xref/libmicro/dup.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms
 * of the Common Development and Distribution License
 * (the "License").  You may not use this file except
 * in compliance with the License.
 *
 * You can obtain a copy of the license at
 * src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing
 * permissions and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL
 * HEADER in each file and include the License file at
 * usr/src/OPENSOLARIS.LICENSE.  If applicable,
 * add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your
 * own identifying information: Portions Copyright [yyyy]
 * [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*
 * time dup
 */

#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>

#include "libmicro.h"

#define DEFF            "/dev/null"
static char         *optf = DEFF;

static int          fd;

typedef struct {
    int         ts_once;
    int         *ts_fds;
} tsd_t;

int
benchmark_init()
{
    lm_tsdsize = sizeof (tsd_t);

    lm_defB = 256;

    (void) sprintf(lm_optstr, "f:");

    (void) sprintf(lm_usage,
        "       [-f file-to-dup (default %s)]\n"
        "notes: measures dup()\n",
        DEFF);

    return (0);
}

int
benchmark_optswitch(int opt, char *optarg)
{
    switch (opt) {
    case 'f':
        optf = optarg;
        break;
    default:
        return (-1);
    }
    return (0);
}

int
benchmark_initrun()
{
    (void) setfdlimit(lm_optB * lm_optT + 10);
    fd = (open(optf, O_RDONLY));

    return (0);
}

int
benchmark_initbatch(void *tsd)
{
    tsd_t           *ts = (tsd_t *)tsd;
    int         i;
    int         errors = 0;

    if (ts->ts_once++ == 0) {
        ts->ts_fds = (int *)malloc(lm_optB * sizeof (int));
        if (ts->ts_fds == NULL) {
            errors ++;
        }
        for (i = 0; i < lm_optB; i++) {
            ts->ts_fds[i] = -1;
        }
    }

    return (errors);
}

int
benchmark(void *tsd, result_t *res)
{
    tsd_t           *ts = (tsd_t *)tsd;
    int         i;

    for (i = 0; i < lm_optB; i++) {
        ts->ts_fds[i] = dup(fd);
        if (ts->ts_fds[i] == -1) {
            res->re_errors++;
        }
    }
    res->re_count = i;

    return (0);
}

int
benchmark_finibatch(void *tsd)
{
    tsd_t           *ts = (tsd_t *)tsd;
    int         i;

    for (i = 0; i < lm_optB; i++) {
        (void) close(ts->ts_fds[i]);
    }

    return (0);
}