MuTIO

Windows File I/O Performance Simulation with Multithreading
It is tested on Windows 10, Visual Studio 19, C++17
Concurrency Visualizer for Visual Studio 2019 SDK is used to check performance

If you want more information go to the Wiki

Make dummy files before simulation

Need dummy files for simulation. You can make it with my project, DummyFileGenerator.

Arguments

• NUM_THREADS is number of threads for IOThreadPool class. The threads work differently depending on the THREAD_MODE.
• NUM_FILES_TO_READ is number of files to read.
  If you use a value larger than the one created and retrieved from DummyFileGenerator, an infinite loop occurs.
• MAX_READ_PROC_COUNT determines how many times to read in succession and perform the operation.
  This is only associated with ThreadMode::READ_N_AND_PROCESS_N.
• THREAD_MODE decides how IOThreadPool class will read the files. Please see below for details.

ThreadMode

// Open and read all files, and then process
READ_ALL_AND_PROCESS_ALL,

// Alway check both queue to read, and to process
READ_CHECK_PROCESS_CHECK,

// Repeat send read call for N files, and process N files
READ_N_AND_PROCESS_N,

// Open all files first, and read all files, and then process
CREATE_ALL_AND_READ_ALL_AND_PROCESS_ALL,

// Open all files first, and check both queue to read, and to process
CREATE_ALL_AND_READ_CHECK_PROCESS_CHECK,

// One thread only sends read call, other threads only process
SINGLE_READ_ONLY_ELSE_PROCESS_ONLY,

// One thread sends read call first and then process, other threads only process
SINGLE_READ_ALL_AND_PROCESS_ELSE_PROCESS_ONLY,

// NOT overlapped I/O, each thread open, read, and process each file
SYNC_IO,