1 /* 2 * Copyright (c) International Business Machines Corp., 2001 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation; either version 2 of the License, or 7 * (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See 12 * the GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write to the Free Software 16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 19 /* FUNCTIONS: Scheduler Test Suite */ 20 21 /*---------------------------------------------------------------------+ 22 | sched_tc0 | 23 | ==================================================================== | 24 | | 25 | Description: Creates long-term disk I/O bound process | 26 | | 27 | Algorithm: o Set process priority | 28 | o Open a large file and repeatedly read from it | 29 | for a specified time duration | 30 | | 31 | To compile: cc -o sched_tc0 sched_tc0.c -L. -lpsc | 32 | | 33 | Usage: sched_tc0 [-t sec] [-p priority] [-v] [-d] | 34 | | 35 | Last update: Ver. 1.3, 4/10/94 23:04:59 | 36 | | 37 | Change Activity | 38 | | 39 | Version Date Name Reason | 40 | 0.1 050689 CTU Initial version | 41 | 0.2 010402 Manoj Iyer Ported to Linux | 42 | | 43 +---------------------------------------------------------------------*/ 44 45 #include <stdlib.h> 46 #include <sys/time.h> 47 #include <sys/resource.h> 48 #include "sched.h" 49 50 /* 51 * Defines: 52 * 53 * USAGE: usage statement 54 * 55 * DEFAULT_PRIORITY_TYPE: default priority 56 * 57 * DEFAULT_EXECUTION_TIME: default execution time (in seconds) 58 * 59 */ 60 #define DEFAULT_PRIORITY_TYPE "variable" 61 #define DEFAULT_EXECUTION_TIME 1800 62 #define USAGE "Usage: %s [-p priority] [-t sec] [-v] [-d] \n" \ 63 " -t sec execution time (default 1800 sec) \n" \ 64 " -p priority priority (default variable) \n" \ 65 " -v verbose \n" \ 66 " -d enable debugging messages \n" 67 68 /* 69 * Function prototypes: 70 * 71 * process_file: reads data file 72 * 73 * parse_args: parse command line arguments 74 */ 75 void process_file(char *); 76 void parse_args(int, char **); 77 78 /* 79 * Global variables: 80 * 81 * verbose: enable normal messages 82 * 83 * debug: enable debugging messages 84 * 85 * execution_time: testcase execution time (hours) 86 * 87 * priority: process type (fixed priority, variable priority) 88 */ 89 int verbose = 0; 90 int debug = 0; 91 long execution_time = DEFAULT_EXECUTION_TIME; 92 char *priority = DEFAULT_PRIORITY_TYPE; 93 94 /*---------------------------------------------------------------------+ 95 | main | 96 | ==================================================================== | 97 | | 98 | Function: ... | 99 | | 100 +---------------------------------------------------------------------*/ 101 int main(int argc, char **argv) 102 { 103 char *filename = NULL; 104 long start_time; /* time at start of testcase */ 105 int i; 106 107 if ((filename = getenv("KERNEL")) == NULL) { 108 errno = ENODATA; 109 sys_error("environment variable KERNEL not set", __FILE__, 110 __LINE__); 111 } 112 /* 113 * Process command line arguments... 114 */ 115 116 parse_args(argc, argv); 117 if (verbose) 118 printf("%s: Scheduler TestSuite program\n\n", *argv); 119 if (debug) { 120 printf("\tpriority: %s\n", priority); 121 printf("\texecution_time: %ld (sec)\n", execution_time); 122 } 123 124 /* 125 * Adjust the priority of this process if the real time flag is set 126 */ 127 if (!strcmp(priority, "fixed")) { 128 #ifndef __linux__ 129 if (setpri(0, DEFAULT_PRIORITY) < 0) 130 sys_error("setpri failed", __FILE__, __LINE__); 131 #else 132 if (setpriority(PRIO_PROCESS, 0, 0) < 0) 133 sys_error("setpri failed", __FILE__, __LINE__); 134 #endif 135 } 136 137 /* 138 * Continuously read through file as time permits... 139 */ 140 i = 0; 141 start_time = time(NULL); 142 143 if (debug) 144 printf("\n"); 145 while ((time(NULL) - start_time) < execution_time) { 146 if (debug) { 147 printf("\r\tprocessing file [%d], time left: %ld", 148 i++, 149 execution_time - (time(NULL) - start_time)); 150 fflush(stdout); 151 } 152 process_file(filename); 153 } 154 if (debug) 155 printf("\n"); 156 157 /* 158 * Exit with success! 159 */ 160 if (verbose) 161 printf("\nsuccessful!\n"); 162 return (0); 163 } 164 165 /*---------------------------------------------------------------------+ 166 | process_file () | 167 | ==================================================================== | 168 | | 169 | Function: Opens a file, reads from it until it encounters an | 170 | end-of-file and then closes the file.. | 171 | | 172 +---------------------------------------------------------------------*/ 173 void process_file(char *filename) 174 { 175 char record[100]; /* holds each record of the file read */ 176 FILE *datafile; /* file pointer to the open file */ 177 178 /* 179 * Try and open the datafile 180 */ 181 if ((datafile = fopen(filename, "r")) == NULL) 182 sys_error("fopen failed", __FILE__, __LINE__); 183 184 /* 185 * Read the first record of the datafile, then read until end-of-file 186 */ 187 while (fgets(record, 80, datafile)) { 188 if (feof(datafile)) 189 break; 190 } 191 192 /* 193 * Close the datafile 194 */ 195 if (fclose(datafile)) 196 sys_error("fclose failed", __FILE__, __LINE__); 197 } 198 199 /*---------------------------------------------------------------------+ 200 | parse_args () | 201 | ==================================================================== | 202 | | 203 | Function: Parse the command line arguments & initialize global | 204 | variables. | 205 | | 206 | Updates: (command line options) | 207 | | 208 | [-p] priority: "fixed" or "variable" | 209 | [-t] n: execution time in hours | 210 | [-v] verbose | 211 | [-d] enable debugging messages | 212 | | 213 +---------------------------------------------------------------------*/ 214 void parse_args(int argc, char **argv) 215 { 216 int opt; 217 int pflg = 0, tflg = 0; 218 int errflag = 0; 219 char *program_name = *argv; 220 extern char *optarg; /* Command line option */ 221 222 if (argc < 2) { 223 fprintf(stderr, USAGE, program_name); 224 exit(0); 225 } 226 227 /* 228 * Parse command line options. 229 */ 230 while ((opt = getopt(argc, argv, "p:t:vd")) != EOF) { 231 switch (opt) { 232 case 'p': /* process type */ 233 pflg++; 234 priority = optarg; 235 break; 236 case 't': /* time (hours) */ 237 tflg++; 238 execution_time = atof(optarg); 239 break; 240 case 'v': /* verbose */ 241 verbose++; 242 break; 243 case 'd': /* enable debugging messages */ 244 verbose++; 245 debug++; 246 break; 247 default: 248 errflag++; 249 break; 250 } 251 } 252 253 /* 254 * Check percentage, execution time and process slots... 255 */ 256 if (pflg) { 257 if (strcmp(priority, "fixed") && strcmp(priority, "variable")) 258 errflag++; 259 } 260 if (tflg) { 261 if (execution_time < 0.0 || execution_time > 360000) 262 errflag++; 263 } 264 if (errflag) { 265 fprintf(stderr, USAGE, program_name); 266 exit(2); 267 } 268 } 269
