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@itewqq
itewqq / vscode-for-linux-kernel.md
Created February 19, 2023 14:37
Configure vscode for linux kernel source code
  1. Disable or uninstall the official C/C++ plugin.
  2. Install the clangd plugin.
  3. Build the kernel with clang:
/path/to/kernel_source$ make CC=clang defconfig
/path/to/kernel_source$ make CC=clang -j16
  1. Generate the compile_commands.json:
/path/to/kernel_source$ python ./scripts/clang-tools/gen_compile_commands.py
@holmanb
holmanb / papers_posts.md
Last active January 28, 2022 17:20
Papers & Posts For Future Reference
@BuonOmo
BuonOmo / .gitconfig
Last active April 9, 2025 09:38
Git blame color scale from 20 month ago to now (https://stackoverflow.com/a/66250482/6320039)
[color "blame"]
highlightRecent = 234, 23 month ago, 235, 22 month ago, 236, 21 month ago, 237, 20 month ago, 238, 19 month ago, 239, 18 month ago, 240, 17 month ago, 241, 16 month ago, 242, 15 month ago, 243, 14 month ago, 244, 13 month ago, 245, 12 month ago, 246, 11 month ago, 247, 10 month ago, 248, 9 month ago, 249, 8 month ago, 250, 7 month ago, 251, 6 month ago, 252, 5 month ago, 253, 4 month ago, 254, 3 month ago, 231, 2 month ago, 230, 1 month ago, 229, 3 weeks ago, 228, 2 weeks ago, 227, 1 week ago, 226
[blame]
coloring = highlightRecent
date = human
@tweakoz
tweakoz / gist:a68407be79e3cea85c3cb0744c9d4505
Last active June 20, 2024 14:27
Mellanox IPOIB setup Debian/Ubuntu/Netplan/Systemd
################################
# install mlnxofed driver
################################
download: https://www.mellanox.com/products/infiniband-drivers/linux/mlnx_ofed
################################
# put HCA's in IPOIB mode
################################
mst start # start mellanox software tools
@wojteklu
wojteklu / clean_code.md
Last active August 4, 2025 13:29
Summary of 'Clean code' by Robert C. Martin

Code is clean if it can be understood easily – by everyone on the team. Clean code can be read and enhanced by a developer other than its original author. With understandability comes readability, changeability, extensibility and maintainability.

General rules

  1. Follow standard conventions.
  2. Keep it simple stupid. Simpler is always better. Reduce complexity as much as possible.
  3. Boy scout rule. Leave the campground cleaner than you found it.
  4. Always find root cause. Always look for the root cause of a problem.

Design rules

@scottslowe
scottslowe / arista-veos.xml
Created August 5, 2014 02:47
This libvirt domain XML can be used to create a KVM guest for running a virtualized instance of Arista EOS (vEOS).
<domain type='kvm'>
<name>veos</name>
<memory unit='KiB'>2097152</memory>
<currentMemory unit='KiB'>2097152</currentMemory>
<vcpu placement='static'>1</vcpu>
<resource>
<partition>/machine</partition>
</resource>
<os>
<type arch='x86_64' machine='pc-i440fx-1.5'>hvm</type>
@shamil
shamil / mount_qcow2.md
Last active August 3, 2025 20:23
How to mount a qcow2 disk image

How to mount a qcow2 disk image

This is a quick guide to mounting a qcow2 disk images on your host server. This is useful to reset passwords, edit files, or recover something without the virtual machine running.

Step 1 - Enable NBD on the Host

modprobe nbd max_part=8
@piscisaureus
piscisaureus / pr.md
Created August 13, 2012 16:12
Checkout github pull requests locally

Locate the section for your github remote in the .git/config file. It looks like this:

[remote "origin"]
	fetch = +refs/heads/*:refs/remotes/origin/*
	url = [email protected]:joyent/node.git

Now add the line fetch = +refs/pull/*/head:refs/remotes/origin/pr/* to this section. Obviously, change the github url to match your project's URL. It ends up looking like this:

@jboner
jboner / latency.txt
Last active August 4, 2025 19:20
Latency Numbers Every Programmer Should Know
Latency Comparison Numbers (~2012)
----------------------------------
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
@austinmarton
austinmarton / sendRawEth.c
Created February 27, 2012 08:40
Send a raw Ethernet frame in Linux
/*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*/
#include <arpa/inet.h>
#include <linux/if_packet.h>
#include <stdio.h>