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#fragmentation

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Felix Palmen :freebsd: :c64:

Trying to further improve #swad, and as I'm still unhappy with the amount of memory needed ....

Well, this little and special custom #allocator (only dealing with equally sized objects on a single thread and actively preventing #fragmentation) reduces the resident set in my tests by 5 to 10 MiB, compared to "pooling" with linked lists in whatever #FreeBSD's #jemalloc serves me. At least something. 🙈

github.com/Zirias/poser/blob/m

The resident set now stabilizes at 79MiB after many runs of my somewhat heavy jmeter test simulating 1000 distinct clients.

GitHubposer/src/lib/core/objectpool.c at master · Zirias/poserPOsix SERvices framework for C. Contribute to Zirias/poser development by creating an account on GitHub.
Thomas Barrio

Le cercle vicieux du pouvoir simulacre : hyperréalité étatique, dépossession et atomisation sociale

Entre #hyperréalité étatique (#Baudrillard, #Debord, #Foucault, #Derrida, #Agamben, #Clastres) et #dépossession des dominés (#Stiegler, #Weil, #Fromm), un #cercleVicieux s’installe : l’#atomisationSociale (#Arendt) fragmente les liens, rendant la #résistanceCollective quasi impossible, sous l’effet d’une #violenceSymbolique (#Ahmed, #Bourdieu). #simulacre #fragmentation…

homohortus31.wordpress.com/202

Homo Hortus · Le cercle vicieux du pouvoir simulacre : hyperréalité étatique, dépossession et atomisation socialeEntre #hyperréalité étatique (#Baudrillard, #Debord, #Foucault, #Derrida, #Agamben, #Clastres) et #dépossession des dominés (#Stiegler, #Weil, #Fromm), un #cercleVicieux s’installe : l’#atomisation…
Felix Palmen :freebsd: :c64:

I just stress-tested the current dev state of #swad on #Linux. The first attempt failed miserably, got a lot of errors accepting a connection. Well, this lead to another little improvement, I added another static method to my logging interface that mimics #perror: Also print the description of the system errno. With that in place, I could see the issue was "too many open files". Checking #ulimit -n gave me 1024. Seriously? 🤯 On my #FreeBSD machine, as a regular user, it's 226755. Ok, bumped that up to 8192 and then the stress test ran through without issues.

On a side note, this also made creating new timers (using #timerfd on Linux) fail, which ultimately made swad crash. I have to redesign my timer interface so that creating a timer may explicitly fail and I can react on that, aborting whatever would need that timer.

Anyways, the same test gave somewhat acceptable results: throughput of roughly 3000 req/s, response times around 500ms. Not great, but okayish, and not directly comparable because this test ran in a #bhyve vm and the requests had to pass the virtual networking.

One major issue is still the #RAM consumption. The test left swad with a resident set of > 540 MiB. I have no idea what to do about that. 😞 The code makes heavy use of "allocated objects" (every connection object with metadata and buffers, every event handler registered, every timer, and so on), so, uses the #heap a lot, but according to #valgrind, correctly frees everything. Still the resident set just keeps growing. I guess it's the classic #fragmentation issue...

Stéphane Bortzmeyer

RFC 9715: IP Fragmentation Avoidance in DNS over UDP

Les requêtes et réponses #DNS peuvent voyager sur divers transports, mais le plus fréquent est UDP. Une réponse de grande taille sur UDP peut dépasser la MTU et donc devoir être fragmentée. La #fragmentation crée divers problèmes et ce RFC décrit les problèmes, et comment éviter la fragmentation.

bortzmeyer.org/9715.html

www.bortzmeyer.orgBlog Stéphane Bortzmeyer: RFC 9715: IP Fragmentation Avoidance in DNS over UDP
Internet Society

"Asking #TikTok, #Google, and #Apple to more intrusively track nearly every American with a cell phone, based on the possibility that a TikTok user might enter #Montana would be a significant invasion of privacy."

Today we filed an amicus brief with the US 9th District Court of Appeals explaining our view on how Montana's TikTok ban will lead to #Internet #fragmentation how it won't work technically, and how it will be bad for the people of Montana and USA. Read more:

internetsociety.org/blog/2024/

Internet Society · Montana's TikTok Ban: Breaking the Internet and Undermining Online Privacy  - Internet SocietyWe filed an Amicus brief on Montana's decision to ban TikTok which could negatively impact the Internet and diminish our online privacy.
bikejourno

While the #fragmentation of political parties complicates the formation of a government in the #Netherlands a lot, it also is a welcome safeguard when a nasty demagogue appealing to #islamophobia and #xenophobia like #GeertWilders and his #PVV end up as the strongest party.
Mind you: this was in NO way a "landslide" victory or a breakthrough. They won 35 of 150 seats in the Tweede Kamer. And most large cities are firmly in the hands of #GroenLinksPvdA. So nothing is a given, really. #elections

Gladwyn d’Souza

The main reason behind the decline of #orangutan populations is #habitatdestruction and #fragmentation due to #illegallogging, #agriculture, and #palmoil #plantations.
#BoycottPalmOil #SiblingBeings #IndigenousBiodiversity #WebOfLife #DeterioratingCarbonSinks
themeghalayan.com/in-the-shado

The Meghalayan · In the Shadows of Extinction: OrangutansOur distant cousin, the orangutan, has been listed as “Critically Endangered” in the IUCN list. On International Orangutan Day, celebrated on August 19 every year, Assaf Levy explores their ecological significance and the dangers that threaten their continued presence as graceful arboreal beings, including the ways in which sustained conservation efforts is a collective effort.
Gabriele Pollara

Good article about demise of #twitter / #X for #academia.

I'm happy to admit pre-Musk Twitter was broadly useful and engaging, but quality of the platform has suffered since.

Sad thing is that for now, the resulting #fragmentation will benefit no one.

Hopefully people disperse to various #ActivityPub connected services, such as #Mastodon or even #Threads. In the end we're a #community, and talking to each other should be facilated. #academicchatter @academicchatter

nature.com/articles/d41586-023

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