felipeek

Approach 1: run a process with massif, let it take automatic memory snapshots and then analyze the results

Approach 2: run a process with massif, manually decide when the snapshots are taken, and then analyze the results

Approach 1

• 1. Run your process with massif: valgrind --tool=massif <your executable> <your process arguments>
• 2. Do whatever you need to do, and then stop your process. A file named ms_print massif.out.pid will be generated.
• 3a. Option 1: Run ms_print massif.out.*pid* > user_friendly.txt to generate a user-friendly file and analyze it.
• 3b. Option 2: Run massif-visualizer massif.out.*pid* to visualize the results in a pretty UI. You need to install massif-visualizer: sudo apt install massif-visualizer

felipeek

// checks whether a point lies on a line (2D)
// l1_x, l1_y -> line's first point
// l2_x, l2_y -> line's second point
// p_x, p_y -> point of interest
// w -> output indicating the weight of the point
// returns 1 if point lies on the line, 0 if not
// https://gist.github.com/felipeek/93c873395506868e50ea6f2323eb3399
int point_lies_on_line_2d(float l1_x, float l1_y, float l2_x, float l2_y, float p_x, float p_y, float* w) {
	const float EPSILON = 0.000001f;
	int vertical_line = (l1_x - l2_x) > -EPSILON && (l1_x - l2_x) < EPSILON; // vertical line

felipeek

Assumptions: Host machine is linux.

1. Download virtualbox
2. Install a linux flavour. Preference for Debian since distro-dependent commands in the following steps will be debian-dependent
3. Run your VM.
4. Inside VM, download last kernel code from kernel.org
5. Extract linux src code
6. Copy your configuration file from /boot/config-$(uname -r) to .config in the extract linux src code folder.
7. Make sure .config has the following options: CONFIG_FRAME_POINTER=y , CONFIG_KGDB=y , CONFIG_KGDB_SERIAL_CONSOLE=y , CONFIG_KGDB_KDB=y , CONFIG_KDB_KEYBOARD=y. Change if necessary. Alternatively use make xconfig to configure in UI.
8. Install compilation dependencies (debian: sudo apt-get install build-essential libncurses-dev bison flex libssl-dev libelf-dev)

felipeek

<?xml version="1.0" encoding="utf-8"?>
<COLLADA xmlns="http://www.collada.org/2005/11/COLLADASchema" version="1.4.1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <asset>
    <contributor>
      <author>Blender User</author>
      <authoring_tool>Blender 2.80.75 commit date:2019-07-29, commit time:14:47, hash:f6cb5f54494e</authoring_tool>
    </contributor>
    <created>2019-12-23T00:22:22</created>
    <modified>2019-12-23T00:22:22</modified>
    <unit name="meter" meter="1"/>

felipeek

#!/bin/bash

git remote set-url origin https://github.com/felipeek/squiggly.git
git remote add bitbucket https://Felipeek@bitbucket.org/Felipeek/squiggly.git

# From now on...
# git push origin ~> Updates GITHUB
# git push bitbucket ~> Updates BITBUCKET (if needed for some reason)