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TOMOYO Linux Cross Reference
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 
147         if (topology_depth > 2)
148                 printf("%4d|", cpu_top.core_info[cpu].pkg);
149         if (topology_depth > 1)
150                 printf("%4d|", cpu_top.core_info[cpu].core);
151         if (topology_depth > 0)
152                 printf("%4d|", cpu_top.core_info[cpu].cpu);
153 
154         for (mon = 0; mon < avail_monitors; mon++) {
155                 if (mon != 0)
156                         printf("||");
157 
158                 for (state = 0; state < monitors[mon]->hw_states_num; state++) {
159                         if (state != 0)
160                                 printf("|");
161 
162                         s = monitors[mon]->hw_states[state];
163 
164                         if (s.get_count_percent) {
165                                 ret = s.get_count_percent(s.id, &percent,
166                                                   cpu_top.core_info[cpu].cpu);
167                                 if (ret)
168                                         printf("******");
169                                 else if (percent >= 100.0)
170                                         printf("%6.1f", percent);
171                                 else
172                                         printf("%6.2f", percent);
173                         } else if (s.get_count) {
174                                 ret = s.get_count(s.id, &result,
175                                                   cpu_top.core_info[cpu].cpu);
176                                 if (ret)
177                                         printf("******");
178                                 else
179                                         printf("%6llu", result);
180                         } else {
181                                 printf(_("Monitor %s, Counter %s has no count "
182                                          "function. Implementation error\n"),
183                                        monitors[mon]->name, s.name);
184                                 exit(EXIT_FAILURE);
185                         }
186                 }
187         }
188         /*
189          * The monitor could still provide useful data, for example
190          * AMD HW counters partly sit in PCI config space.
191          * It's up to the monitor plug-in to check .is_online, this one
192          * is just for additional info.
193          */
194         if (!cpu_top.core_info[cpu].is_online) {
195                 printf(_(" *is offline\n"));
196                 return;
197         } else
198                 printf("\n");
199 }
200 
201 
202 /* param: string passed by -m param (The list of monitors to show)
203  *
204  * Monitors must have been registered already, matching monitors
205  * are picked out and available monitors array is overridden
206  * with matching ones
207  *
208  * Monitors get sorted in the same order the user passes them
209 */
210 
211 static void parse_monitor_param(char *param)
212 {
213         unsigned int num;
214         int mon, hits = 0;
215         char *tmp = param, *token;
216         struct cpuidle_monitor *tmp_mons[MONITORS_MAX];
217 
218 
219         for (mon = 0; mon < MONITORS_MAX; mon++, tmp = NULL) {
220                 token = strtok(tmp, ",");
221                 if (token == NULL)
222                         break;
223                 if (strlen(token) >= MONITOR_NAME_LEN) {
224                         printf(_("%s: max monitor name length"
225                                  " (%d) exceeded\n"), token, MONITOR_NAME_LEN);
226                         continue;
227                 }
228 
229                 for (num = 0; num < avail_monitors; num++) {
230                         if (!strcmp(monitors[num]->name, token)) {
231                                 dprint("Found requested monitor: %s\n", token);
232                                 tmp_mons[hits] = monitors[num];
233                                 hits++;
234                         }
235                 }
236         }
237         if (hits == 0) {
238                 printf(_("No matching monitor found in %s, "
239                          "try -l option\n"), param);
240                 exit(EXIT_FAILURE);
241         }
242         /* Override detected/registerd monitors array with requested one */
243         memcpy(monitors, tmp_mons,
244                 sizeof(struct cpuidle_monitor *) * MONITORS_MAX);
245         avail_monitors = hits;
246 }
247 
248 void list_monitors(void)
249 {
250         unsigned int mon;
251         int state;
252         cstate_t s;
253 
254         for (mon = 0; mon < avail_monitors; mon++) {
255                 printf(_("Monitor \"%s\" (%d states) - Might overflow after %u "
256                          "s\n"),
257                         monitors[mon]->name, monitors[mon]->hw_states_num,
258                         monitors[mon]->overflow_s);
259 
260                 for (state = 0; state < monitors[mon]->hw_states_num; state++) {
261                         s = monitors[mon]->hw_states[state];
262                         /*
263                          * ToDo show more state capabilities:
264                          * percent, time (granlarity)
265                          */
266                         printf("%s\t[%c] -> %s\n", s.name, range_abbr[s.range],
267                                gettext(s.desc));
268                 }
269         }
270 }
271 
272 int fork_it(char **argv)
273 {
274         int status;
275         unsigned int num;
276         unsigned long long timediff;
277         pid_t child_pid;
278         struct timespec start, end;
279 
280         child_pid = fork();
281         clock_gettime(CLOCK_REALTIME, &start);
282 
283         for (num = 0; num < avail_monitors; num++)
284                 monitors[num]->start();
285 
286         if (!child_pid) {
287                 /* child */
288                 execvp(argv[0], argv);
289         } else {
290                 /* parent */
291                 if (child_pid == -1) {
292                         perror("fork");
293                         exit(1);
294                 }
295 
296                 signal(SIGINT, SIG_IGN);
297                 signal(SIGQUIT, SIG_IGN);
298                 if (waitpid(child_pid, &status, 0) == -1) {
299                         perror("wait");
300                         exit(1);
301                 }
302         }
303         clock_gettime(CLOCK_REALTIME, &end);
304         for (num = 0; num < avail_monitors; num++)
305                 monitors[num]->stop();
306 
307         timediff = timespec_diff_us(start, end);
308         if (WIFEXITED(status))
309                 printf(_("%s took %.5f seconds and exited with status %d\n"),
310                         argv[0], timediff / (1000.0 * 1000),
311                         WEXITSTATUS(status));
312         return 0;
313 }
314 
315 int do_interval_measure(int i)
316 {
317         unsigned int num;
318         int cpu;
319 
320         if (wake_cpus)
321                 for (cpu = 0; cpu < cpu_count; cpu++)
322                         bind_cpu(cpu);
323 
324         for (num = 0; num < avail_monitors; num++) {
325                 dprint("HW C-state residency monitor: %s - States: %d\n",
326                        monitors[num]->name, monitors[num]->hw_states_num);
327                 monitors[num]->start();
328         }
329 
330         sleep(i);
331 
332         if (wake_cpus)
333                 for (cpu = 0; cpu < cpu_count; cpu++)
334                         bind_cpu(cpu);
335 
336         for (num = 0; num < avail_monitors; num++)
337                 monitors[num]->stop();
338 
339 
340         return 0;
341 }
342 
343 static void cmdline(int argc, char *argv[])
344 {
345         int opt;
346         progname = basename(argv[0]);
347 
348         while ((opt = getopt(argc, argv, "+lci:m:")) != -1) {
349                 switch (opt) {
350                 case 'l':
351                         if (mode)
352                                 print_wrong_arg_exit();
353                         mode = list;
354                         break;
355                 case 'i':
356                         /* only allow -i with -m or no option */
357                         if (mode && mode != show)
358                                 print_wrong_arg_exit();
359                         interval = atoi(optarg);
360                         break;
361                 case 'm':
362                         if (mode)
363                                 print_wrong_arg_exit();
364                         mode = show;
365                         show_monitors_param = optarg;
366                         break;
367                 case 'c':
368                         wake_cpus = 1;
369                         break;
370                 default:
371                         print_wrong_arg_exit();
372                 }
373         }
374         if (!mode)
375                 mode = show_all;
376 }
377 
378 int cmd_monitor(int argc, char **argv)
379 {
380         unsigned int num;
381         struct cpuidle_monitor *test_mon;
382         int cpu;
383 
384         cmdline(argc, argv);
385         cpu_count = get_cpu_topology(&cpu_top);
386         if (cpu_count < 0) {
387                 printf(_("Cannot read number of available processors\n"));
388                 return EXIT_FAILURE;
389         }
390 
391         /* Default is: monitor all CPUs */
392         if (bitmask_isallclear(cpus_chosen))
393                 bitmask_setall(cpus_chosen);
394 
395         dprint("System has up to %d CPU cores\n", cpu_count);
396 
397         for (num = 0; all_monitors[num]; num++) {
398                 dprint("Try to register: %s\n", all_monitors[num]->name);
399                 test_mon = all_monitors[num]->do_register();
400                 if (test_mon) {
401                         if (test_mon->needs_root && !run_as_root) {
402                                 fprintf(stderr, _("Available monitor %s needs "
403                                           "root access\n"), test_mon->name);
404                                 continue;
405                         }
406                         monitors[avail_monitors] = test_mon;
407                         dprint("%s registered\n", all_monitors[num]->name);
408                         avail_monitors++;
409                 }
410         }
411 
412         if (avail_monitors == 0) {
413                 printf(_("No HW Cstate monitors found\n"));
414                 return 1;
415         }
416 
417         if (mode == list) {
418                 list_monitors();
419                 exit(EXIT_SUCCESS);
420         }
421 
422         if (mode == show)
423                 parse_monitor_param(show_monitors_param);
424 
425         dprint("Packages: %d - Cores: %d - CPUs: %d\n",
426                cpu_top.pkgs, cpu_top.cores, cpu_count);
427 
428         /*
429          * if any params left, it must be a command to fork
430          */
431         if (argc - optind)
432                 fork_it(argv + optind);
433         else
434                 do_interval_measure(interval);
435 
436         /* ToDo: Topology parsing needs fixing first to do
437            this more generically */
438         if (cpu_top.pkgs > 1)
439                 print_header(3);
440         else
441                 print_header(1);
442 
443         for (cpu = 0; cpu < cpu_count; cpu++) {
444                 if (cpu_top.pkgs > 1)
445                         print_results(3, cpu);
446                 else
447                         print_results(1, cpu);
448         }
449 
450         for (num = 0; num < avail_monitors; num++)
451                 monitors[num]->unregister();
452 
453         cpu_topology_release(cpu_top);
454         return 0;
455 }
456 

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