source: mainline/uspace/app/tester/ipc/ping_pong.c@ 8ebc8bf4

/*
 * Copyright (c) 2009 Jiri Svoboda
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <stdio.h>
#include <stdlib.h>
#include <console.h>
#include <sys/time.h>
#include "../tester.h"

#define DURATION_SECS            10
#define COUNT_GRANULARITY       100

char * test_ping_pong(bool quiet)
{
        int i;
        int w, h;
        struct timeval start, now;
        long count;

        printf("Pinging console server for %d seconds...\n", DURATION_SECS);

        if (gettimeofday(&start, NULL) != 0)
                return "Failed getting the time.";

        count = 0;

        while (true) {
                if (gettimeofday(&now, NULL) != 0)
                        return "Failed getting the time.";

                if (tv_sub(&now, &start) >= DURATION_SECS * 1000000L)
                        break;

                for (i = 0; i < COUNT_GRANULARITY; i++)
                        console_get_size(&w, &h);
                count += COUNT_GRANULARITY;
        }

        printf("Completed %ld round trips in %d seconds, %ld RT/s.\n", count,
            DURATION_SECS, count / DURATION_SECS);

        return NULL;
}