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Diffstat (limited to 'src/util/os_load.c')
-rw-r--r-- | src/util/os_load.c | 653 |
1 files changed, 653 insertions, 0 deletions
diff --git a/src/util/os_load.c b/src/util/os_load.c new file mode 100644 index 000000000..d1115e33f --- /dev/null +++ b/src/util/os_load.c | |||
@@ -0,0 +1,653 @@ | |||
1 | /* | ||
2 | This file is part of GNUnet. | ||
3 | (C) 2001, 2002, 2003, 2005, 2006 Christian Grothoff (and other contributing authors) | ||
4 | |||
5 | GNUnet is free software; you can redistribute it and/or modify | ||
6 | it under the terms of the GNU General Public License as published | ||
7 | by the Free Software Foundation; either version 2, or (at your | ||
8 | option) any later version. | ||
9 | |||
10 | GNUnet is distributed in the hope that it will be useful, but | ||
11 | WITHOUT ANY WARRANTY; without even the implied warranty of | ||
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
13 | General Public License for more details. | ||
14 | |||
15 | You should have received a copy of the GNU General Public License | ||
16 | along with GNUnet; see the file COPYING. If not, write to the | ||
17 | Free Software Foundation, Inc., 59 Temple Place - Suite 330, | ||
18 | Boston, MA 02111-1307, USA. | ||
19 | */ | ||
20 | |||
21 | /** | ||
22 | * @file util/os_load_cpu.c | ||
23 | * @brief calls to determine current CPU load | ||
24 | * @author Tzvetan Horozov | ||
25 | * @author Christian Grothoff | ||
26 | * @author Igor Wronsky | ||
27 | * @author Alex Harper (OS X portion) | ||
28 | */ | ||
29 | |||
30 | #include "platform.h" | ||
31 | #include "gnunet_common.h" | ||
32 | #include "gnunet_os_lib.h" | ||
33 | #include "gnunet_strings_lib.h" | ||
34 | |||
35 | #if SOLARIS | ||
36 | #if HAVE_KSTAT_H | ||
37 | #include <kstat.h> | ||
38 | #endif | ||
39 | #if HAVE_SYS_SYSINFO_H | ||
40 | #include <sys/sysinfo.h> | ||
41 | #endif | ||
42 | #if HAVE_KVM_H | ||
43 | #include <kvm.h> | ||
44 | #endif | ||
45 | #endif | ||
46 | #if SOMEBSD | ||
47 | #if HAVE_KVM_H | ||
48 | #include <kvm.h> | ||
49 | #endif | ||
50 | #endif | ||
51 | |||
52 | #ifdef OSX | ||
53 | #include <mach/mach.h> | ||
54 | |||
55 | static processor_cpu_load_info_t prev_cpu_load; | ||
56 | #endif | ||
57 | |||
58 | #define DEBUG_STATUSCALLS GNUNET_NO | ||
59 | |||
60 | #ifdef LINUX | ||
61 | static FILE *proc_stat; | ||
62 | #endif | ||
63 | |||
64 | /** | ||
65 | * Current CPU load, as percentage of CPU cycles not idle or | ||
66 | * blocked on IO. | ||
67 | */ | ||
68 | static int currentCPULoad; | ||
69 | |||
70 | static double agedCPULoad = -1; | ||
71 | |||
72 | /** | ||
73 | * Current IO load, as percentage of CPU cycles blocked on IO. | ||
74 | */ | ||
75 | static int currentIOLoad; | ||
76 | |||
77 | static double agedIOLoad = -1; | ||
78 | |||
79 | #ifdef OSX | ||
80 | static int | ||
81 | initMachCpuStats () | ||
82 | { | ||
83 | unsigned int cpu_count; | ||
84 | processor_cpu_load_info_t cpu_load; | ||
85 | mach_msg_type_number_t cpu_msg_count; | ||
86 | kern_return_t kret; | ||
87 | int i, j; | ||
88 | |||
89 | kret = host_processor_info (mach_host_self (), | ||
90 | PROCESSOR_CPU_LOAD_INFO, | ||
91 | &cpu_count, | ||
92 | (processor_info_array_t *) & cpu_load, | ||
93 | &cpu_msg_count); | ||
94 | if (kret != KERN_SUCCESS) | ||
95 | { | ||
96 | GNUNET_log (GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK, | ||
97 | "host_processor_info failed."); | ||
98 | return GNUNET_SYSERR; | ||
99 | } | ||
100 | prev_cpu_load = GNUNET_malloc (cpu_count * sizeof (*prev_cpu_load)); | ||
101 | for (i = 0; i < cpu_count; i++) | ||
102 | { | ||
103 | for (j = 0; j < CPU_STATE_MAX; j++) | ||
104 | { | ||
105 | prev_cpu_load[i].cpu_ticks[j] = cpu_load[i].cpu_ticks[j]; | ||
106 | } | ||
107 | } | ||
108 | vm_deallocate (mach_task_self (), | ||
109 | (vm_address_t) cpu_load, | ||
110 | (vm_size_t) (cpu_msg_count * sizeof (*cpu_load))); | ||
111 | return GNUNET_OK; | ||
112 | } | ||
113 | #endif | ||
114 | |||
115 | /** | ||
116 | * Update the currentCPU and currentIO load values. | ||
117 | * | ||
118 | * Before its first invocation the method initStatusCalls() must be called. | ||
119 | * If there is an error the method returns -1. | ||
120 | */ | ||
121 | static int | ||
122 | updateUsage () | ||
123 | { | ||
124 | currentIOLoad = -1; | ||
125 | currentCPULoad = -1; | ||
126 | #ifdef LINUX | ||
127 | /* under linux, first try %idle/usage using /proc/stat; | ||
128 | if that does not work, disable /proc/stat for the future | ||
129 | by closing the file and use the next-best method. */ | ||
130 | if (proc_stat != NULL) | ||
131 | { | ||
132 | static unsigned long long last_cpu_results[5] = { 0, 0, 0, 0, 0 }; | ||
133 | static int have_last_cpu = GNUNET_NO; | ||
134 | int ret; | ||
135 | char line[256]; | ||
136 | unsigned long long user_read, system_read, nice_read, idle_read, | ||
137 | iowait_read; | ||
138 | unsigned long long user, system, nice, idle, iowait; | ||
139 | unsigned long long usage_time = 0, total_time = 1; | ||
140 | |||
141 | /* Get the first line with the data */ | ||
142 | rewind (proc_stat); | ||
143 | fflush (proc_stat); | ||
144 | if (NULL == fgets (line, 256, proc_stat)) | ||
145 | { | ||
146 | GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR | | ||
147 | GNUNET_ERROR_TYPE_BULK, | ||
148 | "fgets", "/proc/stat"); | ||
149 | fclose (proc_stat); | ||
150 | proc_stat = NULL; /* don't try again */ | ||
151 | } | ||
152 | else | ||
153 | { | ||
154 | iowait_read = 0; | ||
155 | ret = sscanf (line, "%*s %llu %llu %llu %llu %llu", | ||
156 | &user_read, | ||
157 | &system_read, &nice_read, &idle_read, &iowait_read); | ||
158 | if (ret < 4) | ||
159 | { | ||
160 | GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR | | ||
161 | GNUNET_ERROR_TYPE_BULK, | ||
162 | "fgets-sscanf", "/proc/stat"); | ||
163 | fclose (proc_stat); | ||
164 | proc_stat = NULL; /* don't try again */ | ||
165 | have_last_cpu = GNUNET_NO; | ||
166 | } | ||
167 | else | ||
168 | { | ||
169 | /* Store the current usage */ | ||
170 | user = user_read - last_cpu_results[0]; | ||
171 | system = system_read - last_cpu_results[1]; | ||
172 | nice = nice_read - last_cpu_results[2]; | ||
173 | idle = idle_read - last_cpu_results[3]; | ||
174 | iowait = iowait_read - last_cpu_results[4]; | ||
175 | /* Calculate the % usage */ | ||
176 | usage_time = user + system + nice; | ||
177 | total_time = usage_time + idle + iowait; | ||
178 | if ((total_time > 0) && (have_last_cpu == GNUNET_YES)) | ||
179 | { | ||
180 | currentCPULoad = (int) (100L * usage_time / total_time); | ||
181 | if (ret > 4) | ||
182 | currentIOLoad = (int) (100L * iowait / total_time); | ||
183 | else | ||
184 | currentIOLoad = -1; /* 2.4 kernel */ | ||
185 | } | ||
186 | /* Store the values for the next calculation */ | ||
187 | last_cpu_results[0] = user_read; | ||
188 | last_cpu_results[1] = system_read; | ||
189 | last_cpu_results[2] = nice_read; | ||
190 | last_cpu_results[3] = idle_read; | ||
191 | last_cpu_results[4] = iowait_read; | ||
192 | have_last_cpu = GNUNET_YES; | ||
193 | return GNUNET_OK; | ||
194 | } | ||
195 | } | ||
196 | } | ||
197 | #endif | ||
198 | |||
199 | #ifdef OSX | ||
200 | { | ||
201 | unsigned int cpu_count; | ||
202 | processor_cpu_load_info_t cpu_load; | ||
203 | mach_msg_type_number_t cpu_msg_count; | ||
204 | unsigned long long t_sys, t_user, t_nice, t_idle, t_total; | ||
205 | unsigned long long t_idle_all, t_total_all; | ||
206 | kern_return_t kret; | ||
207 | int i, j; | ||
208 | |||
209 | t_idle_all = t_total_all = 0; | ||
210 | kret = host_processor_info (mach_host_self (), PROCESSOR_CPU_LOAD_INFO, | ||
211 | &cpu_count, | ||
212 | (processor_info_array_t *) & cpu_load, | ||
213 | &cpu_msg_count); | ||
214 | if (kret == KERN_SUCCESS) | ||
215 | { | ||
216 | for (i = 0; i < cpu_count; i++) | ||
217 | { | ||
218 | if (cpu_load[i].cpu_ticks[CPU_STATE_SYSTEM] >= | ||
219 | prev_cpu_load[i].cpu_ticks[CPU_STATE_SYSTEM]) | ||
220 | { | ||
221 | t_sys = cpu_load[i].cpu_ticks[CPU_STATE_SYSTEM] - | ||
222 | prev_cpu_load[i].cpu_ticks[CPU_STATE_SYSTEM]; | ||
223 | } | ||
224 | else | ||
225 | { | ||
226 | t_sys = cpu_load[i].cpu_ticks[CPU_STATE_SYSTEM] + | ||
227 | (ULONG_MAX - prev_cpu_load[i].cpu_ticks[CPU_STATE_SYSTEM] + | ||
228 | 1); | ||
229 | } | ||
230 | |||
231 | if (cpu_load[i].cpu_ticks[CPU_STATE_USER] >= | ||
232 | prev_cpu_load[i].cpu_ticks[CPU_STATE_USER]) | ||
233 | { | ||
234 | t_user = cpu_load[i].cpu_ticks[CPU_STATE_USER] - | ||
235 | prev_cpu_load[i].cpu_ticks[CPU_STATE_USER]; | ||
236 | } | ||
237 | else | ||
238 | { | ||
239 | t_user = cpu_load[i].cpu_ticks[CPU_STATE_USER] + | ||
240 | (ULONG_MAX - prev_cpu_load[i].cpu_ticks[CPU_STATE_USER] + | ||
241 | 1); | ||
242 | } | ||
243 | |||
244 | if (cpu_load[i].cpu_ticks[CPU_STATE_NICE] >= | ||
245 | prev_cpu_load[i].cpu_ticks[CPU_STATE_NICE]) | ||
246 | { | ||
247 | t_nice = cpu_load[i].cpu_ticks[CPU_STATE_NICE] - | ||
248 | prev_cpu_load[i].cpu_ticks[CPU_STATE_NICE]; | ||
249 | } | ||
250 | else | ||
251 | { | ||
252 | t_nice = cpu_load[i].cpu_ticks[CPU_STATE_NICE] + | ||
253 | (ULONG_MAX - prev_cpu_load[i].cpu_ticks[CPU_STATE_NICE] + | ||
254 | 1); | ||
255 | } | ||
256 | |||
257 | if (cpu_load[i].cpu_ticks[CPU_STATE_IDLE] >= | ||
258 | prev_cpu_load[i].cpu_ticks[CPU_STATE_IDLE]) | ||
259 | { | ||
260 | t_idle = cpu_load[i].cpu_ticks[CPU_STATE_IDLE] - | ||
261 | prev_cpu_load[i].cpu_ticks[CPU_STATE_IDLE]; | ||
262 | } | ||
263 | else | ||
264 | { | ||
265 | t_idle = cpu_load[i].cpu_ticks[CPU_STATE_IDLE] + | ||
266 | (ULONG_MAX - prev_cpu_load[i].cpu_ticks[CPU_STATE_IDLE] + | ||
267 | 1); | ||
268 | } | ||
269 | t_total = t_sys + t_user + t_nice + t_idle; | ||
270 | t_idle_all += t_idle; | ||
271 | t_total_all += t_total; | ||
272 | } | ||
273 | for (i = 0; i < cpu_count; i++) | ||
274 | { | ||
275 | for (j = 0; j < CPU_STATE_MAX; j++) | ||
276 | { | ||
277 | prev_cpu_load[i].cpu_ticks[j] = cpu_load[i].cpu_ticks[j]; | ||
278 | } | ||
279 | } | ||
280 | if (t_total_all > 0) | ||
281 | currentCPULoad = 100 - (100 * t_idle_all) / t_total_all; | ||
282 | else | ||
283 | currentCPULoad = -1; | ||
284 | vm_deallocate (mach_task_self (), | ||
285 | (vm_address_t) cpu_load, | ||
286 | (vm_size_t) (cpu_msg_count * sizeof (*cpu_load))); | ||
287 | currentIOLoad = -1; /* FIXME-OSX! */ | ||
288 | return GNUNET_OK; | ||
289 | } | ||
290 | else | ||
291 | { | ||
292 | GNUNET_log (GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK, | ||
293 | "host_processor_info failed."); | ||
294 | return GNUNET_SYSERR; | ||
295 | } | ||
296 | } | ||
297 | #endif | ||
298 | /* try kstat (Solaris only) */ | ||
299 | #if SOLARIS && HAVE_KSTAT_H && HAVE_SYS_SYSINFO_H | ||
300 | { | ||
301 | static long long last_idlecount; | ||
302 | static long long last_totalcount; | ||
303 | static int kstat_once; /* if open fails, don't keep | ||
304 | trying */ | ||
305 | kstat_ctl_t *kc; | ||
306 | kstat_t *khelper; | ||
307 | long long idlecount; | ||
308 | long long totalcount; | ||
309 | long long deltaidle; | ||
310 | long long deltatotal; | ||
311 | |||
312 | if (kstat_once == 1) | ||
313 | goto ABORT_KSTAT; | ||
314 | kc = kstat_open (); | ||
315 | if (kc == NULL) | ||
316 | { | ||
317 | GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK, | ||
318 | "kstat_open"); | ||
319 | goto ABORT_KSTAT; | ||
320 | } | ||
321 | |||
322 | idlecount = 0; | ||
323 | totalcount = 0; | ||
324 | for (khelper = kc->kc_chain; khelper != NULL; khelper = khelper->ks_next) | ||
325 | { | ||
326 | cpu_stat_t stats; | ||
327 | |||
328 | if (0 != strncmp (khelper->ks_name, "cpu_stat", strlen ("cpu_stat"))) | ||
329 | continue; | ||
330 | if (khelper->ks_data_size > sizeof (cpu_stat_t)) | ||
331 | continue; /* better save then sorry! */ | ||
332 | if (-1 != kstat_read (kc, khelper, &stats)) | ||
333 | { | ||
334 | idlecount += stats.cpu_sysinfo.cpu[CPU_IDLE]; | ||
335 | totalcount | ||
336 | += stats.cpu_sysinfo.cpu[CPU_IDLE] + | ||
337 | stats.cpu_sysinfo.cpu[CPU_USER] + | ||
338 | stats.cpu_sysinfo.cpu[CPU_KERNEL] + | ||
339 | stats.cpu_sysinfo.cpu[CPU_WAIT]; | ||
340 | } | ||
341 | } | ||
342 | if (0 != kstat_close (kc)) | ||
343 | GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK, | ||
344 | "kstat_close"); | ||
345 | if ((idlecount == 0) && (totalcount == 0)) | ||
346 | goto ABORT_KSTAT; /* no stats found => abort */ | ||
347 | deltaidle = idlecount - last_idlecount; | ||
348 | deltatotal = totalcount - last_totalcount; | ||
349 | if ((deltatotal > 0) && (last_totalcount > 0)) | ||
350 | { | ||
351 | currentCPULoad = (unsigned int) (100.0 * deltaidle / deltatotal); | ||
352 | if (currentCPULoad > 100) | ||
353 | currentCPULoad = 100; /* odd */ | ||
354 | if (currentCPULoad < 0) | ||
355 | currentCPULoad = 0; /* odd */ | ||
356 | currentCPULoad = 100 - currentCPULoad; /* computed idle-load before! */ | ||
357 | } | ||
358 | else | ||
359 | currentCPULoad = -1; | ||
360 | currentIOLoad = -1; /* FIXME-SOLARIS! */ | ||
361 | last_idlecount = idlecount; | ||
362 | last_totalcount = totalcount; | ||
363 | return GNUNET_OK; | ||
364 | ABORT_KSTAT: | ||
365 | kstat_once = 1; /* failed, don't try again */ | ||
366 | return GNUNET_SYSERR; | ||
367 | } | ||
368 | #endif | ||
369 | |||
370 | /* insert methods better than getloadavg for | ||
371 | other platforms HERE! */ | ||
372 | |||
373 | /* ok, maybe we have getloadavg on this platform */ | ||
374 | #if HAVE_GETLOADAVG | ||
375 | { | ||
376 | static int warnOnce = 0; | ||
377 | double loadavg; | ||
378 | if (1 != getloadavg (&loadavg, 1)) | ||
379 | { | ||
380 | /* only warn once, if there is a problem with | ||
381 | getloadavg, we're going to hit it frequently... */ | ||
382 | if (warnOnce == 0) | ||
383 | { | ||
384 | warnOnce = 1; | ||
385 | GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "getloadavg"); | ||
386 | } | ||
387 | return GNUNET_SYSERR; | ||
388 | } | ||
389 | else | ||
390 | { | ||
391 | /* success with getloadavg */ | ||
392 | currentCPULoad = (int) (100 * loadavg); | ||
393 | currentIOLoad = -1; /* FIXME */ | ||
394 | return GNUNET_OK; | ||
395 | } | ||
396 | } | ||
397 | #endif | ||
398 | |||
399 | #if MINGW | ||
400 | /* Win NT? */ | ||
401 | if (GNNtQuerySystemInformation) | ||
402 | { | ||
403 | static double dLastKernel; | ||
404 | static double dLastIdle; | ||
405 | static double dLastUser; | ||
406 | double dKernel; | ||
407 | double dIdle; | ||
408 | double dUser; | ||
409 | double dDiffKernel; | ||
410 | double dDiffIdle; | ||
411 | double dDiffUser; | ||
412 | SYSTEM_PROCESSOR_PERFORMANCE_INFORMATION theInfo; | ||
413 | |||
414 | if (GNNtQuerySystemInformation (SystemProcessorPerformanceInformation, | ||
415 | &theInfo, | ||
416 | sizeof (theInfo), NULL) == NO_ERROR) | ||
417 | { | ||
418 | /* PORT-ME MINGW: Multi-processor? */ | ||
419 | dKernel = Li2Double (theInfo.KernelTime); | ||
420 | dIdle = Li2Double (theInfo.IdleTime); | ||
421 | dUser = Li2Double (theInfo.UserTime); | ||
422 | dDiffKernel = dKernel - dLastKernel; | ||
423 | dDiffIdle = dIdle - dLastIdle; | ||
424 | dDiffUser = dUser - dLastUser; | ||
425 | |||
426 | if (((dDiffKernel + dDiffUser) > 0) && | ||
427 | (dLastIdle + dLastKernel + dLastUser > 0)) | ||
428 | currentCPULoad = | ||
429 | 100.0 - (dDiffIdle / (dDiffKernel + dDiffUser)) * 100.0; | ||
430 | else | ||
431 | currentCPULoad = -1; /* don't know (yet) */ | ||
432 | |||
433 | dLastKernel = dKernel; | ||
434 | dLastIdle = dIdle; | ||
435 | dLastUser = dUser; | ||
436 | |||
437 | currentIOLoad = -1; /* FIXME-MINGW */ | ||
438 | return GNUNET_OK; | ||
439 | } | ||
440 | else | ||
441 | { | ||
442 | /* only warn once, if there is a problem with | ||
443 | NtQuery..., we're going to hit it frequently... */ | ||
444 | static int once; | ||
445 | if (once == 0) | ||
446 | { | ||
447 | once = 1; | ||
448 | GNUNET_log (GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK, | ||
449 | _("Cannot query the CPU usage (Windows NT).\n")); | ||
450 | } | ||
451 | return GNUNET_SYSERR; | ||
452 | } | ||
453 | } | ||
454 | else | ||
455 | { /* Win 9x */ | ||
456 | HKEY hKey; | ||
457 | DWORD dwDataSize, dwType, dwDummy; | ||
458 | |||
459 | /* Start query */ | ||
460 | if (RegOpenKeyEx (HKEY_DYN_DATA, | ||
461 | "PerfStats\\StartSrv", | ||
462 | 0, KEY_ALL_ACCESS, &hKey) != ERROR_SUCCESS) | ||
463 | { | ||
464 | /* only warn once */ | ||
465 | static int once = 0; | ||
466 | if (once == 0) | ||
467 | { | ||
468 | once = 1; | ||
469 | GNUNET_log (GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK, | ||
470 | _("Cannot query the CPU usage (Win 9x)\n")); | ||
471 | } | ||
472 | } | ||
473 | |||
474 | RegOpenKeyEx (HKEY_DYN_DATA, | ||
475 | "PerfStats\\StartStat", 0, KEY_ALL_ACCESS, &hKey); | ||
476 | dwDataSize = sizeof (dwDummy); | ||
477 | RegQueryValueEx (hKey, | ||
478 | "KERNEL\\CPUUsage", | ||
479 | NULL, &dwType, (LPBYTE) & dwDummy, &dwDataSize); | ||
480 | RegCloseKey (hKey); | ||
481 | |||
482 | /* Get CPU usage */ | ||
483 | RegOpenKeyEx (HKEY_DYN_DATA, | ||
484 | "PerfStats\\StatData", 0, KEY_ALL_ACCESS, &hKey); | ||
485 | dwDataSize = sizeof (currentCPULoad); | ||
486 | RegQueryValueEx (hKey, | ||
487 | "KERNEL\\CPUUsage", | ||
488 | NULL, &dwType, (LPBYTE) & currentCPULoad, &dwDataSize); | ||
489 | RegCloseKey (hKey); | ||
490 | currentIOLoad = -1; /* FIXME-MINGW! */ | ||
491 | |||
492 | /* Stop query */ | ||
493 | RegOpenKeyEx (HKEY_DYN_DATA, | ||
494 | "PerfStats\\StopStat", 0, KEY_ALL_ACCESS, &hKey); | ||
495 | RegOpenKeyEx (HKEY_DYN_DATA, | ||
496 | "PerfStats\\StopSrv", 0, KEY_ALL_ACCESS, &hKey); | ||
497 | dwDataSize = sizeof (dwDummy); | ||
498 | RegQueryValueEx (hKey, | ||
499 | "KERNEL\\CPUUsage", | ||
500 | NULL, &dwType, (LPBYTE) & dwDummy, &dwDataSize); | ||
501 | RegCloseKey (hKey); | ||
502 | |||
503 | return GNUNET_OK; | ||
504 | } | ||
505 | #endif | ||
506 | |||
507 | /* loadaverage not defined and no platform | ||
508 | specific alternative defined | ||
509 | => default: error | ||
510 | */ | ||
511 | return GNUNET_SYSERR; | ||
512 | } | ||
513 | |||
514 | /** | ||
515 | * Update load values (if enough time has expired), | ||
516 | * including computation of averages. Code assumes | ||
517 | * that lock has already been obtained. | ||
518 | */ | ||
519 | static void | ||
520 | updateAgedLoad (struct GNUNET_CONFIGURATION_Handle *cfg) | ||
521 | { | ||
522 | static struct GNUNET_TIME_Absolute lastCall; | ||
523 | |||
524 | if ((agedCPULoad == -1) | ||
525 | || (GNUNET_TIME_absolute_get_duration (lastCall).value > 500)) | ||
526 | { | ||
527 | /* use smoothing, but do NOT update lastRet at frequencies higher | ||
528 | than 500ms; this makes the smoothing (mostly) independent from | ||
529 | the frequency at which getCPULoad is called (and we don't spend | ||
530 | more time measuring CPU than actually computing something). */ | ||
531 | lastCall = GNUNET_TIME_absolute_get (); | ||
532 | updateUsage (); | ||
533 | if (currentCPULoad == -1) | ||
534 | { | ||
535 | agedCPULoad = -1; | ||
536 | } | ||
537 | else | ||
538 | { | ||
539 | if (agedCPULoad == -1) | ||
540 | { | ||
541 | agedCPULoad = currentCPULoad; | ||
542 | } | ||
543 | else | ||
544 | { | ||
545 | /* for CPU, we don't do the 'fast increase' since CPU is much | ||
546 | more jitterish to begin with */ | ||
547 | agedCPULoad = (agedCPULoad * 31 + currentCPULoad) / 32; | ||
548 | } | ||
549 | } | ||
550 | if (currentIOLoad == -1) | ||
551 | { | ||
552 | agedIOLoad = -1; | ||
553 | } | ||
554 | else | ||
555 | { | ||
556 | if (agedIOLoad == -1) | ||
557 | { | ||
558 | agedIOLoad = currentIOLoad; | ||
559 | } | ||
560 | else | ||
561 | { | ||
562 | /* for IO, we don't do the 'fast increase' since IO is much | ||
563 | more jitterish to begin with */ | ||
564 | agedIOLoad = (agedIOLoad * 31 + currentIOLoad) / 32; | ||
565 | } | ||
566 | } | ||
567 | } | ||
568 | } | ||
569 | |||
570 | /** | ||
571 | * Get the load of the CPU relative to what is allowed. | ||
572 | * @return the CPU load as a percentage of allowed | ||
573 | * (100 is equivalent to full load) | ||
574 | */ | ||
575 | int | ||
576 | GNUNET_OS_load_cpu_get (struct GNUNET_CONFIGURATION_Handle *cfg) | ||
577 | { | ||
578 | unsigned long long maxCPULoad; | ||
579 | int ret; | ||
580 | |||
581 | updateAgedLoad (cfg); | ||
582 | ret = agedCPULoad; | ||
583 | if (ret == -1) | ||
584 | return -1; | ||
585 | if (GNUNET_OK != | ||
586 | GNUNET_CONFIGURATION_get_value_number (cfg, "LOAD", "MAXCPULOAD", | ||
587 | &maxCPULoad)) | ||
588 | return GNUNET_SYSERR; | ||
589 | return (100 * ret) / maxCPULoad; | ||
590 | } | ||
591 | |||
592 | |||
593 | /** | ||
594 | * Get the load of the CPU relative to what is allowed. | ||
595 | * @return the CPU load as a percentage of allowed | ||
596 | * (100 is equivalent to full load) | ||
597 | */ | ||
598 | int | ||
599 | GNUNET_OS_load_disk_get (struct GNUNET_CONFIGURATION_Handle *cfg) | ||
600 | { | ||
601 | unsigned long long maxIOLoad; | ||
602 | int ret; | ||
603 | |||
604 | updateAgedLoad (cfg); | ||
605 | ret = agedIOLoad; | ||
606 | if (ret == -1) | ||
607 | return -1; | ||
608 | if (-1 == | ||
609 | GNUNET_CONFIGURATION_get_value_number (cfg, "LOAD", "MAXIOLOAD", | ||
610 | &maxIOLoad)) | ||
611 | return GNUNET_SYSERR; | ||
612 | return (100 * ret) / maxIOLoad; | ||
613 | } | ||
614 | |||
615 | /** | ||
616 | * The following method is called in order to initialize the status calls | ||
617 | * routines. After that it is safe to call each of the status calls separately | ||
618 | * @return GNUNET_OK on success and GNUNET_SYSERR on error (or calls errexit). | ||
619 | */ | ||
620 | void __attribute__ ((constructor)) GNUNET_cpustats_ltdl_init () | ||
621 | { | ||
622 | #ifdef LINUX | ||
623 | proc_stat = fopen ("/proc/stat", "r"); | ||
624 | if (NULL == proc_stat) | ||
625 | GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, "fopen", "/proc/stat"); | ||
626 | #elif OSX | ||
627 | initMachCpuStats (); | ||
628 | #elif MINGW | ||
629 | InitWinEnv (NULL); | ||
630 | #endif | ||
631 | updateUsage (); /* initialize */ | ||
632 | } | ||
633 | |||
634 | /** | ||
635 | * Shutdown the status calls module. | ||
636 | */ | ||
637 | void __attribute__ ((destructor)) GNUNET_cpustats_ltdl_fini () | ||
638 | { | ||
639 | #ifdef LINUX | ||
640 | if (proc_stat != NULL) | ||
641 | { | ||
642 | fclose (proc_stat); | ||
643 | proc_stat = NULL; | ||
644 | } | ||
645 | #elif OSX | ||
646 | GNUNET_free_non_null (prev_cpu_load); | ||
647 | #elif MINGW | ||
648 | ShutdownWinEnv (); | ||
649 | #endif | ||
650 | } | ||
651 | |||
652 | |||
653 | /* end of os_load_cpu.c */ | ||