VirtualTam's bookmarks

1. LWN - What every programmer should know about memory 2023-07-22

   tags: hardware, hardware/cpu, hardware/ram, memory, memory/cache, performance

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   • What every programmer should know about memory (Full PDF version) Mirror
   • Part 1: Introduction & Commodity Hardware Today
   • Part 2: CPU Caches
   • Part 3: Virtual Memory
   • Part 4: NUMA support
   • Part 5: What programmers can do
   • How much of ‘What Every Programmer Should Know About Memory’ is still valid?
2. Writing a Linux Debugger 2021-10-10

   tags: debugging, hardware/ram, linux, programming/c++

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   • https://blog.tartanllama.xyz/writing-a-linux-debugger-setup/
   • https://github.com/TartanLlama/minidbg
3. 0.30000000000000004 2019-09-09

   tags: approximation, arithmetic, float, hardware/ram, memory, programming

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   • https://en.wikipedia.org/wiki/Floating-point_arithmetic
   • https://standards.ieee.org/standard/754-2008.html
   • https://stackoverflow.com/questions/588004/is-floating-point-math-broken/588014#588014
   • https://docs.oracle.com/cd/E19957-01/806-3568/ncg_goldberg.html
4. Redis - FAQ - Background saving fails with a fork() error under Linux even if I have a lot of free RAM! 2018-10-29

   tags: database/redis, hardware/ram, linux/container/docker, memory

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   • https://github.com/docker-library/redis/issues/159
   • https://gist.github.com/kapkaev/4619127
   • https://stackoverflow.com/questions/19581059/misconf-redis-is-configured-to-save-rdb-snapshots
   • https://stackoverflow.com/questions/42502636/unable-to-save-in-background-redis-server
   • https://people.redhat.com/nhorman/papers/rhel4_vm.pdf
5. "Don't run this on any system you expect to be up" they said, but we did it anyway - Byte Blog 2017-07-20

   tags: chroot, hardware/ram, linux, linux/ubuntu, live, upgrade

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   • https://github.com/marcan/takeover.sh
   • https://news.ycombinator.com/item?id=13622301
   • https://linux.die.net/man/8/debootstrap
   • https://linux.die.net/man/8/pivot_root
   • https://linux.die.net/man/2/pivot_root
6. Linux: Find Out What Process Are Using Swap Space 2016-12-17

   tags: hardware/ram, linux, memory, swap, virtualization/proxmox

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   "Sauf que y a tj un mec dans la boîte qui vient faire chier à demander un environnement Java (sous couvert de Big data tout ça...) je suis d'accord il faudrait le licencier immédiatement mais en attendant c'est la fête du Swap..."