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TOMOYO Linux Cross Reference
Linux/tools/power/cpupower/utils/idle_monitor/cpupower-monitor.c

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  1 // SPDX-License-Identifier: GPL-2.0-only
  2 /*
  3  *  (C) 2010,2011       Thomas Renninger <trenn@suse.de>, Novell Inc.
  4  *
  5  *  Output format inspired by Len Brown's <lenb@kernel.org> turbostat tool.
  6  */
  7 
  8 
  9 #include <stdio.h>
 10 #include <unistd.h>
 11 #include <stdlib.h>
 12 #include <string.h>
 13 #include <time.h>
 14 #include <signal.h>
 15 #include <sys/types.h>
 16 #include <sys/wait.h>
 17 #include <libgen.h>
 18 
 19 #include "idle_monitor/cpupower-monitor.h"
 20 #include "idle_monitor/idle_monitors.h"
 21 #include "helpers/helpers.h"
 22 
 23 /* Define pointers to all monitors.  */
 24 #define DEF(x) & x ## _monitor ,
 25 struct cpuidle_monitor *all_monitors[] = {
 26 #include "idle_monitors.def"
 27 
 28 };
 29 
 30 int cpu_count;
 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 /*s is filled with left and right spaces
 74  *to make its length atleast n+1
 75  */
 76 int fill_string_with_spaces(char *s, int n)
 77 {
 78         char *temp;
 79         int len = strlen(s);
 80 
 81         if (len >= n)
 82                 return -1;
 83 
 84         temp = malloc(sizeof(char) * (n+1));
 85         for (; len < n; len++)
 86                 s[len] = ' ';
 87         s[len] = '\0';
 88         snprintf(temp, n+1, " %s", s);
 89         strcpy(s, temp);
 90         free(temp);
 91         return 0;
 92 }
 93 
 94 #define MAX_COL_WIDTH 6
 95 void print_header(int topology_depth)
 96 {
 97         int unsigned mon;
 98         int state, need_len;
 99         cstate_t s;
100         char buf[128] = "";
101 
102         fill_string_with_spaces(buf, topology_depth * 5 - 1);
103         printf("%s|", buf);
104 
105         for (mon = 0; mon < avail_monitors; mon++) {
106                 need_len = monitors[mon]->hw_states_num * (MAX_COL_WIDTH + 1)
107                         - 1;
108                 if (mon != 0)
109                         printf("||");
110                 sprintf(buf, "%s", monitors[mon]->name);
111                 fill_string_with_spaces(buf, need_len);
112                 printf("%s", buf);
113         }
114         printf("\n");
115 
116         if (topology_depth > 2)
117                 printf(" PKG|");
118         if (topology_depth > 1)
119                 printf("CORE|");
120         if (topology_depth > 0)
121                 printf(" CPU|");
122 
123         for (mon = 0; mon < avail_monitors; mon++) {
124                 if (mon != 0)
125                         printf("||");
126                 for (state = 0; state < monitors[mon]->hw_states_num; state++) {
127                         if (state != 0)
128                                 printf("|");
129                         s = monitors[mon]->hw_states[state];
130                         sprintf(buf, "%s", s.name);
131                         fill_string_with_spaces(buf, MAX_COL_WIDTH);
132                         printf("%s", buf);
133                 }
134                 printf(" ");
135         }
136         printf("\n");
137 }
138 
139 
140 void print_results(int topology_depth, int cpu)
141 {
142         unsigned int mon;
143         int state, ret;
144         double percent;
145         unsigned long long result;
146         cstate_t s;
147 
148         /* Be careful CPUs may got resorted for pkg value do not just use cpu */
149         if (!bitmask_isbitset(cpus_chosen, cpu_top.core_info[cpu].cpu))
150                 return;
151         if (!cpu_top.core_info[cpu].is_online &&
152             cpu_top.core_info[cpu].pkg == -1)
153                 return;
154 
155         if (topology_depth > 2)
156                 printf("%4d|", cpu_top.core_info[cpu].pkg);
157         if (topology_depth > 1)
158                 printf("%4d|", cpu_top.core_info[cpu].core);
159         if (topology_depth > 0)
160                 printf("%4d|", cpu_top.core_info[cpu].cpu);
161 
162         for (mon = 0; mon < avail_monitors; mon++) {
163                 if (mon != 0)
164                         printf("||");
165 
166                 for (state = 0; state < monitors[mon]->hw_states_num; state++) {
167                         if (state != 0)
168                                 printf("|");
169 
170                         s = monitors[mon]->hw_states[state];
171 
172                         if (s.get_count_percent) {
173                                 ret = s.get_count_percent(s.id, &percent,
174                                                   cpu_top.core_info[cpu].cpu);
175                                 if (ret)
176                                         printf("******");
177                                 else if (percent >= 100.0)
178                                         printf("%6.1f", percent);
179                                 else
180                                         printf("%6.2f", percent);
181                         } else if (s.get_count) {
182                                 ret = s.get_count(s.id, &result,
183                                                   cpu_top.core_info[cpu].cpu);
184                                 if (ret)
185                                         printf("******");
186                                 else
187                                         printf("%6llu", result);
188                         } else {
189                                 printf(_("Monitor %s, Counter %s has no count "
190                                          "function. Implementation error\n"),
191                                        monitors[mon]->name, s.name);
192                                 exit(EXIT_FAILURE);
193                         }
194                 }
195         }
196         /*
197          * The monitor could still provide useful data, for example
198          * AMD HW counters partly sit in PCI config space.
199          * It's up to the monitor plug-in to check .is_online, this one
200          * is just for additional info.
201          */
202         if (!cpu_top.core_info[cpu].is_online &&
203             cpu_top.core_info[cpu].pkg != -1) {
204                 printf(_(" *is offline\n"));
205                 return;
206         } else
207                 printf("\n");
208 }
209 
210 
211 /* param: string passed by -m param (The list of monitors to show)
212  *
213  * Monitors must have been registered already, matching monitors
214  * are picked out and available monitors array is overridden
215  * with matching ones
216  *
217  * Monitors get sorted in the same order the user passes them
218 */
219 
220 static void parse_monitor_param(char *param)
221 {
222         unsigned int num;
223         int mon, hits = 0;
224         char *tmp = param, *token;
225         struct cpuidle_monitor *tmp_mons[MONITORS_MAX];
226 
227 
228         for (mon = 0; mon < MONITORS_MAX; mon++, tmp = NULL) {
229                 token = strtok(tmp, ",");
230                 if (token == NULL)
231                         break;
232                 if (strlen(token) >= MONITOR_NAME_LEN) {
233                         printf(_("%s: max monitor name length"
234                                  " (%d) exceeded\n"), token, MONITOR_NAME_LEN);
235                         continue;
236                 }
237 
238                 for (num = 0; num < avail_monitors; num++) {
239                         if (!strcmp(monitors[num]->name, token)) {
240                                 dprint("Found requested monitor: %s\n", token);
241                                 tmp_mons[hits] = monitors[num];
242                                 hits++;
243                         }
244                 }
245         }
246         if (hits == 0) {
247                 printf(_("No matching monitor found in %s, "
248                          "try -l option\n"), param);
249                 exit(EXIT_FAILURE);
250         }
251         /* Override detected/registerd monitors array with requested one */
252         memcpy(monitors, tmp_mons,
253                 sizeof(struct cpuidle_monitor *) * MONITORS_MAX);
254         avail_monitors = hits;
255 }
256 
257 void list_monitors(void)
258 {
259         unsigned int mon;
260         int state;
261         cstate_t s;
262 
263         for (mon = 0; mon < avail_monitors; mon++) {
264                 printf(_("Monitor \"%s\" (%d states) - Might overflow after %u "
265                          "s\n"),
266                         monitors[mon]->name, monitors[mon]->hw_states_num,
267                         monitors[mon]->overflow_s);
268 
269                 for (state = 0; state < monitors[mon]->hw_states_num; state++) {
270                         s = monitors[mon]->hw_states[state];
271                         /*
272                          * ToDo show more state capabilities:
273                          * percent, time (granlarity)
274                          */
275                         printf("%s\t[%c] -> %s\n", s.name, range_abbr[s.range],
276                                gettext(s.desc));
277                 }
278         }
279 }
280 
281 int fork_it(char **argv)
282 {
283         int status;
284         unsigned int num;
285         unsigned long long timediff;
286         pid_t child_pid;
287         struct timespec start, end;
288 
289         child_pid = fork();
290         clock_gettime(CLOCK_REALTIME, &start);
291 
292         for (num = 0; num < avail_monitors; num++)
293                 monitors[num]->start();
294 
295         if (!child_pid) {
296                 /* child */
297                 execvp(argv[0], argv);
298         } else {
299                 /* parent */
300                 if (child_pid == -1) {
301                         perror("fork");
302                         exit(1);
303                 }
304 
305                 signal(SIGINT, SIG_IGN);
306                 signal(SIGQUIT, SIG_IGN);
307                 if (waitpid(child_pid, &status, 0) == -1) {
308                         perror("wait");
309                         exit(1);
310                 }
311         }
312         clock_gettime(CLOCK_REALTIME, &end);
313         for (num = 0; num < avail_monitors; num++)
314                 monitors[num]->stop();
315 
316         timediff = timespec_diff_us(start, end);
317         if (WIFEXITED(status))
318                 printf(_("%s took %.5f seconds and exited with status %d\n"),
319                         argv[0], timediff / (1000.0 * 1000),
320                         WEXITSTATUS(status));
321         return 0;
322 }
323 
324 int do_interval_measure(int i)
325 {
326         unsigned int num;
327         int cpu;
328 
329         if (wake_cpus)
330                 for (cpu = 0; cpu < cpu_count; cpu++)
331                         bind_cpu(cpu);
332 
333         for (num = 0; num < avail_monitors; num++) {
334                 dprint("HW C-state residency monitor: %s - States: %d\n",
335                        monitors[num]->name, monitors[num]->hw_states_num);
336                 monitors[num]->start();
337         }
338 
339         sleep(i);
340 
341         if (wake_cpus)
342                 for (cpu = 0; cpu < cpu_count; cpu++)
343                         bind_cpu(cpu);
344 
345         for (num = 0; num < avail_monitors; num++)
346                 monitors[num]->stop();
347 
348 
349         return 0;
350 }
351 
352 static void cmdline(int argc, char *argv[])
353 {
354         int opt;
355         progname = basename(argv[0]);
356 
357         while ((opt = getopt(argc, argv, "+lci:m:")) != -1) {
358                 switch (opt) {
359                 case 'l':
360                         if (mode)
361                                 print_wrong_arg_exit();
362                         mode = list;
363                         break;
364                 case 'i':
365                         /* only allow -i with -m or no option */
366                         if (mode && mode != show)
367                                 print_wrong_arg_exit();
368                         interval = atoi(optarg);
369                         break;
370                 case 'm':
371                         if (mode)
372                                 print_wrong_arg_exit();
373                         mode = show;
374                         show_monitors_param = optarg;
375                         break;
376                 case 'c':
377                         wake_cpus = 1;
378                         break;
379                 default:
380                         print_wrong_arg_exit();
381                 }
382         }
383         if (!mode)
384                 mode = show_all;
385 }
386 
387 int cmd_monitor(int argc, char **argv)
388 {
389         unsigned int num;
390         struct cpuidle_monitor *test_mon;
391         int cpu;
392 
393         cmdline(argc, argv);
394         cpu_count = get_cpu_topology(&cpu_top);
395         if (cpu_count < 0) {
396                 printf(_("Cannot read number of available processors\n"));
397                 return EXIT_FAILURE;
398         }
399 
400         if (!cpu_top.core_info[0].is_online)
401                 printf("WARNING: at least one cpu is offline\n");
402 
403         /* Default is: monitor all CPUs */
404         if (bitmask_isallclear(cpus_chosen))
405                 bitmask_setall(cpus_chosen);
406 
407         dprint("System has up to %d CPU cores\n", cpu_count);
408 
409         for (num = 0; all_monitors[num]; num++) {
410                 dprint("Try to register: %s\n", all_monitors[num]->name);
411                 test_mon = all_monitors[num]->do_register();
412                 if (test_mon) {
413                         if (test_mon->flags.needs_root && !run_as_root) {
414                                 fprintf(stderr, _("Available monitor %s needs "
415                                           "root access\n"), test_mon->name);
416                                 continue;
417                         }
418                         monitors[avail_monitors] = test_mon;
419                         dprint("%s registered\n", all_monitors[num]->name);
420                         avail_monitors++;
421                 }
422         }
423 
424         if (avail_monitors == 0) {
425                 printf(_("No HW Cstate monitors found\n"));
426                 return 1;
427         }
428 
429         if (mode == list) {
430                 list_monitors();
431                 exit(EXIT_SUCCESS);
432         }
433 
434         if (mode == show)
435                 parse_monitor_param(show_monitors_param);
436 
437         dprint("Packages: %d - Cores: %d - CPUs: %d\n",
438                cpu_top.pkgs, cpu_top.cores, cpu_count);
439 
440         /*
441          * if any params left, it must be a command to fork
442          */
443         if (argc - optind)
444                 fork_it(argv + optind);
445         else
446                 do_interval_measure(interval);
447 
448         /* ToDo: Topology parsing needs fixing first to do
449            this more generically */
450         if (cpu_top.pkgs > 1)
451                 print_header(3);
452         else
453                 print_header(1);
454 
455         for (cpu = 0; cpu < cpu_count; cpu++) {
456                 if (cpu_top.pkgs > 1)
457                         print_results(3, cpu);
458                 else
459                         print_results(1, cpu);
460         }
461 
462         for (num = 0; num < avail_monitors; num++)
463                 monitors[num]->unregister();
464 
465         cpu_topology_release(cpu_top);
466         return 0;
467 }
468 

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