source: benchmark/readyQ/churn.cfa @ 86530e7

#include "rq_bench.hfa"

unsigned spot_cnt = 2;
bench_sem * volatile * spots;

thread BThrd {
        unsigned long long count;
        unsigned long long blocks;
        bench_sem sem;
};

void ?{}( BThrd & this ) {
        ((thread&)this){ bench_cluster };
        this.count  = 0;
        this.blocks = 0;
}

void ^?{}( BThrd & mutex this ) {}

void main( BThrd & this ) with( this ) {
        wait( sem );
        for() {
                uint32_t r = prng();
                bench_sem * next = __atomic_exchange_n(&spots[r % spot_cnt], &sem, __ATOMIC_SEQ_CST);
                if(next) post( *next );
                blocks += wait( sem );
                count ++;
                if( clock_mode && stop) break;
                if(!clock_mode && count >= stop_count) break;
        }

        __atomic_fetch_add(&threads_left, -1, __ATOMIC_SEQ_CST);
}


int main(int argc, char * argv[]) {
        cfa_option opt[] = {
                BENCH_OPT,
                { 's', "spots", "Number of spots in the system", spot_cnt }
        };
        BENCH_OPT_PARSE("cforall cycle benchmark");

        {
                unsigned long long global_counter = 0;
                unsigned long long global_blocks  = 0;
                Time start, end;
                BenchCluster bc = { nprocs };
                {
                        spots = aalloc(spot_cnt);
                        for(i; spot_cnt) {
                                spots[i] = 0p;
                        }

                        threads_left = nthreads;
                        BThrd * threads[nthreads];
                        for(i; nthreads ) {
                                threads[i] = malloc();
                                (*threads[i]){};
                        }
                        printf("Starting\n");

                        bool is_tty = isatty(STDOUT_FILENO);
                        start = timeHiRes();

                        for(i; nthreads) {
                                post( threads[i]->sem );
                        }
                        wait(start, is_tty);

                        stop = true;
                        end = timeHiRes();
                        printf("\nDone\n");

                        for(i; nthreads) {
                                post( threads[i]->sem );
                                BThrd & thrd = join( *threads[i] );
                                global_counter += thrd.count;
                                global_blocks  += thrd.blocks;
                                delete(threads[i]);
                        }

                        free(spots);
                }

                printf("Duration (ms)        : %'lf\n", (end - start)`dms);
                printf("Number of processors : %'d\n", nprocs);
                printf("Number of threads    : %'d\n", nthreads);
                printf("Number of spots      : %'d\n", spot_cnt);
                printf("Total Operations(ops): %'15llu\n", global_counter);
                printf("Total blocks         : %'15llu\n", global_blocks);
                printf("Ops per second       : %'18.2lf\n", ((double)global_counter) / (end - start)`ds);
                printf("ns per ops           : %'18.2lf\n", (end - start)`dns / global_counter);
                printf("Ops per threads      : %'15llu\n", global_counter / nthreads);
                printf("Ops per procs        : %'15llu\n", global_counter / nprocs);
                printf("Ops/sec/procs        : %'18.2lf\n", (((double)global_counter) / nprocs) / (end - start)`ds);
                printf("ns per ops/procs     : %'18.2lf\n", (end - start)`dns / (global_counter / nprocs));
                fflush(stdout);
        }

        return 0;
}