1 /*- 2 * Copyright (c) 2004 Colin Percival 3 * Copyright (c) 2005 Nate Lawson 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted providing that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 19 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 23 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 24 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25 * POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 #include <sys/param.h> 32 #include <sys/ioctl.h> 33 #include <sys/sysctl.h> 34 #include <sys/resource.h> 35 #include <sys/socket.h> 36 #include <sys/time.h> 37 #include <sys/un.h> 38 39 #include <err.h> 40 #include <errno.h> 41 #include <fcntl.h> 42 #include <libutil.h> 43 #include <signal.h> 44 #include <stdio.h> 45 #include <stdlib.h> 46 #include <string.h> 47 #include <unistd.h> 48 49 #ifdef __i386__ 50 #define USE_APM 51 #endif 52 53 #ifdef USE_APM 54 #include <machine/apm_bios.h> 55 #endif 56 57 #define DEFAULT_ACTIVE_PERCENT 75 58 #define DEFAULT_IDLE_PERCENT 50 59 #define DEFAULT_POLL_INTERVAL 250 /* Poll interval in milliseconds */ 60 61 typedef enum { 62 MODE_MIN, 63 MODE_ADAPTIVE, 64 MODE_HIADAPTIVE, 65 MODE_MAX, 66 } modes_t; 67 68 typedef enum { 69 SRC_AC, 70 SRC_BATTERY, 71 SRC_UNKNOWN, 72 } power_src_t; 73 74 const char *modes[] = { 75 "AC", 76 "battery", 77 "unknown" 78 }; 79 80 #define ACPIAC "hw.acpi.acline" 81 #define PMUAC "dev.pmu.0.acline" 82 #define APMDEV "/dev/apm" 83 #define DEVDPIPE "/var/run/devd.pipe" 84 #define DEVCTL_MAXBUF 1024 85 86 static int read_usage_times(int *load); 87 static int read_freqs(int *numfreqs, int **freqs, int **power, 88 int minfreq, int maxfreq); 89 static int set_freq(int freq); 90 static void acline_init(void); 91 static void acline_read(void); 92 static int devd_init(void); 93 static void devd_close(void); 94 static void handle_sigs(int sig); 95 static void parse_mode(char *arg, int *mode, int ch); 96 static void usage(void); 97 98 /* Sysctl data structures. */ 99 static int cp_times_mib[2]; 100 static int freq_mib[4]; 101 static int levels_mib[4]; 102 static int acline_mib[4]; 103 static size_t acline_mib_len; 104 105 /* Configuration */ 106 static int cpu_running_mark; 107 static int cpu_idle_mark; 108 static int poll_ival; 109 static int vflag; 110 111 static volatile sig_atomic_t exit_requested; 112 static power_src_t acline_status; 113 static enum { 114 ac_none, 115 ac_sysctl, 116 ac_acpi_devd, 117 #ifdef USE_APM 118 ac_apm, 119 #endif 120 } acline_mode; 121 #ifdef USE_APM 122 static int apm_fd = -1; 123 #endif 124 static int devd_pipe = -1; 125 126 #define DEVD_RETRY_INTERVAL 60 /* seconds */ 127 static struct timeval tried_devd; 128 129 static int 130 read_usage_times(int *load) 131 { 132 static long *cp_times = NULL, *cp_times_old = NULL; 133 static int ncpus = 0; 134 size_t cp_times_len; 135 int error, cpu, i, total; 136 137 if (cp_times == NULL) { 138 cp_times_len = 0; 139 error = sysctl(cp_times_mib, 2, NULL, &cp_times_len, NULL, 0); 140 if (error) 141 return (error); 142 if ((cp_times = malloc(cp_times_len)) == NULL) 143 return (errno); 144 if ((cp_times_old = malloc(cp_times_len)) == NULL) { 145 free(cp_times); 146 cp_times = NULL; 147 return (errno); 148 } 149 ncpus = cp_times_len / (sizeof(long) * CPUSTATES); 150 } 151 152 cp_times_len = sizeof(long) * CPUSTATES * ncpus; 153 error = sysctl(cp_times_mib, 2, cp_times, &cp_times_len, NULL, 0); 154 if (error) 155 return (error); 156 157 if (load) { 158 *load = 0; 159 for (cpu = 0; cpu < ncpus; cpu++) { 160 total = 0; 161 for (i = 0; i < CPUSTATES; i++) { 162 total += cp_times[cpu * CPUSTATES + i] - 163 cp_times_old[cpu * CPUSTATES + i]; 164 } 165 if (total == 0) 166 continue; 167 *load += 100 - (cp_times[cpu * CPUSTATES + CP_IDLE] - 168 cp_times_old[cpu * CPUSTATES + CP_IDLE]) * 100 / total; 169 } 170 } 171 172 memcpy(cp_times_old, cp_times, cp_times_len); 173 174 return (0); 175 } 176 177 static int 178 read_freqs(int *numfreqs, int **freqs, int **power, int minfreq, int maxfreq) 179 { 180 char *freqstr, *p, *q; 181 int i, j; 182 size_t len = 0; 183 184 if (sysctl(levels_mib, 4, NULL, &len, NULL, 0)) 185 return (-1); 186 if ((freqstr = malloc(len)) == NULL) 187 return (-1); 188 if (sysctl(levels_mib, 4, freqstr, &len, NULL, 0)) 189 return (-1); 190 191 *numfreqs = 1; 192 for (p = freqstr; *p != '\0'; p++) 193 if (*p == ' ') 194 (*numfreqs)++; 195 196 if ((*freqs = malloc(*numfreqs * sizeof(int))) == NULL) { 197 free(freqstr); 198 return (-1); 199 } 200 if ((*power = malloc(*numfreqs * sizeof(int))) == NULL) { 201 free(freqstr); 202 free(*freqs); 203 return (-1); 204 } 205 for (i = 0, j = 0, p = freqstr; i < *numfreqs; i++) { 206 q = strchr(p, ' '); 207 if (q != NULL) 208 *q = '\0'; 209 if (sscanf(p, "%d/%d", &(*freqs)[j], &(*power)[i]) != 2) { 210 free(freqstr); 211 free(*freqs); 212 free(*power); 213 return (-1); 214 } 215 if (((*freqs)[j] >= minfreq || minfreq == -1) && 216 ((*freqs)[j] <= maxfreq || maxfreq == -1)) 217 j++; 218 p = q + 1; 219 } 220 221 *numfreqs = j; 222 if ((*freqs = realloc(*freqs, *numfreqs * sizeof(int))) == NULL) { 223 free(freqstr); 224 free(*freqs); 225 free(*power); 226 return (-1); 227 } 228 229 free(freqstr); 230 return (0); 231 } 232 233 static int 234 get_freq(void) 235 { 236 size_t len; 237 int curfreq; 238 239 len = sizeof(curfreq); 240 if (sysctl(freq_mib, 4, &curfreq, &len, NULL, 0) != 0) { 241 if (vflag) 242 warn("error reading current CPU frequency"); 243 curfreq = 0; 244 } 245 return (curfreq); 246 } 247 248 static int 249 set_freq(int freq) 250 { 251 252 if (sysctl(freq_mib, 4, NULL, NULL, &freq, sizeof(freq))) { 253 if (errno != EPERM) 254 return (-1); 255 } 256 257 return (0); 258 } 259 260 static int 261 get_freq_id(int freq, int *freqs, int numfreqs) 262 { 263 int i = 1; 264 265 while (i < numfreqs) { 266 if (freqs[i] < freq) 267 break; 268 i++; 269 } 270 return (i - 1); 271 } 272 273 /* 274 * Try to use ACPI to find the AC line status. If this fails, fall back 275 * to APM. If nothing succeeds, we'll just run in default mode. 276 */ 277 static void 278 acline_init(void) 279 { 280 acline_mib_len = 4; 281 282 if (sysctlnametomib(ACPIAC, acline_mib, &acline_mib_len) == 0) { 283 acline_mode = ac_sysctl; 284 if (vflag) 285 warnx("using sysctl for AC line status"); 286 #if __powerpc__ 287 } else if (sysctlnametomib(PMUAC, acline_mib, &acline_mib_len) == 0) { 288 acline_mode = ac_sysctl; 289 if (vflag) 290 warnx("using sysctl for AC line status"); 291 #endif 292 #ifdef USE_APM 293 } else if ((apm_fd = open(APMDEV, O_RDONLY)) >= 0) { 294 if (vflag) 295 warnx("using APM for AC line status"); 296 acline_mode = ac_apm; 297 #endif 298 } else { 299 warnx("unable to determine AC line status"); 300 acline_mode = ac_none; 301 } 302 } 303 304 static void 305 acline_read(void) 306 { 307 if (acline_mode == ac_acpi_devd) { 308 char buf[DEVCTL_MAXBUF], *ptr; 309 ssize_t rlen; 310 int notify; 311 312 rlen = read(devd_pipe, buf, sizeof(buf)); 313 if (rlen == 0 || (rlen < 0 && errno != EWOULDBLOCK)) { 314 if (vflag) 315 warnx("lost devd connection, switching to sysctl"); 316 devd_close(); 317 acline_mode = ac_sysctl; 318 /* FALLTHROUGH */ 319 } 320 if (rlen > 0 && 321 (ptr = strstr(buf, "system=ACPI")) != NULL && 322 (ptr = strstr(ptr, "subsystem=ACAD")) != NULL && 323 (ptr = strstr(ptr, "notify=")) != NULL && 324 sscanf(ptr, "notify=%x", ¬ify) == 1) 325 acline_status = (notify ? SRC_AC : SRC_BATTERY); 326 } 327 if (acline_mode == ac_sysctl) { 328 int acline; 329 size_t len; 330 331 len = sizeof(acline); 332 if (sysctl(acline_mib, acline_mib_len, &acline, &len, 333 NULL, 0) == 0) 334 acline_status = (acline ? SRC_AC : SRC_BATTERY); 335 else 336 acline_status = SRC_UNKNOWN; 337 } 338 #ifdef USE_APM 339 if (acline_mode == ac_apm) { 340 struct apm_info info; 341 342 if (ioctl(apm_fd, APMIO_GETINFO, &info) == 0) { 343 acline_status = (info.ai_acline ? SRC_AC : SRC_BATTERY); 344 } else { 345 close(apm_fd); 346 apm_fd = -1; 347 acline_mode = ac_none; 348 acline_status = SRC_UNKNOWN; 349 } 350 } 351 #endif 352 /* try to (re)connect to devd */ 353 if (acline_mode == ac_sysctl) { 354 struct timeval now; 355 356 gettimeofday(&now, NULL); 357 if (now.tv_sec > tried_devd.tv_sec + DEVD_RETRY_INTERVAL) { 358 if (devd_init() >= 0) { 359 if (vflag) 360 warnx("using devd for AC line status"); 361 acline_mode = ac_acpi_devd; 362 } 363 tried_devd = now; 364 } 365 } 366 } 367 368 static int 369 devd_init(void) 370 { 371 struct sockaddr_un devd_addr; 372 373 bzero(&devd_addr, sizeof(devd_addr)); 374 if ((devd_pipe = socket(PF_LOCAL, SOCK_STREAM, 0)) < 0) { 375 if (vflag) 376 warn("%s(): socket()", __func__); 377 return (-1); 378 } 379 380 devd_addr.sun_family = PF_LOCAL; 381 strlcpy(devd_addr.sun_path, DEVDPIPE, sizeof(devd_addr.sun_path)); 382 if (connect(devd_pipe, (struct sockaddr *)&devd_addr, 383 sizeof(devd_addr)) == -1) { 384 if (vflag) 385 warn("%s(): connect()", __func__); 386 close(devd_pipe); 387 devd_pipe = -1; 388 return (-1); 389 } 390 391 if (fcntl(devd_pipe, F_SETFL, O_NONBLOCK) == -1) { 392 if (vflag) 393 warn("%s(): fcntl()", __func__); 394 close(devd_pipe); 395 return (-1); 396 } 397 398 return (devd_pipe); 399 } 400 401 static void 402 devd_close(void) 403 { 404 405 close(devd_pipe); 406 devd_pipe = -1; 407 } 408 409 static void 410 parse_mode(char *arg, int *mode, int ch) 411 { 412 413 if (strcmp(arg, "minimum") == 0 || strcmp(arg, "min") == 0) 414 *mode = MODE_MIN; 415 else if (strcmp(arg, "maximum") == 0 || strcmp(arg, "max") == 0) 416 *mode = MODE_MAX; 417 else if (strcmp(arg, "adaptive") == 0 || strcmp(arg, "adp") == 0) 418 *mode = MODE_ADAPTIVE; 419 else if (strcmp(arg, "hiadaptive") == 0 || strcmp(arg, "hadp") == 0) 420 *mode = MODE_HIADAPTIVE; 421 else 422 errx(1, "bad option: -%c %s", (char)ch, optarg); 423 } 424 425 static void 426 handle_sigs(int __unused sig) 427 { 428 429 exit_requested = 1; 430 } 431 432 static void 433 usage(void) 434 { 435 436 fprintf(stderr, 437 "usage: powerd [-v] [-a mode] [-b mode] [-i %%] [-m freq] [-M freq] [-n mode] [-p ival] [-r %%] [-P pidfile]\n"); 438 exit(1); 439 } 440 441 int 442 main(int argc, char * argv[]) 443 { 444 struct timeval timeout; 445 fd_set fdset; 446 int nfds; 447 struct pidfh *pfh = NULL; 448 const char *pidfile = NULL; 449 int freq, curfreq, initfreq, *freqs, i, j, *mwatts, numfreqs, load; 450 int minfreq = -1, maxfreq = -1; 451 int ch, mode, mode_ac, mode_battery, mode_none, idle, to; 452 uint64_t mjoules_used; 453 size_t len; 454 455 /* Default mode for all AC states is adaptive. */ 456 mode_ac = mode_none = MODE_HIADAPTIVE; 457 mode_battery = MODE_ADAPTIVE; 458 cpu_running_mark = DEFAULT_ACTIVE_PERCENT; 459 cpu_idle_mark = DEFAULT_IDLE_PERCENT; 460 poll_ival = DEFAULT_POLL_INTERVAL; 461 mjoules_used = 0; 462 vflag = 0; 463 464 /* User must be root to control frequencies. */ 465 if (geteuid() != 0) 466 errx(1, "must be root to run"); 467 468 while ((ch = getopt(argc, argv, "a:b:i:m:M:n:p:P:r:v")) != -1) 469 switch (ch) { 470 case 'a': 471 parse_mode(optarg, &mode_ac, ch); 472 break; 473 case 'b': 474 parse_mode(optarg, &mode_battery, ch); 475 break; 476 case 'i': 477 cpu_idle_mark = atoi(optarg); 478 if (cpu_idle_mark < 0 || cpu_idle_mark > 100) { 479 warnx("%d is not a valid percent", 480 cpu_idle_mark); 481 usage(); 482 } 483 break; 484 case 'm': 485 minfreq = atoi(optarg); 486 if (minfreq < 0) { 487 warnx("%d is not a valid CPU frequency", 488 minfreq); 489 usage(); 490 } 491 break; 492 case 'M': 493 maxfreq = atoi(optarg); 494 if (maxfreq < 0) { 495 warnx("%d is not a valid CPU frequency", 496 maxfreq); 497 usage(); 498 } 499 break; 500 case 'n': 501 parse_mode(optarg, &mode_none, ch); 502 break; 503 case 'p': 504 poll_ival = atoi(optarg); 505 if (poll_ival < 5) { 506 warnx("poll interval is in units of ms"); 507 usage(); 508 } 509 break; 510 case 'P': 511 pidfile = optarg; 512 break; 513 case 'r': 514 cpu_running_mark = atoi(optarg); 515 if (cpu_running_mark <= 0 || cpu_running_mark > 100) { 516 warnx("%d is not a valid percent", 517 cpu_running_mark); 518 usage(); 519 } 520 break; 521 case 'v': 522 vflag = 1; 523 break; 524 default: 525 usage(); 526 } 527 528 mode = mode_none; 529 530 /* Poll interval is in units of ms. */ 531 poll_ival *= 1000; 532 533 /* Look up various sysctl MIBs. */ 534 len = 2; 535 if (sysctlnametomib("kern.cp_times", cp_times_mib, &len)) 536 err(1, "lookup kern.cp_times"); 537 len = 4; 538 if (sysctlnametomib("dev.cpu.0.freq", freq_mib, &len)) 539 err(1, "lookup freq"); 540 len = 4; 541 if (sysctlnametomib("dev.cpu.0.freq_levels", levels_mib, &len)) 542 err(1, "lookup freq_levels"); 543 544 /* Check if we can read the load and supported freqs. */ 545 if (read_usage_times(NULL)) 546 err(1, "read_usage_times"); 547 if (read_freqs(&numfreqs, &freqs, &mwatts, minfreq, maxfreq)) 548 err(1, "error reading supported CPU frequencies"); 549 if (numfreqs == 0) 550 errx(1, "no CPU frequencies in user-specified range"); 551 552 /* Run in the background unless in verbose mode. */ 553 if (!vflag) { 554 pid_t otherpid; 555 556 pfh = pidfile_open(pidfile, 0600, &otherpid); 557 if (pfh == NULL) { 558 if (errno == EEXIST) { 559 errx(1, "powerd already running, pid: %d", 560 otherpid); 561 } 562 warn("cannot open pid file"); 563 } 564 if (daemon(0, 0) != 0) { 565 warn("cannot enter daemon mode, exiting"); 566 pidfile_remove(pfh); 567 exit(EXIT_FAILURE); 568 569 } 570 pidfile_write(pfh); 571 } 572 573 /* Decide whether to use ACPI or APM to read the AC line status. */ 574 acline_init(); 575 576 /* 577 * Exit cleanly on signals. 578 */ 579 signal(SIGINT, handle_sigs); 580 signal(SIGTERM, handle_sigs); 581 582 freq = initfreq = curfreq = get_freq(); 583 i = get_freq_id(curfreq, freqs, numfreqs); 584 if (freq < 1) 585 freq = 1; 586 587 /* 588 * If we are in adaptive mode and the current frequency is outside the 589 * user-defined range, adjust it to be within the user-defined range. 590 */ 591 acline_read(); 592 if (acline_status > SRC_UNKNOWN) 593 errx(1, "invalid AC line status %d", acline_status); 594 if ((acline_status == SRC_AC && 595 (mode_ac == MODE_ADAPTIVE || mode_ac == MODE_HIADAPTIVE)) || 596 (acline_status == SRC_BATTERY && 597 (mode_battery == MODE_ADAPTIVE || mode_battery == MODE_HIADAPTIVE)) || 598 (acline_status == SRC_UNKNOWN && 599 (mode_none == MODE_ADAPTIVE || mode_none == MODE_HIADAPTIVE))) { 600 /* Read the current frequency. */ 601 len = sizeof(curfreq); 602 if (sysctl(freq_mib, 4, &curfreq, &len, NULL, 0) != 0) { 603 if (vflag) 604 warn("error reading current CPU frequency"); 605 } 606 if (curfreq < freqs[numfreqs - 1]) { 607 if (vflag) { 608 printf("CPU frequency is below user-defined " 609 "minimum; changing frequency to %d " 610 "MHz\n", freqs[numfreqs - 1]); 611 } 612 if (set_freq(freqs[numfreqs - 1]) != 0) { 613 warn("error setting CPU freq %d", 614 freqs[numfreqs - 1]); 615 } 616 } else if (curfreq > freqs[0]) { 617 if (vflag) { 618 printf("CPU frequency is above user-defined " 619 "maximum; changing frequency to %d " 620 "MHz\n", freqs[0]); 621 } 622 if (set_freq(freqs[0]) != 0) { 623 warn("error setting CPU freq %d", 624 freqs[0]); 625 } 626 } 627 } 628 629 idle = 0; 630 /* Main loop. */ 631 for (;;) { 632 FD_ZERO(&fdset); 633 if (devd_pipe >= 0) { 634 FD_SET(devd_pipe, &fdset); 635 nfds = devd_pipe + 1; 636 } else { 637 nfds = 0; 638 } 639 if (mode == MODE_HIADAPTIVE || idle < 120) 640 to = poll_ival; 641 else if (idle < 360) 642 to = poll_ival * 2; 643 else 644 to = poll_ival * 4; 645 timeout.tv_sec = to / 1000000; 646 timeout.tv_usec = to % 1000000; 647 select(nfds, &fdset, NULL, &fdset, &timeout); 648 649 /* If the user requested we quit, print some statistics. */ 650 if (exit_requested) { 651 if (vflag && mjoules_used != 0) 652 printf("total joules used: %u.%03u\n", 653 (u_int)(mjoules_used / 1000), 654 (int)mjoules_used % 1000); 655 break; 656 } 657 658 /* Read the current AC status and record the mode. */ 659 acline_read(); 660 switch (acline_status) { 661 case SRC_AC: 662 mode = mode_ac; 663 break; 664 case SRC_BATTERY: 665 mode = mode_battery; 666 break; 667 case SRC_UNKNOWN: 668 mode = mode_none; 669 break; 670 default: 671 errx(1, "invalid AC line status %d", acline_status); 672 } 673 674 /* Read the current frequency. */ 675 if (idle % 32 == 0) { 676 if ((curfreq = get_freq()) == 0) 677 continue; 678 i = get_freq_id(curfreq, freqs, numfreqs); 679 } 680 idle++; 681 if (vflag) { 682 /* Keep a sum of all power actually used. */ 683 if (mwatts[i] != -1) 684 mjoules_used += 685 (mwatts[i] * (poll_ival / 1000)) / 1000; 686 } 687 688 /* Always switch to the lowest frequency in min mode. */ 689 if (mode == MODE_MIN) { 690 freq = freqs[numfreqs - 1]; 691 if (curfreq != freq) { 692 if (vflag) { 693 printf("now operating on %s power; " 694 "changing frequency to %d MHz\n", 695 modes[acline_status], freq); 696 } 697 idle = 0; 698 if (set_freq(freq) != 0) { 699 warn("error setting CPU freq %d", 700 freq); 701 continue; 702 } 703 } 704 continue; 705 } 706 707 /* Always switch to the highest frequency in max mode. */ 708 if (mode == MODE_MAX) { 709 freq = freqs[0]; 710 if (curfreq != freq) { 711 if (vflag) { 712 printf("now operating on %s power; " 713 "changing frequency to %d MHz\n", 714 modes[acline_status], freq); 715 } 716 idle = 0; 717 if (set_freq(freq) != 0) { 718 warn("error setting CPU freq %d", 719 freq); 720 continue; 721 } 722 } 723 continue; 724 } 725 726 /* Adaptive mode; get the current CPU usage times. */ 727 if (read_usage_times(&load)) { 728 if (vflag) 729 warn("read_usage_times() failed"); 730 continue; 731 } 732 733 if (mode == MODE_ADAPTIVE) { 734 if (load > cpu_running_mark) { 735 if (load > 95 || load > cpu_running_mark * 2) 736 freq *= 2; 737 else 738 freq = freq * load / cpu_running_mark; 739 if (freq > freqs[0]) 740 freq = freqs[0]; 741 } else if (load < cpu_idle_mark && 742 curfreq * load < freqs[get_freq_id( 743 freq * 7 / 8, freqs, numfreqs)] * 744 cpu_running_mark) { 745 freq = freq * 7 / 8; 746 if (freq < freqs[numfreqs - 1]) 747 freq = freqs[numfreqs - 1]; 748 } 749 } else { /* MODE_HIADAPTIVE */ 750 if (load > cpu_running_mark / 2) { 751 if (load > 95 || load > cpu_running_mark) 752 freq *= 4; 753 else 754 freq = freq * load * 2 / cpu_running_mark; 755 if (freq > freqs[0] * 2) 756 freq = freqs[0] * 2; 757 } else if (load < cpu_idle_mark / 2 && 758 curfreq * load < freqs[get_freq_id( 759 freq * 31 / 32, freqs, numfreqs)] * 760 cpu_running_mark / 2) { 761 freq = freq * 31 / 32; 762 if (freq < freqs[numfreqs - 1]) 763 freq = freqs[numfreqs - 1]; 764 } 765 } 766 if (vflag) { 767 printf("load %3d%%, current freq %4d MHz (%2d), wanted freq %4d MHz\n", 768 load, curfreq, i, freq); 769 } 770 j = get_freq_id(freq, freqs, numfreqs); 771 if (i != j) { 772 if (vflag) { 773 printf("changing clock" 774 " speed from %d MHz to %d MHz\n", 775 freqs[i], freqs[j]); 776 } 777 idle = 0; 778 if (set_freq(freqs[j])) 779 warn("error setting CPU frequency %d", 780 freqs[j]); 781 } 782 } 783 if (set_freq(initfreq)) 784 warn("error setting CPU frequency %d", initfreq); 785 free(freqs); 786 free(mwatts); 787 devd_close(); 788 if (!vflag) 789 pidfile_remove(pfh); 790 791 exit(0); 792 } 793