child.c

   1 /*
   2    dbench version 3
   3
   4    Copyright (C) Andrew Tridgell 1999-2004
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 /* This file links against either fileio.c to do operations against a
  21    local filesystem (making dbench), or sockio.c to issue SMB-like
  22    command packets over a socket (making tbench).
  23
  24    So, the pattern of operations and the control structure is the same
  25    for both benchmarks, but the operations performed are different.
  26 */
  27
  28 #include "dbench.h"
  29
  30 #define ival(s) strtol(s, NULL, 0)
  31
  32 static void nb_target_rate(struct child_struct *child, double rate)
  33 {
  34         static double last_bytes;
  35         static struct timeval last_time;
  36         double tdelay;
  37
  38         if (last_bytes == 0) {
  39                 last_bytes = child->bytes;
  40                 last_time = timeval_current();
  41                 return;
  42         }
  43
  44         if (rate != 0) {
  45                 tdelay = (child->bytes - last_bytes)/(1.0e6*rate) - timeval_elapsed(&last_time);
  46         } else {
  47                 tdelay = - timeval_elapsed(&last_time);
  48         }
  49         if (tdelay > 0 && rate != 0) {
  50                 msleep(tdelay*1000);
  51         } else {
  52                 child->max_latency = MAX(child->max_latency, -tdelay);
  53         }
  54
  55         last_time = timeval_current();
  56         last_bytes = child->bytes;
  57 }
  58
  59 static void nb_time_reset(struct child_struct *child)
  60 {
  61         child->starttime = timeval_current();
  62 }
  63
  64 static void nb_time_delay(struct child_struct *child, double targett)
  65 {
  66         double elapsed = timeval_elapsed(&child->starttime);
  67         if (targett > elapsed) {
  68                 msleep(1000*(targett - elapsed));
  69         } else if (elapsed - targett > child->max_latency) {
  70                 child->max_latency = MAX(elapsed - targett, child->max_latency);
  71         }
  72 }
  73
  74
  75
  76 /* run a test that simulates an approximate netbench client load */
  77 void child_run(struct child_struct *child, const char *loadfile)
  78 {
  79         int i;
  80         char line[1024];
  81         char *cname;
  82         char **sparams, **params;
  83         char *p;
  84         const char *status;
  85         char *fname = NULL;
  86         char *fname2 = NULL;
  87         FILE *f = fopen(loadfile, "r");
  88         pid_t parent = getppid();
  89         double targett;
  90
  91         child->line = 0;
  92
  93         asprintf(&cname,"client%d", child->id);
  94
  95         sparams = calloc(20, sizeof(char *));
  96         for (i=0;i<20;i++) {
  97                 sparams[i] = malloc(100);
  98         }
  99
 100 again:
 101         nb_time_reset(child);
 102
 103         while (fgets(line, sizeof(line)-1, f)) {
 104                 params = sparams;
 105
 106                 if (child->done || kill(parent, 0) == -1) {
 107                         goto done;
 108                 }
 109
 110                 child->line++;
 111
 112                 line[strlen(line)-1] = 0;
 113
 114                 all_string_sub(line,"client1", cname);
 115                 all_string_sub(line,"\\", "/");
 116                 all_string_sub(line," /", " ");
 117
 118                 p = line;
 119                 for (i=0;
 120                      i<19 && next_token(&p, params[i], " ");
 121                      i++) ;
 122
 123                 params[i][0] = 0;
 124
 125                 if (i < 2 || params[0][0] == '#') continue;
 126
 127                 if (!strncmp(params[0],"SMB", 3)) {
 128                         printf("ERROR: You are using a dbench 1 load file\n");
 129                         exit(1);
 130                 }
 131
 132                 if (i > 0 && isdigit(params[0][0])) {
 133                         targett = strtod(params[0], NULL);
 134                         params++;
 135                         i--;
 136                 } else {
 137                         targett = 0.0;
 138                 }
 139
 140                 if (options.targetrate != 0 || targett == 0.0) {
 141                         nb_target_rate(child, options.targetrate);
 142                 } else {
 143                         nb_time_delay(child, targett);
 144                 }
 145                 child->lasttime = timeval_current();
 146
 147                 if (strncmp(params[i-1], "NT_STATUS_", 10) != 0 &&
 148                     strncmp(params[i-1], "0x", 2) != 0) {
 149                         printf("Badly formed status at line %d\n", child->line);
 150                         continue;
 151                 }
 152
 153                 if (fname) {
 154                         free(fname);
 155                         fname = NULL;
 156                 }
 157                 if (fname2) {
 158                         free(fname2);
 159                         fname2 = NULL;
 160                 }
 161
 162                 if (i>1 && params[1][0] == '/') {
 163                         asprintf(&fname, "%s%s", child->directory, params[1]);
 164                 }
 165                 if (i>2 && params[2][0] == '/') {
 166                         asprintf(&fname2, "%s%s", child->directory, params[2]);
 167                 }
 168
 169                 status = params[i-1];
 170
 171                 if (!strcmp(params[0],"NTCreateX")) {
 172                         nb_createx(child, fname, ival(params[2]), ival(params[3]),
 173                                    ival(params[4]), status);
 174                 } else if (!strcmp(params[0],"Close")) {
 175                         nb_close(child, ival(params[1]), status);
 176                 } else if (!strcmp(params[0],"Rename")) {
 177                         nb_rename(child, fname, fname2, status);
 178                 } else if (!strcmp(params[0],"Unlink")) {
 179                         nb_unlink(child, fname, ival(params[2]), status);
 180                 } else if (!strcmp(params[0],"Deltree")) {
 181                         nb_deltree(child, fname);
 182                 } else if (!strcmp(params[0],"Rmdir")) {
 183                         nb_rmdir(child, fname, status);
 184                 } else if (!strcmp(params[0],"Mkdir")) {
 185                         nb_mkdir(child, fname, status);
 186                 } else if (!strcmp(params[0],"QUERY_PATH_INFORMATION")) {
 187                         nb_qpathinfo(child, fname, ival(params[2]), status);
 188                 } else if (!strcmp(params[0],"QUERY_FILE_INFORMATION")) {
 189                         nb_qfileinfo(child, ival(params[1]), ival(params[2]), status);
 190                 } else if (!strcmp(params[0],"QUERY_FS_INFORMATION")) {
 191                         nb_qfsinfo(child, ival(params[1]), status);
 192                 } else if (!strcmp(params[0],"SET_FILE_INFORMATION")) {
 193                         nb_sfileinfo(child, ival(params[1]), ival(params[2]), status);
 194                 } else if (!strcmp(params[0],"FIND_FIRST")) {
 195                         nb_findfirst(child, fname, ival(params[2]),
 196                                      ival(params[3]), ival(params[4]), status);
 197                 } else if (!strcmp(params[0],"WriteX")) {
 198                         nb_writex(child, ival(params[1]),
 199                                   ival(params[2]), ival(params[3]), ival(params[4]),
 200                                   status);
 201                 } else if (!strcmp(params[0],"LockX")) {
 202                         nb_lockx(child, ival(params[1]),
 203                                  ival(params[2]), ival(params[3]), status);
 204                 } else if (!strcmp(params[0],"UnlockX")) {
 205                         nb_unlockx(child, ival(params[1]),
 206                                  ival(params[2]), ival(params[3]), status);
 207                 } else if (!strcmp(params[0],"ReadX")) {
 208                         nb_readx(child, ival(params[1]),
 209                                  ival(params[2]), ival(params[3]), ival(params[4]),
 210                                  status);
 211                 } else if (!strcmp(params[0],"Flush")) {
 212                         nb_flush(child, ival(params[1]), status);
 213                 } else if (!strcmp(params[0],"Sleep")) {
 214                         nb_sleep(child, ival(params[1]), status);
 215                 } else {
 216                         printf("[%d] Unknown operation %s\n", child->line, params[0]);
 217                 }
 218         }
 219
 220         rewind(f);
 221         goto again;
 222
 223 done:
 224         child->cleanup = 1;
 225         fclose(f);
 226         nb_cleanup(child);
 227 }