aboutsummaryrefslogtreecommitdiffstats
path: root/netbsd/NetBSDProcessList.c
blob: 379a491bad7890c354a6ccadb4113f0b778e06f7 (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
/*
htop - NetBSDProcessList.c
(C) 2014 Hisham H. Muhammad
(C) 2015 Michael McConville
(C) 2021 Santhosh Raju
(C) 2021 htop dev team
Released under the GNU GPLv2+, see the COPYING file
in the source distribution for its full text.
*/

#include "netbsd/NetBSDProcessList.h"

#include <kvm.h>
#include <math.h>
#include <limits.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/mount.h>
#include <sys/param.h>
#include <sys/proc.h>
#include <sys/sched.h>
#include <sys/swap.h>
#include <sys/sysctl.h>
#include <sys/types.h>
#include <uvm/uvm_extern.h>

#include "CRT.h"
#include "Macros.h"
#include "Object.h"
#include "Process.h"
#include "ProcessList.h"
#include "Settings.h"
#include "XUtils.h"
#include "netbsd/NetBSDProcess.h"


static long fscale;
static int pageSize;
static int pageSizeKB;

static const struct {
   const char* name;
   long int scale;
} freqSysctls[] = {
   { "machdep.est.frequency.current",            1 },
   { "machdep.powernow.frequency.current",       1 },
   { "machdep.intrepid.frequency.current",       1 },
   { "machdep.loongson.frequency.current",       1 },
   { "machdep.cpu.frequency.current",            1 },
   { "machdep.frequency.current",                1 },
   { "machdep.tsc_freq",                   1000000 },
};

static void NetBSDProcessList_updateCPUcount(ProcessList* super) {
   NetBSDProcessList* opl = (NetBSDProcessList*) super;

   // Definitions for sysctl(3), cf. https://nxr.netbsd.org/xref/src/sys/sys/sysctl.h#813
   const int mib_ncpu_existing[] = { CTL_HW, HW_NCPU }; // Number of existing CPUs
   const int mib_ncpu_online[] = { CTL_HW, HW_NCPUONLINE }; // Number of online/active CPUs

   int r;
   unsigned int value;
   size_t size;

   bool change = false;

   // Query the number of active/online CPUs.
   size = sizeof(value);
   r = sysctl(mib_ncpu_online, 2, &value, &size, NULL, 0);
   if (r < 0 || value < 1) {
      value = 1;
   }

   if (value != super->activeCPUs) {
      super->activeCPUs = value;
      change = true;
   }

   // Query the total number of CPUs.
   size = sizeof(value);
   r = sysctl(mib_ncpu_existing, 2, &value, &size, NULL, 0);
   if (r < 0 || value < 1) {
      value = super->activeCPUs;
   }

   if (value != super->existingCPUs) {
      opl->cpuData = xReallocArray(opl->cpuData, value + 1, sizeof(CPUData));
      super->existingCPUs = value;
      change = true;
   }

   // Reset CPU stats when number of online/existing CPU cores changed
   if (change) {
      CPUData* dAvg = &opl->cpuData[0];
      memset(dAvg, '\0', sizeof(CPUData));
      dAvg->totalTime = 1;
      dAvg->totalPeriod = 1;

      for (unsigned int i = 0; i < super->existingCPUs; i++) {
         CPUData* d = &opl->cpuData[i + 1];
         memset(d, '\0', sizeof(CPUData));
         d->totalTime = 1;
         d->totalPeriod = 1;
      }
   }
}

ProcessList* ProcessList_new(UsersTable* usersTable, Hashtable* dynamicMeters, Hashtable* dynamicColumns, Hashtable* pidMatchList, uid_t userId) {
   const int fmib[] = { CTL_KERN, KERN_FSCALE };
   size_t size;
   char errbuf[_POSIX2_LINE_MAX];

   NetBSDProcessList* npl = xCalloc(1, sizeof(NetBSDProcessList));
   ProcessList* pl = (ProcessList*) npl;
   ProcessList_init(pl, Class(NetBSDProcess), usersTable, dynamicMeters, dynamicColumns, pidMatchList, userId);

   NetBSDProcessList_updateCPUcount(pl);

   size = sizeof(fscale);
   if (sysctl(fmib, 2, &fscale, &size, NULL, 0) < 0) {
      CRT_fatalError("fscale sysctl call failed");
   }

   if ((pageSize = sysconf(_SC_PAGESIZE)) == -1)
      CRT_fatalError("pagesize sysconf call failed");
   pageSizeKB = pageSize / ONE_K;

   npl->kd = kvm_openfiles(NULL, NULL, NULL, KVM_NO_FILES, errbuf);
   if (npl->kd == NULL) {
      CRT_fatalError("kvm_openfiles() failed");
   }

   return pl;
}

void ProcessList_delete(ProcessList* this) {
   NetBSDProcessList* npl = (NetBSDProcessList*) this;

   if (npl->kd) {
      kvm_close(npl->kd);
   }

   free(npl->cpuData);

   ProcessList_done(this);
   free(this);
}

static void NetBSDProcessList_scanMemoryInfo(ProcessList* pl) {
   static int uvmexp_mib[] = {CTL_VM, VM_UVMEXP2};
   struct uvmexp_sysctl uvmexp;
   size_t size_uvmexp = sizeof(uvmexp);

   if (sysctl(uvmexp_mib, 2, &uvmexp, &size_uvmexp, NULL, 0) < 0) {
      CRT_fatalError("uvmexp sysctl call failed");
   }

   pl->totalMem = uvmexp.npages * pageSizeKB;
   pl->buffersMem = 0;
   pl->cachedMem = (uvmexp.filepages + uvmexp.execpages) * pageSizeKB;
   pl->usedMem = (uvmexp.active + uvmexp.wired) * pageSizeKB;
   pl->totalSwap = uvmexp.swpages * pageSizeKB;
   pl->usedSwap = uvmexp.swpginuse * pageSizeKB;
}

static void NetBSDProcessList_updateExe(const struct kinfo_proc2* kproc, Process* proc) {
   const int mib[] = { CTL_KERN, KERN_PROC_ARGS, kproc->p_pid, KERN_PROC_PATHNAME };
   char buffer[2048];
   size_t size = sizeof(buffer);
   if (sysctl(mib, 4, buffer, &size, NULL, 0) != 0) {
      Process_updateExe(proc, NULL);
      return;
   }

   /* Kernel threads return an empty buffer */
   if (buffer[0] == '\0') {
      Process_updateExe(proc, NULL);
      return;
   }

   Process_updateExe(proc, buffer);
}

static void NetBSDProcessList_updateCwd(const struct kinfo_proc2* kproc, Process* proc) {
   const int mib[] = { CTL_KERN, KERN_PROC_ARGS, kproc->p_pid, KERN_PROC_CWD };
   char buffer[2048];
   size_t size = sizeof(buffer);
   if (sysctl(mib, 4, buffer, &size, NULL, 0) != 0) {
      free(proc->procCwd);
      proc->procCwd = NULL;
      return;
   }

   /* Kernel threads return an empty buffer */
   if (buffer[0] == '\0') {
      free(proc->procCwd);
      proc->procCwd = NULL;
      return;
   }

   free_and_xStrdup(&proc->procCwd, buffer);
}

static void NetBSDProcessList_updateProcessName(kvm_t* kd, const struct kinfo_proc2* kproc, Process* proc) {
   Process_updateComm(proc, kproc->p_comm);

   /*
    * Like NetBSD's top(1), we try to fall back to the command name
    * (argv[0]) if we fail to construct the full command.
    */
   char** arg = kvm_getargv2(kd, kproc, 500);
   if (arg == NULL || *arg == NULL) {
      Process_updateCmdline(proc, kproc->p_comm, 0, strlen(kproc->p_comm));
      return;
   }

   size_t len = 0;
   for (int i = 0; arg[i] != NULL; i++) {
      len += strlen(arg[i]) + 1;   /* room for arg and trailing space or NUL */
   }

   /* don't use xMalloc here - we want to handle huge argv's gracefully */
   char* s;
   if ((s = malloc(len)) == NULL) {
      Process_updateCmdline(proc, kproc->p_comm, 0, strlen(kproc->p_comm));
      return;
   }

   *s = '\0';

   int start = 0;
   int end = 0;
   for (int i = 0; arg[i] != NULL; i++) {
      size_t n = strlcat(s, arg[i], len);
      if (i == 0) {
         end = MINIMUM(n, len - 1);
         /* check if cmdline ended earlier, e.g 'kdeinit5: Running...' */
         for (int j = end; j > 0; j--) {
            if (arg[0][j] == ' ' && arg[0][j - 1] != '\\') {
               end = (arg[0][j - 1] == ':') ? (j - 1) : j;
            }
         }
      }
      /* the trailing space should get truncated anyway */
      strlcat(s, " ", len);
   }

   Process_updateCmdline(proc, s, start, end);

   free(s);
}

/*
 * Borrowed with modifications from NetBSD's top(1).
 */
static double getpcpu(const struct kinfo_proc2* kp) {
   if (fscale == 0)
      return 0.0;

   return 100.0 * (double)kp->p_pctcpu / fscale;
}

static void NetBSDProcessList_scanProcs(NetBSDProcessList* this) {
   const Settings* settings = this->super.settings;
   bool hideKernelThreads = settings->hideKernelThreads;
   bool hideUserlandThreads = settings->hideUserlandThreads;
   int count = 0;

   const struct kinfo_proc2* kprocs = kvm_getproc2(this->kd, KERN_PROC_ALL, 0, sizeof(struct kinfo_proc2), &count);

   for (int i = 0; i < count; i++) {
      const struct kinfo_proc2* kproc = &kprocs[i];

      bool preExisting = false;
      Process* proc = ProcessList_getProcess(&this->super, kproc->p_pid, &preExisting, NetBSDProcess_new);

      proc->show = ! ((hideKernelThreads && Process_isKernelThread(proc)) || (hideUserlandThreads && Process_isUserlandThread(proc)));

      if (!preExisting) {
         proc->pid = kproc->p_pid;
         proc->ppid = kproc->p_ppid;
         proc->tpgid = kproc->p_tpgid;
         proc->tgid = kproc->p_pid;
         proc->session = kproc->p_sid;
         proc->pgrp = kproc->p__pgid;
         proc->isKernelThread = !!(kproc->p_flag & P_SYSTEM);
         proc->isUserlandThread = proc->pid != proc->tgid;
         proc->starttime_ctime = kproc->p_ustart_sec;
         Process_fillStarttimeBuffer(proc);
         ProcessList_add(&this->super, proc);

         proc->tty_nr = kproc->p_tdev;
         const char* name = ((dev_t)kproc->p_tdev != KERN_PROC_TTY_NODEV) ? devname(kproc->p_tdev, S_IFCHR) : NULL;
         if (!name) {
            free(proc->tty_name);
            proc->tty_name = NULL;
         } else {
            free_and_xStrdup(&proc->tty_name, name);
         }

         NetBSDProcessList_updateExe(kproc, proc);
         NetBSDProcessList_updateProcessName(this->kd, kproc, proc);
      } else {
         if (settings->updateProcessNames) {
            NetBSDProcessList_updateProcessName(this->kd, kproc, proc);
         }
      }

      if (settings->flags & PROCESS_FLAG_CWD) {
         NetBSDProcessList_updateCwd(kproc, proc);
      }

      if (proc->st_uid != kproc->p_uid) {
         proc->st_uid = kproc->p_uid;
         proc->user = UsersTable_getRef(this->super.usersTable, proc->st_uid);
      }

      proc->m_virt = kproc->p_vm_vsize;
      proc->m_resident = kproc->p_vm_rssize;
      proc->percent_mem = (proc->m_resident * pageSizeKB) / (double)(this->super.totalMem) * 100.0;
      proc->percent_cpu = CLAMP(getpcpu(kproc), 0.0, this->super.activeCPUs * 100.0);
      proc->nlwp = kproc->p_nlwps;
      proc->nice = kproc->p_nice - 20;
      proc->time = 100 * (kproc->p_rtime_sec + ((kproc->p_rtime_usec + 500000) / 1000000));
      proc->priority = kproc->p_priority - PZERO;
      proc->processor = kproc->p_cpuid;
      proc->minflt = kproc->p_uru_minflt;
      proc->majflt = kproc->p_uru_majflt;

      int nlwps = 0;
      const struct kinfo_lwp* klwps = kvm_getlwps(this->kd, kproc->p_pid, kproc->p_paddr, sizeof(struct kinfo_lwp), &nlwps);

      switch (kproc->p_realstat) {
      case SIDL:     proc->state = 'I'; break;
      case SACTIVE:
         // We only consider the first LWP with a one of the below states.
         for (int j = 0; j < nlwps; j++) {
            if (klwps) {
               switch (klwps[j].l_stat) {
               case LSONPROC: proc->state = 'P'; break;
               case LSRUN:    proc->state = 'R'; break;
               case LSSLEEP:  proc->state = 'S'; break;
               case LSSTOP:   proc->state = 'T'; break;
               default:       proc->state = '?';
               }
               if (proc->state != '?')
                  break;
            } else {
               proc->state = '?';
               break;
            }
         }
         break;
      case SSTOP:    proc->state = 'T'; break;
      case SZOMB:    proc->state = 'Z'; break;
      case SDEAD:    proc->state = 'D'; break;
      default:       proc->state = '?';
      }

      if (Process_isKernelThread(proc)) {
         this->super.kernelThreads++;
      } else if (Process_isUserlandThread(proc)) {
         this->super.userlandThreads++;
      }

      this->super.totalTasks++;
      // SRUN ('R') means runnable, not running
      if (proc->state == 'P') {
         this->super.runningTasks++;
      }
      proc->updated = true;
   }
}

static void getKernelCPUTimes(int cpuId, u_int64_t* times) {
   const int mib[] = { CTL_KERN, KERN_CP_TIME, cpuId };
   size_t length = sizeof(*times) * CPUSTATES;
   if (sysctl(mib, 3, times, &length, NULL, 0) == -1 || length != sizeof(*times) * CPUSTATES) {
      CRT_fatalError("sysctl kern.cp_time2 failed");
   }
}

static void kernelCPUTimesToHtop(const u_int64_t* times, CPUData* cpu) {
   unsigned long long totalTime = 0;
   for (int i = 0; i < CPUSTATES; i++) {
      totalTime += times[i];
   }

   unsigned long long sysAllTime = times[CP_INTR] + times[CP_SYS];

   cpu->totalPeriod = saturatingSub(totalTime, cpu->totalTime);
   cpu->userPeriod = saturatingSub(times[CP_USER], cpu->userTime);
   cpu->nicePeriod = saturatingSub(times[CP_NICE], cpu->niceTime);
   cpu->sysPeriod = saturatingSub(times[CP_SYS], cpu->sysTime);
   cpu->sysAllPeriod = saturatingSub(sysAllTime, cpu->sysAllTime);
   cpu->intrPeriod = saturatingSub(times[CP_INTR], cpu->intrTime);
   cpu->idlePeriod = saturatingSub(times[CP_IDLE], cpu->idleTime);

   cpu->totalTime = totalTime;
   cpu->userTime = times[CP_USER];
   cpu->niceTime = times[CP_NICE];
   cpu->sysTime = times[CP_SYS];
   cpu->sysAllTime = sysAllTime;
   cpu->intrTime = times[CP_INTR];
   cpu->idleTime = times[CP_IDLE];
}

static void NetBSDProcessList_scanCPUTime(NetBSDProcessList* this) {
   u_int64_t kernelTimes[CPUSTATES] = {0};
   u_int64_t avg[CPUSTATES] = {0};

   for (unsigned int i = 0; i < this->super.existingCPUs; i++) {
      getKernelCPUTimes(i, kernelTimes);
      CPUData* cpu = &this->cpuData[i + 1];
      kernelCPUTimesToHtop(kernelTimes, cpu);

      avg[CP_USER] += cpu->userTime;
      avg[CP_NICE] += cpu->niceTime;
      avg[CP_SYS] += cpu->sysTime;
      avg[CP_INTR] += cpu->intrTime;
      avg[CP_IDLE] += cpu->idleTime;
   }

   for (int i = 0; i < CPUSTATES; i++) {
      avg[i] /= this->super.activeCPUs;
   }

   kernelCPUTimesToHtop(avg, &this->cpuData[0]);
}

static void NetBSDProcessList_scanCPUFrequency(NetBSDProcessList* this) {
   unsigned int cpus = this->super.existingCPUs;
   bool match = false;
   char name[64];
   long int freq = 0;
   size_t freqSize;

   for (unsigned int i = 0; i < cpus; i++) {
      this->cpuData[i + 1].frequency = NAN;
   }

   /* newer hardware supports per-core frequency, for e.g. ARM big.LITTLE */
   for (unsigned int i = 0; i < cpus; i++) {
      xSnprintf(name, sizeof(name), "machdep.cpufreq.cpu%u.current", i);
      freqSize = sizeof(freq);
      if (sysctlbyname(name, &freq, &freqSize, NULL, 0) != -1) {
         this->cpuData[i + 1].frequency = freq; /* already in MHz */
         match = true;
      }
   }

   if (match) {
      return;
   }

   /*
    * Iterate through legacy sysctl nodes for single-core frequency until
    * we find a match...
    */
   for (size_t i = 0; i < ARRAYSIZE(freqSysctls); i++) {
      freqSize = sizeof(freq);
      if (sysctlbyname(freqSysctls[i].name, &freq, &freqSize, NULL, 0) != -1) {
         freq /= freqSysctls[i].scale; /* scale to MHz */
         match = true;
         break;
      }
   }

   if (match) {
      for (unsigned int i = 0; i < cpus; i++) {
         this->cpuData[i + 1].frequency = freq;
      }
   }
}

void ProcessList_goThroughEntries(ProcessList* super, bool pauseProcessUpdate) {
   NetBSDProcessList* npl = (NetBSDProcessList*) super;

   NetBSDProcessList_scanMemoryInfo(super);
   NetBSDProcessList_scanCPUTime(npl);

   if (super->settings->showCPUFrequency) {
      NetBSDProcessList_scanCPUFrequency(npl);
   }

   // in pause mode only gather global data for meters (CPU/memory/...)
   if (pauseProcessUpdate) {
      return;
   }

   NetBSDProcessList_scanProcs(npl);
}

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

   // TODO: Support detecting online / offline CPUs.
   return true;
}

© 2014-2024 Faster IT GmbH | imprint | privacy policy