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Ruslan Kovalev velavokr

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# setting up irq affinity according to /proc/interrupts
# 2008-11-25 Robert Olsson
# 2009-02-19 updated by Jesse Brandeburg
#
# > Dave Miller:
# (To get consistent naming in /proc/interrups)
# I would suggest that people use something like:
# char buf[IFNAMSIZ+6];
#
# sprintf(buf, "%s-%s-%d",
@wmealing
wmealing / nmi-interrupts.txt
Created May 6, 2013 03:45
NMI interrupts and the joy they bring.
A non-maskable interrupt (NMI) is an interrupt type which differs from standard interrupt mechanism by enforcing attention from the interrupt processor (usually the CPU). This solution discusses an NMI is in more depth and how they are handled.
### What is an Interrupt ? ###
Modern systems architecture has created tightly coupled connect between system components. Work for components can be handed off to a component for completion. Rather than wait for the component the main CPU can be tasked to do other pending work.
When the component has completed its work it will raise a signal to the main processor. The main processor considers this signal an "interrupt", as the current work on the CPU will be interrupted immediately Each component has a number assigned to it.
### Why "mask" an interrupt ? ###
@debasishg
debasishg / gist:8172796
Last active May 10, 2024 13:37
A collection of links for streaming algorithms and data structures

General Background and Overview

  1. Probabilistic Data Structures for Web Analytics and Data Mining : A great overview of the space of probabilistic data structures and how they are used in approximation algorithm implementation.
  2. Models and Issues in Data Stream Systems
  3. Philippe Flajolet’s contribution to streaming algorithms : A presentation by Jérémie Lumbroso that visits some of the hostorical perspectives and how it all began with Flajolet
  4. Approximate Frequency Counts over Data Streams by Gurmeet Singh Manku & Rajeev Motwani : One of the early papers on the subject.
  5. [Methods for Finding Frequent Items in Data Streams](http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.187.9800&rep=rep1&t
@fsodogandji
fsodogandji / socat-tips.sh
Last active April 11, 2024 18:47
socat tips & tricks
#To create a classic TCP listening daemon, similar to netcat -l, use a variation of the following command.
socat TCP-LISTEN:8080 stdout
#use remotly a command shell
socat TCP4-LISTEN:1234,reuseaddr,fork 'SYSTEM:/bin/cat /home/infos.txt'
#sslify a server
socat OPENSSL-LISTEN:443,reuse‐addr,pf=ip4,fork,cert=server.pem,cafile=client.crt TCP4-CONNECT:localhost:80
@soarez
soarez / ca.md
Last active May 28, 2024 02:57
How to setup your own CA with OpenSSL

How to setup your own CA with OpenSSL

For educational reasons I've decided to create my own CA. Here is what I learned.

First things first

Lets get some context first.

@myusuf3
myusuf3 / delete_git_submodule.md
Created November 3, 2014 17:36
How effectively delete a git submodule.

To remove a submodule you need to:

  • Delete the relevant section from the .gitmodules file.
  • Stage the .gitmodules changes git add .gitmodules
  • Delete the relevant section from .git/config.
  • Run git rm --cached path_to_submodule (no trailing slash).
  • Run rm -rf .git/modules/path_to_submodule (no trailing slash).
  • Commit git commit -m "Removed submodule "
  • Delete the now untracked submodule files rm -rf path_to_submodule
@martinmoene
martinmoene / value-semantics-sean-parent.cpp
Created August 18, 2015 15:07
Code from talk: Inheritance Is The Base Class of Evil by Sean Parent at Going Native 2013
// Sean Parent. Inheritance Is The Base Class of Evil. Going Native 2013
// Video: https://www.youtube.com/watch?v=bIhUE5uUFOA
// Code : https://github.com/sean-parent/sean-parent.github.io/wiki/Papers-and-Presentations
/*
Copyright 2013 Adobe Systems Incorporated
Distributed under the MIT License (see license at
http://stlab.adobe.com/licenses.html)
This file is intended as example code and is not production quality.
@brendangregg
brendangregg / chaintest.py
Last active May 26, 2023 09:55
chaintest
#!/usr/bin/python
#
# chaintest Summarize off-CPU time by kernel stack + 2 waker stacks
# WORK IN PROGRESS. For Linux, uses BCC, eBPF.
#
# USAGE: chaintest [-h] [-u] [-p PID] [-i INTERVAL] [-T] [duration]
#
# PLEASE DO NOT RUN THIS IN PRODUCTION! This is a work in progress, intended to
# explore chain graphs on Linux, using eBPF capabilities from a particular
# kernel version (4.3ish). This tool will eventually get much better.
@shagunsodhani
shagunsodhani / Batch Normalization.md
Last active July 25, 2023 18:07
Notes for "Batch Normalization: Accelerating Deep Network Training by Reducing Internal Covariate Shift" paper

The Batch Normalization paper describes a method to address the various issues related to training of Deep Neural Networks. It makes normalization a part of the architecture itself and reports significant improvements in terms of the number of iterations required to train the network.

Issues With Training Deep Neural Networks

Internal Covariate shift

Covariate shift refers to the change in the input distribution to a learning system. In the case of deep networks, the input to each layer is affected by parameters in all the input layers. So even small changes to the network get amplified down the network. This leads to change in the input distribution to internal layers of the deep network and is known as internal covariate shift.

It is well established that networks converge faster if the inputs have been whitened (ie zero mean, unit variances) and are uncorrelated and internal covariate shift leads to just the opposite.