tools/tests/libMicro/msync.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 2004 Sun Microsystems, Inc.  All rights reserved.
  28  * Use is subject to license terms.
  29  */
  30
  31 #include <sys/mman.h>
  32 #include <unistd.h>
  33 #include <stdlib.h>
  34 #include <stdio.h>
  35 #include <fcntl.h>
  36 #include <strings.h>
  37
  38 #include "libmicro.h"
  39
  40 typedef struct {
  41         char                    *ts_map;
  42         int                     ts_foo; /* defeat optimizers */
  43 } tsd_t;
  44
  45 #define DEFF                    "/dev/zero"
  46 #define DEFL                    8192
  47
  48 static char                     *optf = DEFF;
  49 static long long                optl = DEFL;
  50 static int                      optr = 0;
  51 static int                      opts = 0;
  52 static int                      optw = 0;
  53 static int                      opta = MS_SYNC;
  54 static int                      opti = 0;
  55 static int                      anon = 0;
  56 static int                      pagesize;
  57
  58 int
  59 benchmark_init()
  60 {
  61         lm_tsdsize = sizeof (tsd_t);
  62
  63         (void) sprintf(lm_optstr, "af:il:rsw");
  64
  65         (void) sprintf(lm_usage,
  66             "       [-f file-to-map (default %s)]\n"
  67             "       [-l mapping-length (default %d)]\n"
  68             "       [-r] (read a byte from each page between msyncs)\n"
  69             "       [-w] (write a byte to each page between msyncs)\n"
  70             "       [-s] (use MAP_SHARED instead of MAP_PRIVATE)\n"
  71             "       [-a (specify MS_ASYNC rather than default MS_SYNC)\n"
  72             "       [-i (specify MS_INVALIDATE)\n"
  73             "notes: measures msync()\n",
  74             DEFF, DEFL);
  75
  76         (void) sprintf(lm_header, "%8s %6s", "length", "flags");
  77
  78         return (0);
  79 }
  80
  81 int
  82 benchmark_optswitch(int opt, char *optarg)
  83 {
  84         switch (opt) {
  85         case 'a':
  86                 opta = MS_ASYNC;
  87                 break;
  88
  89         case 'f':
  90                 optf = optarg;
  91                 break;
  92
  93         case 'i':
  94                 opti = MS_INVALIDATE;
  95                 break;
  96
  97         case 'l':
  98                 optl = sizetoll(optarg);
  99                 break;
 100         case 'r':
 101                 optr = 1;
 102                 break;
 103         case 's':
 104                 opts = 1;
 105                 break;
 106         case 'w':
 107                 optw = 1;
 108                 break;
 109         default:
 110                 return (-1);
 111         }
 112
 113         pagesize = getpagesize();
 114
 115         return (0);
 116 }
 117
 118 int
 119 benchmark_initworker(void *tsd)
 120 {
 121         tsd_t                   *ts = (tsd_t *)tsd;
 122
 123         int fd;
 124
 125         if ((fd = open(optf, O_RDWR)) < 0) {
 126                 perror("open:");
 127                 return (1);
 128         }
 129
 130         (void) ftruncate(fd, optl);
 131
 132         if ((ts->ts_map = (char *)mmap(NULL, optl,
 133             PROT_READ | PROT_WRITE, opts ? MAP_SHARED : MAP_PRIVATE,
 134             fd, 0L)) == MAP_FAILED) {
 135                 perror("mmap:");
 136                 (void) close(fd);
 137                 return (1);
 138         }
 139
 140         return (0);
 141 }
 142
 143 int
 144 benchmark(void *tsd, result_t *res)
 145 {
 146         tsd_t                   *ts = (tsd_t *)tsd;
 147         int                     i, j;
 148
 149         for (i = 0; i < lm_optB; i++) {
 150
 151                 if (msync(ts->ts_map, optl, opta | opti) < 0) {
 152                         perror("msync:");
 153                         res->re_errors++;
 154                         break;
 155                 }
 156
 157                 if (optr) {
 158                         for (j = 0; j < optl; j += pagesize) {
 159                                 ts->ts_foo += ts->ts_map[j];
 160                         }
 161                 }
 162
 163                 if (optw) {
 164                         for (j = 0; j < optl; j += pagesize) {
 165                                 ts->ts_map[j] = 1;
 166                         }
 167                 }
 168         }
 169         res->re_count = i;
 170
 171         return (0);
 172 }
 173
 174 char *
 175 benchmark_result()
 176 {
 177         static char             result[256];
 178         char                    flags[6];
 179
 180         flags[0] = anon ? 'a' : '-';
 181         flags[1] = optr ? 'r' : '-';
 182         flags[2] = optw ? 'w' : '-';
 183         flags[3] = opts ? 's' : '-';
 184         flags[4] = opti ? 'i' : '-';
 185         flags[5] = 0;
 186
 187         (void) sprintf(result, "%8lld %6s", optl, flags);
 188
 189         return (result);
 190 }