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      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms
      5  * of the Common Development and Distribution License
      6  * (the "License").  You may not use this file except
      7  * in compliance with the License.
      8  *
      9  * You can obtain a copy of the license at
     10  * src/OPENSOLARIS.LICENSE
     11  * or http://www.opensolaris.org/os/licensing.
     12  * See the License for the specific language governing
     13  * permissions and limitations under the License.
     14  *
     15  * When distributing Covered Code, include this CDDL
     16  * HEADER in each file and include the License file at
     17  * usr/src/OPENSOLARIS.LICENSE.  If applicable,
     18  * add the following below this CDDL HEADER, with the
     19  * fields enclosed by brackets "[]" replaced with your
     20  * own identifying information: Portions Copyright [yyyy]
     21  * [name of copyright owner]
     22  *
     23  * CDDL HEADER END
     24  */
     25 
     26 /*
     27  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
     28  * Use is subject to license terms.
     29  */
     30 
     31 /*
     32  * memory access time check
     33  */
     34 
     35 #include <unistd.h>
     36 #include <stdlib.h>
     37 #include <stdio.h>
     38 #include <fcntl.h>
     39 #include <string.h>
     40 
     41 #include "libmicro.h"
     42 
     43 static long	opts = 1024*1024;
     44 
     45 typedef struct {
     46 	long			**ts_data;
     47 	long			ts_result;
     48 } tsd_t;
     49 
     50 int
     51 benchmark_init()
     52 {
     53 	lm_tsdsize = sizeof (tsd_t);
     54 
     55 	(void) sprintf(lm_optstr, "s:");
     56 
     57 	(void) sprintf(lm_usage,
     58 	    "       [-s size] number of bytes to "
     59 	    " access (default %ld)\n"
     60 	    "notes: measures \"random\" memory access times\n",
     61 	    opts);
     62 
     63 	(void) sprintf(lm_header, "%8s", "size");
     64 
     65 	return (0);
     66 }
     67 
     68 int
     69 benchmark_optswitch(int opt, char *optarg)
     70 {
     71 	switch (opt) {
     72 	case 's':
     73 		opts = sizetoint(optarg);
     74 		break;
     75 	default:
     76 		return (-1);
     77 	}
     78 
     79 	return (0);
     80 }
     81 
     82 int
     83 benchmark_initworker(void *tsd)
     84 {
     85 	tsd_t			*ts = (tsd_t *)tsd;
     86 	int i, j;
     87 
     88 	ts->ts_data = malloc(opts);
     89 
     90 	if (ts->ts_data == NULL) {
     91 		return (1);
     92 	}
     93 
     94 	/*
     95 	 * use lmbench style backwards stride
     96 	 */
     97 
     98 	for (i = 0; i < opts / sizeof (long); i++) {
     99 		j = i - 128;
    100 		if (j < 0)
    101 			j = j + opts / sizeof (long);
    102 		ts->ts_data[i] = (long *)&(ts->ts_data[j]);
    103 	}
    104 	return (0);
    105 }
    106 
    107 int
    108 benchmark(void *tsd, result_t *res)
    109 {
    110 	tsd_t			*ts = (tsd_t *)tsd;
    111 	int			i;
    112 
    113 	long **ptr = ts->ts_data;
    114 
    115 
    116 
    117 	for (i = 0; i < lm_optB; i += 10) {
    118 		ptr = (long **)*ptr;
    119 		ptr = (long **)*ptr;
    120 		ptr = (long **)*ptr;
    121 		ptr = (long **)*ptr;
    122 		ptr = (long **)*ptr;
    123 		ptr = (long **)*ptr;
    124 		ptr = (long **)*ptr;
    125 		ptr = (long **)*ptr;
    126 		ptr = (long **)*ptr;
    127 		ptr = (long **)*ptr;
    128 	}
    129 
    130 	ts->ts_result = (long)*ptr;
    131 
    132 	res->re_count = lm_optB;
    133 
    134 	return (0);
    135 }
    136 
    137 char *
    138 benchmark_result()
    139 {
    140 	static char  result[256];
    141 
    142 	(void) sprintf(result, "%8ld ", opts);
    143 
    144 
    145 	return (result);
    146 }
    147