README.md

Accelerating Monte Carlo simulations of 2D Ising Model using Nvidia GPU

Usage

Compile ncvv ising_gpu.cu -o ising -std=c++11 -lcurand

Run ./ising -l 1024 -s 200000 -m 1000

Options:

    -l: Specify the size of 2D lattice

    -t: Specify the targeting temperature 
    
    -s: Specify the Monte Carlo sweep for equilibration
    
    -m: Specify the Monte Carlo sweep for measurement
    
    -f: 1 for writing spin configuration to file. Default: 0 

Results

Monte Carlo sweep per ms

Lattice size: 1024 $\times$ 1024

CPU (Intel 11500): 0.023; GPU (Nvidia 1660 supper): 6.60

GPU speedup: 6.60/0.023 $\approx$ 287.

GPU is about 287 time fatser than naive CPU implementation.

Physical quantities

Susceptibility as a function of temperature

A snapshot of spin configuration in Monte Carlo simulation.