tools/tests/libMicro/read.c

   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 #ifdef linux
  33 #define _XOPEN_SOURCE 500
  34 #endif
  35
  36 #include <unistd.h>
  37 #include <stdlib.h>
  38 #include <stdio.h>
  39 #include <fcntl.h>
  40
  41 #include "libmicro.h"
  42
  43 typedef struct {
  44         char                    *ts_buf;
  45         int                     ts_fd;
  46 } tsd_t;
  47
  48 #define DEFF                    "/dev/zero"
  49 #define DEFS                    1024
  50
  51 static char                     *optf = DEFF;
  52 static long long                opts = DEFS;
  53 int                             optw = 0;
  54
  55 int
  56 benchmark_init()
  57 {
  58         lm_tsdsize = sizeof (tsd_t);
  59
  60         (void) sprintf(lm_optstr, "f:s:w");
  61
  62         (void) sprintf(lm_usage,
  63             "       [-f file-to-read (default %s)]\n"
  64             "       [-s buffer-size (default %d)]\n"
  65             "       [-w (store a byte to each page after read)]\n"
  66             "notes: measures read()\n",
  67             DEFF, DEFS);
  68
  69         (void) sprintf(lm_header, "%8s", "size");
  70
  71         lm_defB = 1;
  72
  73         return (0);
  74 }
  75
  76 int
  77 benchmark_optswitch(int opt, char *optarg)
  78 {
  79         switch (opt) {
  80         case 'w':
  81                 optw = getpagesize();
  82                 break;
  83         case 'f':
  84                 optf = optarg;
  85                 break;
  86         case 's':
  87                 opts = sizetoll(optarg);
  88                 break;
  89         default:
  90                 return (-1);
  91         }
  92         return (0);
  93 }
  94
  95 int
  96 benchmark_initrun()
  97 {
  98         return (0);
  99 }
 100
 101 int
 102 benchmark_initbatch(void *tsd)
 103 {
 104         tsd_t                   *ts = (tsd_t *)tsd;
 105
 106         if (ts->ts_buf == NULL) {
 107                 ts->ts_buf = malloc(opts);
 108                 ts->ts_fd = open(optf, O_RDONLY);
 109         }
 110
 111         (void) lseek(ts->ts_fd, 0, SEEK_SET);
 112
 113         return (0);
 114 }
 115
 116 int
 117 benchmark(void *tsd, result_t *res)
 118 {
 119         tsd_t                   *ts = (tsd_t *)tsd;
 120         int                     i;
 121         int                     j;
 122         for (i = 0; i < lm_optB; i++) {
 123                 if (read(ts->ts_fd, ts->ts_buf, opts) != opts) {
 124                         res->re_errors++;
 125                 }
 126                 if (optw)
 127                         for (j = 0; j < opts; j += optw)
 128                                 ts->ts_buf[j] = 0;
 129         }
 130         res->re_count = i;
 131
 132         return (0);
 133 }
 134
 135 char *
 136 benchmark_result()
 137 {
 138         static char             result[256];
 139
 140         (void) sprintf(result, "%8lld", opts);
 141
 142         return (result);
 143 }