xref/libmicro/memmove.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.
 */

/*
 * memmove
 */

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

#include "libmicro.h"

#define DEFS            8192
#define DEFR            1

static long long        opts = DEFS;
static int          optf;
static int          optt;
static int          opta;

typedef struct {
    char            *ts_src;
    char            *ts_dest;
    int         ts_srcsize;
    int         ts_destsize;
} tsd_t;

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

    (void) sprintf(lm_optstr, "a:s:ft");

    (void) sprintf(lm_usage,
        "       [-s buffer-size (default %d)]\n"
        "       [-a relative alignment (default page aligned)]\n"
        "       [-f (rotate \"from\" buffer to keep it out of cache)]\n"
        "       [-t (rotate \"to\" buffer to keep it out of cache)]\n"
        "notes: measures memmove()\n",
        DEFS);

    (void) sprintf(lm_header, "%8s", "size");

    return (0);
}

int
benchmark_optswitch(int opt, char *optarg)
{
    switch (opt) {
    case 'f':
        optf++;
        break;
    case 't':
        optt++;
        break;
    case 's':
        opts = sizetoll(optarg);
        break;
    case 'a':
        opta = sizetoint(optarg);
        break;
    default:
        return (-1);
    }
    return (0);
}

int
benchmark_initworker(void *tsd)
{
    tsd_t           *ts = (tsd_t *)tsd;

    if (optf)
        ts->ts_srcsize = 64 * 1024 * 1024;
    else
        ts->ts_srcsize = opts + opta;

    if (optt)
        ts->ts_destsize = 64 * 1024 * 1024;
    else
        ts->ts_destsize = (int)opts;


    ts->ts_src = opta + (char *)valloc(ts->ts_srcsize);
    ts->ts_dest = valloc(ts->ts_destsize);

    return (0);
}

int
benchmark(void *tsd, result_t *res)
{
    tsd_t           *ts = (tsd_t *)tsd;
    int         i;
    char            *src = ts->ts_src;
    char            *dest = ts->ts_dest;

    int bump = (int)opts;

    if (bump < 1024)
        bump = 1024; /* avoid prefetched area */
    for (i = 0; i < lm_optB; i++) {
        (void) memmove(dest, src, opts);
        if (optf) {
            src += bump;
            if (src + opts > ts->ts_src + ts->ts_srcsize)
                src = ts->ts_src;
        }
        if (optt) {
            dest += bump;
            if (dest + opts > ts->ts_dest + ts->ts_destsize)
                dest = ts->ts_dest;
        }
    }

    res->re_count = i;

    return (0);
}

char *
benchmark_result()
{
    static char     result[256];

    (void) sprintf(result, "%8lld", opts);

    return (result);
}