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#include <includes.hpp>
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#include <iomanip>
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#include <utilities.hpp>
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#include <boost/program_options.hpp>
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#include <bsp.hpp>
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#include "wavelet.hpp"
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#include "wavelet_parallel.hpp"
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static struct {
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unsigned int P;
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unsigned int W;
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unsigned int H;
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unsigned int M;
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bool check_results;
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} globals;
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static std::vector<double> seqr;
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static std::vector<double> parr;
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using namespace wvlt;
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struct plan_2D {
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par::plan_1D horizontal;
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par::plan_1D vertical;
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};
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struct block {
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std::vector<double> data;
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std::vector<double> hcomm;
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std::vector<double> vcomm;
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block(plan_2D const & plan)
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: data(plan.horizontal.b * plan.vertical.b, 0.0)
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, hcomm(plan.horizontal.Cm * plan.vertical.b, 0.0)
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, vcomm(plan.horizontal.b * plan.vertical.Cm, 0.0)
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{}
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void push() {
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bsp::push_reg(data.data(), data.size());
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bsp::push_reg(hcomm.data(), hcomm.size());
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bsp::push_reg(vcomm.data(), vcomm.size());
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}
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void pop() {
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bsp::pop_reg(data.data());
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bsp::pop_reg(hcomm.data());
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bsp::pop_reg(vcomm.data());
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}
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};
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// Communicate vertical data from b (strided) to b2 (not strided)
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static void vcomm_step(wvlt::par::proc_info const & pi, plan_2D const & plan, block const & b, block & b2, unsigned int stride){
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const unsigned int Cm = plan.vertical.Cm;
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const unsigned int width = plan.horizontal.b;
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for(unsigned int i = 0; i < Cm; ++i){
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for(unsigned int x = 0; x < width; ++x){
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bsp::put(pi.prev, b.data.data() + x + width*stride*i, b2.vcomm.data(), x + width*i, 1);
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}
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}
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}
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// Communicate horizontal data from b (strided) to b2 (not strided)
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static void hcomm_step(wvlt::par::proc_info const & pi, plan_2D const & plan, block const & b, block & b2, unsigned int stride){
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const unsigned int Cm = plan.horizontal.Cm;
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const unsigned int width = plan.horizontal.b;
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for(unsigned int y = 0; y < plan.vertical.b; ++y){
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for(unsigned int i = 0; i < Cm; ++i){
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bsp::put(pi.prev, b.data.data() + width*y + stride*i, b2.hcomm.data(), Cm*y + i, 1);
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}
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}
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}
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static void vcomp_step(plan_2D const & plan, block & b, unsigned int stride){
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const unsigned int width = plan.horizontal.b;
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const unsigned int height = plan.vertical.b;
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unsigned int end = pow_two(plan.vertical.m);
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for(unsigned int x = 0; x < width; ++x){
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for(unsigned int i = 1; i < end; i <<= 1){
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wavelet_mul(b.data.data() + x, b.vcomm[x], b.vcomm[x + width*i], width*height, width*stride*i);
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if(i < end/2) wavelet_mul_base(&b.vcomm[x], width*(2*end - 2*i), width*i);
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}
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}
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}
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static void hcomp_step(plan_2D const & plan, block & b, unsigned int stride){
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const unsigned int width = plan.horizontal.b;
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const unsigned int height = plan.vertical.b;
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unsigned int end = pow_two(plan.horizontal.m);
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for(unsigned int y = 0; y < height; ++y){
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for(unsigned int i = 1; i < end; i <<= 1){
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auto x0 = b.hcomm[plan.horizontal.Cm*y];
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auto x1 = b.hcomm[plan.horizontal.Cm*y + i];
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wavelet_mul(b.data.data() + width*y, x0, x1, width, stride*i);
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if(i < end/2) wavelet_mul_base(&b.hcomm[plan.horizontal.Cm*y], 2*end - 2*i, i);
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}
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}
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}
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static void vstep(wvlt::par::proc_info const & pi, plan_2D const & plan, std::vector<block> & blocks, unsigned int stride){
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for(unsigned int b = 0; b < blocks.size(); ++b){
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unsigned int b2 = b;
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vcomm_step(pi, plan, blocks[b], blocks[b2], stride);
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}
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bsp::sync();
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for(unsigned int b = 0; b < blocks.size(); ++b){
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vcomp_step(plan, blocks[b], stride);
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}
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}
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static void hstep(wvlt::par::proc_info const & pi, plan_2D const & plan, std::vector<block> & blocks, unsigned int stride){
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for(unsigned int b = 0; b < blocks.size(); ++b){
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unsigned int b2 = (b-1+blocks.size()) % blocks.size();
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hcomm_step(pi, plan, blocks[b], blocks[b2], stride);
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}
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bsp::sync();
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for(unsigned int b = 0; b < blocks.size(); ++b){
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hcomp_step(plan, blocks[b], stride);
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}
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}
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// gets globals from processor 0
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static void get_globals(){
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bsp::push_reg(&globals);
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bsp::sync();
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bsp::get(0, &globals, 0, &globals);
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bsp::sync();
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bsp::pop_reg(&globals);
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}
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// fake data
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double data(unsigned int x, unsigned int y){
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return x*y;
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}
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static void par_wavelet_2D(){
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bsp::begin(globals.P);
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get_globals();
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const wvlt::par::proc_info d(bsp::nprocs(), bsp::pid());
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const wvlt::par::plan_1D horizontal(globals.W, globals.W/d.p, globals.M);
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const wvlt::par::plan_1D vertical(globals.H, globals.H/d.p, globals.M);
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const plan_2D plan{horizontal, vertical};
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auto bbb = block(plan);
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// We allocated everything up front, we don't actually need to do this
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// but it's easy, as we don't have to think of this later.
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std::vector<block> blocks(d.p, bbb);
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std::vector<double> hfinish(2 * d.p * vertical.b, 0.0);
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std::vector<double> vfinish(horizontal.b * 2 * d.p, 0.0);
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// As we will be generating the data, no need to sync
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for(unsigned int b = 0; b < blocks.size(); ++b){
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unsigned int x_start = b * horizontal.b;
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unsigned int y_start = (d.s - b + d.p)%d.p * vertical.b;
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for(unsigned int y = 0; y < vertical.b; ++y){
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for(unsigned int x = 0; x < horizontal.b; ++x){
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auto v = data(x_start + x, y_start + y);
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blocks[b].data[x + horizontal.b*y] = v;
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}
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}
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}
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for(auto & b : blocks) b.push();
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bsp::push_reg(hfinish.data(), hfinish.size());
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bsp::push_reg(vfinish.data(), vfinish.size());
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bsp::sync();
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double time1 = bsp::time();
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if(true){ // horizontal
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// do local wavelets and communications
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unsigned int stride = 1;
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for(unsigned int i = 0; i < horizontal.big_steps; ++i){
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hstep(d, plan, blocks, stride);
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stride <<= plan.horizontal.m;
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}
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// fan in to the right processor
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unsigned int hh = horizontal.b/2;
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for(unsigned int b = 0; b < blocks.size(); ++b){
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unsigned int t = (d.s - b + d.p)%d.p;
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unsigned int x_start = b * 2;
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auto ptr = blocks[b].data.data();
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for(unsigned int y = 0; y < vertical.b; ++y){
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// processor, source, dest, offset
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bsp::put(t, &ptr[0 + horizontal.b*y], hfinish.data(), 0 + x_start + 2*d.p*y);
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bsp::put(t, &ptr[hh + horizontal.b*y], hfinish.data(), 1 + x_start + 2*d.p*y);
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}
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}
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bsp::sync();
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// last step of the algorithm
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for(unsigned int y = 0; y < vertical.b; ++y){
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wvlt::wavelet(hfinish.data() + 2*d.p*y, 2*d.p, 1);
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}
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// fan out to the right processor
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for(unsigned int y = 0; y < vertical.b; ++y){
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for(unsigned int t = 0; t < d.p; ++t){
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unsigned int b = (t - d.s + d.p)%d.p;
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unsigned int x_start = b * 2;
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bsp::put(t, &hfinish[0 + x_start + 2*d.p*y], blocks[b].data.data(), 0 + horizontal.b*y);
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bsp::put(t, &hfinish[1 + x_start + 2*d.p*y], blocks[b].data.data(), hh + horizontal.b*y);
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}
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}
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bsp::sync();
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}
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if(true){ //vertical
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// do local wavelets and communications in other directions
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unsigned int stride = 1;
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for(unsigned int i = 0; i < vertical.big_steps; ++i){
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vstep(d, plan, blocks, stride);
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stride <<= plan.vertical.m;
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}
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// fan in to the right processor
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unsigned int hh = vertical.b/2;
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for(unsigned int b = 0; b < blocks.size(); ++b){
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unsigned int t = b;
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unsigned int y_start = (d.s - b + d.p)%d.p * 2;
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auto ptr = blocks[b].data.data();
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for(unsigned int x = 0; x < horizontal.b; ++x){
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// processor, source, dest, offset
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bsp::put(t, &ptr[x + 0 *horizontal.b], vfinish.data(), x + horizontal.b*(y_start + 0));
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bsp::put(t, &ptr[x + hh*horizontal.b], vfinish.data(), x + horizontal.b*(y_start + 1));
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}
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}
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bsp::sync();
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// last step of the algorithm
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for(unsigned int x = 0; x < horizontal.b; ++x){
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wvlt::wavelet(vfinish.data() + x, 2*d.p, horizontal.b);
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}
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// fan out to the right processor
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for(unsigned int x = 0; x < horizontal.b; ++x){
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for(unsigned int t = 0; t < d.p; ++t){
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unsigned int b = d.s;
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unsigned int y_start = (t - b + d.p)%d.p * 2;
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bsp::put(t, &vfinish[x + horizontal.b*(y_start + 0)], blocks[b].data.data(), horizontal.b*0 + x);
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bsp::put(t, &vfinish[x + horizontal.b*(y_start + 1)], blocks[b].data.data(), horizontal.b*hh + x);
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}
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}
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bsp::sync();
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}
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double time2 = bsp::time();
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if(d.s==0) printf("parallel version\t%f\n", time2 - time1);
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if(globals.check_results){
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bsp::push_reg(parr.data(), parr.size());
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bsp::sync();
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for(unsigned int b = 0; b < blocks.size(); ++b){
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unsigned int x_start = b * horizontal.b;
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unsigned int y_start = (d.s - b + d.p)%d.p * vertical.b;
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for(unsigned int y = 0; y < vertical.b; ++y){
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for(unsigned int x = 0; x < horizontal.b; ++x){
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auto v = blocks[b].data[x + horizontal.b*y];
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bsp::put(0, &v, parr.data(), x_start + x + horizontal.n*(y_start+y));
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}
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}
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}
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bsp::sync();
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}
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bsp::end();
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}
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static void seq_wavelet_2D(){
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for(unsigned int y = 0; y < globals.H; ++y)
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for(unsigned int x = 0; x < globals.W; ++x)
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seqr[x + globals.W*y] = data(x, y);
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auto time1 = timer::clock::now();
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wvlt::wavelet_2D(seqr.data(), globals.W, globals.H);
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auto time2 = timer::clock::now();
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printf("sequential version\t%f\n", timer::from_dur(time2 - time1));
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}
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static double sq_diff(double x, double y){ return (x-y)*(x-y); }
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static int compare_results(std::vector<double> const & lh, std::vector<double> const & rh, double threshold){
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if(lh == rh){
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std::cout << colors::green("SUCCES:") << " bitwise qual" << std::endl;
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return 0;
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}
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double rmse = std::sqrt(std::inner_product(lh.begin(), lh.end(), rh.begin(), 0.0, std::plus<double>(), &sq_diff) / lh.size());
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if(rmse <= threshold){
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std::cout << colors::green("SUCCES:") << " error within threshold, rmse = " << rmse << std::endl;
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return 1;
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} else {
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std::cout << colors::red("FAIL:") << " error to big, rmse = " << rmse << std::endl;
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return 2;
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}
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}
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int main(int argc, char** argv){
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bsp::init(par_wavelet_2D, argc, argv);
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namespace po = boost::program_options;
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// Describe program options
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po::options_description opts;
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opts.add_options()
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("p", po::value<unsigned int>(), "number of processors")
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("w", po::value<unsigned int>(), "width of image")
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("h", po::value<unsigned int>(), "height of image")
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("m", po::value<unsigned int>()->default_value(1), "the variable m")
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("help", po::bool_switch(), "show this help")
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("show-input", po::bool_switch(), "shows the given input")
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("seq", po::bool_switch(), "also runs the sequential algorithm")
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("check", po::bool_switch(), "enables correctness checks");
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po::variables_map vm;
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// Parse and set options
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try {
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po::store(po::parse_command_line(argc, argv, opts), vm);
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po::notify(vm);
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if(vm["help"].as<bool>()){
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std::cout << "Parallel wavelet mockup" << std::endl;
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std::cout << opts << std::endl;
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return 0;
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}
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globals.P = vm["p"].as<unsigned int>();
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globals.W = vm["w"].as<unsigned int>();
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globals.H = vm["h"].as<unsigned int>();
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globals.M = vm["m"].as<unsigned int>();
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globals.check_results = vm["check"].as<bool>();
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if(!is_pow_of_two(globals.P)) throw po::error("p is not a power of two");
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if(!is_pow_of_two(globals.W)) throw po::error("w is not a power of two");
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|
|
if(!is_pow_of_two(globals.H)) throw po::error("h is not a power of two");
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|
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} catch(std::exception& e){
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|
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std::cout << colors::red("ERROR: ") << e.what() << std::endl;
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|
|
std::cout << opts << std::endl;
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return 1;
|
|
|
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}
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|
|
|
if(vm["show-input"].as<bool>()){
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|
|
|
std::cout << "w\t" << globals.W << "h\t" << globals.H << "\np\t" << globals.P << "\nm\t" << globals.M << std::endl;
|
|
|
|
}
|
|
|
|
|
|
|
|
seqr.assign(globals.W*globals.H, 0.0);
|
|
|
|
parr.assign(globals.W*globals.H, 0.0);
|
|
|
|
|
|
|
|
par_wavelet_2D();
|
|
|
|
seq_wavelet_2D();
|
|
|
|
|
|
|
|
if(globals.check_results){
|
|
|
|
double threshold = 1.0e-8;
|
|
|
|
std::cout << "Checking results ";
|
|
|
|
compare_results(seqr, parr, threshold);
|
|
|
|
}
|
|
|
|
}
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