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Linux/tools/power/cpupower/utils/idle_monitor/cpupower-monitor.c

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  1 /*
  2  *  (C) 2010,2011       Thomas Renninger <trenn@suse.de>, Novell Inc.
  3  *
  4  *  Licensed under the terms of the GNU GPL License version 2.
  5  *
  6  *  Output format inspired by Len Brown's <lenb@kernel.org> turbostat tool.
  7  *
  8  */
  9 
 10 
 11 #include <stdio.h>
 12 #include <unistd.h>
 13 #include <stdlib.h>
 14 #include <string.h>
 15 #include <time.h>
 16 #include <signal.h>
 17 #include <sys/types.h>
 18 #include <sys/wait.h>
 19 #include <libgen.h>
 20 
 21 #include "idle_monitor/cpupower-monitor.h"
 22 #include "idle_monitor/idle_monitors.h"
 23 #include "helpers/helpers.h"
 24 
 25 /* Define pointers to all monitors.  */
 26 #define DEF(x) & x ## _monitor ,
 27 struct cpuidle_monitor *all_monitors[] = {
 28 #include "idle_monitors.def"
 29 
 30 };
 31 
 32 static struct cpuidle_monitor *monitors[MONITORS_MAX];
 33 static unsigned int avail_monitors;
 34 
 35 static char *progname;
 36 
 37 enum operation_mode_e { list = 1, show, show_all };
 38 static int mode;
 39 static int interval = 1;
 40 static char *show_monitors_param;
 41 static struct cpupower_topology cpu_top;
 42 static unsigned int wake_cpus;
 43 
 44 /* ToDo: Document this in the manpage */
 45 static char range_abbr[RANGE_MAX] = { 'T', 'C', 'P', 'M', };
 46 
 47 static void print_wrong_arg_exit(void)
 48 {
 49         printf(_("invalid or unknown argument\n"));
 50         exit(EXIT_FAILURE);
 51 }
 52 
 53 long long timespec_diff_us(struct timespec start, struct timespec end)
 54 {
 55         struct timespec temp;
 56         if ((end.tv_nsec - start.tv_nsec) < 0) {
 57                 temp.tv_sec = end.tv_sec - start.tv_sec - 1;
 58                 temp.tv_nsec = 1000000000 + end.tv_nsec - start.tv_nsec;
 59         } else {
 60                 temp.tv_sec = end.tv_sec - start.tv_sec;
 61                 temp.tv_nsec = end.tv_nsec - start.tv_nsec;
 62         }
 63         return (temp.tv_sec * 1000000) + (temp.tv_nsec / 1000);
 64 }
 65 
 66 void print_n_spaces(int n)
 67 {
 68         int x;
 69         for (x = 0; x < n; x++)
 70                 printf(" ");
 71 }
 72 
 73 /* size of s must be at least n + 1 */
 74 int fill_string_with_spaces(char *s, int n)
 75 {
 76         int len = strlen(s);
 77         if (len > n)
 78                 return -1;
 79         for (; len < n; len++)
 80                 s[len] = ' ';
 81         s[len] = '\0';
 82         return 0;
 83 }
 84 
 85 void print_header(int topology_depth)
 86 {
 87         int unsigned mon;
 88         int state, need_len;
 89         cstate_t s;
 90         char buf[128] = "";
 91         int percent_width = 4;
 92 
 93         fill_string_with_spaces(buf, topology_depth * 5 - 1);
 94         printf("%s|", buf);
 95 
 96         for (mon = 0; mon < avail_monitors; mon++) {
 97                 need_len = monitors[mon]->hw_states_num * (percent_width + 3)
 98                         - 1;
 99                 if (mon != 0) {
100                         printf("|| ");
101                         need_len--;
102                 }
103                 sprintf(buf, "%s", monitors[mon]->name);
104                 fill_string_with_spaces(buf, need_len);
105                 printf("%s", buf);
106         }
107         printf("\n");
108 
109         if (topology_depth > 2)
110                 printf("PKG |");
111         if (topology_depth > 1)
112                 printf("CORE|");
113         if (topology_depth > 0)
114                 printf("CPU |");
115 
116         for (mon = 0; mon < avail_monitors; mon++) {
117                 if (mon != 0)
118                         printf("|| ");
119                 else
120                         printf(" ");
121                 for (state = 0; state < monitors[mon]->hw_states_num; state++) {
122                         if (state != 0)
123                                 printf(" | ");
124                         s = monitors[mon]->hw_states[state];
125                         sprintf(buf, "%s", s.name);
126                         fill_string_with_spaces(buf, percent_width);
127                         printf("%s", buf);
128                 }
129                 printf(" ");
130         }
131         printf("\n");
132 }
133 
134 
135 void print_results(int topology_depth, int cpu)
136 {
137         unsigned int mon;
138         int state, ret;
139         double percent;
140         unsigned long long result;
141         cstate_t s;
142 
143         /* Be careful CPUs may got resorted for pkg value do not just use cpu */
144         if (!bitmask_isbitset(cpus_chosen, cpu_top.core_info[cpu].cpu))
145                 return;
146         if (!cpu_top.core_info[cpu].is_online &&
147             cpu_top.core_info[cpu].pkg == -1)
148                 return;
149 
150         if (topology_depth > 2)
151                 printf("%4d|", cpu_top.core_info[cpu].pkg);
152         if (topology_depth > 1)
153                 printf("%4d|", cpu_top.core_info[cpu].core);
154         if (topology_depth > 0)
155                 printf("%4d|", cpu_top.core_info[cpu].cpu);
156 
157         for (mon = 0; mon < avail_monitors; mon++) {
158                 if (mon != 0)
159                         printf("||");
160 
161                 for (state = 0; state < monitors[mon]->hw_states_num; state++) {
162                         if (state != 0)
163                                 printf("|");
164 
165                         s = monitors[mon]->hw_states[state];
166 
167                         if (s.get_count_percent) {
168                                 ret = s.get_count_percent(s.id, &percent,
169                                                   cpu_top.core_info[cpu].cpu);
170                                 if (ret)
171                                         printf("******");
172                                 else if (percent >= 100.0)
173                                         printf("%6.1f", percent);
174                                 else
175                                         printf("%6.2f", percent);
176                         } else if (s.get_count) {
177                                 ret = s.get_count(s.id, &result,
178                                                   cpu_top.core_info[cpu].cpu);
179                                 if (ret)
180                                         printf("******");
181                                 else
182                                         printf("%6llu", result);
183                         } else {
184                                 printf(_("Monitor %s, Counter %s has no count "
185                                          "function. Implementation error\n"),
186                                        monitors[mon]->name, s.name);
187                                 exit(EXIT_FAILURE);
188                         }
189                 }
190         }
191         /*
192          * The monitor could still provide useful data, for example
193          * AMD HW counters partly sit in PCI config space.
194          * It's up to the monitor plug-in to check .is_online, this one
195          * is just for additional info.
196          */
197         if (!cpu_top.core_info[cpu].is_online &&
198             cpu_top.core_info[cpu].pkg != -1) {
199                 printf(_(" *is offline\n"));
200                 return;
201         } else
202                 printf("\n");
203 }
204 
205 
206 /* param: string passed by -m param (The list of monitors to show)
207  *
208  * Monitors must have been registered already, matching monitors
209  * are picked out and available monitors array is overridden
210  * with matching ones
211  *
212  * Monitors get sorted in the same order the user passes them
213 */
214 
215 static void parse_monitor_param(char *param)
216 {
217         unsigned int num;
218         int mon, hits = 0;
219         char *tmp = param, *token;
220         struct cpuidle_monitor *tmp_mons[MONITORS_MAX];
221 
222 
223         for (mon = 0; mon < MONITORS_MAX; mon++, tmp = NULL) {
224                 token = strtok(tmp, ",");
225                 if (token == NULL)
226                         break;
227                 if (strlen(token) >= MONITOR_NAME_LEN) {
228                         printf(_("%s: max monitor name length"
229                                  " (%d) exceeded\n"), token, MONITOR_NAME_LEN);
230                         continue;
231                 }
232 
233                 for (num = 0; num < avail_monitors; num++) {
234                         if (!strcmp(monitors[num]->name, token)) {
235                                 dprint("Found requested monitor: %s\n", token);
236                                 tmp_mons[hits] = monitors[num];
237                                 hits++;
238                         }
239                 }
240         }
241         if (hits == 0) {
242                 printf(_("No matching monitor found in %s, "
243                          "try -l option\n"), param);
244                 exit(EXIT_FAILURE);
245         }
246         /* Override detected/registerd monitors array with requested one */
247         memcpy(monitors, tmp_mons,
248                 sizeof(struct cpuidle_monitor *) * MONITORS_MAX);
249         avail_monitors = hits;
250 }
251 
252 void list_monitors(void)
253 {
254         unsigned int mon;
255         int state;
256         cstate_t s;
257 
258         for (mon = 0; mon < avail_monitors; mon++) {
259                 printf(_("Monitor \"%s\" (%d states) - Might overflow after %u "
260                          "s\n"),
261                         monitors[mon]->name, monitors[mon]->hw_states_num,
262                         monitors[mon]->overflow_s);
263 
264                 for (state = 0; state < monitors[mon]->hw_states_num; state++) {
265                         s = monitors[mon]->hw_states[state];
266                         /*
267                          * ToDo show more state capabilities:
268                          * percent, time (granlarity)
269                          */
270                         printf("%s\t[%c] -> %s\n", s.name, range_abbr[s.range],
271                                gettext(s.desc));
272                 }
273         }
274 }
275 
276 int fork_it(char **argv)
277 {
278         int status;
279         unsigned int num;
280         unsigned long long timediff;
281         pid_t child_pid;
282         struct timespec start, end;
283 
284         child_pid = fork();
285         clock_gettime(CLOCK_REALTIME, &start);
286 
287         for (num = 0; num < avail_monitors; num++)
288                 monitors[num]->start();
289 
290         if (!child_pid) {
291                 /* child */
292                 execvp(argv[0], argv);
293         } else {
294                 /* parent */
295                 if (child_pid == -1) {
296                         perror("fork");
297                         exit(1);
298                 }
299 
300                 signal(SIGINT, SIG_IGN);
301                 signal(SIGQUIT, SIG_IGN);
302                 if (waitpid(child_pid, &status, 0) == -1) {
303                         perror("wait");
304                         exit(1);
305                 }
306         }
307         clock_gettime(CLOCK_REALTIME, &end);
308         for (num = 0; num < avail_monitors; num++)
309                 monitors[num]->stop();
310 
311         timediff = timespec_diff_us(start, end);
312         if (WIFEXITED(status))
313                 printf(_("%s took %.5f seconds and exited with status %d\n"),
314                         argv[0], timediff / (1000.0 * 1000),
315                         WEXITSTATUS(status));
316         return 0;
317 }
318 
319 int do_interval_measure(int i)
320 {
321         unsigned int num;
322         int cpu;
323 
324         if (wake_cpus)
325                 for (cpu = 0; cpu < cpu_count; cpu++)
326                         bind_cpu(cpu);
327 
328         for (num = 0; num < avail_monitors; num++) {
329                 dprint("HW C-state residency monitor: %s - States: %d\n",
330                        monitors[num]->name, monitors[num]->hw_states_num);
331                 monitors[num]->start();
332         }
333 
334         sleep(i);
335 
336         if (wake_cpus)
337                 for (cpu = 0; cpu < cpu_count; cpu++)
338                         bind_cpu(cpu);
339 
340         for (num = 0; num < avail_monitors; num++)
341                 monitors[num]->stop();
342 
343 
344         return 0;
345 }
346 
347 static void cmdline(int argc, char *argv[])
348 {
349         int opt;
350         progname = basename(argv[0]);
351 
352         while ((opt = getopt(argc, argv, "+lci:m:")) != -1) {
353                 switch (opt) {
354                 case 'l':
355                         if (mode)
356                                 print_wrong_arg_exit();
357                         mode = list;
358                         break;
359                 case 'i':
360                         /* only allow -i with -m or no option */
361                         if (mode && mode != show)
362                                 print_wrong_arg_exit();
363                         interval = atoi(optarg);
364                         break;
365                 case 'm':
366                         if (mode)
367                                 print_wrong_arg_exit();
368                         mode = show;
369                         show_monitors_param = optarg;
370                         break;
371                 case 'c':
372                         wake_cpus = 1;
373                         break;
374                 default:
375                         print_wrong_arg_exit();
376                 }
377         }
378         if (!mode)
379                 mode = show_all;
380 }
381 
382 int cmd_monitor(int argc, char **argv)
383 {
384         unsigned int num;
385         struct cpuidle_monitor *test_mon;
386         int cpu;
387 
388         cmdline(argc, argv);
389         cpu_count = get_cpu_topology(&cpu_top);
390         if (cpu_count < 0) {
391                 printf(_("Cannot read number of available processors\n"));
392                 return EXIT_FAILURE;
393         }
394 
395         if (!cpu_top.core_info[0].is_online)
396                 printf("WARNING: at least one cpu is offline\n");
397 
398         /* Default is: monitor all CPUs */
399         if (bitmask_isallclear(cpus_chosen))
400                 bitmask_setall(cpus_chosen);
401 
402         dprint("System has up to %d CPU cores\n", cpu_count);
403 
404         for (num = 0; all_monitors[num]; num++) {
405                 dprint("Try to register: %s\n", all_monitors[num]->name);
406                 test_mon = all_monitors[num]->do_register();
407                 if (test_mon) {
408                         if (test_mon->needs_root && !run_as_root) {
409                                 fprintf(stderr, _("Available monitor %s needs "
410                                           "root access\n"), test_mon->name);
411                                 continue;
412                         }
413                         monitors[avail_monitors] = test_mon;
414                         dprint("%s registered\n", all_monitors[num]->name);
415                         avail_monitors++;
416                 }
417         }
418 
419         if (avail_monitors == 0) {
420                 printf(_("No HW Cstate monitors found\n"));
421                 return 1;
422         }
423 
424         if (mode == list) {
425                 list_monitors();
426                 exit(EXIT_SUCCESS);
427         }
428 
429         if (mode == show)
430                 parse_monitor_param(show_monitors_param);
431 
432         dprint("Packages: %d - Cores: %d - CPUs: %d\n",
433                cpu_top.pkgs, cpu_top.cores, cpu_count);
434 
435         /*
436          * if any params left, it must be a command to fork
437          */
438         if (argc - optind)
439                 fork_it(argv + optind);
440         else
441                 do_interval_measure(interval);
442 
443         /* ToDo: Topology parsing needs fixing first to do
444            this more generically */
445         if (cpu_top.pkgs > 1)
446                 print_header(3);
447         else
448                 print_header(1);
449 
450         for (cpu = 0; cpu < cpu_count; cpu++) {
451                 if (cpu_top.pkgs > 1)
452                         print_results(3, cpu);
453                 else
454                         print_results(1, cpu);
455         }
456 
457         for (num = 0; num < avail_monitors; num++)
458                 monitors[num]->unregister();
459 
460         cpu_topology_release(cpu_top);
461         return 0;
462 }
463 

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