source: benchmark/readyQ/yield.cfa@ 9cf2b0f

#include "rq_bench.hfa"

extern bool traceHeapOn();


volatile bool run = false;
volatile unsigned long long global_counter;

thread __attribute__((aligned(128))) Yielder {
        unsigned long long counter;
};
void ?{}( Yielder & this ) {
        this.counter = 0;
        ((thread&)this){ "Yielder Thread" };
}

void main( Yielder & this ) {
        park();
        /* paranoid */ assert( true == __atomic_load_n(&run, __ATOMIC_RELAXED) );

        while(__atomic_load_n(&run, __ATOMIC_RELAXED)) {
                yield();
                this.counter++;
        }
        __atomic_fetch_add(&global_counter, this.counter, __ATOMIC_SEQ_CST);
}

int main(int argc, char * argv[]) {
        cfa_option opt[] = {
                BENCH_OPT
        };
        BENCH_OPT_PARSE("cforall yield benchmark");

        {
                printf("Running %d threads on %d processors for %f seconds\n", nthreads, nprocs, duration);

                Time start, end;
                BenchCluster bc = { nprocs };
                {
                        Yielder threads[nthreads];
                        printf("Starting\n");

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

                        for(i; nthreads) {
                                unpark( threads[i] );
                        }
                        wait(start, is_tty);

                        run = false;
                        end = timeHiRes();
                        printf("\nDone\n");
                }

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