cudadl/controller_main.cc

#include <NTL/ZZ.h>

#include <iostream>

#include <stdlib.h>

#include "controller.h"

NTL_CLIENT

void desired_resources(const ZZ &order, unsigned short &desired_dpnodes,
    unsigned int &max_workers, unsigned int &dpfreq)
{
    // How many DPnodes should we use for a problem of this size?
    desired_dpnodes = 2;
    // How many workers would we like to use?
    ZZ sorder = SqrRoot(order >> 46);
    if (NumBits(sorder) > 30) {
	// Just use all the workers we can find
	max_workers = 4294967295U;  // 2^32 - 1
    } else {
	max_workers = trunc_long(sorder,31) + 1;
    }

    // By default, 1 in 1000 points are distinguihed points.  The
    // number in the next line is 2^32/1000
    dpfreq = 4294967;
    if (order < 1000) {
	// Just make every point a DP
	dpfreq = 4294967295U;
    } else if (NumBits(order) < 27) {
	// The frequency of DPs should be 10/sqrt(order) to avoid
	// a DP-free cycle, so dpfreq = (10*2^32)/sqrt(order)
	ZZ f = (to_ZZ(10) << 32) / SqrRoot(order);
	dpfreq = trunc_long(f, 31);
    }
}

int main(int argc, char **argv)
{
    if (argc < 2) {
	std::cerr << "Usage: " << argv[0] << " N [listenport]\n";
	return 1;
    }

    unsigned short bindport = 0;

    if (argc > 2) {
	bindport = strtoul(argv[2], NULL, 10);
    }

    return controller_main(argv[1], bindport);
}