src/processes.c

   1 /**
   2  * collectd - src/processes.c
   3  * Copyright (C) 2005  Lyonel Vincent
   4  * Copyright (C) 2006  Florian Forster (Mach code)
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; either version 2 of the License, or (at your
   9  * option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  19  *
  20  * Authors:
  21  *   Lyonel Vincent <lyonel at ezix.org>
  22  *   Florian octo Forster <octo at verplant.org>
  23  **/
  24
  25 #include "collectd.h"
  26 #include "common.h"
  27 #include "plugin.h"
  28 #include "utils_debug.h"
  29
  30 /* Include header files for the mach system, if they exist.. */
  31 #if HAVE_MACH_MACH_INIT_H
  32 #  include <mach/mach_init.h>
  33 #endif
  34 #if HAVE_MACH_HOST_PRIV_H
  35 #  include <mach/host_priv.h>
  36 #endif
  37 #if HAVE_MACH_MACH_ERROR_H
  38 #  include <mach/mach_error.h>
  39 #endif
  40 #if HAVE_MACH_MACH_HOST_H
  41 #  include <mach/mach_host.h>
  42 #endif
  43 #if HAVE_MACH_MACH_PORT_H
  44 #  include <mach/mach_port.h>
  45 #endif
  46 #if HAVE_MACH_MACH_TYPES_H
  47 #  include <mach/mach_types.h>
  48 #endif
  49 #if HAVE_MACH_MESSAGE_H
  50 #  include <mach/message.h>
  51 #endif
  52 #if HAVE_MACH_PROCESSOR_SET_H
  53 #  include <mach/processor_set.h>
  54 #endif
  55 #if HAVE_MACH_TASK_H
  56 #  include <mach/task.h>
  57 #endif
  58 #if HAVE_MACH_THREAD_ACT_H
  59 #  include <mach/thread_act.h>
  60 #endif
  61 #if HAVE_MACH_VM_REGION_H
  62 #  include <mach/vm_region.h>
  63 #endif
  64 #if HAVE_MACH_VM_MAP_H
  65 #  include <mach/vm_map.h>
  66 #endif
  67 #if HAVE_MACH_VM_PROT_H
  68 #  include <mach/vm_prot.h>
  69 #endif
  70
  71 #define MODULE_NAME "processes"
  72
  73 #if HAVE_THREAD_INFO || KERNEL_LINUX
  74 # define PROCESSES_HAVE_READ 1
  75 #else
  76 # define PROCESSES_HAVE_READ 0
  77 #endif
  78
  79 #define BUFSIZE 256
  80
  81 static char *ps_file = "processes.rrd";
  82
  83 static char *ds_def[] =
  84 {
  85         "DS:running:GAUGE:"COLLECTD_HEARTBEAT":0:65535",
  86         "DS:sleeping:GAUGE:"COLLECTD_HEARTBEAT":0:65535",
  87         "DS:zombies:GAUGE:"COLLECTD_HEARTBEAT":0:65535",
  88         "DS:stopped:GAUGE:"COLLECTD_HEARTBEAT":0:65535",
  89         "DS:paging:GAUGE:"COLLECTD_HEARTBEAT":0:65535",
  90         "DS:blocked:GAUGE:"COLLECTD_HEARTBEAT":0:65535",
  91         NULL
  92 };
  93 static int ds_num = 6;
  94
  95 #if HAVE_THREAD_INFO
  96 static mach_port_t port_host_self;
  97 static mach_port_t port_task_self;
  98
  99 static processor_set_name_array_t pset_list;
 100 static mach_msg_type_number_t     pset_list_len;
 101 /* #endif HAVE_THREAD_INFO */
 102
 103 #elif KERNEL_LINUX
 104 /* No global variables */
 105 #endif /* KERNEL_LINUX */
 106
 107 static void ps_init (void)
 108 {
 109 #if HAVE_THREAD_INFO
 110         kern_return_t status;
 111
 112         port_host_self = mach_host_self ();
 113         port_task_self = mach_task_self ();
 114
 115         if (pset_list != NULL)
 116         {
 117                 vm_deallocate (port_task_self,
 118                                 (vm_address_t) pset_list,
 119                                 pset_list_len * sizeof (processor_set_t));
 120                 pset_list = NULL;
 121                 pset_list_len = 0;
 122         }
 123
 124         if ((status = host_processor_sets (port_host_self,
 125                                         &pset_list,
 126                                         &pset_list_len)) != KERN_SUCCESS)
 127         {
 128                 syslog (LOG_ERR, "host_processor_sets failed: %s\n",
 129                                 mach_error_string (status));
 130                 pset_list = NULL;
 131                 pset_list_len = 0;
 132                 return;
 133         }
 134 /* #endif HAVE_THREAD_INFO */
 135
 136 #elif KERNEL_LINUX
 137         /* No init */
 138 #endif /* KERNEL_LINUX */
 139
 140         return;
 141 }
 142
 143 static void ps_write (char *host, char *inst, char *val)
 144 {
 145         rrd_update_file (host, ps_file, val, ds_def, ds_num);
 146 }
 147
 148 #if PROCESSES_HAVE_READ
 149 static void ps_submit (int running,
 150                 int sleeping,
 151                 int zombies,
 152                 int stopped,
 153                 int paging,
 154                 int blocked)
 155 {
 156         char buf[BUFSIZE];
 157
 158         if (snprintf (buf, BUFSIZE, "%u:%i:%i:%i:%i:%i:%i",
 159                                 (unsigned int) curtime,
 160                                 running, sleeping, zombies, stopped, paging,
 161                                 blocked) >= BUFSIZE)
 162                 return;
 163
 164         plugin_submit (MODULE_NAME, "-", buf);
 165 }
 166
 167 static void ps_read (void)
 168 {
 169 #if HAVE_THREAD_INFO
 170         kern_return_t            status;
 171
 172         int                      pset;
 173         processor_set_t          port_pset_priv;
 174
 175         int                      task;
 176         task_array_t             task_list;
 177         mach_msg_type_number_t   task_list_len;
 178
 179         int                      thread;
 180         thread_act_array_t       thread_list;
 181         mach_msg_type_number_t   thread_list_len;
 182         thread_basic_info_data_t thread_data;
 183         mach_msg_type_number_t   thread_data_len;
 184
 185         int running  = 0;
 186         int sleeping = 0;
 187         int zombies  = 0;
 188         int stopped  = 0;
 189         int blocked  = 0;
 190
 191         /*
 192          * The Mach-concept is a little different from the traditional UNIX
 193          * concept: All the work is done in threads. Threads are contained in
 194          * `tasks'. Therefore, `task status' doesn't make much sense, since
 195          * it's actually a `thread status'.
 196          * Tasks are assigned to sets of processors, so that's where you go to
 197          * get a list.
 198          */
 199         for (pset = 0; pset < pset_list_len; pset++)
 200         {
 201                 if ((status = host_processor_set_priv (port_host_self,
 202                                                 pset_list[pset],
 203                                                 &port_pset_priv)) != KERN_SUCCESS)
 204                 {
 205                         syslog (LOG_ERR, "host_processor_set_priv failed: %s\n",
 206                                         mach_error_string (status));
 207                         continue;
 208                 }
 209
 210                 if ((status = processor_set_tasks (port_pset_priv,
 211                                                 &task_list,
 212                                                 &task_list_len)) != KERN_SUCCESS)
 213                 {
 214                         syslog (LOG_ERR, "processor_set_tasks failed: %s\n",
 215                                         mach_error_string (status));
 216                         mach_port_deallocate (port_task_self, port_pset_priv);
 217                         continue;
 218                 }
 219
 220                 for (task = 0; task < task_list_len; task++)
 221                 {
 222                         status = task_threads (task_list[task], &thread_list,
 223                                         &thread_list_len);
 224                         if (status != KERN_SUCCESS)
 225                         {
 226                                 /* Apple's `top' treats this case a zombie. It
 227                                  * makes sense to some extend: A `zombie'
 228                                  * thread is nonsense, since the task/process
 229                                  * is dead. */
 230                                 zombies++;
 231                                 DBG ("task_threads failed: %s",
 232                                                 mach_error_string (status));
 233                                 if (task_list[task] != port_task_self)
 234                                         mach_port_deallocate (port_task_self,
 235                                                         task_list[task]);
 236                                 continue; /* with next task_list */
 237                         }
 238
 239                         for (thread = 0; thread < thread_list_len; thread++)
 240                         {
 241                                 thread_data_len = THREAD_BASIC_INFO_COUNT;
 242                                 status = thread_info (thread_list[thread],
 243                                                 THREAD_BASIC_INFO,
 244                                                 (thread_info_t) &thread_data,
 245                                                 &thread_data_len);
 246                                 if (status != KERN_SUCCESS)
 247                                 {
 248                                         syslog (LOG_ERR, "thread_info failed: %s\n",
 249                                                         mach_error_string (status));
 250                                         if (task_list[task] != port_task_self)
 251                                                 mach_port_deallocate (port_task_self,
 252                                                                 thread_list[thread]);
 253                                         continue; /* with next thread_list */
 254                                 }
 255
 256                                 switch (thread_data.run_state)
 257                                 {
 258                                         case TH_STATE_RUNNING:
 259                                                 running++;
 260                                                 break;
 261                                         case TH_STATE_STOPPED:
 262                                         /* What exactly is `halted'? */
 263                                         case TH_STATE_HALTED:
 264                                                 stopped++;
 265                                                 break;
 266                                         case TH_STATE_WAITING:
 267                                                 sleeping++;
 268                                                 break;
 269                                         case TH_STATE_UNINTERRUPTIBLE:
 270                                                 blocked++;
 271                                                 break;
 272                                         /* There is no `zombie' case here,
 273                                          * since there are no zombie-threads.
 274                                          * There's only zombie tasks, which are
 275                                          * handled above. */
 276                                         default:
 277                                                 syslog (LOG_WARNING,
 278                                                                 "Unknown thread status: %s",
 279                                                                 thread_data.run_state);
 280                                                 break;
 281                                 } /* switch (thread_data.run_state) */
 282
 283                                 if (task_list[task] != port_task_self)
 284                                 {
 285                                         status = mach_port_deallocate (port_task_self,
 286                                                         thread_list[thread]);
 287                                         if (status != KERN_SUCCESS)
 288                                                 syslog (LOG_ERR, "mach_port_deallocate failed: %s",
 289                                                                 mach_error_string (status));
 290                                 }
 291                         } /* for (thread_list) */
 292
 293                         if ((status = vm_deallocate (port_task_self,
 294                                                         (vm_address_t) thread_list,
 295                                                         thread_list_len * sizeof (thread_act_t)))
 296                                         != KERN_SUCCESS)
 297                         {
 298                                 syslog (LOG_ERR, "vm_deallocate failed: %s",
 299                                                 mach_error_string (status));
 300                         }
 301                         thread_list = NULL;
 302                         thread_list_len = 0;
 303
 304                         /* Only deallocate the task port, if it isn't our own.
 305                          * Don't know what would happen in that case, but this
 306                          * is what Apple's top does.. ;) */
 307                         if (task_list[task] != port_task_self)
 308                         {
 309                                 status = mach_port_deallocate (port_task_self,
 310                                                 task_list[task]);
 311                                 if (status != KERN_SUCCESS)
 312                                         syslog (LOG_ERR, "mach_port_deallocate failed: %s",
 313                                                         mach_error_string (status));
 314                         }
 315                 } /* for (task_list) */
 316
 317                 if ((status = vm_deallocate (port_task_self,
 318                                 (vm_address_t) task_list,
 319                                 task_list_len * sizeof (task_t))) != KERN_SUCCESS)
 320                 {
 321                         syslog (LOG_ERR, "vm_deallocate failed: %s",
 322                                         mach_error_string (status));
 323                 }
 324                 task_list = NULL;
 325                 task_list_len = 0;
 326
 327                 if ((status = mach_port_deallocate (port_task_self, port_pset_priv))
 328                                 != KERN_SUCCESS)
 329                 {
 330                         syslog (LOG_ERR, "mach_port_deallocate failed: %s",
 331                                         mach_error_string (status));
 332                 }
 333         } /* for (pset_list) */
 334 /* #endif HAVE_THREAD_INFO */
 335
 336 #elif KERNEL_LINUX
 337         int running  = 0;
 338         int sleeping = 0;
 339         int zombies  = 0;
 340         int stopped  = 0;
 341         int paging   = 0;
 342         int blocked  = 0;
 343
 344         char buf[BUFSIZE];
 345         char filename[20]; /* need 17 bytes */
 346         char *fields[BUFSIZE];
 347
 348         struct dirent *ent;
 349         DIR *proc;
 350         FILE *fh;
 351
 352         running = sleeping = zombies = stopped = paging = blocked = 0;
 353
 354         if ((proc = opendir ("/proc")) == NULL)
 355         {
 356                 syslog (LOG_ERR, "Cannot open `/proc': %s", strerror (errno));
 357                 return;
 358         }
 359
 360         while ((ent = readdir (proc)) != NULL)
 361         {
 362                 if (!isdigit (ent->d_name[0]))
 363                         continue;
 364
 365                 if (snprintf (filename, 20, "/proc/%s/stat", ent->d_name) >= 20)
 366                         continue;
 367
 368                 if ((fh = fopen (filename, "r")) == NULL)
 369                 {
 370                         syslog (LOG_ERR, "Cannot open `%s': %s", filename, strerror (errno));
 371                         continue;
 372                 }
 373
 374                 if (fgets (buf, BUFSIZE, fh) == NULL)
 375                 {
 376                         fclose (fh);
 377                         continue;
 378                 }
 379
 380                 fclose (fh);
 381
 382                 if (strsplit (buf, fields, BUFSIZE) < 3)
 383                         continue;
 384
 385                 switch (fields[2][0])
 386                 {
 387                         case 'R': running++;  break;
 388                         case 'S': sleeping++; break;
 389                         case 'D': blocked++;  break;
 390                         case 'Z': zombies++;  break;
 391                         case 'T': stopped++;  break;
 392                         case 'W': paging++;   break;
 393                 }
 394         }
 395
 396         closedir(proc);
 397
 398         ps_submit (running, sleeping, zombies, stopped, paging, blocked);
 399 #endif /* KERNEL_LINUX */
 400 }
 401 #else
 402 # define ps_read NULL
 403 #endif /* PROCESSES_HAVE_READ */
 404
 405 void module_register (void)
 406 {
 407         plugin_register (MODULE_NAME, ps_init, ps_read, ps_write);
 408 }
 409
 410 #undef BUFSIZE
 411 #undef MODULE_NAME