Centre Blaise Pascal » Bench4GPU

#!/usr/bin/env python

# -*- coding: utf-8 -*-

"""

Demonstrateur OpenCL d'interaction NCorps

Emmanuel QUEMENER <emmanuel.quemener@ens-lyon.fr> CeCILLv2

"""

import getopt

import sys

import time

import numpy as np

import pyopencl as cl

import pyopencl.array as cl_array

from numpy.random import randint as nprnd

BlobOpenCL= """

#define znew  ((z=36969*(z&65535)+(z>>16))<<16)

#define wnew  ((w=18000*(w&65535)+(w>>16))&65535)

#define MWC   (znew+wnew)

#define SHR3  (jsr=(jsr=(jsr=jsr^(jsr<<17))^(jsr>>13))^(jsr<<5))

#define CONG  (jcong=69069*jcong+1234567)

#define KISS  ((MWC^CONG)+SHR3)

#define MWCfp MWC * 2.328306435454494e-10f

#define KISSfp KISS * 2.328306435454494e-10f

#define SHR3fp SHR3 * 2.328306435454494e-10f

#define CONGfp CONG * 2.328306435454494e-10f

#define LENGTH 1.

#define PI 3.14159265359

#define SMALL_NUM 0.000000001

float Gravity(float4 m,float4 n)

{

    return((float)(1./pow(distance(m,n),2)));

}

float8 RungeKutta(__global float8* clDataIn,int gid,float h)

{

    float4 c[4],d[4],ct,dt;

    c[0]=h*clDataIn[gid].hi;

    c[1]=h*(clDataIn[gid].hi+c[0]/(float)2.);

    c[2]=h*(clDataIn[gid].hi+c[1]/(float)2.);

    c[3]=h*(clDataIn[gid].hi+c[2]);

    d[0]=(0.,0.,0.,0.);

    for (int i=0;i<get_global_size(0);i++)

    {

        if (gid != i)

        d[0]+=Gravity(clDataIn[gid].lo,clDataIn[i].lo);

    }

    d[0]*=h;

    d[1]=(0.,0.,0.,0.);

    for (int i=0;i<get_global_size(0);i++)

    {

        if (gid != i)

        d[1]+=Gravity(clDataIn[gid].lo+d[0]/(float)2.,clDataIn[i].lo);

    }

    d[1]*=h;

    d[2]=(0.,0.,0.,0.);

    for (int i=0;i<get_global_size(0);i++)

    {

        if (gid != i)

        d[2]+=Gravity(clDataIn[gid].lo+d[1]/(float)2.,clDataIn[i].lo);

    }

    d[2]*=h;

    d[3]=(0.,0.,0.,0.);

    for (int i=0;i<get_global_size(0);i++)

    {

        if (gid != i)

        d[3]+=Gravity(clDataIn[gid].lo+d[2],clDataIn[i].lo);

    }

    d[3]*=h;

//    ct=clDataIn[gid].lo+(c[0]+(float)2.*c[1]+(float)2.*c[2]+c[3])/(float)6.;

//    dt=clDataIn[gid].hi+(d[0]+(float)2.*d[1]+(float)2.*d[2]+d[3])/(float)6.;

    if (gid != 0)

        ct=(float4)distance(clDataIn[gid],clDataIn[0]);

    else

        ct=(float4)3.14159;

    dt=(float4)0;

    return((float8)(ct.s0,ct.s1,ct.s2,ct.s3,dt.s0,dt.s1,dt.s2,dt.s3));

}

__kernel void SplutterPoints(__global float8* clData, float box, float velocity,

                               uint seed_z,uint seed_w)

{

    int gid = get_global_id(0);

    uint z=seed_z+(uint)gid;

    uint w=seed_w-(uint)gid;

    float theta=MWCfp*PI;

    float phi=MWCfp*PI*2.;

    float sinTheta=sin(theta);

    clData[gid].s01234567 = (float8) (box*MWCfp,box*MWCfp,box*MWCfp,0.,0.,0.,0.,0.);

    clData[gid].s4=velocity*sinTheta*cos(phi);

    clData[gid].s5=velocity*sinTheta*sin(phi);

    clData[gid].s6=velocity*cos(theta);

}

__kernel void Evolution(__global float8* clDataOut,__global float8* clDataIn, float h)

{

    int gid = get_global_id(0);

    clDataOut[gid]=RungeKutta(clDataIn,gid,h);

    barrier(CLK_GLOBAL_MEM_FENCE);

}

__kernel void Commit(__global float8* clDataOut,__global float8* clDataIn)

{

    int gid = get_global_id(0);

    clDataIn[gid]=clDataOut[gid];

    barrier(CLK_GLOBAL_MEM_FENCE);

}

"""

if __name__=='__main__':

    # Set defaults values

    # Id of Device : 1 is for first find !

    Device=2

    # Iterations is integer

    Number=2

    # Size of box

    SizeOfBox=1000.

    # Initial velocity of particules

    Velocity=10.

    # Redo the last process

    Redo=1

    # Step

    Step=1.

    HowToUse='%s -d <DeviceId> -n <NumberOfSegments> -z <SizeOfBox> -v <Velocity> -s <Step>'

    try:

        opts, args = getopt.getopt(sys.argv[1:],"hd:n:z:v:r:",["device=","number=","size=","velocity=","redo=","step=1"])

    except getopt.GetoptError:

        print HowToUse % sys.argv[0]

        sys.exit(2)

    for opt, arg in opts:

        if opt == '-h':

            print HowToUse % sys.argv[0]

            print "\nInformations about devices detected under OpenCL:"

            try:

                Id=1

                for platform in cl.get_platforms():

                    for device in platform.get_devices():

                        deviceType=cl.device_type.to_string(device.type)

                        print "Device #%i from %s of type %s : %s" % (Id,platform.vendor.lstrip(),deviceType,device.name.lstrip())

                        Id=Id+1

                sys.exit()

            except ImportError:

                print "Your platform does not seem to support OpenCL"

                sys.exit()

        elif opt in ("-d", "--device"):

            Device=int(arg)

        elif opt in ("-n", "--number"):

            Number=int(arg)

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

            SizeOfBox=np.float32(arg)

        elif opt in ("-v", "--velocity"):

            Velocity=np.float32(arg)

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

            Step=np.float32(arg)

        elif opt in ("-r", "--redo"):

            Redo=int(arg)

    print "Device choosed : %s" % Device

    print "Number of segments : %s" % Number

    print "Size of Box : %s" % SizeOfBox

    print "Initial velocity % s" % Velocity

    print "Redo the last process % s" % Redo

    print "Step of iteration % s" % Step

    MyData = np.zeros(Number, dtype=cl_array.vec.float8)

    Id=1

    HasXPU=False

    for platform in cl.get_platforms():

        for device in platform.get_devices():

            if Id==Device:

                PlatForm=platform

                XPU=device

                print "CPU/GPU selected: ",device.name.lstrip()

                HasXPU=True

            Id+=1

    if HasXPU==False:

        print "No XPU #%i found in all of %i devices, sorry..." % (Device,Id-1)

        sys.exit()

    # Je cree le contexte et la queue pour son execution

    try:

        ctx = cl.Context([XPU])

        queue = cl.CommandQueue(ctx,properties=cl.command_queue_properties.PROFILING_ENABLE)

    except:

        print "Crash during context creation"

    MyRoutines = cl.Program(ctx, BlobOpenCL).build()

    MyData[1][0]=1.

    mf = cl.mem_flags

    # clDataIn = cl.Buffer(ctx, mf.READ_WRITE, MyData.nbytes)

    clDataIn = cl.Buffer(ctx, mf.WRITE_ONLY|mf.COPY_HOST_PTR,hostbuf=MyData)

    clDataOut = cl.Buffer(ctx, mf.READ_WRITE, MyData.nbytes)

    print 'Tous au meme endroit',MyData

    # MyRoutines.SplutterPoints(queue,(Number,1),None,clDataIn,np.float32(SizeOfBox),np.float32(Velocity),np.uint32(nprnd(2**32)),np.uint32(nprnd(2**32)))

    print 'Tous distribues',MyData

    CLLaunch=MyRoutines.Evolution(queue,(Number,1),None,clDataOut,clDataIn,np.float32(Step))

    CLLaunch.wait()

    cl.enqueue_copy(queue, MyData, clDataOut)

    print 'Tous calcules',MyData

    CLLaunch=MyRoutines.Commit(queue,(Number,1),None,clDataOut,clDataIn)

    CLLaunch.wait()

    time_start=time.time()

    for i in xrange(Redo):

        #CLLaunch=MyRoutines.ShortestDistance(queue, (Number,Number), None, clData, clDistance)

        sys.stdout.write('.')

        #CLLaunch.wait()

    print "\nDuration on %s for each %s" % (Device,(time.time()-time_start)/Redo)

    clDataIn.release()

    clDataOut.release()