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