cmisenas

cuid	alias	tags
human<% tp.file.creation_date("YYYYMMDD-HHmmss") %>	👤 <% tp.file.title.substring(1) %> <% tp.file.title.substring(1) %>	person/friends, person/family, person/coworker, person/rwc

👤 <% tp.file.title.substring(1) %>

🎂 Birthday: 💌 Email: ☎️ Phone:

cmisenas

In absolutely no order

• Insertion Evasion and Denial of Service: Eluding Network Intrusion Detection http://users.ece.cmu.edu/~adrian/731-sp04/readings/Ptacek-Newsham-ids98.pdf
• The Geometry of Innocent Flesh on the Bone: Return-into-libc without Function Calls (on the x86) https://hovav.net/ucsd/dist/geometry.pdf
• Smashing the Stack for Fun and Profit http://www-inst.eecs.berkeley.edu/~cs161/fa08/papers/stack_smashing.pdf
• Exploiting the DRAM rowhammer bug to gain kernel privileges https://googleprojectzero.blogspot.com/2015/03/exploiting-dram-rowhammer-bug-to-gain.html
• Understanding and Hardening Linux Containers https://www.nccgroup.trust/globalassets/our-research/us/whitepapers/2016/april/ncc_group_understanding_hardening_linux_containers-1-1.pdf
• Spectre Attacks: Exploiting Speculative Execution https://meltdownattack.com/spectre.pdf
• Dolphin Emulator Internals (PPC) https://www.alchemistowl.org/pocorgtfo/pocorgtfo06.pdf
• This World of Ours https://www.usenix.org/system/files/1401_08-12_micke

cmisenas

A collection of The Morning Paper posts relating to containers, operating systems etc.

In order of first appearance in The Morning Paper.

• On the duality of operating system structures
• Why threads are a bad idea
• Why events are a bad idea
• Unikernels: library operating systems for the cloud
• The scalable commutativity rule: designing scalable software for multicore processors
• Jitsu: just-in time summoning of unikernels

cmisenas

My solutions to Eudyptula challenges.

Tasks:

This is Task 01 of the Eudyptula Challenge

Write a Linux kernel module, and stand-alone Makefile, that when loaded prints to the kernel debug log level, "Hello World!" Be sure to make the module be able to be unloaded as well.

cmisenas

Latency Comparison Numbers
--------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

cmisenas

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

cmisenas

// When you create a new object
var obj = {data: "some data here"};

/* The JavaScript runtime environment allocates memory for you.
                                 __________________________
   Your computer's memory ----> ||  Location  ||   Value  ||
                                ||------------------------||
   It has to store that obj is  || 0          || 2424     ||
   an object, that it has a     || 1          || 1002     ||
   property named data, and     || 2          || 327871   ||

cmisenas

Programming Achievements: How to Level Up as a Developer

This gist is part of a blog post. Check it out at:

http://jasonrudolph.com/blog/2011/08/09/programming-achievements-how-to-level-up-as-a-developer

cmisenas

tmux cheat sheet

(C-x means ctrl+x, M-x means alt+x)

Prefix key

The default prefix is C-b. If you (or your muscle memory) prefer C-a, you need to add this to ~/.tmux.conf:

remap prefix to Control + a

cmisenas

Keybase proof

I hereby claim:

• I am cmisenas on github.
• I am jade (https://keybase.io/jade) on keybase.
• I have a public key whose fingerprint is 4271 D91A CD3B 2D14 B454 D14C 6FCA 71A4 4D6C 8472

To claim this, I am signing this object: