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reactivetube_opencl.f95
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program reactivetube
use clfortran
use clroutines
use utils
use ISO_C_BINDING
implicit none
include 'data'
real :: t, start, time, maxspeed, flops
integer :: iter, count, rate
real, target :: dt, cl_dx
real, allocatable :: u(:), temp(:),m(:),mask(:)
real, allocatable, target :: state(:,:), w(:,:)
!OpenCl variables
integer(c_size_t) :: byte_size, ret
integer(c_int32_t) :: err
character(len=1024) :: options, kernel_name1, kernel_name2
character(len=1, kind=c_char),allocatable :: kernel_str(:)
integer, target :: np
integer(c_size_t),target :: globalsize,localsize
integer(c_intptr_t), target :: cmd_queue, context, kernel1, kernel2, cl_state, cl_state_old, cl_w, cl_f
integer(c_intptr_t), allocatable, target :: platform_ids(:), device_ids(:)
allocate(state(1:n,1:4))
allocate(w(1:n,1:4))
allocate(u(1:n))
allocate(temp(1:n))
allocate(m(1:n))
allocate(mask(1:n))
dt = cfl * dx / char_c
cl_dx = dx
iter = 0
t = 0
w = 0
np = n
kernel_name1='lax'
kernel_name2='get_fw'
options = '-Werror'
byte_size = 4_8 * int(4 * n,8)
! state = [rho rho*u rho*E Y]
!print *, cp, bc_a_lbc_rho_l,bc_p_l,bc_u_l,bc_y_l,bc_rho_r,bc_p_r,bc_u_r,bc_y_r,bc_t_l,bc_a_l,bc_t_r,bc_a_r,c_char, n
call init(state)
call create_device_context(iplatform, platform_ids, device_ids, context, cmd_queue)
call query_platform_info(platform_ids(iplatform))
call read_file('lax.cl', kernel_str)
call init_kernel(kernel1, context, iplatform, platform_ids, device_ids,kernel_name1, kernel_str, options)
call init_kernel(kernel2, context,iplatform, platform_ids, device_ids,kernel_name2, kernel_str, options)
!Allocate memory
cl_state = clCreateBuffer(context, CL_MEM_READ_WRITE,byte_size,C_NULL_PTR, err)
if (err.ne.0) stop 'clCreateBuffer'
cl_state_old = clCreateBuffer(context, CL_MEM_READ_WRITE,byte_size,C_NULL_PTR, err)
if (err.ne.0) stop 'clCreateBuffer'
cl_w = clCreateBuffer(context, CL_MEM_READ_WRITE,byte_size,C_NULL_PTR, err)
if (err.ne.0) stop 'clCreateBuffer'
cl_f = clCreateBuffer(context, CL_MEM_READ_WRITE,byte_size,C_NULL_PTR, err)
if (err.ne.0) stop 'clCreateBuffer'
!Copy data, 0_8 is a zero of kind=8
err=clEnqueueWriteBuffer(cmd_queue,cl_w,CL_TRUE,0_8,byte_size,C_LOC(w), 0,C_NULL_PTR,C_NULL_PTR)
if (err.ne.0) stop 'clEnqueueWriteBuffer'
err=clEnqueueWriteBuffer(cmd_queue,cl_state,CL_TRUE,0_8,byte_size,C_LOC(state), 0,C_NULL_PTR,C_NULL_PTR)
if (err.ne.0) stop 'clEnqueueWriteBuffer'
!Set kernel arguments
err=clSetKernelArg(kernel1,0,sizeof(dt),C_LOC(dt))
if (err.ne.0) stop 'clSetKernelArg'
err=clSetKernelArg(kernel1,1,sizeof(dx),C_LOC(cl_dx))
if (err.ne.0) stop 'clSetKernelArg'
err=clSetKernelArg(kernel1,2,sizeof(np),C_LOC(np))
if (err.ne.0) stop 'clSetKernelArg'
err=clSetKernelArg(kernel1,3,sizeof(cl_state),C_LOC(cl_state))
if (err.ne.0) stop 'clSetKernelArg'
err=clSetKernelArg(kernel1,4,sizeof(cl_state_old),C_LOC(cl_state_old))
if (err.ne.0) stop 'clSetKernelArg'
err=clSetKernelArg(kernel1,5,sizeof(cl_f),C_LOC(cl_f))
if (err.ne.0) stop 'clSetKernelArg'
err=clSetKernelArg(kernel1,6,sizeof(cl_w),C_LOC(cl_w))
if (err.ne.0) stop 'clSetKernelArg'
!Set kernel arguments
err=clSetKernelArg(kernel2,0,sizeof(np),C_LOC(np))
if (err.ne.0) stop 'clSetKernelArg'
err=clSetKernelArg(kernel2,1,sizeof(cl_state),C_LOC(cl_state))
if (err.ne.0) stop 'clSetKernelArg'
err=clSetKernelArg(kernel2,2,sizeof(cl_state_old),C_LOC(cl_state_old))
if (err.ne.0) stop 'clSetKernelArg'
err=clSetKernelArg(kernel2,3,sizeof(cl_f),C_LOC(cl_f))
if (err.ne.0) stop 'clSetKernelArg'
err=clSetKernelArg(kernel2,4,sizeof(cl_w),C_LOC(cl_w))
if (err.ne.0) stop 'clSetKernelArg'
!get the local size for the kernel
err=clGetKernelWorkGroupInfo(kernel1,device_ids(1), CL_KERNEL_WORK_GROUP_SIZE,sizeof(localsize), C_LOC(localsize),ret)
err=clGetKernelWorkGroupInfo(kernel2,device_ids(1), CL_KERNEL_WORK_GROUP_SIZE,sizeof(localsize), C_LOC(localsize),ret)
if (err.ne.0) stop 'clGetKernelWorkGroupInfo'
globalsize=int(n,8)
if (mod(globalsize,localsize).ne.0) then
globalsize = globalsize+localsize-mod(globalsize,localsize)
end if
print * ,globalsize, localsize
call system_clock(count, rate)
start = count / real(rate)
do while (t< t_end)
iter = iter + 1
t = t + dt
err=clEnqueueNDRangeKernel(cmd_queue,kernel2,1,C_NULL_PTR,C_LOC(globalsize),C_LOC(localsize),0,C_NULL_PTR,C_NULL_PTR)
if (err.ne.0) stop 'clEnqueueNDRangeKernel'
!err=clFinish(cmd_queue)
!if (err.ne.0) stop 'clFinish'
err=clEnqueueNDRangeKernel(cmd_queue,kernel1,1,C_NULL_PTR,C_LOC(globalsize),C_LOC(localsize),0,C_NULL_PTR,C_NULL_PTR)
if (err.ne.0) stop 'clEnqueueNDRangeKernel'
if (modulo(iter , update) .EQ. 0) then
err=clFinish(cmd_queue)
if (err.ne.0) stop 'clFinish'
err = clEnqueueReadBuffer(cmd_queue,cl_w,CL_TRUE,0_8,byte_size,C_LOC(w),0,C_NULL_PTR,C_NULL_PTR)
err=clFinish(cmd_queue)
if (err.ne.0) stop 'clFinish'
u = w(:,1)
temp = w(:,2)
mask = merge(0.,1.,u < 1e-10)
u = u * mask
m = sqrt( gamma * r * temp)/u
maxspeed= maxval( abs(pack(u,m < HUGE(dx)) * (abs(pack(m,m < HUGE(dx))) + 1)));
!maxspeed = max(maxval(w(:,4)), maxspeed)
dt = cfl * dx / maxspeed
!if( dt < min_dt) dt = min_dt
if (verbose) then
print *,"Time = ", t , "dt = ", dt, "MaxSpeed = ", maxspeed, "Progress= ", t/t_end
end if
err=clSetKernelArg(kernel1,0,sizeof(dt),C_LOC(dt))
if (err.ne.0) stop 'clSetKernelArg'
err=clFinish(cmd_queue)
if (err.ne.0) stop 'clFinish'
end if
end do
call system_clock(count, rate)
err=clEnqueueNDRangeKernel(cmd_queue,kernel2,1,C_NULL_PTR,C_LOC(globalsize),C_LOC(localsize),0,C_NULL_PTR,C_NULL_PTR)
if (err.ne.0) stop 'clEnqueueNDRangeKernel'
err=clFinish(cmd_queue)
if (err.ne.0) stop 'clFinish'
err = clEnqueueReadBuffer(cmd_queue,cl_state,CL_TRUE,0_8,byte_size,C_LOC(state),0,C_NULL_PTR,C_NULL_PTR)
if (err.ne.0) stop 'clEnqueueReadBuffer'
time = count / real(rate) - start
flops = cost(n,iter, update)
err = clReleaseCommandQueue(cmd_queue)
err = clReleaseContext(context)
print *,'Number of points: ', n
print *,'Iterations: ', iter
print *,'Time/s:', time
print *,'Flops/s: ', flops/time
call write_out(state, t, dt)
end program reactivetube