Centre Blaise Pascal » Bench4GPU

#!/usr/bin/env python

#

# Ising2D model in serial mode

#

# CC BY-NC-SA 2011 : <emmanuel.quemener@ens-lyon.fr>

import sys

import numpy

from PIL import Image

from math import exp

from random import random

import time

import getopt

import matplotlib.pyplot as plt

import Metropolis

from Metropolis import Metropolis

def ImageOutput(sigma,prefix):

    Max=sigma.max()

    Min=sigma.min()

    # Normalize value as 8bits Integer

    SigmaInt=(255*(sigma-Min)/(Max-Min)).astype('uint8')

    image = Image.fromarray(SigmaInt)

    image.save("%s.jpg" % prefix)

def Magnetization(sigma,M):

    return(numpy.sum(sigma)/(sigma.shape[0]*sigma.shape[1]*1.0))

def Energy(sigma,J):

    # Copier et caster

    E=numpy.copy(sigma).astype(numpy.float32)

    # Appel par slice

    E[1:-1,1:-1]=-J*E[1:-1,1:-1]*(E[:-2,1:-1]+E[2:,1:-1]+

                                  E[1:-1,:-2]+E[1:-1,2:])

    # Bien nettoyer la peripherie

    E[:,0]=0

    E[:,-1]=0

    E[0,:]=0

    E[-1,:]=0

    Energy=numpy.sum(E)

    return(Energy/(E.shape[0]*E.shape[1]*1.0))

def DisplayCurves(T,E,M,J,B):

    plt.xlabel("Temperature")

    plt.ylabel("Energy")

    Experience,=plt.plot(T,E,label="Energy")

    plt.legend()

    plt.show()

if __name__=='__main__':

    # Set defaults values

    # Coupling factor

    J=1.

    # Magnetic Field

    B=0.

    # Size of Lattice

    Size=256

    # Default Temperatures (start, end, step)

    Tmin=0.1

    Tmax=5

    Tstep=0.1

    # Default Number of Iterations

    Iterations=Size*Size

    # Curves is True to print the curves

    Curves=False

    try:

        opts, args = getopt.getopt(sys.argv[1:],"hcj:b:z:i:s:e:p:",["coupling=","magneticfield=","size=","iterations=","tempstart=","tempend=","tempstep="])

    except getopt.GetoptError:

        print '%s -j <Coupling Factor> -b <Magnetic Field> -z <Size of Lattice> -i <Iterations> -s <Minimum Temperature> -e <Maximum Temperature> -p <steP Temperature> -c (Print Curves)' % sys.argv[0]

        sys.exit(2)

    for opt, arg in opts:

        if opt == '-h':

            print '%s -j <Coupling Factor> -b <Magnetic Field> -z <Size of Lattice> -i <Iterations> -s <Minimum Temperature> -e <Maximum Temperature> -p <steP Temperature> -c (Print Curves)' % sys.argv[0]

            sys.exit()

        elif opt == '-c':

            Curves=True

        elif opt in ("-j", "--coupling"):

            J = float(arg)

        elif opt in ("-b", "--magneticfield"):

            B = float(arg)

        elif opt in ("-s", "--tempmin"):

            Tmin = float(arg)

        elif opt in ("-e", "--tempmax"):

            Tmax = arg

        elif opt in ("-p", "--tempstep"):

            Tstep = numpy.uint32(arg)

        elif opt in ("-i", "--iterations"):

            Iterations = int(arg)

        elif opt in ("-z", "--size"):

            Size = int(arg)

    print "Coupling Factor : %s" % J

    print "Magnetic Field :  %s" % B

    print "Size of lattice : %s" % Size

    print "Iterations : %s" % Iterations

    print "Temperature on start : %s" % Tmin

    print "Temperature on end : %s" % Tmax

    print "Temperature step : %s" % Tstep

    LAPIMAGE=False

    sigmaIn=numpy.where(numpy.random.randn(Size,Size)>0,1,-1).astype(numpy.int8)

    ImageOutput(sigmaIn,"Ising2D_Serial_%i_Initial" % (Size))

    Trange=numpy.arange(Tmin,Tmax+Tstep,Tstep)

    E=[]

    M=[]

    for T in Trange:

        # Indispensable d'utiliser copy : [:] ne fonctionne pas avec numpy !

        sigma=numpy.copy(sigmaIn)

        duration=Metropolis(sigma,J,B,T,Iterations)

        E=numpy.append(E,Energy(sigma,J))

        M=numpy.append(M,Magnetization(sigma,B))

        ImageOutput(sigma,"Ising2D_Serial_%i_%1.1f_Final" % (Size,T))

        print "CPU Time : %f" % (duration)

        print "Total Energy at Temperature %f : %f" % (T,E[-1])

        print "Total Magnetization at Temperature %f : %f" % (T,M[-1])

    if Curves:

        DisplayCurves(Trange,E,M,J,B)

    # Save output

    numpy.savez("Ising2D_Serial_%i_%.8i" % (Size,Iterations),(Trange,E,M))