aboutsummaryrefslogtreecommitdiffstats
path: root/pcp/PCPProcessList.c
blob: cae097fd1f4640ef5a4cd44dbce37ec017b8245a (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
/*
htop - PCPProcessList.c
(C) 2014 Hisham H. Muhammad
(C) 2020-2021 htop dev team
(C) 2020-2021 Red Hat, Inc.
Released under the GNU GPLv2+, see the COPYING file
in the source distribution for its full text.
*/

#include "config.h" // IWYU pragma: keep

#include "pcp/PCPProcessList.h"

#include <assert.h>
#include <limits.h>
#include <math.h>
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>

#include "Macros.h"
#include "Object.h"
#include "Platform.h"
#include "Process.h"
#include "Settings.h"
#include "XUtils.h"

#include "pcp/PCPMetric.h"
#include "pcp/PCPProcess.h"


static void PCPProcessList_updateCPUcount(PCPProcessList* this) {
   ProcessList* pl = &(this->super);
   pl->activeCPUs = PCPMetric_instanceCount(PCP_PERCPU_SYSTEM);
   unsigned int cpus = Platform_getMaxCPU();
   if (cpus == pl->existingCPUs)
      return;
   if (cpus == 0)
      cpus = pl->activeCPUs;
   if (cpus <= 1)
      cpus = pl->activeCPUs = 1;
   pl->existingCPUs = cpus;

   free(this->percpu);
   free(this->values);

   this->percpu = xCalloc(cpus, sizeof(pmAtomValue *));
   for (unsigned int i = 0; i < cpus; i++)
      this->percpu[i] = xCalloc(CPU_METRIC_COUNT, sizeof(pmAtomValue));
   this->values = xCalloc(cpus, sizeof(pmAtomValue));
}

static char* setUser(UsersTable* this, unsigned int uid, int pid, int offset) {
   char* name = Hashtable_get(this->users, uid);
   if (name)
      return name;

   pmAtomValue value;
   if (PCPMetric_instance(PCP_PROC_ID_USER, pid, offset, &value, PM_TYPE_STRING)) {
      Hashtable_put(this->users, uid, value.cp);
      name = value.cp;
   }
   return name;
}

ProcessList* ProcessList_new(UsersTable* usersTable, Hashtable* dynamicMeters, Hashtable* dynamicColumns, Hashtable* pidMatchList, uid_t userId) {
   PCPProcessList* this = xCalloc(1, sizeof(PCPProcessList));
   ProcessList* super = &(this->super);

   ProcessList_init(super, Class(PCPProcess), usersTable, dynamicMeters, dynamicColumns, pidMatchList, userId);

   struct timeval timestamp;
   gettimeofday(&timestamp, NULL);
   this->timestamp = pmtimevalToReal(&timestamp);

   this->cpu = xCalloc(CPU_METRIC_COUNT, sizeof(pmAtomValue));
   PCPProcessList_updateCPUcount(this);

   return super;
}

void ProcessList_delete(ProcessList* pl) {
   PCPProcessList* this = (PCPProcessList*) pl;
   ProcessList_done(pl);
   free(this->values);
   for (unsigned int i = 0; i < pl->existingCPUs; i++)
      free(this->percpu[i]);
   free(this->percpu);
   free(this->cpu);
   free(this);
}

static inline long Metric_instance_s32(int metric, int pid, int offset, long fallback) {
   pmAtomValue value;
   if (PCPMetric_instance(metric, pid, offset, &value, PM_TYPE_32))
      return value.l;
   return fallback;
}

static inline long long Metric_instance_s64(int metric, int pid, int offset, long long fallback) {
   pmAtomValue value;
   if (PCPMetric_instance(metric, pid, offset, &value, PM_TYPE_64))
      return value.l;
   return fallback;
}

static inline unsigned long Metric_instance_u32(int metric, int pid, int offset, unsigned long fallback) {
   pmAtomValue value;
   if (PCPMetric_instance(metric, pid, offset, &value, PM_TYPE_U32))
      return value.ul;
   return fallback;
}

static inline unsigned long long Metric_instance_u64(int metric, int pid, int offset, unsigned long long fallback) {
   pmAtomValue value;
   if (PCPMetric_instance(metric, pid, offset, &value, PM_TYPE_U64))
      return value.ull;
   return fallback;
}

static inline unsigned long long Metric_instance_time(int metric, int pid, int offset) {
   pmAtomValue value;
   if (PCPMetric_instance(metric, pid, offset, &value, PM_TYPE_U64))
      return value.ull / 10;
   return 0;
}

static inline unsigned long long Metric_instance_ONE_K(int metric, int pid, int offset) {
   pmAtomValue value;
   if (PCPMetric_instance(metric, pid, offset, &value, PM_TYPE_U64))
      return value.ull / ONE_K;
   return ULLONG_MAX;
}

static inline char Metric_instance_char(int metric, int pid, int offset, char fallback) {
   pmAtomValue value;
   if (PCPMetric_instance(metric, pid, offset, &value, PM_TYPE_STRING)) {
      char uchar = value.cp[0];
      free(value.cp);
      return uchar;
   }
   return fallback;
}

static inline ProcessState PCPProcessList_getProcessState(char state) {
   switch (state) {
      case '?': return UNKNOWN;
      case 'R': return RUNNING;
      case 'W': return WAITING;
      case 'D': return UNINTERRUPTIBLE_WAIT;
      case 'P': return PAGING;
      case 'T': return STOPPED;
      case 't': return TRACED;
      case 'Z': return ZOMBIE;
      case 'X': return DEFUNCT;
      case 'I': return IDLE;
      case 'S': return SLEEPING;
      default: return UNKNOWN;
   }
}

static void PCPProcessList_updateID(Process* process, int pid, int offset) {
   process->tgid = Metric_instance_u32(PCP_PROC_TGID, pid, offset, 1);
   process->ppid = Metric_instance_u32(PCP_PROC_PPID, pid, offset, 1);
   process->state = PCPProcessList_getProcessState(Metric_instance_char(PCP_PROC_STATE, pid, offset, '?'));
}

static void PCPProcessList_updateInfo(Process* process, int pid, int offset, char* command, size_t commLen) {
   PCPProcess* pp = (PCPProcess*) process;
   pmAtomValue value;

   if (!PCPMetric_instance(PCP_PROC_CMD, pid, offset, &value, PM_TYPE_STRING))
      value.cp = xStrdup("<unknown>");
   String_safeStrncpy(command, value.cp, commLen);
   free(value.cp);

   process->pgrp = Metric_instance_u32(PCP_PROC_PGRP, pid, offset, 0);
   process->session = Metric_instance_u32(PCP_PROC_SESSION, pid, offset, 0);
   process->tty_nr = Metric_instance_u32(PCP_PROC_TTY, pid, offset, 0);
   process->tpgid = Metric_instance_u32(PCP_PROC_TTYPGRP, pid, offset, 0);
   process->minflt = Metric_instance_u32(PCP_PROC_MINFLT, pid, offset, 0);
   pp->cminflt = Metric_instance_u32(PCP_PROC_CMINFLT, pid, offset, 0);
   process->majflt = Metric_instance_u32(PCP_PROC_MAJFLT, pid, offset, 0);
   pp->cmajflt = Metric_instance_u32(PCP_PROC_CMAJFLT, pid, offset, 0);
   pp->utime = Metric_instance_time(PCP_PROC_UTIME, pid, offset);
   pp->stime = Metric_instance_time(PCP_PROC_STIME, pid, offset);
   pp->cutime = Metric_instance_time(PCP_PROC_CUTIME, pid, offset);
   pp->cstime = Metric_instance_time(PCP_PROC_CSTIME, pid, offset);
   process->priority = Metric_instance_u32(PCP_PROC_PRIORITY, pid, offset, 0);
   process->nice = Metric_instance_s32(PCP_PROC_NICE, pid, offset, 0);
   process->nlwp = Metric_instance_u32(PCP_PROC_THREADS, pid, offset, 0);
   process->starttime_ctime = Metric_instance_time(PCP_PROC_STARTTIME, pid, offset);
   process->processor = Metric_instance_u32(PCP_PROC_PROCESSOR, pid, offset, 0);

   process->time = pp->utime + pp->stime;
}

static void PCPProcessList_updateIO(PCPProcess* pp, int pid, int offset, unsigned long long now) {
   pmAtomValue value;

   pp->io_rchar = Metric_instance_ONE_K(PCP_PROC_IO_RCHAR, pid, offset);
   pp->io_wchar = Metric_instance_ONE_K(PCP_PROC_IO_WCHAR, pid, offset);
   pp->io_syscr = Metric_instance_u64(PCP_PROC_IO_SYSCR, pid, offset, ULLONG_MAX);
   pp->io_syscw = Metric_instance_u64(PCP_PROC_IO_SYSCW, pid, offset, ULLONG_MAX);
   pp->io_cancelled_write_bytes = Metric_instance_ONE_K(PCP_PROC_IO_CANCELLED, pid, offset);

   if (PCPMetric_instance(PCP_PROC_IO_READB, pid, offset, &value, PM_TYPE_U64)) {
      unsigned long long last_read = pp->io_read_bytes;
      pp->io_read_bytes = value.ull / ONE_K;
      pp->io_rate_read_bps = ONE_K * (pp->io_read_bytes - last_read) /
                                     (now - pp->io_last_scan_time);
   } else {
      pp->io_read_bytes = ULLONG_MAX;
      pp->io_rate_read_bps = NAN;
   }

   if (PCPMetric_instance(PCP_PROC_IO_WRITEB, pid, offset, &value, PM_TYPE_U64)) {
      unsigned long long last_write = pp->io_write_bytes;
      pp->io_write_bytes = value.ull;
      pp->io_rate_write_bps = ONE_K * (pp->io_write_bytes - last_write) /
                                      (now - pp->io_last_scan_time);
   } else {
      pp->io_write_bytes = ULLONG_MAX;
      pp->io_rate_write_bps = NAN;
   }

   pp->io_last_scan_time = now;
}

static void PCPProcessList_updateMemory(PCPProcess* pp, int pid, int offset) {
   pp->super.m_virt = Metric_instance_u32(PCP_PROC_MEM_SIZE, pid, offset, 0);
   pp->super.m_resident = Metric_instance_u32(PCP_PROC_MEM_RSS, pid, offset, 0);
   pp->m_share = Metric_instance_u32(PCP_PROC_MEM_SHARE, pid, offset, 0);
   pp->m_trs = Metric_instance_u32(PCP_PROC_MEM_TEXTRS, pid, offset, 0);
   pp->m_lrs = Metric_instance_u32(PCP_PROC_MEM_LIBRS, pid, offset, 0);
   pp->m_drs = Metric_instance_u32(PCP_PROC_MEM_DATRS, pid, offset, 0);
   pp->m_dt = Metric_instance_u32(PCP_PROC_MEM_DIRTY, pid, offset, 0);
}

static void PCPProcessList_updateSmaps(PCPProcess* pp, pid_t pid, int offset) {
   pp->m_pss = Metric_instance_u64(PCP_PROC_SMAPS_PSS, pid, offset, 0);
   pp->m_swap = Metric_instance_u64(PCP_PROC_SMAPS_SWAP, pid, offset, 0);
   pp->m_psswp = Metric_instance_u64(PCP_PROC_SMAPS_SWAPPSS, pid, offset, 0);
}

static void PCPProcessList_readOomData(PCPProcess* pp, int pid, int offset) {
   pp->oom = Metric_instance_u32(PCP_PROC_OOMSCORE, pid, offset, 0);
}

static void PCPProcessList_readAutogroup(PCPProcess* pp, int pid, int offset) {
   pp->autogroup_id = Metric_instance_s64(PCP_PROC_AUTOGROUP_ID, pid, offset, -1);
   pp->autogroup_nice = Metric_instance_s32(PCP_PROC_AUTOGROUP_NICE, pid, offset, 0);
}

static void PCPProcessList_readCtxtData(PCPProcess* pp, int pid, int offset) {
   pmAtomValue value;
   unsigned long ctxt = 0;

   if (PCPMetric_instance(PCP_PROC_VCTXSW, pid, offset, &value, PM_TYPE_U32))
      ctxt += value.ul;
   if (PCPMetric_instance(PCP_PROC_NVCTXSW, pid, offset, &value, PM_TYPE_U32))
      ctxt += value.ul;

   pp->ctxt_diff = ctxt > pp->ctxt_total ? ctxt - pp->ctxt_total : 0;
   pp->ctxt_total = ctxt;
}

static char* setString(PCPMetric metric, int pid, int offset, char* string) {
   if (string)
      free(string);
   pmAtomValue value;
   if (PCPMetric_instance(metric, pid, offset, &value, PM_TYPE_STRING))
      string = value.cp;
   else
      string = NULL;
   return string;
}

static void PCPProcessList_updateTTY(Process* process, int pid, int offset) {
   process->tty_name = setString(PCP_PROC_TTYNAME, pid, offset, process->tty_name);
}

static void PCPProcessList_readCGroups(PCPProcess* pp, int pid, int offset) {
   pp->cgroup = setString(PCP_PROC_CGROUPS, pid, offset, pp->cgroup);
}

static void PCPProcessList_readSecattrData(PCPProcess* pp, int pid, int offset) {
   pp->secattr = setString(PCP_PROC_LABELS, pid, offset, pp->secattr);
}

static void PCPProcessList_readCwd(PCPProcess* pp, int pid, int offset) {
   pp->super.procCwd = setString(PCP_PROC_CWD, pid, offset, pp->super.procCwd);
}

static void PCPProcessList_updateUsername(Process* process, int pid, int offset, UsersTable* users) {
   process->st_uid = Metric_instance_u32(PCP_PROC_ID_UID, pid, offset, 0);
   process->user = setUser(users, process->st_uid, pid, offset);
}

static void PCPProcessList_updateCmdline(Process* process, int pid, int offset, const char* comm) {
   pmAtomValue value;
   if (!PCPMetric_instance(PCP_PROC_PSARGS, pid, offset, &value, PM_TYPE_STRING)) {
      if (process->state != ZOMBIE)
         process->isKernelThread = true;
      Process_updateCmdline(process, NULL, 0, 0);
      return;
   }

   char* command = value.cp;
   int length = strlen(command);
   if (command[0] != '(') {
      process->isKernelThread = false;
   } else {
      ++command;
      --length;
      if (command[length - 1] == ')')
         command[--length] = '\0';
      process->isKernelThread = true;
   }

   int tokenStart = 0;
   for (int i = 0; i < length; i++) {
      /* htop considers the next character after the last / that is before
       * basenameOffset, as the start of the basename in cmdline - see
       * Process_writeCommand */
      if (command[i] == '/')
         tokenStart = i + 1;
   }
   int tokenEnd = length;

   Process_updateCmdline(process, command, tokenStart, tokenEnd);
   free(value.cp);

   Process_updateComm(process, comm);

   if (PCPMetric_instance(PCP_PROC_EXE, pid, offset, &value, PM_TYPE_STRING)) {
      Process_updateExe(process, value.cp[0] ? value.cp : NULL);
      free(value.cp);
   }
}

static bool PCPProcessList_updateProcesses(PCPProcessList* this, double period, struct timeval* tv) {
   ProcessList* pl = (ProcessList*) this;
   const Settings* settings = pl->settings;

   bool hideKernelThreads = settings->hideKernelThreads;
   bool hideUserlandThreads = settings->hideUserlandThreads;

   unsigned long long now = tv->tv_sec * 1000LL + tv->tv_usec / 1000LL;
   int pid = -1, offset = -1;

   /* for every process ... */
   while (PCPMetric_iterate(PCP_PROC_PID, &pid, &offset)) {

      bool preExisting;
      Process* proc = ProcessList_getProcess(pl, pid, &preExisting, PCPProcess_new);
      PCPProcess* pp = (PCPProcess*) proc;
      PCPProcessList_updateID(proc, pid, offset);
      proc->isUserlandThread = proc->pid != proc->tgid;
      pp->offset = offset >= 0 ? offset : 0;

      /*
       * These conditions will not trigger on first occurrence, cause we need to
       * add the process to the ProcessList and do all one time scans
       * (e.g. parsing the cmdline to detect a kernel thread)
       * But it will short-circuit subsequent scans.
       */
      if (preExisting && hideKernelThreads && Process_isKernelThread(proc)) {
         proc->updated = true;
         proc->show = false;
         if (proc->state == RUNNING)
            pl->runningTasks++;
         pl->kernelThreads++;
         pl->totalTasks++;
         continue;
      }
      if (preExisting && hideUserlandThreads && Process_isUserlandThread(proc)) {
         proc->updated = true;
         proc->show = false;
         if (proc->state == RUNNING)
            pl->runningTasks++;
         pl->userlandThreads++;
         pl->totalTasks++;
         continue;
      }

      if (settings->flags & PROCESS_FLAG_IO)
         PCPProcessList_updateIO(pp, pid, offset, now);

      PCPProcessList_updateMemory(pp, pid, offset);

      if ((settings->flags & PROCESS_FLAG_LINUX_SMAPS) &&
          (Process_isKernelThread(proc) == false)) {
         if (PCPMetric_enabled(PCP_PROC_SMAPS_PSS))
            PCPProcessList_updateSmaps(pp, pid, offset);
      }

      char command[MAX_NAME + 1];
      unsigned int tty_nr = proc->tty_nr;
      unsigned long long int lasttimes = pp->utime + pp->stime;

      PCPProcessList_updateInfo(proc, pid, offset, command, sizeof(command));
      proc->starttime_ctime += Platform_getBootTime();
      if (tty_nr != proc->tty_nr)
         PCPProcessList_updateTTY(proc, pid, offset);

      float percent_cpu = (pp->utime + pp->stime - lasttimes) / period * 100.0;
      proc->percent_cpu = isnan(percent_cpu) ?
                          0.0 : CLAMP(percent_cpu, 0.0, pl->activeCPUs * 100.0);
      proc->percent_mem = proc->m_resident / (double)pl->totalMem * 100.0;

      PCPProcessList_updateUsername(proc, pid, offset, pl->usersTable);

      if (!preExisting) {
         PCPProcessList_updateCmdline(proc, pid, offset, command);
         Process_fillStarttimeBuffer(proc);
         ProcessList_add(pl, proc);
      } else if (settings->updateProcessNames && proc->state != ZOMBIE) {
         PCPProcessList_updateCmdline(proc, pid, offset, command);
      }

      if (settings->flags & PROCESS_FLAG_LINUX_CGROUP)
         PCPProcessList_readCGroups(pp, pid, offset);

      if (settings->flags & PROCESS_FLAG_LINUX_OOM)
         PCPProcessList_readOomData(pp, pid, offset);

      if (settings->flags & PROCESS_FLAG_LINUX_CTXT)
         PCPProcessList_readCtxtData(pp, pid, offset);

      if (settings->flags & PROCESS_FLAG_LINUX_SECATTR)
         PCPProcessList_readSecattrData(pp, pid, offset);

      if (settings->flags & PROCESS_FLAG_CWD)
         PCPProcessList_readCwd(pp, pid, offset);

      if (settings->flags & PROCESS_FLAG_LINUX_AUTOGROUP)
         PCPProcessList_readAutogroup(pp, pid, offset);

      if (proc->state == ZOMBIE && !proc->cmdline && command[0]) {
         Process_updateCmdline(proc, command, 0, strlen(command));
      } else if (Process_isThread(proc)) {
         if ((settings->showThreadNames || Process_isKernelThread(proc)) && command[0]) {
            Process_updateCmdline(proc, command, 0, strlen(command));
         }

         if (Process_isKernelThread(proc)) {
            pl->kernelThreads++;
         } else {
            pl->userlandThreads++;
         }
      }

      /* Set at the end when we know if a new entry is a thread */
      proc->show = ! ((hideKernelThreads && Process_isKernelThread(proc)) ||
                      (hideUserlandThreads && Process_isUserlandThread(proc)));

      pl->totalTasks++;
      if (proc->state == RUNNING)
         pl->runningTasks++;
      proc->updated = true;
   }
   return true;
}

static void PCPProcessList_updateMemoryInfo(ProcessList* super) {
   unsigned long long int freeMem = 0;
   unsigned long long int swapFreeMem = 0;
   unsigned long long int sreclaimableMem = 0;
   super->totalMem = super->usedMem = super->cachedMem = 0;
   super->usedSwap = super->totalSwap = super->sharedMem = 0;

   pmAtomValue value;
   if (PCPMetric_values(PCP_MEM_TOTAL, &value, 1, PM_TYPE_U64) != NULL)
      super->totalMem = value.ull;
   if (PCPMetric_values(PCP_MEM_FREE, &value, 1, PM_TYPE_U64) != NULL)
      freeMem = value.ull;
   if (PCPMetric_values(PCP_MEM_BUFFERS, &value, 1, PM_TYPE_U64) != NULL)
      super->buffersMem = value.ull;
   if (PCPMetric_values(PCP_MEM_SRECLAIM, &value, 1, PM_TYPE_U64) != NULL)
      sreclaimableMem = value.ull;
   if (PCPMetric_values(PCP_MEM_SHARED, &value, 1, PM_TYPE_U64) != NULL)
      super->sharedMem = value.ull;
   if (PCPMetric_values(PCP_MEM_CACHED, &value, 1, PM_TYPE_U64) != NULL)
      super->cachedMem = value.ull + sreclaimableMem - super->sharedMem;
   const memory_t usedDiff = freeMem + super->cachedMem + sreclaimableMem + super->buffersMem;
   super->usedMem = (super->totalMem >= usedDiff) ?
           super->totalMem - usedDiff : super->totalMem - freeMem;
   if (PCPMetric_values(PCP_MEM_AVAILABLE, &value, 1, PM_TYPE_U64) != NULL)
      super->availableMem = MINIMUM(value.ull, super->totalMem);
   else
      super->availableMem = freeMem;
   if (PCPMetric_values(PCP_MEM_SWAPFREE, &value, 1, PM_TYPE_U64) != NULL)
      swapFreeMem = value.ull;
   if (PCPMetric_values(PCP_MEM_SWAPTOTAL, &value, 1, PM_TYPE_U64) != NULL)
      super->totalSwap = value.ull;
   if (PCPMetric_values(PCP_MEM_SWAPCACHED, &value, 1, PM_TYPE_U64) != NULL)
      super->cachedSwap = value.ull;
   super->usedSwap = super->totalSwap - swapFreeMem - super->cachedSwap;
}

/* make copies of previously sampled values to avoid overwrite */
static inline void PCPProcessList_backupCPUTime(pmAtomValue* values) {
   /* the PERIOD fields (must) mirror the TIME fields */
   for (int metric = CPU_TOTAL_TIME; metric < CPU_TOTAL_PERIOD; metric++) {
      values[metric + CPU_TOTAL_PERIOD] = values[metric];
   }
}

static inline void PCPProcessList_saveCPUTimePeriod(pmAtomValue* values, CPUMetric previous, pmAtomValue* latest) {
   pmAtomValue* value;

   /* new value for period */
   value = &values[previous];
   if (latest->ull > value->ull)
      value->ull = latest->ull - value->ull;
   else
      value->ull = 0;

   /* new value for time */
   value = &values[previous - CPU_TOTAL_PERIOD];
   value->ull = latest->ull;
}

/* using copied sampled values and new values, calculate derivations */
static void PCPProcessList_deriveCPUTime(pmAtomValue* values) {

   pmAtomValue* usertime = &values[CPU_USER_TIME];
   pmAtomValue* guesttime = &values[CPU_GUEST_TIME];
   usertime->ull -= guesttime->ull;

   pmAtomValue* nicetime = &values[CPU_NICE_TIME];
   pmAtomValue* guestnicetime = &values[CPU_GUESTNICE_TIME];
   nicetime->ull -= guestnicetime->ull;

   pmAtomValue* idletime = &values[CPU_IDLE_TIME];
   pmAtomValue* iowaittime = &values[CPU_IOWAIT_TIME];
   pmAtomValue* idlealltime = &values[CPU_IDLE_ALL_TIME];
   idlealltime->ull = idletime->ull + iowaittime->ull;

   pmAtomValue* systemtime = &values[CPU_SYSTEM_TIME];
   pmAtomValue* irqtime = &values[CPU_IRQ_TIME];
   pmAtomValue* softirqtime = &values[CPU_SOFTIRQ_TIME];
   pmAtomValue* systalltime = &values[CPU_SYSTEM_ALL_TIME];
   systalltime->ull = systemtime->ull + irqtime->ull + softirqtime->ull;

   pmAtomValue* virtalltime = &values[CPU_GUEST_TIME];
   virtalltime->ull = guesttime->ull + guestnicetime->ull;

   pmAtomValue* stealtime = &values[CPU_STEAL_TIME];
   pmAtomValue* totaltime = &values[CPU_TOTAL_TIME];
   totaltime->ull = usertime->ull + nicetime->ull + systalltime->ull +
                    idlealltime->ull + stealtime->ull + virtalltime->ull;

   PCPProcessList_saveCPUTimePeriod(values, CPU_USER_PERIOD, usertime);
   PCPProcessList_saveCPUTimePeriod(values, CPU_NICE_PERIOD, nicetime);
   PCPProcessList_saveCPUTimePeriod(values, CPU_SYSTEM_PERIOD, systemtime);
   PCPProcessList_saveCPUTimePeriod(values, CPU_SYSTEM_ALL_PERIOD, systalltime);
   PCPProcessList_saveCPUTimePeriod(values, CPU_IDLE_ALL_PERIOD, idlealltime);
   PCPProcessList_saveCPUTimePeriod(values, CPU_IDLE_PERIOD, idletime);
   PCPProcessList_saveCPUTimePeriod(values, CPU_IOWAIT_PERIOD, iowaittime);
   PCPProcessList_saveCPUTimePeriod(values, CPU_IRQ_PERIOD, irqtime);
   PCPProcessList_saveCPUTimePeriod(values, CPU_SOFTIRQ_PERIOD, softirqtime);
   PCPProcessList_saveCPUTimePeriod(values, CPU_STEAL_PERIOD, stealtime);
   PCPProcessList_saveCPUTimePeriod(values, CPU_GUEST_PERIOD, virtalltime);
   PCPProcessList_saveCPUTimePeriod(values, CPU_TOTAL_PERIOD, totaltime);
}

static void PCPProcessList_updateAllCPUTime(PCPProcessList* this, PCPMetric metric, CPUMetric cpumetric)
{
   pmAtomValue* value = &this->cpu[cpumetric];
   if (PCPMetric_values(metric, value, 1, PM_TYPE_U64) == NULL)
      memset(&value, 0, sizeof(pmAtomValue));
}

static void PCPProcessList_updatePerCPUTime(PCPProcessList* this, PCPMetric metric, CPUMetric cpumetric)
{
   int cpus = this->super.existingCPUs;
   if (PCPMetric_values(metric, this->values, cpus, PM_TYPE_U64) == NULL)
      memset(this->values, 0, cpus * sizeof(pmAtomValue));
   for (int i = 0; i < cpus; i++)
      this->percpu[i][cpumetric].ull = this->values[i].ull;
}

static void PCPProcessList_updatePerCPUReal(PCPProcessList* this, PCPMetric metric, CPUMetric cpumetric)
{
   int cpus = this->super.existingCPUs;
   if (PCPMetric_values(metric, this->values, cpus, PM_TYPE_DOUBLE) == NULL)
      memset(this->values, 0, cpus * sizeof(pmAtomValue));
   for (int i = 0; i < cpus; i++)
      this->percpu[i][cpumetric].d = this->values[i].d;
}

static inline void PCPProcessList_scanZfsArcstats(PCPProcessList* this) {
   unsigned long long int dbufSize = 0;
   unsigned long long int dnodeSize = 0;
   unsigned long long int bonusSize = 0;
   pmAtomValue value;

   memset(&this->zfs, 0, sizeof(ZfsArcStats));
   if (PCPMetric_values(PCP_ZFS_ARC_ANON_SIZE, &value, 1, PM_TYPE_U64))
      this->zfs.anon = value.ull / ONE_K;
   if (PCPMetric_values(PCP_ZFS_ARC_C_MAX, &value, 1, PM_TYPE_U64))
      this->zfs.max = value.ull / ONE_K;
   if (PCPMetric_values(PCP_ZFS_ARC_BONUS_SIZE, &value, 1, PM_TYPE_U64))
      bonusSize = value.ull / ONE_K;
   if (PCPMetric_values(PCP_ZFS_ARC_DBUF_SIZE, &value, 1, PM_TYPE_U64))
      dbufSize = value.ull / ONE_K;
   if (PCPMetric_values(PCP_ZFS_ARC_DNODE_SIZE, &value, 1, PM_TYPE_U64))
      dnodeSize = value.ull / ONE_K;
   if (PCPMetric_values(PCP_ZFS_ARC_COMPRESSED_SIZE, &value, 1, PM_TYPE_U64))
      this->zfs.compressed = value.ull / ONE_K;
   if (PCPMetric_values(PCP_ZFS_ARC_UNCOMPRESSED_SIZE, &value, 1, PM_TYPE_U64))
      this->zfs.uncompressed = value.ull / ONE_K;
   if (PCPMetric_values(PCP_ZFS_ARC_HDR_SIZE, &value, 1, PM_TYPE_U64))
      this->zfs.header = value.ull / ONE_K;
   if (PCPMetric_values(PCP_ZFS_ARC_MFU_SIZE, &value, 1, PM_TYPE_U64))
      this->zfs.MFU = value.ull / ONE_K;
   if (PCPMetric_values(PCP_ZFS_ARC_MRU_SIZE, &value, 1, PM_TYPE_U64))
      this->zfs.MRU = value.ull / ONE_K;
   if (PCPMetric_values(PCP_ZFS_ARC_SIZE, &value, 1, PM_TYPE_U64))
      this->zfs.size = value.ull / ONE_K;

   this->zfs.other = (dbufSize + dnodeSize + bonusSize) / ONE_K;
   this->zfs.enabled = (this->zfs.size > 0);
   this->zfs.isCompressed = (this->zfs.compressed > 0);
}

static void PCPProcessList_updateHeader(ProcessList* super, const Settings* settings) {
   PCPProcessList_updateMemoryInfo(super);

   PCPProcessList* this = (PCPProcessList*) super;
   PCPProcessList_updateCPUcount(this);

   PCPProcessList_backupCPUTime(this->cpu);
   PCPProcessList_updateAllCPUTime(this, PCP_CPU_USER, CPU_USER_TIME);
   PCPProcessList_updateAllCPUTime(this, PCP_CPU_NICE, CPU_NICE_TIME);
   PCPProcessList_updateAllCPUTime(this, PCP_CPU_SYSTEM, CPU_SYSTEM_TIME);
   PCPProcessList_updateAllCPUTime(this, PCP_CPU_IDLE, CPU_IDLE_TIME);
   PCPProcessList_updateAllCPUTime(this, PCP_CPU_IOWAIT, CPU_IOWAIT_TIME);
   PCPProcessList_updateAllCPUTime(this, PCP_CPU_IRQ, CPU_IRQ_TIME);
   PCPProcessList_updateAllCPUTime(this, PCP_CPU_SOFTIRQ, CPU_SOFTIRQ_TIME);
   PCPProcessList_updateAllCPUTime(this, PCP_CPU_STEAL, CPU_STEAL_TIME);
   PCPProcessList_updateAllCPUTime(this, PCP_CPU_GUEST, CPU_GUEST_TIME);
   PCPProcessList_deriveCPUTime(this->cpu);

   for (unsigned int i = 0; i < super->existingCPUs; i++)
      PCPProcessList_backupCPUTime(this->percpu[i]);
   PCPProcessList_updatePerCPUTime(this, PCP_PERCPU_USER, CPU_USER_TIME);
   PCPProcessList_updatePerCPUTime(this, PCP_PERCPU_NICE, CPU_NICE_TIME);
   PCPProcessList_updatePerCPUTime(this, PCP_PERCPU_SYSTEM, CPU_SYSTEM_TIME);
   PCPProcessList_updatePerCPUTime(this, PCP_PERCPU_IDLE, CPU_IDLE_TIME);
   PCPProcessList_updatePerCPUTime(this, PCP_PERCPU_IOWAIT, CPU_IOWAIT_TIME);
   PCPProcessList_updatePerCPUTime(this, PCP_PERCPU_IRQ, CPU_IRQ_TIME);
   PCPProcessList_updatePerCPUTime(this, PCP_PERCPU_SOFTIRQ, CPU_SOFTIRQ_TIME);
   PCPProcessList_updatePerCPUTime(this, PCP_PERCPU_STEAL, CPU_STEAL_TIME);
   PCPProcessList_updatePerCPUTime(this, PCP_PERCPU_GUEST, CPU_GUEST_TIME);
   for (unsigned int i = 0; i < super->existingCPUs; i++)
      PCPProcessList_deriveCPUTime(this->percpu[i]);

   if (settings->showCPUFrequency)
      PCPProcessList_updatePerCPUReal(this, PCP_HINV_CPUCLOCK, CPU_FREQUENCY);

   PCPProcessList_scanZfsArcstats(this);
}

void ProcessList_goThroughEntries(ProcessList* super, bool pauseProcessUpdate) {
   PCPProcessList* this = (PCPProcessList*) super;
   const Settings* settings = super->settings;
   bool enabled = !pauseProcessUpdate;

   bool flagged = settings->showCPUFrequency;
   PCPMetric_enable(PCP_HINV_CPUCLOCK, flagged);

   /* In pause mode do not sample per-process metric values at all */
   for (int metric = PCP_PROC_PID; metric < PCP_METRIC_COUNT; metric++)
      PCPMetric_enable(metric, enabled);

   flagged = settings->flags & PROCESS_FLAG_LINUX_CGROUP;
   PCPMetric_enable(PCP_PROC_CGROUPS, flagged && enabled);
   flagged = settings->flags & PROCESS_FLAG_LINUX_OOM;
   PCPMetric_enable(PCP_PROC_OOMSCORE, flagged && enabled);
   flagged = settings->flags & PROCESS_FLAG_LINUX_CTXT;
   PCPMetric_enable(PCP_PROC_VCTXSW, flagged && enabled);
   PCPMetric_enable(PCP_PROC_NVCTXSW, flagged && enabled);
   flagged = settings->flags & PROCESS_FLAG_LINUX_SECATTR;
   PCPMetric_enable(PCP_PROC_LABELS, flagged && enabled);
   flagged = settings->flags & PROCESS_FLAG_LINUX_AUTOGROUP;
   PCPMetric_enable(PCP_PROC_AUTOGROUP_ID, flagged && enabled);
   PCPMetric_enable(PCP_PROC_AUTOGROUP_NICE, flagged && enabled);

   /* Sample smaps metrics on every second pass to improve performance */
   static int smaps_flag;
   smaps_flag = !!smaps_flag;
   PCPMetric_enable(PCP_PROC_SMAPS_PSS, smaps_flag && enabled);
   PCPMetric_enable(PCP_PROC_SMAPS_SWAP, smaps_flag && enabled);
   PCPMetric_enable(PCP_PROC_SMAPS_SWAPPSS, smaps_flag && enabled);

   struct timeval timestamp;
   if (PCPMetric_fetch(&timestamp) != true)
      return;

   double sample = this->timestamp;
   this->timestamp = pmtimevalToReal(&timestamp);

   PCPProcessList_updateHeader(super, settings);

   /* In pause mode only update global data for meters (CPU, memory, etc) */
   if (pauseProcessUpdate)
      return;

   double period = (this->timestamp - sample) * 100;
   PCPProcessList_updateProcesses(this, period, &timestamp);
}

bool ProcessList_isCPUonline(const ProcessList* super, unsigned int id) {
   assert(id < super->existingCPUs);
   (void) super;

   pmAtomValue value;
   if (PCPMetric_instance(PCP_PERCPU_SYSTEM, id, id, &value, PM_TYPE_U32))
      return true;
   return false;
}

© 2014-2022 Faster IT GmbH | imprint | privacy policy