people and the places that help me enter that state of mind.

Rejections: Tale of Two Papers

My (rad) research team at EuroSys 2024; from left to right, Ehsan, me, Robert, Ties. After I introduced them to Gustavo Alonso, he asked if I had a height requirement for my PhD students.

I have already written about the rejections in academia once (in a post titled Rejections). This is a never-ending story for most academics. Recently, two papers from my group got published and presented at conference workshops after 5 and 4 rejections from conferences, respectively. Hence, I decided to revisit the topic of rejections by focusing on these two papers.

Before I start with the individual papers, I would like to acknowledge a few things.

First, I have bias with respect to my own work. The main reason I work on what I work on is because I find the topic exciting and important. Otherwise, I wouldn’t be working on it.

Second, like everyone I know, I have a drive to share what I find exciting and important with others. That is why I welcome any opportunity to present our work and enjoy writing about it in the form of academic papers. Through this dissemination process, we share and build knowledge, get constructive criticism from our peers to improve the work, and start collaborations and new research directions. Not everyone shares the same level of excitement on the same research topics, though, and there is always room for improvement in a work. As a result, sometimes the feedback you receive sounds discouraging. This discouragement combined with the high dependency of one’s career on publications makes rejections difficult even though we all know that they are inevitable in our profession.

Third, I am aware that my health is the most important thing, and nothing I do or accomplish at work makes me as happy as the time I spend with the people that make me feel at home or at a movie theater or the beach. But I don’t want to diminish people’s career ambitions, especially in a world where women’s career ambitions are still under-supported, by over-emphasizing these cliché-but-true health and happiness statements.

 

An Analysis of Collocation on GPUs for Deep Learning Training

Ties Robroek, Ehsan Yousefzadeh-Asl-Miandoab, Pınar Tözün

EuroMLSys 2024 - https://dl.acm.org/doi/10.1145/3642970.3655827

This paper characterizes the performance of the different task collocation methods available on NVIDIA GPUs for deep learning training. The motivation came after realizing that not everyone that trains deep learning models is <insert your favorite big tech company here>. Thus, not every model training needs many GPUs or even the entire resources of a single GPU. This means that if we always train one model at a time on a GPU, that GPU is likely a wasted resource. Wasting hardware resources is a waste of money and energy inefficient. Studying how deep learning tasks can effectively share the resources of a GPU, therefore, made sense and was a relatively under-researched subject at the time.

We started back in September 2021 when my first PhD student[1] Ties Robroek joined my 1-person team. A couple of MSc students, Anders Friis Kaas and Stilyan Petrov Paleykov, were also interested in the topic for their MSc thesis project. The initial team was formed. 

We started with an investigation into the MIG (multi-instance GPU) technology, since it was the newest thing offered by NVIDIA GPUs at the time. MIG allows a GPU to be split into smaller units enabling task collocation with isolation guarantees.

1^st reject: The MSc students finished their thesis in June 2022. SoCC (ACM Symposium on Cloud Computing) paper submission deadline was around that time. We submitted the work from their thesis there. It got rejected with overall constructive and encouraging reviews. The main issue was people thought the paper didn’t have enough lessons-learned to warrant a SoCC publication. However, we got clear ideas for improving the paper for a possible resubmission. The key suggestion was to expand the study beyond MIG and add a comparison to other collocation methods on NVIDIA GPUs namely multi-streams and multi-process service (MPS).

2^nd reject: For this submission, we included EhsanYousefzadeh-Asl-Miandoab, my second PhD student, in the study. The entire paper was almost redone. We submitted the outcome to MLSys (Conference on Machine Learning and Systems) in fall 2022. It got rejected again. While the reviews were slightly less encouraging than SoCC, they were overall constructive. The reviewers didn’t find the results surprising enough, asked for deeper analysis on some experiments, suggested adding more diverse deep learning models to the study, and asked for scenarios that involve multiple GPUs.

3^rd reject: Following the MLSys reviews, for the next resubmission, we added more diverse models, dug deeper into certain results, changed the metrics we report to give a finer-grained picture for the GPU resource utilization, and wrote clearer guidelines for when it makes sense to use each collocation mechanism. The last point was to address the “no surprising result” comment. Since we cannot create surprising results out of nowhere, wrapping them up in clearer “take-away messages” made more sense. Finally, we deemed multi-GPU case out-of-scope for this study, since I strongly believe in the importance of optimizing things for the smaller scale as much as the big scale.

The resulting paper was submitted to ASPLOS (ACM International Conference on Architectural Support for Programming Languages and Operating Systems) in Spring of 2023 and was rejected once again. The workload diversity was praised by some reviewers, while some others asked for alternative workloads. However, the unsurprising results and the lack of deeper insights were once again the main issues.

4^th reject: I was overall optimistic after the first two rejects, because we had clear ideas for improving the paper for a resubmission. I think the paper indeed got substantially better as a result of those resubmissions. However, after the 3^rd reject, I didn’t know how to improve the paper anymore. We couldn’t mockup unstraightforward results. Further in-depth analysis wasn’t easy due to not every GPU hardware detail being openly shared by the vendor. Of course, one can always apply extra analysis through more profiling and add more workloads to the study if one has infinite time. However, I thought it would be better for the students to move onto the next stage/work in their PhD at this point. They also had the desire to move on. So, we decided to resubmit the paper to HPCA (IEEE International Symposium on High-Performance Computer Architecture) during the summer of 2023 without making extensive changes to it this time around. It got rejected with similar reviews to ASPLOS.

5^th reject: In one last attempt, we resubmitted the paper to SIGMOD (ACM International Conference on Management of Data) in fall of 2024 with extra results but not substantial changes. I wasn’t sure if SIGMOD was the right venue for this type of work, but as a SIGMOD reviewer I have seen papers on utilizing GPU resources better for deep learning being welcomed by some, if not most, of the program committee. I also thought that the insights we deliver on GPUs may be interesting to the data systems community. We got rejected again mainly due to straightforward lessons-learned and the topic being a borderline fit for SIGMOD.

Accept: Finally, I decided to stop trying to force this paper into a conference. Even though the amount of work we put into it was a lot, our findings were clearly not enough for a conference publication. In my team, we really like the EuroMLSys workshop (Workshop on Machine Learning and Systems) that is collocated with the EuroSys conference. Therefore, it was a natural choice for us, and the paper got accepted with a presentation slot at EuroMLSys 2024.

 

Reaching the Edge of the Edge: Image Analysis in Space

Robert Bayer, Julian Priest, Pınar Tözün

DEEM 2024 – https://dl.acm.org/doi/10.1145/3650203.3663330

This paper characterizes the performance of several resource-constrained hardware devices to determine their suitability for an image-filtering task on a small (hence, extra-constrained) satellite.

The roots of this paper also go back to 2021, though, the actual work on our end didn’t start till Spring 2022. In 2021, Julian Priest joined our lab. He is the main representative of the DISCO (Danish Student CubeSat Program) at our university. DISCO is an educational project that involves several Danish universities. It gives the students the opportunity to design and operate a small satellite. The target use case is Earth Observation; more specifically taking images of Earth from the satellite and analyzing them. The challenge with this use case is that the communication link between the Earth and the satellite isn’t your typical on-Earth internet connection; it is weak and temporary. Hence, sending all the images captured on the satellite is not an option. There is a need for image filtering on the satellite to send to Earth only the images that are of substantial interest. This need for filtering images leads to a follow-up challenge: the computation power that can be deployed on a small satellite is also small due to both space and power restrictions of the satellite. Hence, there was a need to identify the hardware device(s) to deploy on such a satellite that can satisfy the required size, power, and image filtering latency.

Since I joined ITU, I have also been interested in analyzing the performance of a variety of small hardware devices. In general, I always look for good excuses for benchmarking hardware. :) Hence, DISCO was a fantastic excuse. We also had the perfect student to lead the work, Robert Bayer, who was a student assistant with me then and is now one of my PhD students.

1^st reject: The hardware benchmarking for DISCO started in Spring 2022. I thought it could be interesting to write up about the results and submit something to CIDR (Conference on Innovative Data Systems Research) 2023. CIDR values papers on interesting and challenging data systems, and in my opinion the image processing pipeline of DISCO fits into this category. The reviewers, however, didn’t agree with me on the data systems connection, so the paper got rejected. Two out of three reviewers had a positive tone, otherwise.

2^nd reject: After CIDR rejection, I thought the SIGMOD 2024 Data-Intensive Applications track could be a fit for this topic. This was also suggested by one of the positive CIDR reviewers. We added one more hardware device to our study, re-measured power consumption on all devices with a more precise external device, included details on the satellite components, and submitted the paper. Around the paper submission time, April 2023, the first DISCO satellite, built based on the results presented in the submitted paper, was launched in space. I thought this submission was the best paper I had ever co-authored in my entire career (no offense to the co-authors of my other papers), but no one else agreed. The paper got rejected once again mainly due to being a misfit for SIGMOD’s data management focus.

3^rd reject: After two trials with data management venues, I thought it is better to target a systems venue as also suggested by some of the reviewers who rejected the paper. Thus, we made minor adjustments to the paper based on the feedback from previous reviews and submitted it to ASPLOS 2024’s summer 2023 round. We got more detailed feedback, since no one thought the paper was a misfit to ASPLOS. However, overall, the reviewers found the results not novel and surprising enough for ASPLOS and the focus on a single application too narrow, even though they all appreciated the motivation of the work. Hence, the paper was rejected once again.

10 days after receiving this rejection, Robert won the best Computer Science MSc thesis award in Denmark for the same work.

4^th reject: When we received the 3^rd reject, the submission deadlines for MLSys 2024 and EuroSys 2024 were already over. They would have been other relevant systems venues for this work. The other option, which was also recommended by one of the CIDR reviewers, was MobiSys, but this was a whole different world for me, and I wasn’t sure if I wanted to jump into a third community while already doing a bad job juggling data management and systems communities. Therefore, I recommended Robert to target VLDB’s (International Conference on Very Large Databases) Scalable Data Science track. Based on the call for papers, both Robert and I thought the paper’s topic fits there. We were wrong once again. The paper got rejected mainly due to being unfit for VLDB.

Accept: This paper was tied to a real-world application deployment; the first DISCO satellite. Hence, there wasn’t much room to improve the work to please conference reviewers. We could do more benchmarking, but the satellite was already in space based on our existing results. The paper as is had closure and real-world impact. Thus, to avoid delaying the publication further, I once again gave up on conferences and started to think about relevant workshops. Robert also needed to move on. I thought the DEEM (Data Management for End-to-End Machine Learning) workshop, which I like very much, collocated with SIGMOD conference would be a nice venue for this work. I emailed the workshop chairs to double-check the suitability of the topic for the workshop to avoid another “this is unfit” rejection. They kindly confirmed that the topic is in scope for them. So, we submitted the paper to DEEM 2024, and it got accepted.

 

I personally enjoy and value some conference workshops more than the main conference. Workshops gather the subset of people in a research community with similar research interests. They can be way more effective for exposing your work to the right audience than the conference itself. Similarly, the talks at a workshop in your research area are usually more relevant for you content-wise. So, I am happy that my students had a chance to present their hard work at these workshops that I very highly regard.

However, a workshop publication unfortunately doesn’t count as much as a conference publication on one’s CV when people evaluate you for academic positions or grant submissions. A couple of years ago, a postdoc candidate I wished to hire mentioned that I didn’t seem to have so many publications recently. This wasn’t the main reason he declined my offer in the end, but it was something he noted down, and I am sure others do the same. This is how our profession works.

It has been more than 6 years since I joined ITU and almost 3 years since I had my first PhD student. I still don’t have a conference paper with my own PhD students. If ITU had a more traditional tenure-track scheme, I wouldn’t have gotten the tenure. Earlier this year, I went down the rabbit hole trying to figure out what I was doing wrong and what I can do better in the future. The list was too long, but none of the answers were soothing. Deeper into the hole I questioned whether I was a shit advisor or a complete failure at my job. Tori Amos’ Crucify played over and over in my head, especially the lines “Nothing I do is good enough for you, so I crucify myself every day.” and “got enough guilt to start my own religion.”

Luckily, Crucify ends with “Never going back again to crucify myself every day.”

I know I made mistakes and misjudgments and will likely keep making them. I know the struggle is partly due to changing my research field and trying to build up my own research group from scratch without any starting funding. I know systems work takes time to get published; 2 years or more is the common case. I know the 3-year PhD duration in Denmark freaks me out as a result and makes me more impatient than I should be for publications. I know everyone’s papers get rejected; even the works of the people I admire. I know one of my favorite conferences, CIDR, was founded by people whose work was underappreciated and rejected by VLDB and SIGMOD. I know I still get invited for talks, and when I present my team’s work to others, I get positive feedback overall, unless people are lying to my face. I know many colleagues at ITU appreciate me. Most importantly, I know, at my job, regardless of the rejections, I learn a lot and get the most fulfillment from the work I do with my students. 

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[1] Technically, I had a PhD student earlier through co-supervision. The co-supervision ended, and the student stayed with the other supervisor. That is why I count Ties as my first PhD student.