xref/libmicro/memcpy.c

4049b63f8c67ada17b453463b0451ca6be3d5de4Pavel Březina/*
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4049b63f8c67ada17b453463b0451ca6be3d5de4Pavel Březina/*
c778c36c5170c2b9f1cf7a6e3b0811124534df03Jakub Hrozek * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
4049b63f8c67ada17b453463b0451ca6be3d5de4Pavel Březina * Use is subject to license terms.
c778c36c5170c2b9f1cf7a6e3b0811124534df03Jakub Hrozek */
c778c36c5170c2b9f1cf7a6e3b0811124534df03Jakub Hrozek
c778c36c5170c2b9f1cf7a6e3b0811124534df03Jakub Hrozek/*
c778c36c5170c2b9f1cf7a6e3b0811124534df03Jakub Hrozek * memcpy
c778c36c5170c2b9f1cf7a6e3b0811124534df03Jakub Hrozek */
c778c36c5170c2b9f1cf7a6e3b0811124534df03Jakub Hrozek
c778c36c5170c2b9f1cf7a6e3b0811124534df03Jakub Hrozek#include <unistd.h>
c778c36c5170c2b9f1cf7a6e3b0811124534df03Jakub Hrozek#include <stdlib.h>
c778c36c5170c2b9f1cf7a6e3b0811124534df03Jakub Hrozek#include <stdio.h>
c778c36c5170c2b9f1cf7a6e3b0811124534df03Jakub Hrozek#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 memcpy()\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) memcpy(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);
}