Dave Shield | fe5f3db | 2002-02-06 16:44:26 +0000 | [diff] [blame] | 1 | /* |
| 2 | * vmstat_dynix.c |
| 3 | * UCD SNMP module for systemStats section of UCD-SNMP-MIB for Dynix |
| 4 | * Patrick Hess <phess@phess.best.vwh.net> |
| 5 | * |
| 6 | * This is just a port of the vmstat_solaris2 code Version 0.7 |
| 7 | * |
| 8 | */ |
| 9 | |
Wes Hardaker | 6d1f602 | 2002-04-20 07:08:20 +0000 | [diff] [blame] | 10 | /* |
| 11 | * To make lint skip the debug code and stop complaining |
| 12 | */ |
Dave Shield | fe5f3db | 2002-02-06 16:44:26 +0000 | [diff] [blame] | 13 | #ifdef __lint |
Thomas Anders | e7563bf | 2006-09-15 00:48:50 +0000 | [diff] [blame] | 14 | #define NETSNMP_NO_DEBUGGING 1 |
Dave Shield | fe5f3db | 2002-02-06 16:44:26 +0000 | [diff] [blame] | 15 | #endif |
| 16 | |
| 17 | #define __NO_ASM_MACRO 1 |
| 18 | |
Wes Hardaker | 6d1f602 | 2002-04-20 07:08:20 +0000 | [diff] [blame] | 19 | /* |
| 20 | * Includes start here |
| 21 | */ |
Dave Shield | 7437a30 | 2002-07-16 15:48:49 +0000 | [diff] [blame] | 22 | #include <net-snmp/net-snmp-config.h> |
Dave Shield | fe5f3db | 2002-02-06 16:44:26 +0000 | [diff] [blame] | 23 | |
Wes Hardaker | 6d1f602 | 2002-04-20 07:08:20 +0000 | [diff] [blame] | 24 | /* |
| 25 | * Standard includes |
| 26 | */ |
Dave Shield | fe5f3db | 2002-02-06 16:44:26 +0000 | [diff] [blame] | 27 | #include <sys/tmp_ctl.h> |
| 28 | #include <sys/sysperf.h> |
| 29 | #include <sys/vmmeter.h> |
| 30 | #include <unistd.h> |
| 31 | #include <string.h> |
Wes Hardaker | 6d1f602 | 2002-04-20 07:08:20 +0000 | [diff] [blame] | 32 | |
Dave Shield | 1f17c99 | 2002-02-08 15:45:13 +0000 | [diff] [blame] | 33 | #include <net-snmp/net-snmp-includes.h> |
| 34 | #include <net-snmp/agent/net-snmp-agent-includes.h> |
Dave Shield | fe5f3db | 2002-02-06 16:44:26 +0000 | [diff] [blame] | 35 | |
Dave Shield | fe5f3db | 2002-02-06 16:44:26 +0000 | [diff] [blame] | 36 | #include "mibdefs.h" |
Magnus Fromreide | 610d95f | 2008-05-20 23:00:28 +0000 | [diff] [blame] | 37 | #include "util_funcs/header_generic.h" |
Dave Shield | fe5f3db | 2002-02-06 16:44:26 +0000 | [diff] [blame] | 38 | |
Wes Hardaker | 6d1f602 | 2002-04-20 07:08:20 +0000 | [diff] [blame] | 39 | /* |
| 40 | * Header file for this module |
| 41 | */ |
Dave Shield | fe5f3db | 2002-02-06 16:44:26 +0000 | [diff] [blame] | 42 | #include "vmstat.h" |
| 43 | #include "vmstat_dynix.h" |
| 44 | |
Wes Hardaker | 6d1f602 | 2002-04-20 07:08:20 +0000 | [diff] [blame] | 45 | /* |
| 46 | * Includes end here |
| 47 | */ |
Dave Shield | fe5f3db | 2002-02-06 16:44:26 +0000 | [diff] [blame] | 48 | |
| 49 | |
Wes Hardaker | 6d1f602 | 2002-04-20 07:08:20 +0000 | [diff] [blame] | 50 | /* |
| 51 | * Global structures start here |
| 52 | */ |
Dave Shield | fe5f3db | 2002-02-06 16:44:26 +0000 | [diff] [blame] | 53 | |
Wes Hardaker | 6d1f602 | 2002-04-20 07:08:20 +0000 | [diff] [blame] | 54 | /* |
| 55 | * A structure to save data gathered from the kernel kstat interface to. |
| 56 | */ |
| 57 | /* |
| 58 | * We used to have the sys/sysinfo.h cpu_stat_t here but we did not need |
| 59 | */ |
| 60 | /* |
| 61 | * all of it, some in a different size and some additional ones so we build |
| 62 | */ |
| 63 | /* |
| 64 | * our own |
| 65 | */ |
| 66 | struct cpu_stat_snapshot { |
| 67 | time_t css_time; |
| 68 | unsigned int css_cpus; |
| 69 | unsigned long long css_swapin; |
| 70 | unsigned long long css_swapout; |
| 71 | unsigned long long css_blocks_read; |
| 72 | unsigned long long css_blocks_write; |
| 73 | unsigned long long css_interrupts; |
| 74 | unsigned long long css_context_sw; |
| 75 | unsigned long long css_cpu[V_CPU_STATES]; |
Dave Shield | fe5f3db | 2002-02-06 16:44:26 +0000 | [diff] [blame] | 76 | }; |
Wes Hardaker | 6d1f602 | 2002-04-20 07:08:20 +0000 | [diff] [blame] | 77 | |
| 78 | /* |
| 79 | * Global structures end here |
| 80 | */ |
Dave Shield | fe5f3db | 2002-02-06 16:44:26 +0000 | [diff] [blame] | 81 | |
| 82 | |
Wes Hardaker | 6d1f602 | 2002-04-20 07:08:20 +0000 | [diff] [blame] | 83 | /* |
| 84 | * Global variables start here |
| 85 | */ |
Dave Shield | fe5f3db | 2002-02-06 16:44:26 +0000 | [diff] [blame] | 86 | |
Wes Hardaker | 6d1f602 | 2002-04-20 07:08:20 +0000 | [diff] [blame] | 87 | /* |
| 88 | * Variables for the calculated values, filled in update_stats |
| 89 | */ |
| 90 | /* |
| 91 | * Need to be global since we need them in more than one function |
| 92 | */ |
| 93 | static ulong swapin; |
| 94 | static ulong swapout; |
| 95 | static ulong blocks_read; |
| 96 | static ulong blocks_write; |
| 97 | static ulong interrupts; |
| 98 | static ulong context_sw; |
Dave Shield | fe5f3db | 2002-02-06 16:44:26 +0000 | [diff] [blame] | 99 | |
Wes Hardaker | 6d1f602 | 2002-04-20 07:08:20 +0000 | [diff] [blame] | 100 | /* |
| 101 | * Since MIB wants V_CPU_SYSTEM, which is V_CPU_KERNEL + V_CPU_STREAM |
| 102 | */ |
| 103 | static long cpu_perc[V_CPU_STATES + 1]; |
Dave Shield | fe5f3db | 2002-02-06 16:44:26 +0000 | [diff] [blame] | 104 | |
Wes Hardaker | 6d1f602 | 2002-04-20 07:08:20 +0000 | [diff] [blame] | 105 | /* |
| 106 | * How many snapshots we have already taken, needed for the first |
| 107 | */ |
| 108 | /* |
| 109 | * POLL_INTERVAL * POLL_VALUES seconds of agent running |
| 110 | */ |
Dave Shield | fe5f3db | 2002-02-06 16:44:26 +0000 | [diff] [blame] | 111 | static unsigned int number_of_snapshots; |
| 112 | |
Wes Hardaker | 6d1f602 | 2002-04-20 07:08:20 +0000 | [diff] [blame] | 113 | /* |
| 114 | * The place to store the snapshots of system data in |
| 115 | */ |
| 116 | static struct cpu_stat_snapshot snapshot[POLL_VALUES + 1]; |
Dave Shield | fe5f3db | 2002-02-06 16:44:26 +0000 | [diff] [blame] | 117 | |
Wes Hardaker | 6d1f602 | 2002-04-20 07:08:20 +0000 | [diff] [blame] | 118 | /* |
| 119 | * And one for the raw counters, which we fill when the raw values are |
| 120 | */ |
| 121 | /* |
| 122 | * requested, as opposed to the absolute values, which are taken every |
| 123 | */ |
| 124 | /* |
| 125 | * POLL_INTERVAL seconds and calculated over POLL_INTERVAL * POLL_VALUES time |
| 126 | */ |
Dave Shield | fe5f3db | 2002-02-06 16:44:26 +0000 | [diff] [blame] | 127 | static struct cpu_stat_snapshot raw_values; |
| 128 | |
Wes Hardaker | 6d1f602 | 2002-04-20 07:08:20 +0000 | [diff] [blame] | 129 | /* |
| 130 | * Global variables end here |
| 131 | */ |
Dave Shield | fe5f3db | 2002-02-06 16:44:26 +0000 | [diff] [blame] | 132 | |
| 133 | |
Wes Hardaker | 6d1f602 | 2002-04-20 07:08:20 +0000 | [diff] [blame] | 134 | /* |
| 135 | * Functions start here |
| 136 | */ |
Dave Shield | fe5f3db | 2002-02-06 16:44:26 +0000 | [diff] [blame] | 137 | |
Wes Hardaker | 6d1f602 | 2002-04-20 07:08:20 +0000 | [diff] [blame] | 138 | /* |
| 139 | * Function prototype |
| 140 | */ |
| 141 | static void update_stats(unsigned int registrationNumber, |
| 142 | void *clientarg); |
| 143 | static int take_snapshot(struct cpu_stat_snapshot *css); |
Dave Shield | fe5f3db | 2002-02-06 16:44:26 +0000 | [diff] [blame] | 144 | |
Wes Hardaker | 6d1f602 | 2002-04-20 07:08:20 +0000 | [diff] [blame] | 145 | /* |
| 146 | * init_vmstat_dynix starts here |
| 147 | */ |
| 148 | /* |
| 149 | * Init function for this module, from prototype |
| 150 | */ |
| 151 | /* |
| 152 | * Defines variables handled by this module, defines root OID for |
| 153 | */ |
| 154 | /* |
| 155 | * this module and registers it with the agent |
| 156 | */ |
Dave Shield | fe5f3db | 2002-02-06 16:44:26 +0000 | [diff] [blame] | 157 | |
Dave Shield | 9fbc4a3 | 2002-05-23 08:39:41 +0000 | [diff] [blame] | 158 | FindVarMethod var_extensible_vmstat; |
Dave Shield | fe5f3db | 2002-02-06 16:44:26 +0000 | [diff] [blame] | 159 | |
Wes Hardaker | 6d1f602 | 2002-04-20 07:08:20 +0000 | [diff] [blame] | 160 | void |
| 161 | init_vmstat_dynix(void) |
Dave Shield | fe5f3db | 2002-02-06 16:44:26 +0000 | [diff] [blame] | 162 | { |
Wes Hardaker | 6d1f602 | 2002-04-20 07:08:20 +0000 | [diff] [blame] | 163 | |
Dave Shield | fe5f3db | 2002-02-06 16:44:26 +0000 | [diff] [blame] | 164 | /* |
Wes Hardaker | 6d1f602 | 2002-04-20 07:08:20 +0000 | [diff] [blame] | 165 | * Which variables do we service ? |
| 166 | */ |
| 167 | struct variable2 extensible_vmstat_variables[] = { |
Magnus Fromreide | 2e597ff | 2008-10-21 21:10:43 +0000 | [diff] [blame] | 168 | {MIBINDEX, ASN_INTEGER, NETSNMP_OLDAPI_RONLY, |
| 169 | var_extensible_vmstat, 1, {MIBINDEX}}, |
| 170 | {ERRORNAME, ASN_OCTET_STR, NETSNMP_OLDAPI_RONLY, |
| 171 | var_extensible_vmstat, 1, {ERRORNAME}}, |
| 172 | {SWAPIN, ASN_INTEGER, NETSNMP_OLDAPI_RONLY, |
| 173 | var_extensible_vmstat, 1, {SWAPIN}}, |
| 174 | {SWAPOUT, ASN_INTEGER, NETSNMP_OLDAPI_RONLY, |
| 175 | var_extensible_vmstat, 1, {SWAPOUT}}, |
| 176 | {IOSENT, ASN_INTEGER, NETSNMP_OLDAPI_RONLY, |
| 177 | var_extensible_vmstat, 1, {IOSENT}}, |
| 178 | {IORECEIVE, ASN_INTEGER, NETSNMP_OLDAPI_RONLY, |
| 179 | var_extensible_vmstat, 1, {IORECEIVE}}, |
| 180 | {SYSINTERRUPTS, ASN_INTEGER, NETSNMP_OLDAPI_RONLY, |
| 181 | var_extensible_vmstat, 1, {SYSINTERRUPTS}}, |
| 182 | {SYSCONTEXT, ASN_INTEGER, NETSNMP_OLDAPI_RONLY, |
| 183 | var_extensible_vmstat, 1, {SYSCONTEXT}}, |
| 184 | {CPUUSER, ASN_INTEGER, NETSNMP_OLDAPI_RONLY, |
| 185 | var_extensible_vmstat, 1, {CPUUSER}}, |
| 186 | {CPUSYSTEM, ASN_INTEGER, NETSNMP_OLDAPI_RONLY, |
| 187 | var_extensible_vmstat, 1, {CPUSYSTEM}}, |
| 188 | {CPUIDLE, ASN_INTEGER, NETSNMP_OLDAPI_RONLY, |
| 189 | var_extensible_vmstat, 1, {CPUIDLE}}, |
| 190 | {CPURAWUSER, ASN_COUNTER, NETSNMP_OLDAPI_RONLY, |
| 191 | var_extensible_vmstat, 1, {CPURAWUSER}}, |
| 192 | {CPURAWSYSTEM, ASN_COUNTER, NETSNMP_OLDAPI_RONLY, |
| 193 | var_extensible_vmstat, 1, {CPURAWSYSTEM}}, |
| 194 | {CPURAWIDLE, ASN_COUNTER, NETSNMP_OLDAPI_RONLY, |
| 195 | var_extensible_vmstat, 1, {CPURAWIDLE}}, |
| 196 | {CPURAWWAIT, ASN_COUNTER, NETSNMP_OLDAPI_RONLY, |
| 197 | var_extensible_vmstat, 1, {CPURAWWAIT}}, |
| 198 | {CPURAWKERNEL, ASN_COUNTER, NETSNMP_OLDAPI_RONLY, |
| 199 | var_extensible_vmstat, 1, {CPURAWKERNEL}}, |
| 200 | {IORAWSENT, ASN_COUNTER, NETSNMP_OLDAPI_RONLY, |
| 201 | var_extensible_vmstat, 1, {IORAWSENT}}, |
| 202 | {IORAWRECEIVE, ASN_COUNTER, NETSNMP_OLDAPI_RONLY, |
| 203 | var_extensible_vmstat, 1, {IORAWRECEIVE}}, |
Wes Hardaker | 6d1f602 | 2002-04-20 07:08:20 +0000 | [diff] [blame] | 204 | /* |
| 205 | * Future use: |
| 206 | */ |
| 207 | /* |
Magnus Fromreide | 2e597ff | 2008-10-21 21:10:43 +0000 | [diff] [blame] | 208 | * {ERRORFLAG, ASN_INTEGER, NETSNMP_OLDAPI_RONLY, |
| 209 | * var_extensible_vmstat, 1, {ERRORFLAG }}, |
| 210 | * {ERRORMSG, ASN_OCTET_STR, NETSNMP_OLDAPI_RONLY, |
| 211 | * var_extensible_vmstat, 1, {ERRORMSG }} |
Wes Hardaker | 6d1f602 | 2002-04-20 07:08:20 +0000 | [diff] [blame] | 212 | */ |
| 213 | }; |
Dave Shield | fe5f3db | 2002-02-06 16:44:26 +0000 | [diff] [blame] | 214 | |
Dave Shield | fe5f3db | 2002-02-06 16:44:26 +0000 | [diff] [blame] | 215 | /* |
Wes Hardaker | 6d1f602 | 2002-04-20 07:08:20 +0000 | [diff] [blame] | 216 | * Define the OID pointer to the top of the mib tree that we're |
| 217 | */ |
| 218 | /* |
| 219 | * registering underneath |
| 220 | */ |
Thomas Anders | e7563bf | 2006-09-15 00:48:50 +0000 | [diff] [blame] | 221 | oid vmstat_variables_oid[] = { NETSNMP_UCDAVIS_MIB, 11 }; |
Dave Shield | fe5f3db | 2002-02-06 16:44:26 +0000 | [diff] [blame] | 222 | |
Wes Hardaker | 6d1f602 | 2002-04-20 07:08:20 +0000 | [diff] [blame] | 223 | /* |
| 224 | * register ourselves with the agent to handle our mib tree |
| 225 | */ |
| 226 | /* |
| 227 | * LINTED Trust me, I know what I'm doing |
| 228 | */ |
| 229 | REGISTER_MIB("ucd-snmp/vmstat", extensible_vmstat_variables, variable2, |
| 230 | vmstat_variables_oid); |
Dave Shield | fe5f3db | 2002-02-06 16:44:26 +0000 | [diff] [blame] | 231 | |
Wes Hardaker | 6d1f602 | 2002-04-20 07:08:20 +0000 | [diff] [blame] | 232 | /* |
| 233 | * Start with some useful data |
| 234 | */ |
| 235 | update_stats(0, NULL); |
| 236 | |
| 237 | /* |
| 238 | * update_stats is run every POLL_INTERVAL seconds using this routine |
| 239 | */ |
| 240 | /* |
| 241 | * (see 'man snmp_alarm') |
| 242 | */ |
| 243 | /* |
| 244 | * This is only executed once to get some useful data in the beginning |
| 245 | */ |
| 246 | if (snmp_alarm_register(5, NULL, update_stats, NULL) == 0) { |
| 247 | snmp_log(LOG_WARNING, |
| 248 | "vmstat_dynix (init): snmp_alarm_register failed.\n"); |
| 249 | } |
| 250 | /* |
| 251 | * This is the one that runs update_stats every POLL_INTERVAL seconds |
| 252 | */ |
| 253 | if (snmp_alarm_register(POLL_INTERVAL, SA_REPEAT, update_stats, NULL) |
| 254 | == 0) { |
| 255 | snmp_log(LOG_ERR, |
| 256 | "vmstat_dynix (init): snmp_alarm_register failed, cannot service requests.\n"); |
| 257 | } |
| 258 | |
| 259 | } /* init_vmstat_dynix ends here */ |
| 260 | |
| 261 | /* |
| 262 | * Data collection function take_snapshot starts here |
| 263 | */ |
| 264 | /* |
| 265 | * Get data from kernel and save into the snapshot strutcs |
| 266 | */ |
| 267 | /* |
| 268 | * Argument is the snapshot struct to save to. Global anyway, but looks nicer |
| 269 | */ |
| 270 | static int |
| 271 | take_snapshot(struct cpu_stat_snapshot *css) |
| 272 | { |
| 273 | /* |
| 274 | * Variables start here |
| 275 | */ |
| 276 | |
| 277 | /* |
| 278 | * Counters |
| 279 | */ |
| 280 | unsigned int cpu_num = 0; |
| 281 | |
| 282 | /* |
| 283 | * Low resolution time counter |
| 284 | */ |
| 285 | time_t current_time; |
| 286 | |
| 287 | /* |
| 288 | * see sys/sysperf.h, holds CPU data |
| 289 | */ |
| 290 | exp_vmmeter_t *cs, *origcs = 0; |
| 291 | |
| 292 | /* |
| 293 | * size of the cs struct |
| 294 | */ |
| 295 | size_t vminfo_size; |
| 296 | |
| 297 | /* |
| 298 | * The usual stuff to count on, err, by |
| 299 | */ |
| 300 | int i; |
| 301 | int engnum = 0; |
| 302 | |
| 303 | /* |
| 304 | * Variables end here |
| 305 | */ |
| 306 | |
| 307 | /* |
| 308 | * Function starts here |
| 309 | */ |
| 310 | |
| 311 | /* |
| 312 | * Get time |
| 313 | */ |
| 314 | current_time = time(0); |
| 315 | |
| 316 | /* |
| 317 | * If we have just gotten the data, return the values from last run (skip if-clause) |
| 318 | */ |
| 319 | /* |
| 320 | * This happens on a snmpwalk request. |
| 321 | */ |
| 322 | /* |
| 323 | * if we just did it less than 2 seconds ago |
| 324 | */ |
| 325 | /* |
| 326 | * Jumps into if-clause either when snapshot is empty or when too old |
| 327 | */ |
| 328 | |
| 329 | if ((css->css_time == 0) || (current_time > css->css_time + 2)) { |
| 330 | /* |
| 331 | * Make sure we clean up before we put new data into snapshot |
| 332 | */ |
| 333 | memset(css, 0, sizeof *css); |
| 334 | |
| 335 | /* |
| 336 | * Get the number of CPUs we gather data from |
| 337 | */ |
| 338 | if ((cpu_num = tmp_ctl(TMP_NENG, 0)) < 0) { |
| 339 | snmp_log(LOG_ERR, |
| 340 | "vmstat_dynix: (take snapshot) bad tmp_ctl return\n"); |
| 341 | return (-1); |
| 342 | } |
| 343 | css->css_cpus = cpu_num; |
| 344 | |
| 345 | vminfo_size = cpu_num * sizeof(exp_vmmeter_t); |
| 346 | |
| 347 | if (!(cs = (exp_vmmeter_t *) malloc(vminfo_size))) { |
| 348 | snmp_log(LOG_ERR, |
| 349 | "vmstat_dynix: (take_snapshot) bad malloc return\n"); |
| 350 | return (-1); |
| 351 | } |
| 352 | origcs = cs; |
| 353 | |
| 354 | /* |
| 355 | * Update timer |
| 356 | */ |
| 357 | css->css_time = current_time; |
| 358 | |
| 359 | /* |
| 360 | * Read data from kernel into cs structure |
| 361 | */ |
| 362 | /* |
| 363 | * cs is the buffer we are writing to and |
| 364 | */ |
| 365 | /* |
| 366 | * vminfo_size is the size of the cs struct |
| 367 | */ |
| 368 | if ((getkerndata(VMMETER_DATAID, cs, vminfo_size)) < 0) { |
| 369 | snmp_log(LOG_ERR, |
| 370 | "vmstat_dynix (take_snapshot): getkerndata failure."); |
| 371 | return (-1); |
| 372 | } |
| 373 | |
| 374 | /* |
| 375 | * Get the data from each CPU |
| 376 | */ |
| 377 | /* |
| 378 | * We walk through the whole vmmeter struct and sum up all the found stats, |
| 379 | */ |
| 380 | /* |
| 381 | * there's one for every CPU in a machine |
| 382 | */ |
| 383 | /* |
| 384 | * Okay... you can't laugh at this! I'm a C-hack, not a C-coder. :) |
| 385 | */ |
| 386 | while (engnum < cpu_num) { |
| 387 | |
| 388 | /* |
| 389 | * Get the data from the cs structure and sum it up in our own structure |
| 390 | */ |
| 391 | css->css_swapin += (unsigned long long) cs->v_swpin; |
| 392 | css->css_swapout += (unsigned long long) cs->v_swpout; |
| 393 | css->css_blocks_read += (unsigned long long) cs->v_phread; |
| 394 | css->css_blocks_write += (unsigned long long) cs->v_phwrite; |
| 395 | css->css_interrupts += (unsigned long long) cs->v_intr; |
| 396 | css->css_context_sw += (unsigned long long) cs->v_swtch; |
| 397 | |
| 398 | /* |
| 399 | * We need a for-loop for the CPU STATE values |
| 400 | */ |
| 401 | for (i = 0; i < V_CPU_STATES; i++) { |
| 402 | css->css_cpu[i] += (unsigned long long) cs->v_time[i]; |
| 403 | } /* end for */ |
| 404 | |
| 405 | cs++; |
| 406 | engnum++; |
| 407 | } /* end while */ |
| 408 | } |
| 409 | |
| 410 | free((void *) origcs); |
| 411 | |
| 412 | /* |
| 413 | * All engines running at warp speed, no problems (if there are any engines, that is) |
| 414 | */ |
| 415 | return (cpu_num > 0 ? 0 : -1); |
| 416 | } /* take_snapshot ends here */ |
| 417 | |
| 418 | /* |
| 419 | * This gets called every POLL_INTERVAL seconds to update the snapshots. It takes a new snapshot and |
| 420 | */ |
| 421 | /* |
| 422 | * drops the oldest one. This way we move the time window so we always take the values over |
| 423 | */ |
| 424 | /* |
| 425 | * POLL_INTERVAL * POLL_VALUES seconds and update the data used every POLL_INTERVAL seconds |
| 426 | */ |
| 427 | /* |
| 428 | * The alarm timer is in the init function of this module (snmp_alarm_register) |
| 429 | */ |
| 430 | /* |
| 431 | * ARGSUSED0 |
| 432 | */ |
| 433 | static void |
| 434 | update_stats(unsigned int registrationNumber, void *clientarg) |
| 435 | { |
| 436 | /* |
| 437 | * The time between the samples we compare |
| 438 | */ |
| 439 | time_t time_diff; |
| 440 | |
| 441 | /* |
| 442 | * Easier to use these than the snapshots, short hand pointers |
| 443 | */ |
| 444 | struct cpu_stat_snapshot *css_old, *css_new; |
| 445 | |
| 446 | /* |
| 447 | * The usual stuff to count on, err, by |
| 448 | */ |
| 449 | int i; |
| 450 | |
| 451 | /* |
| 452 | * The sum of the CPU ticks that have passed on the different CPU states, so we can calculate |
| 453 | */ |
| 454 | /* |
| 455 | * the percentages of each state |
| 456 | */ |
| 457 | unsigned long long cpu_sum = 0; |
| 458 | |
| 459 | DEBUGMSGTL(("ucd-snmp/vmstat_dynix.c:update_stats", |
| 460 | "updating stats\n")); |
| 461 | |
| 462 | /* |
| 463 | * Take the current snapshot |
| 464 | */ |
| 465 | if (take_snapshot(&snapshot[0]) == -1) { |
| 466 | snmp_log(LOG_WARNING, |
| 467 | "vmstat_dynix (update_stats): Something went wrong with take_snapshot."); |
| 468 | return; |
| 469 | } |
| 470 | |
| 471 | /* |
| 472 | * Do we have some data we can use ? An issue right after the start of the agent |
| 473 | */ |
| 474 | if (number_of_snapshots > 0) { |
| 475 | /* |
| 476 | * Huh, the number of CPUs changed during run time. That is indeed s.th. worth noting, we |
| 477 | */ |
| 478 | /* |
| 479 | * output a humorous (more or less) syslog message and need to retake the snapshots |
| 480 | */ |
| 481 | if (snapshot[0].css_cpus != snapshot[1].css_cpus) { |
| 482 | if (snapshot[0].css_cpus > snapshot[1].css_cpus) { |
| 483 | snmp_log(LOG_NOTICE, |
| 484 | "vmstat_dynix (update_stats): Cool ! Number of CPUs increased, must be hot-pluggable."); |
| 485 | } else { |
| 486 | snmp_log(LOG_NOTICE, |
| 487 | "vmstat_dynix (update_stats): Lost at least one CPU, RIP."); |
| 488 | } |
| 489 | /* |
| 490 | * Make all snapshots but the current one invalid |
| 491 | */ |
| 492 | number_of_snapshots = 1; |
| 493 | /* |
| 494 | * Move the current one in the "first" [1] slot |
| 495 | */ |
| 496 | memmove(&snapshot[1], &snapshot[0], sizeof snapshot[0]); |
| 497 | /* |
| 498 | * Erase the current one |
| 499 | */ |
| 500 | memset(&snapshot[0], 0, sizeof snapshot[0]); |
| 501 | /* |
| 502 | * Try to get a new snapshot in five seconds so we can return s.th. useful |
| 503 | */ |
| 504 | if (snmp_alarm_register(5, NULL, update_stats, NULL) == 0) { |
| 505 | snmp_log(LOG_WARNING, |
| 506 | "vmstat_dynix (update_stats): snmp_alarm_register failed.\n"); |
| 507 | } |
| 508 | return; |
| 509 | } |
| 510 | |
| 511 | /* |
| 512 | * Short hand pointers |
| 513 | */ |
| 514 | css_new = &snapshot[0]; |
| 515 | css_old = &snapshot[number_of_snapshots]; |
| 516 | |
| 517 | /* |
| 518 | * How much time has passed between the snapshots we get the values from ? |
| 519 | */ |
| 520 | /* |
| 521 | * Time is in seconds |
| 522 | */ |
| 523 | time_diff = |
| 524 | snapshot[0].css_time - snapshot[number_of_snapshots].css_time; |
| 525 | |
| 526 | if (time_diff == 0) |
| 527 | DEBUGMSGTL(("ucd-snmp/vmstat_dynix.c:update_stats", |
| 528 | "time_diff is ZERO... watch for the segfault\n")); |
| 529 | |
| 530 | DEBUGMSGTL(("ucd-snmp/vmstat_dynix.c:update_stats", |
| 531 | "time_diff: %lld\n", time_diff)); |
| 532 | |
| 533 | /* |
| 534 | * swapin and swapout are in pages, MIB wants kB/s,so we just need to get kB and seconds |
| 535 | */ |
| 536 | /* |
| 537 | * For the others we need to get value per second |
| 538 | */ |
| 539 | /* |
| 540 | * decided to use sysconf(_SC_PAGESIZE) instead to get around an #ifndef (I don't like those) |
| 541 | */ |
| 542 | /* |
| 543 | * LINTED cast needed, really |
| 544 | */ |
| 545 | swapin = |
| 546 | (uint_t) ((css_new->css_swapin - |
| 547 | css_old->css_swapin) * (time_t) 1000 * |
| 548 | sysconf(_SC_PAGESIZE) / 1024 / time_diff); |
| 549 | /* |
| 550 | * LINTED cast needed, really |
| 551 | */ |
| 552 | swapout = |
| 553 | (uint_t) ((css_new->css_swapout - |
| 554 | css_old->css_swapout) * (time_t) 1000 * |
| 555 | sysconf(_SC_PAGESIZE) / 1024 / time_diff); |
| 556 | /* |
| 557 | * LINTED cast needed, really |
| 558 | */ |
| 559 | blocks_read = |
| 560 | (uint_t) ((css_new->css_blocks_read - |
| 561 | css_old->css_blocks_read) * (time_t) 1000 / |
| 562 | time_diff); |
| 563 | /* |
| 564 | * LINTED cast needed, really |
| 565 | */ |
| 566 | blocks_write = |
| 567 | (uint_t) ((css_new->css_blocks_write - |
| 568 | css_old->css_blocks_write) * (time_t) 1000 / |
| 569 | time_diff); |
| 570 | /* |
| 571 | * LINTED cast needed, really |
| 572 | */ |
| 573 | interrupts = |
| 574 | (uint_t) ((css_new->css_interrupts - |
| 575 | css_old->css_interrupts) * (time_t) 1000 / |
| 576 | time_diff); |
| 577 | /* |
| 578 | * LINTED cast needed, really |
| 579 | */ |
| 580 | context_sw = |
| 581 | (uint_t) ((css_new->css_context_sw - |
| 582 | css_old->css_context_sw) * (time_t) 1000 / |
| 583 | time_diff); |
| 584 | |
| 585 | /* |
| 586 | * Loop thru all the V_CPU_STATES and get the differences |
| 587 | */ |
| 588 | for (i = 0; i < V_CPU_STATES; i++) { |
| 589 | cpu_sum += (css_new->css_cpu[i] - css_old->css_cpu[i]); |
| 590 | } |
| 591 | |
| 592 | /* |
| 593 | * Now calculate the absolute percentage values |
| 594 | */ |
| 595 | /* |
| 596 | * Looks somewhat complicated sometimes but tries to get around using floats to increase speed |
| 597 | */ |
| 598 | for (i = 0; i < V_CPU_STATES; i++) { |
| 599 | /* |
| 600 | * Since we don't return fractions we use + 0.5 to get between 99 and 101 percent adding the values |
| 601 | */ |
| 602 | /* |
| 603 | * together, otherwise we would get less than 100 most of the time |
| 604 | */ |
| 605 | /* |
| 606 | * LINTED has to be 'long' |
| 607 | */ |
| 608 | cpu_perc[i] = |
| 609 | (long) (((css_new->css_cpu[i] - |
| 610 | css_old->css_cpu[i]) * 100 + |
| 611 | (cpu_sum / 2)) / cpu_sum); |
| 612 | } |
| 613 | |
| 614 | /* |
| 615 | * As said before, MIB wants V_CPU_SYSTEM which is V_CPU_KERNEL + V_CPU_STREAM |
| 616 | */ |
| 617 | /* |
| 618 | * LINTED has to be 'long' |
| 619 | */ |
| 620 | cpu_perc[V_CPU_SYSTEM] = |
| 621 | (long) ((((css_new->css_cpu[V_CPU_KERNEL] - |
| 622 | css_old->css_cpu[V_CPU_KERNEL]) |
| 623 | + (css_new->css_cpu[V_CPU_STREAM] - |
| 624 | css_old->css_cpu[V_CPU_STREAM])) |
| 625 | * 100 + (cpu_sum / 2)) / cpu_sum); |
| 626 | } |
| 627 | |
| 628 | /* |
| 629 | * Make the current one the first one and move the whole thing one place down |
| 630 | */ |
| 631 | memmove(&snapshot[1], &snapshot[0], |
| 632 | (size_t) (((char *) &snapshot[POLL_VALUES]) - |
| 633 | ((char *) &snapshot[0]))); |
| 634 | |
| 635 | /* |
| 636 | * Erase the current one |
| 637 | */ |
| 638 | memset(&snapshot[0], 0, sizeof snapshot[0]); |
| 639 | |
| 640 | /* |
| 641 | * Only important on start up, we keep track of how many snapshots we have taken so far |
| 642 | */ |
| 643 | if (number_of_snapshots < POLL_VALUES) { |
| 644 | number_of_snapshots++; |
| 645 | } |
| 646 | } /* update_stats ends here */ |
| 647 | |
| 648 | /* |
| 649 | * *var_extensible_vmstat starts here |
| 650 | */ |
| 651 | /* |
| 652 | * The guts of the module, this routine gets called to service a request |
| 653 | */ |
Dave Shield | 9fbc4a3 | 2002-05-23 08:39:41 +0000 | [diff] [blame] | 654 | unsigned char * |
Wes Hardaker | 6d1f602 | 2002-04-20 07:08:20 +0000 | [diff] [blame] | 655 | var_extensible_vmstat(struct variable *vp, |
| 656 | oid * name, |
| 657 | size_t * length, |
| 658 | int exact, |
| 659 | size_t * var_len, WriteMethod ** write_method) |
| 660 | { |
| 661 | /* |
| 662 | * Needed for returning the values |
| 663 | */ |
| 664 | static long long_ret; |
| 665 | static char errmsg[300]; |
| 666 | |
| 667 | /* |
| 668 | * set to 0 as default |
| 669 | */ |
| 670 | long_ret = 0; |
| 671 | |
| 672 | /* |
| 673 | * generic check whether the options passed make sense and whether the |
| 674 | */ |
| 675 | /* |
| 676 | * right variable is requested |
| 677 | */ |
| 678 | if (header_generic(vp, name, length, exact, var_len, write_method) != |
| 679 | MATCH_SUCCEEDED) { |
| 680 | return (NULL); |
| 681 | } |
| 682 | |
| 683 | /* |
| 684 | * The function that actually returns s.th. |
| 685 | */ |
| 686 | switch (vp->magic) { |
| 687 | case MIBINDEX: |
| 688 | long_ret = 1; |
| 689 | return ((u_char *) (&long_ret)); |
| 690 | case ERRORNAME: /* dummy name */ |
| 691 | sprintf(errmsg, "systemStats"); |
| 692 | *var_len = strlen(errmsg); |
| 693 | return ((u_char *) (errmsg)); |
| 694 | case SWAPIN: |
| 695 | return ((u_char *) (&swapin)); |
| 696 | case SWAPOUT: |
| 697 | return ((u_char *) (&swapout)); |
| 698 | case IOSENT: |
| 699 | return ((u_char *) (&blocks_write)); |
| 700 | case IORECEIVE: |
| 701 | return ((u_char *) (&blocks_read)); |
| 702 | case SYSINTERRUPTS: |
| 703 | return ((u_char *) (&interrupts)); |
| 704 | case SYSCONTEXT: |
| 705 | return ((u_char *) (&context_sw)); |
| 706 | case CPUUSER: |
| 707 | return ((u_char *) (&cpu_perc[V_CPU_USER])); |
| 708 | case CPUSYSTEM: |
| 709 | return ((u_char *) (&cpu_perc[V_CPU_SYSTEM])); |
| 710 | case CPUIDLE: |
| 711 | return ((u_char *) (&cpu_perc[V_CPU_IDLE])); |
| 712 | case CPURAWUSER: |
| 713 | take_snapshot(&raw_values); |
| 714 | /* |
| 715 | * LINTED has to be 'long' |
| 716 | */ |
| 717 | long_ret = |
| 718 | (long) (raw_values.css_cpu[V_CPU_USER] / raw_values.css_cpus); |
| 719 | return ((u_char *) (&long_ret)); |
| 720 | /* |
| 721 | * We are missing CPURAWNICE, Dynix does not account for this in the kernel so this OID can not |
| 722 | */ |
| 723 | /* |
| 724 | * be returned. Also, these values will roll over sooner or later and then return inaccurate data |
| 725 | */ |
| 726 | /* |
| 727 | * but the MIB wants Integer32 so we cannot put a counter here |
| 728 | */ |
| 729 | /* |
| 730 | * (Has been changed to Counter32 in the latest MIB version!) |
| 731 | */ |
| 732 | case CPURAWSYSTEM: |
| 733 | take_snapshot(&raw_values); |
| 734 | /* |
| 735 | * LINTED has to be 'long' |
| 736 | */ |
| 737 | long_ret = |
| 738 | (long) ((raw_values.css_cpu[V_CPU_KERNEL] + |
| 739 | raw_values.css_cpu[V_CPU_STREAM]) / |
| 740 | raw_values.css_cpus); |
| 741 | return ((u_char *) (&long_ret)); |
| 742 | case CPURAWIDLE: |
| 743 | take_snapshot(&raw_values); |
| 744 | /* |
| 745 | * LINTED has to be 'long' |
| 746 | */ |
| 747 | long_ret = |
| 748 | (long) (raw_values.css_cpu[V_CPU_IDLE] / raw_values.css_cpus); |
| 749 | return ((u_char *) (&long_ret)); |
| 750 | case CPURAWWAIT: |
| 751 | take_snapshot(&raw_values); |
| 752 | /* |
| 753 | * LINTED has to be 'long' |
| 754 | */ |
| 755 | long_ret = |
| 756 | (long) (raw_values.css_cpu[V_CPU_STREAM] / |
| 757 | raw_values.css_cpus); |
| 758 | return ((u_char *) (&long_ret)); |
| 759 | case CPURAWKERNEL: |
| 760 | take_snapshot(&raw_values); |
| 761 | /* |
| 762 | * LINTED has to be 'long' |
| 763 | */ |
| 764 | long_ret = |
| 765 | (long) (raw_values.css_cpu[V_CPU_KERNEL] / |
| 766 | raw_values.css_cpus); |
| 767 | return ((u_char *) (&long_ret)); |
| 768 | case IORAWSENT: |
| 769 | long_ret = (long) (raw_values.css_blocks_write); |
| 770 | return ((u_char *) (&long_ret)); |
| 771 | case IORAWRECEIVE: |
| 772 | long_ret = (long) (raw_values.css_blocks_read); |
| 773 | return ((u_char *) (&long_ret)); |
| 774 | |
| 775 | /* |
| 776 | * reserved for future use |
| 777 | */ |
| 778 | /* |
| 779 | * case ERRORFLAG: |
| 780 | * return((u_char *) (&long_ret)); |
| 781 | * case ERRORMSG: |
| 782 | * return((u_char *) (&long_ret)); |
| 783 | */ |
| 784 | default: |
| 785 | snmp_log(LOG_ERR, |
| 786 | "vmstat_dynix: Error in request, no match found.\n"); |
| 787 | } |
| 788 | return (NULL); |
| 789 | } /* *var_extensible_vmstat ends here */ |
| 790 | |
| 791 | /* |
| 792 | * Functions end here |
| 793 | */ |
| 794 | |
| 795 | /* |
| 796 | * Program ends here |
| 797 | */ |