cudadl/controller_main.cc

#include <NTL/ZZ.h>

#include <iostream>

#include <string.h>
#include <stdlib.h>

#include "controller.h"

NTL_CLIENT

static unsigned short total_nodes = 0;
static unsigned short GB_mem_per_node = 0;

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 = 1;
    // 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);
    }
}

static void boundcb(const char *boundaddr, unsigned short boundport)
{
    cout << "Listening on " << boundaddr << ":" << boundport << "\n";
    const char *fdenv = getenv("CONTROLLER_BOUNDCB_FD");
    if (fdenv) {
	int fd = atoi(fdenv);
	if (fd > 2) {
	    write(fd, &boundport, 2);
	    write(fd, boundaddr, strlen(boundaddr));
	    close(fd);
	}
    }
}

int main(int argc, char **argv)
{
    unsigned short bindport = 0;
    Worklist worklist;

    if (controller_parse_args(argc, argv, bindport, worklist,
				total_nodes, GB_mem_per_node)) {
	std::cerr << "Usage: " << argv[0] << " [-p listenport] [-n num_nodes] [-m GB_mem_per_node] [-r reps] N1 iter1 N2 iter2 ...\n";
	return 1;
    }

    return controller_main(worklist, bindport, boundcb);
}