tools/tests/libMicro/apple/lmbench_read.c

   1 /*
   2  * Copyright (c) 2006 Apple Inc.  All Rights Reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28
  29
  30 #ifdef  __sun
  31 #pragma ident   "@(#)lmbench_read.c     1.5     05/08/04 Apple Inc."
  32 #endif
  33
  34
  35 #ifdef linux
  36 #define _XOPEN_SOURCE 500
  37 #endif
  38
  39 #include <unistd.h>
  40 #include <stdlib.h>
  41 #include <stdio.h>
  42 #include <fcntl.h>
  43
  44 #include "../libmicro.h"
  45
  46 typedef struct {
  47         char                    *ts_buf;
  48         int                     ts_fd;
  49 } tsd_t;
  50
  51 #define DEFF                    "/dev/zero"
  52 #define DEFS                    1024
  53
  54 static char                     *optf = DEFF;
  55 static long long                opts = DEFS;
  56 int                             optw = 0;
  57
  58 int
  59 benchmark_init()
  60 {
  61         lm_tsdsize = sizeof (tsd_t);
  62
  63         (void) sprintf(lm_optstr, "f:s:w");
  64
  65         (void) sprintf(lm_usage,
  66             "       [-f file-to-read (default %s)]\n"
  67             "       [-s buffer-size (default %d)]\n"
  68             "       [-w (store a byte to each page after read)]\n"
  69             "notes: measures lmbench_read()\n",
  70             DEFF, DEFS);
  71
  72         (void) sprintf(lm_header, "%8s", "size");
  73
  74         lm_defB = 1;
  75
  76         return (0);
  77 }
  78
  79 int
  80 benchmark_optswitch(int opt, char *optarg)
  81 {
  82         switch (opt) {
  83         case 'w':
  84                 optw = getpagesize();
  85                 break;
  86         case 'f':
  87                 optf = optarg;
  88                 break;
  89         case 's':
  90                 opts = sizetoll(optarg);
  91                 break;
  92         default:
  93                 return (-1);
  94         }
  95         return (0);
  96 }
  97
  98 int
  99 benchmark_initrun()
 100 {
 101         return (0);
 102 }
 103
 104 int
 105 benchmark_initbatch(void *tsd)
 106 {
 107         tsd_t                   *ts = (tsd_t *)tsd;
 108
 109         if (ts->ts_buf == NULL) {
 110                 ts->ts_buf = malloc(opts);
 111                 ts->ts_fd = open(optf, O_RDONLY);
 112         }
 113
 114         (void) lseek(ts->ts_fd, 0, SEEK_SET);
 115
 116         return (0);
 117 }
 118
 119 int
 120 benchmark(void *tsd, result_t *res)
 121 {
 122         tsd_t                   *ts = (tsd_t *)tsd;
 123         int                     i;
 124         int                     j;
 125 /*
 126  * The libmicro test uses a for loop as below:
 127  *   for (i = 0; i < lm_optB; i++) {
 128  *
 129  * we can probably get away with using lm_optB
 130  * in the while loop below
 131  *
 132  */
 133         i = 0;
 134
 135         while (i++ < lm_optB) {
 136                 if (read(ts->ts_fd, ts->ts_buf, opts) != opts) {
 137                         res->re_errors++;
 138                 }
 139                 if (optw)
 140                         for (j = 0; j < opts; j += optw)
 141                                 ts->ts_buf[j] = 0;
 142         }
 143         res->re_count = i;
 144
 145         return (0);
 146 }
 147
 148 char *
 149 benchmark_result()
 150 {
 151         static char             result[256];
 152
 153         (void) sprintf(result, "%8lld", opts);
 154
 155         return (result);
 156 }