cloud-sat/workers/sharer.cpp

#include "../light.hpp"
#include "basesolver.hpp"
#include "sharer.hpp"
#include "clause.hpp"
#include <unistd.h>
#include <boost/thread/thread.hpp>

void * share_worker(void *arg) {
    int nums = 0;
    sharer * sq = (sharer *)arg;
    auto clk_st = std::chrono::high_resolution_clock::now();
    double share_time = 0;
    while (true) {
        ++nums;
        if (sq->dps) {
            // printf("c sharing thread start wait\n");
            sq->waiting_for_all_ready();
            // printf("c sharing thread start sharing with number %d\n", sq->waitings); 
        }
        else {
            usleep(sq->share_intv);
        }
        auto clk_now = std::chrono::high_resolution_clock::now();
        int solve_time = std::chrono::duration_cast<std::chrono::milliseconds>(clk_now - clk_st).count();
        printf("c round %d, time: %d.%03d\n", nums, solve_time / 1000, solve_time % 1000);
        if (terminated) {
            if (sq->dps) sq->sharing_finish();
            break;
        }
        // printf("start sharing %d\n", sq->share_intv);
        for (int i = 0; i < sq->producers.size(); i++) {
            sq->cls.clear();
            sq->producers[i]->export_clauses_to(sq->cls);
            // printf("c size %d\n", sq->cls.size());
            int number = sq->cls.size();
            // printf("get %d exported clauses\n", number);
            int percent = sq->sort_clauses(i);
            if (percent < 75) {
                sq->producers[i]->broaden_export_limit();
            }
            else if (percent > 98) {
                sq->producers[i]->restrict_export_limit();
            }
            // for (int k = 0; k < sq->cls.size(); k++) {
            //     int x = sq->cls[k]->refs;
            //     printf("%d ", x);
            // }                
            // puts("");
            for (int j = 0; j < sq->consumers.size(); j++) {
                if (sq->producers[i]->id == sq->consumers[j]->id) continue;
                for (int k = 0; k < sq->cls.size(); k++)
                    sq->cls[k]->increase_refs(1);
                sq->consumers[j]->import_clauses_from(sq->cls);
            }
            for (int k = 0; k < sq->cls.size(); k++) {
                sq->cls[k]->free_clause();
            }
        }
        auto clk_ed = std::chrono::high_resolution_clock::now();
        share_time += 0.001 * std::chrono::duration_cast<std::chrono::milliseconds>(clk_ed - clk_now).count();
        
        if (sq->dps) {
            sq->sharing_finish();
        }
    }
    printf("c sharing nums: %d\nc sharing time: %.2lf\n", nums, share_time);
    // if (terminated) puts("terminated set to 1");
    return NULL;
}
 
// void sharer::select_clauses(int id) {
    
// }

bool sharer::import_clauses(int id) {
    int current_period = producers[id]->get_period() - 1, import_period = current_period - margin;
    if (import_period < 0) return false;
    basesolver *t = producers[id];
    for (int i = 0; i < producers.size(); i++) {
        if (i == id) continue;
        basesolver *s = producers[i];
        //wait for s reach period $import_period
        // printf("c %d start waiting, since import_p is %d, current_p is %d\n", id, import_period, s->get_period());
        // if (id == 3 && current_period == 84) printf("\tc thread 3 wait for %d\n", i);
        boost::mutex::scoped_lock lock(s->mtx);
        while (s->period <= import_period && s->winner_period > import_period && !s->terminated) {
            s->cond.wait(lock);
        }
        // if (id == 3 && current_period == 84) printf("\tc thread 3 finish wait for %d\n", i);
        
        if (s->terminated || s->winner_period <= import_period) return false; 
        // if (s->terminated) return; 

        period_clauses *pc = s->pq.find(import_period);
        if (pc->period != import_period) {
            printf("thread %d, now period = %d, import period = %d, import thread %d\n", id, current_period, import_period, i);
            puts("*******************************************************");
        }
        // printf("c %d finish waiting %d %d\n", id, import_period, s->period_queue[pos]->period);
        t->import_clauses_from(pc->cls);
    }
    return true;
    // printf("c thread %d, period %d, import finish\n", id, current_period);
}

int sharer::sort_clauses(int x) {
    for (int i = 0; i < cls.size(); i++) {
        int sz = cls[i]->size;
        // for (int j = 0; j < sz; j++) printf("%d ", cls[i]->data[j]);
        // puts("");
        while (sz > bucket[x].size()) bucket[x].push();
        if (sz * (bucket[x][sz - 1].size() + 1) <= share_lits) 
            bucket[x][sz - 1].push(cls[i]);
        // else
        //     cls[i]->free_clause();
    }
    cls.clear();
    int space = share_lits;
    for (int i = 0; i < bucket[x].size(); i++) {
        int clause_num = space / (i + 1);
        // printf("%d %d\n", clause_num, bucket[x][i].size());
        if (!clause_num) break;
        if (clause_num >= bucket[x][i].size()) {
            space -= bucket[x][i].size() * (i + 1);
            for (int j = 0; j < bucket[x][i].size(); j++)
                cls.push(bucket[x][i][j]);
            bucket[x][i].clear();
        }
        else {
            space -= clause_num * (i + 1);
            for (int j = 0; j < clause_num; j++) {
                cls.push(bucket[x][i].last());
                bucket[x][i].pop();
            }
        }
    }
    // for (int i = 0; i < cls.size(); i++) {
    //     int sz = cls[i]->size;
    //     for (int j = 0; j < sz; j++) printf("%d ", cls[i]->data[j]);
    //     puts("");
    // }
    return (share_lits - space) * 100 / share_lits;
}

void light::share() {
    printf("c sharing start\n");
    if (OPT(DPS) == 2) {
        sharer* s = new sharer(0, OPT(share_intv), OPT(share_lits), OPT(DPS));
        s->margin = OPT(margin);
        for (int j = 0; j < OPT(threads); j++) {
            s->producers.push(workers[j]);
            workers[j]->in_sharer = s;
        }
        sharers.push(s);
    }
    else {
        int sharers_number = 1;
        for (int i = 0; i < sharers_number; i++) {
            sharer* s = new sharer(i, OPT(share_intv), OPT(share_lits), OPT(DPS));
            for (int j = 0; j < OPT(threads); j++) {
                s->producers.push(workers[j]);
                s->consumers.push(workers[j]);
                workers[j]->in_sharer = s;
            }
            sharers.push(s);
        }
        
        pthread_t *ptr = new pthread_t[sharers_number];
        for (int i = 0; i < sharers_number; i++) {
            pthread_create(&ptr[i], NULL, share_worker, sharers[i]);
        }
    }   
}