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#lowlevel — Public Fediverse posts

Live and recent posts from across the Fediverse tagged #lowlevel, aggregated by home.social.

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  1. Ещё раз о статистике (где живёт статистика Oracle)

    Эта статья предназначена для технических специалистов, работающих с Oracle: администраторов баз данных, инженеров производительности, разработчиков инструментов мониторинга и исследователей внутренних механизмов СУБД. Это готовый пример низкоуровневого исследования, который можно адаптировать под собственные задачи. Мы покажем, как связать привычные SQL‑данные из v$sesstat с их реальным расположением в памяти процесса, и на конкретном примере проиллюстрируем методику, применимую и к другим внутренним структурам Oracle. Это первая статья из серии, она посвящена Oracle 11g, довольно древней версии Oracle, далее мы увидим как изменялся подход корпорации Oracle к хранению внутренних структур статистики.

    habr.com/ru/companies/gnivc/ar

    #gdb #internals #lowlevel #oracle_11g #oracle #базы_данных #бд #database #субд

  2. Sidewinder Thursday Way Point A-B: The Hunt. Its quiet, you begin to hear the roar of military turbines, the scanner is quiet, you grab your gear for the 50th time in an hour and search hoping it is not a false alarm. You spot it, lose it, spot it lose, heart pounding you finally lock on and let loose a long burst, your heart still racing you turn back in case there is another one. Then the with the excitement over, you begin to wait again #cvvhrn #AvGee #photography #R2508 #lowlevel #sidewinder #video #VFC13 #F16

  3. Sidewinder Thursday Way Point A-B: The Hunt. Its quiet, you begin to hear the roar of military turbines, the scanner is quiet, you grab your gear for the 50th time in an hour and search hoping it is not a false alarm. You spot it, lose it, spot it lose, heart pounding you finally lock on and let loose a long burst, your heart still racing you turn back in case there is another one. Then the with the excitement over, you begin to wait again #cvvhrn #AvGee #photography #R2508 #lowlevel #sidewinder #video #VFC13 #F16

  4. Sidewinder Thursday Way Point C-J The Force will be with you Always: Remembering Star Wars Canyon and the Jedi Transition RCAF in tha house CC-130J 130602 July 2018. #USAF #StarWars #JediTransition #cvvhrn #AvGeek #RCAF #CC130J #photography #R2508 #lowlevel #sidewinder

  5. Sidewinder Thursday Way Point C-J The Force will be with you Always: Remembering Star Wars Canyon and the Jedi Transition RCAF in tha house CC-130J 130602 July 2018. #USAF #StarWars #JediTransition #cvvhrn #AvGeek #RCAF #CC130J #photography #R2508 #lowlevel #sidewinder

  6. Sidewinder Thursday Way Point C-J The Force will be with you Always: Remembering Star Wars Canyon and the Jedi Transition USAF F-22A Raptor 04-0120 of the 422nd Test and Evaluation Squadron, July 2018. #USAF #StarWars #JediTransition #cvvhrn #AvGeek #OT #aviationphotography #photography #R2508 #lowlevel #sidewinder

  7. Sidewinder Thursday Way Point C-J The Force will be with you Always: Remembering Star Wars Canyon and the Jedi Transition USAF F-22A Raptor 04-0120 of the 422nd Test and Evaluation Squadron, July 2018. #USAF #StarWars #JediTransition #cvvhrn #AvGeek #OT #aviationphotography #photography #R2508 #lowlevel #sidewinder

  8. Sidewinder Thursday Way Point C-J The Force will be with you Always: Remembering Star Wars Canyon and the Jedi Transition #USAF F-35A 17-5074, 422nd TES, Nellis AFB brings the heat #StarWars #JediTransition #cvvhrn #aviationphotography #AvGeek #photography #R2508 #lowlevel #sidewinder

  9. Sidewinder Thursday Way Point C-J The Force will be with you Always: Remembering Star Wars Canyon and the Jedi Transition #USAF F-35A 17-5074, 422nd TES, Nellis AFB brings the heat #StarWars #JediTransition #cvvhrn #aviationphotography #AvGeek #photography #R2508 #lowlevel #sidewinder

  10. Sidewinder Thursday Way Point C-J The Force will be with you Always: Remembering Star Wars Canyon and the Jedi Transition USN F/A18F 166926,, VFA-94 “Mighty Shrikes,” Carrier Air Wing 17 #StarWars #JediTransition #aviationphotography #planespotting #AvGeek #spotter #photography #Nikon #cvvhrn #nikonphotography #R2508 #lowlevel #lowleveljets #sidewinder #USNavy

  11. Sidewinder Thursday Way Point C-J The Force will be with you Always: Remembering Star Wars Canyon and the Jedi Transition USN F/A18F 166926,, VFA-94 “Mighty Shrikes,” Carrier Air Wing 17 #StarWars #JediTransition #aviationphotography #planespotting #AvGeek #spotter #photography #Nikon #cvvhrn #nikonphotography #R2508 #lowlevel #lowleveljets #sidewinder #USNavy

  12. Sidewinder Thursday Way Point J-K: aka park in the right spot, die in a simulated attack USN F/A-18F 166464, of VFA-122 “Flying Eagles dives on my car in a simulated attack #aviationphotography #planespotting #AvGeek #spotter #photography #Nikon #cvvhrn #nikonphotography #R2508 #lowlevel #lowleveljets #sidewinder

  13. Sidewinder Thursday Way Point J-K: aka park in the right spot, die in a simulated attack USN F/A-18F 166464, of VFA-122 “Flying Eagles dives on my car in a simulated attack #aviationphotography #planespotting #AvGeek #spotter #photography #Nikon #cvvhrn #nikonphotography #R2508 #lowlevel #lowleveljets #sidewinder

  14. It may not always be pretty but the show and tracking low flying aircraft though a bush must go on

    United States Navy F-16C VFC-13 "Fighting Saints" in the R-2508 Sidewinder Low Level Complex, May, 2026 #f16 #F16C #VFC13 #R2508 #fightingSaints #nikon #AvGeek #aviationphotography #photography #Sidewinder #cvvhrn #lowlevel #afterburner

  15. It may not always be pretty but the show and tracking low flying aircraft though a bush must go on

    United States Navy F-16C VFC-13 "Fighting Saints" in the R-2508 Sidewinder Low Level Complex, May, 2026 #f16 #F16C #VFC13 #R2508 #fightingSaints #nikon #AvGeek #aviationphotography #photography #Sidewinder #cvvhrn #lowlevel #afterburner

  16. For my #bootloader in #rust I wanted an different approach than grub; instead of probing at boot-time, a userspace tool creates an load config (or the user specifies one) which is then baked into the bootloader itself when booting from BIOS.

    The sysfs has some interesting quirks! Each device has a folder for related devices, both which they are contained in (slaves) and which they contain (holders). Would named them the opposite, but hey; thats just how the linux sysfs works I guess.

    Another is that partitions do have a "slaves" folder but dont use them; you're supposed to just use the parent directory. Except if the partition was discovered via disk mappers (kpartx) - then the parent device does show up in the "slaves" folder!

    #lowlevel #rustboot #coding #osdev #programming #linux

  17. USAF F-16C 86-0305 in splinter camo 64th Aggressor Squadron "Gomers", Nellis AFB running the R-2508 Sidewinder Low Level Complex, May 29th 2026 #F16C #USAF #aggressor #Sidewinder #NellisAFB #milair #planespotting #AvGeek #spotter #photography #Nikon #cvvhrn #R2508 #lowlevel #lowleveljets #WA

  18. USAF F-16C 86-0305 in splinter camo 64th Aggressor Squadron "Gomers", Nellis AFB running the R-2508 Sidewinder Low Level Complex, May 29th 2026 #F16C #USAF #aggressor #Sidewinder #NellisAFB #milair #planespotting #AvGeek #spotter #photography #Nikon #cvvhrn #R2508 #lowlevel #lowleveljets #WA

  19. USN F/A-18E 170313 of VFA-146 “Blue Diamonds” F/A-18E, CVW-17 (USS Nimitz CVN-68) and NAS Lemoore running the running the R-2508 Sidewinder Low Level Complex, May 29th 2026 #Sidewinder #NellisAFB #milair #planespotting #AvGeek #spotter #photography #Nikon #cvvhrn #R2508 #lowlevel #lowleveljets #VFA146

  20. USN F/A-18E 170313 of VFA-146 “Blue Diamonds” F/A-18E, CVW-17 (USS Nimitz CVN-68) and NAS Lemoore running the running the R-2508 Sidewinder Low Level Complex, May 29th 2026 #Sidewinder #NellisAFB #milair #planespotting #AvGeek #spotter #photography #Nikon #cvvhrn #R2508 #lowlevel #lowleveljets #VFA146

  21. Hello People.

    This is my first fediverse post, featuring my first #assembly64 program in #linux. I am a #student who is just getting into #cybersecurity and love contributing to #infosec, #lowlevel stuffs and #linuxkernel.

    I love to program in #c, and use #archlinux btw. Looking for people to connect. I installed LinkedIn a few days ago for connecting with people and figured out that it was a #scam in jobmarket, just data feed into companies. (No offense, just in my opinion).

    I was suggested to start learning #assembly64 by a random reddit user when I asked some questions about #c programming and how to get better at it. Currently learning #syscalls in linux, and I guess assembly programming alongside with c programming is helpful - I can understand syscalls and registers (for some extent).

    Looking forward for friends to connect. Follow me and I will follow you back - provided that we have same or similar interests. I am also interested in #russian arts, languages and techs - I am not a Russian btw.

    I need suggestions \ #help on how to get started in fediverse, cybersecurity and low level stuffs. You can see my profile for more information.

    #introduction #introductions #programming

  22. Hello People.

    This is my first fediverse post, featuring my first #assembly64 program in #linux. I am a #student who is just getting into #cybersecurity and love contributing to #infosec, #lowlevel stuffs and #linuxkernel.

    I love to program in #c, and use #archlinux btw. Looking for people to connect. I installed LinkedIn a few days ago for connecting with people and figured out that it was a #scam in jobmarket, just data feed into companies. (No offense, just in my opinion).

    I was suggested to start learning #assembly64 by a random reddit user when I asked some questions about #c programming and how to get better at it. Currently learning #syscalls in linux, and I guess assembly programming alongside with c programming is helpful - I can understand syscalls and registers (for some extent).

    Looking forward for friends to connect. Follow me and I will follow you back - provided that we have same or similar interests. I am also interested in #russian arts, languages and techs - I am not a Russian btw.

    I need suggestions \ #help on how to get started in fediverse, cybersecurity and low level stuffs. You can see my profile for more information.

    #introduction #introductions #programming

  23. 🤖💻 Frame: Un nou server grafic X11 pentru Linux scris în întregime în Assembly

    Într-o epocă în care industria Linux migrează masiv către Wayland și dezvoltă software complex în limbaje moderne, un proiect incredibil vine să zguduie status quo-ul prin tehnica pură: Frame. Acesta este un server grafic compatibil X11, scris de la zero în întregime în Assembly (ASM).

    Proiectul reprezintă un tur de forță ingineresc, demonstrând ce se poate obține atunci când elimini complet straturile intermediare de cod, compilatoarele greoaie și dependințele masive, vorbind direct pe limba procesorului.

    Iată caracteristicile uluitoare ale acestui proiect minimalist:

    🔹 Performanță brută și latență zero
    Deoarece codul este scris direct în Assembly, Frame ocolește toate optimizările (sau limitările) pe care un compilator de C sau C++ le-ar impune.

    Latență minimă: Timpul de răspuns între input-ul utilizatorului (mouse/tastatură) și randarea pe ecran este redus la minimul absolut permis de hardware.

    Fără supraîncărcare (Zero Overhead): Serverul nu încarcă biblioteci externe gigantice, scăzând drastic numărul de instrucțiuni executate de procesor pentru fiecare cadru (frame) randat.

    🔹 Dimensiune microscopică a binarului
    Spre deosebire de serverul clasic Xorg, care are nevoie de zeci sau sute de megabiți de biblioteci și dependențe pentru a funcționa, binarul executabil al Frame ocupă doar câțiva kilobiți. Întregul server grafic poate fi stocat pe o veche dischetă, fiind probabil cel mai mic server de afișare funcțional creat vreodată pentru Linux.

    🔹 Compatibilitate cu protocolul X11
    În ciuda naturii sale experimentale și a limbajului de nivel jos în care este scris, Frame implementează elementele de bază ale protocolului X11. Acest lucru înseamnă că poate, teoretic, să comunice cu clienți X standard, permițând rularea aplicațiilor grafice de bază din ecosistemul Linux direct pe această fundație ultra-ușoară.

    🔹 Eficiență extremă a resurselor
    Consumul de memorie RAM al serverului se măsoară în câțiva megabiți (sau chiar mai puțin în modul idle), făcându-l o opțiune fascinantă pentru:

    Sisteme integrate (Embedded): Dispozitive cu resurse hardware extrem de limitate, unde fiecare octet de RAM contează.

    Sisteme de restaurare și recuperare: Medii de boot minimale care au nevoie de o interfață grafică rapidă, fără a încărca RAM-disk-ul.

    Frame este un proiect manifest dedicat programării retro-futuriste, o dovadă vie că optimizarea extremă nu a murit și că bătrânul protocol X11 poate fi reinventat în cel mai pur mod cu putință.

    #OpenSource #FrameServer #Assembly #X11 #LinuxGraphics #BareMetal #LowLevel #Minimalism #TechNews #Linuxiac

  24. 🤖💻 Frame: Un nou server grafic X11 pentru Linux scris în întregime în Assembly

    Într-o epocă în care industria Linux migrează masiv către Wayland și dezvoltă software complex în limbaje moderne, un proiect incredibil vine să zguduie status quo-ul prin tehnica pură: Frame. Acesta este un server grafic compatibil X11, scris de la zero în întregime în Assembly (ASM).

    Proiectul reprezintă un tur de forță ingineresc, demonstrând ce se poate obține atunci când elimini complet straturile intermediare de cod, compilatoarele greoaie și dependințele masive, vorbind direct pe limba procesorului.

    Iată caracteristicile uluitoare ale acestui proiect minimalist:

    🔹 Performanță brută și latență zero
    Deoarece codul este scris direct în Assembly, Frame ocolește toate optimizările (sau limitările) pe care un compilator de C sau C++ le-ar impune.

    Latență minimă: Timpul de răspuns între input-ul utilizatorului (mouse/tastatură) și randarea pe ecran este redus la minimul absolut permis de hardware.

    Fără supraîncărcare (Zero Overhead): Serverul nu încarcă biblioteci externe gigantice, scăzând drastic numărul de instrucțiuni executate de procesor pentru fiecare cadru (frame) randat.

    🔹 Dimensiune microscopică a binarului
    Spre deosebire de serverul clasic Xorg, care are nevoie de zeci sau sute de megabiți de biblioteci și dependențe pentru a funcționa, binarul executabil al Frame ocupă doar câțiva kilobiți. Întregul server grafic poate fi stocat pe o veche dischetă, fiind probabil cel mai mic server de afișare funcțional creat vreodată pentru Linux.

    🔹 Compatibilitate cu protocolul X11
    În ciuda naturii sale experimentale și a limbajului de nivel jos în care este scris, Frame implementează elementele de bază ale protocolului X11. Acest lucru înseamnă că poate, teoretic, să comunice cu clienți X standard, permițând rularea aplicațiilor grafice de bază din ecosistemul Linux direct pe această fundație ultra-ușoară.

    🔹 Eficiență extremă a resurselor
    Consumul de memorie RAM al serverului se măsoară în câțiva megabiți (sau chiar mai puțin în modul idle), făcându-l o opțiune fascinantă pentru:

    Sisteme integrate (Embedded): Dispozitive cu resurse hardware extrem de limitate, unde fiecare octet de RAM contează.

    Sisteme de restaurare și recuperare: Medii de boot minimale care au nevoie de o interfață grafică rapidă, fără a încărca RAM-disk-ul.

    Frame este un proiect manifest dedicat programării retro-futuriste, o dovadă vie că optimizarea extremă nu a murit și că bătrânul protocol X11 poate fi reinventat în cel mai pur mod cu putință.

    #OpenSource #FrameServer #Assembly #X11 #LinuxGraphics #BareMetal #LowLevel #Minimalism #TechNews #Linuxiac

  25. The waiting is the hardest part
    Every day you get one more yard
    You take it on faith, you take it to the heart
    The waiting is the hardest part
    Yeah, the waiting is the hardest part - The Waiting, Tom Petty

    Yes its raining int he #Sidewinder #R2508 #nikon #AvGeek #cvvhrn #lowlevel

  26. The waiting is the hardest part
    Every day you get one more yard
    You take it on faith, you take it to the heart
    The waiting is the hardest part
    Yeah, the waiting is the hardest part - The Waiting, Tom Petty

    Yes its raining int he #Sidewinder #R2508 #nikon #AvGeek #cvvhrn #lowlevel

  27. United States Navy F-16C VFC-13 "Fighting Saints" brings the heat in the R-2508 Sidewinder Low Level Complex, May 2026 #f16 #F16C #VFC13 #R2508 #milair #fightingSaints #nikon#aviationphotography #photography #Sidewinder #AvGeek #cvvhrn #lowlevel #afterburner

  28. United States Navy F-16C VFC-13 "Fighting Saints" brings the heat in the R-2508 Sidewinder Low Level Complex, May 2026 #f16 #F16C #VFC13 #R2508 #milair #fightingSaints #nikon#aviationphotography #photography #Sidewinder #AvGeek #cvvhrn #lowlevel #afterburner

  29. USN F/A-18E VFA-146 “Blue Diamonds” F/A-18E, CVW-17 (USS Nimitz CVN-68) and NAS Lemoore running the running the R-2508 Sidewinder Low Level Complex, May 29th 2026 #Sidewinder #NellisAFB #milair #planespotting #AvGeek #spotter #photography #Nikon #cvvhrn #R2508 #lowlevel #lowleveljets #VFA146

  30. USN F/A-18E VFA-146 “Blue Diamonds” F/A-18E, CVW-17 (USS Nimitz CVN-68) and NAS Lemoore running the running the R-2508 Sidewinder Low Level Complex, May 29th 2026 #Sidewinder #NellisAFB #milair #planespotting #AvGeek #spotter #photography #Nikon #cvvhrn #R2508 #lowlevel #lowleveljets #VFA146

  31. USN F/A-18F of VX-31 "Dust Devils" NAWS China Lake rolls inverted before under a ridge downrange from my position in the R-2508 Sidewinder Low Level Complex, June 2, 2026 #Sidewinder #ChinaLake #VX31 #DustDevils #FA18 #AvGeek #photography #Nikon #cvvhrn #R2508 #lowlevel #lowleveljets

  32. USN F/A-18F of VX-31 "Dust Devils" NAWS China Lake rolls inverted before under a ridge downrange from my position in the R-2508 Sidewinder Low Level Complex, June 2, 2026 #Sidewinder #ChinaLake #VX31 #DustDevils #FA18 #AvGeek #photography #Nikon #cvvhrn #R2508 #lowlevel #lowleveljets

  33. USN F/A-18E VFA-146 “Blue Diamonds” F/A-18E, CVW-17 (USS Nimitz CVN-68) and NAS Lemoore running the running the R-2508 Sidewinder Low Level Complex, May 29th 2026 #Sidewinder #NellisAFB #milair #planespotting #AvGeek #spotter #photography #Nikon #cvvhrn #R2508 #lowlevel #lowleveljets #VFA146

  34. USN F/A-18E VFA-146 “Blue Diamonds” F/A-18E, CVW-17 (USS Nimitz CVN-68) and NAS Lemoore running the running the R-2508 Sidewinder Low Level Complex, May 29th 2026 #Sidewinder #NellisAFB #milair #planespotting #AvGeek #spotter #photography #Nikon #cvvhrn #R2508 #lowlevel #lowleveljets #VFA146