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My Journey Into CUDA

GPU Architecture, Tensor Cores, SIMD SIMT, Pinned Memory

A Great introduction video can be found here GPU (GA102) Architecture A graphics card’s brain is its GPU. NVidia’s Ampere GPU architecture family has GA102 and GA104. GA102 is shared across NVidi...

Posted by Rico's Nerd Cluster on August 15, 2023

Bash Magic

Bash is great. Here is a list of bash tricks & knowledge points that I found magical

Builtins Declare The declare builtin is used to explictly declare variables declare -r var is to declare a read-only variable 1 2 declare -r var="123" var="456" # see "var: readonly varia...

Posted by Rico's Nerd Cluster on June 15, 2023

C++ - [Memory Access - 1] Layout

Cache

Memory Access: The Hidden Bottleneck Reference Why Memory Access Matters Even as CPU speeds continue to improve, the cost of fetching data from memory has become a limiting factor. Operating sys...

Posted by Rico's Nerd Cluster on May 27, 2023

C++ Profiling and Speed Ups

gprof, CMake Release and Debug BoilerPlate, CMake Settings

Gprof GNU gprof provides CPU execution times (not wall time, so sleep is not accounted for) of functions and their subfunctions in percentage. Gprof outputs data in a text-based format, which can ...

Posted by Rico's Nerd Cluster on May 24, 2023

C++ - Writing GTest for ROS

Test! Test! Test!

Concepts Google Test (a.k.a GTest) is an open source unit testing structure. From the official website Test Suite vs Test Case: A test suite contains one or many tests. You should group your t...

Posted by Rico's Nerd Cluster on May 21, 2023

C++ - Writing GTest for ROS

Test! Test! Test!

Concepts Google Test (a.k.a GTest) is an open source unit testing structure. From the official website Test Suite vs Test Case: A test suite contains one or many tests. You should group your t...

Posted by Rico's Nerd Cluster on May 21, 2023

ROS - GDB

GDB for ROS, Core Dump

Introduction GDB is EXTREMELY handy. I used to doing a lot of print statements, but now I use GDB a lot. The reason is simple: I can check multiple things at once without recompiling everytime, es...

Posted by Rico's Nerd Cluster on May 20, 2023

C++ - Iterators

Basic Usage An iterator needs to be dereferenced *it or it->first so its internal data can be accessed. If you have an std::unordered_map<Key, Value> (or std::map<Key, Value>), its...

Posted by Rico's Nerd Cluster on March 6, 2023

C++ - [OOP] Members

Member Attributes and Methods, Copy, Move

Member Attributes Let’s take a look at a tricky example 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 #include <iostream>...

Posted by Rico's Nerd Cluster on March 6, 2023

C++ - [OOP] Polymorphism - Virtual Functions and Virtual Inheritance

Virtual is virtually complicated. Dynamic Dispatch, Dreadful Diamond Derivative (DDD) Problem ...

Introduction The virutal keyword is very versatile. A really short and nasty summary is, it is to ensure the correct functions or base class is inherited / loaded during runtime. Motivating Examp...

Posted by Rico's Nerd Cluster on March 3, 2023

Rico's Nerd Cluster

My Journey Into CUDA

GPU Architecture, Tensor Cores, SIMD SIMT, Pinned Memory

Bash Magic

Bash is great. Here is a list of bash tricks & knowledge points that I found magical

C++ - [Memory Access - 1] Layout

Cache

C++ Profiling and Speed Ups

gprof, CMake Release and Debug BoilerPlate, CMake Settings

C++ - Writing GTest for ROS

Test! Test! Test!

C++ - Writing GTest for ROS

Test! Test! Test!

ROS - GDB

GDB for ROS, Core Dump

C++ - Iterators

C++ - [OOP] Members

Member Attributes and Methods, Copy, Move

C++ - [OOP] Polymorphism - Virtual Functions and Virtual Inheritance

Virtual is virtually complicated. Dynamic Dispatch, Dreadful Diamond Derivative (DDD) Problem ...

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