powerd.c revision 259065
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: releng/10.0/usr.sbin/powerd/powerd.c 252713 2013-07-04 18:59:58Z wblock $"); 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 <sysexits.h> 48#include <unistd.h> 49 50#ifdef __i386__ 51#define USE_APM 52#endif 53 54#ifdef USE_APM 55#include <machine/apm_bios.h> 56#endif 57 58#define DEFAULT_ACTIVE_PERCENT 75 59#define DEFAULT_IDLE_PERCENT 50 60#define DEFAULT_POLL_INTERVAL 250 /* Poll interval in milliseconds */ 61 62typedef enum { 63 MODE_MIN, 64 MODE_ADAPTIVE, 65 MODE_HIADAPTIVE, 66 MODE_MAX, 67} modes_t; 68 69typedef enum { 70 SRC_AC, 71 SRC_BATTERY, 72 SRC_UNKNOWN, 73} power_src_t; 74 75static const char *modes[] = { 76 "AC", 77 "battery", 78 "unknown" 79}; 80 81#define ACPIAC "hw.acpi.acline" 82#define PMUAC "dev.pmu.0.acline" 83#define APMDEV "/dev/apm" 84#define DEVDPIPE "/var/run/devd.pipe" 85#define DEVCTL_MAXBUF 1024 86 87static int read_usage_times(int *load); 88static int read_freqs(int *numfreqs, int **freqs, int **power, 89 int minfreq, int maxfreq); 90static int set_freq(int freq); 91static void acline_init(void); 92static void acline_read(void); 93static int devd_init(void); 94static void devd_close(void); 95static void handle_sigs(int sig); 96static void parse_mode(char *arg, int *mode, int ch); 97static void usage(void); 98 99/* Sysctl data structures. */ 100static int cp_times_mib[2]; 101static int freq_mib[4]; 102static int levels_mib[4]; 103static int acline_mib[4]; 104static size_t acline_mib_len; 105 106/* Configuration */ 107static int cpu_running_mark; 108static int cpu_idle_mark; 109static int poll_ival; 110static int vflag; 111 112static volatile sig_atomic_t exit_requested; 113static power_src_t acline_status; 114static enum { 115 ac_none, 116 ac_sysctl, 117 ac_acpi_devd, 118#ifdef USE_APM 119 ac_apm, 120#endif 121} acline_mode; 122#ifdef USE_APM 123static int apm_fd = -1; 124#endif 125static int devd_pipe = -1; 126 127#define DEVD_RETRY_INTERVAL 60 /* seconds */ 128static struct timeval tried_devd; 129 130static int 131read_usage_times(int *load) 132{ 133 static long *cp_times = NULL, *cp_times_old = NULL; 134 static int ncpus = 0; 135 size_t cp_times_len; 136 int error, cpu, i, total; 137 138 if (cp_times == NULL) { 139 cp_times_len = 0; 140 error = sysctl(cp_times_mib, 2, NULL, &cp_times_len, NULL, 0); 141 if (error) 142 return (error); 143 if ((cp_times = malloc(cp_times_len)) == NULL) 144 return (errno); 145 if ((cp_times_old = malloc(cp_times_len)) == NULL) { 146 free(cp_times); 147 cp_times = NULL; 148 return (errno); 149 } 150 ncpus = cp_times_len / (sizeof(long) * CPUSTATES); 151 } 152 153 cp_times_len = sizeof(long) * CPUSTATES * ncpus; 154 error = sysctl(cp_times_mib, 2, cp_times, &cp_times_len, NULL, 0); 155 if (error) 156 return (error); 157 158 if (load) { 159 *load = 0; 160 for (cpu = 0; cpu < ncpus; cpu++) { 161 total = 0; 162 for (i = 0; i < CPUSTATES; i++) { 163 total += cp_times[cpu * CPUSTATES + i] - 164 cp_times_old[cpu * CPUSTATES + i]; 165 } 166 if (total == 0) 167 continue; 168 *load += 100 - (cp_times[cpu * CPUSTATES + CP_IDLE] - 169 cp_times_old[cpu * CPUSTATES + CP_IDLE]) * 100 / total; 170 } 171 } 172 173 memcpy(cp_times_old, cp_times, cp_times_len); 174 175 return (0); 176} 177 178static int 179read_freqs(int *numfreqs, int **freqs, int **power, int minfreq, int maxfreq) 180{ 181 char *freqstr, *p, *q; 182 int i, j; 183 size_t len = 0; 184 185 if (sysctl(levels_mib, 4, NULL, &len, NULL, 0)) 186 return (-1); 187 if ((freqstr = malloc(len)) == NULL) 188 return (-1); 189 if (sysctl(levels_mib, 4, freqstr, &len, NULL, 0)) 190 return (-1); 191 192 *numfreqs = 1; 193 for (p = freqstr; *p != '\0'; p++) 194 if (*p == ' ') 195 (*numfreqs)++; 196 197 if ((*freqs = malloc(*numfreqs * sizeof(int))) == NULL) { 198 free(freqstr); 199 return (-1); 200 } 201 if ((*power = malloc(*numfreqs * sizeof(int))) == NULL) { 202 free(freqstr); 203 free(*freqs); 204 return (-1); 205 } 206 for (i = 0, j = 0, p = freqstr; i < *numfreqs; i++) { 207 q = strchr(p, ' '); 208 if (q != NULL) 209 *q = '\0'; 210 if (sscanf(p, "%d/%d", &(*freqs)[j], &(*power)[i]) != 2) { 211 free(freqstr); 212 free(*freqs); 213 free(*power); 214 return (-1); 215 } 216 if (((*freqs)[j] >= minfreq || minfreq == -1) && 217 ((*freqs)[j] <= maxfreq || maxfreq == -1)) 218 j++; 219 p = q + 1; 220 } 221 222 *numfreqs = j; 223 if ((*freqs = realloc(*freqs, *numfreqs * sizeof(int))) == NULL) { 224 free(freqstr); 225 free(*freqs); 226 free(*power); 227 return (-1); 228 } 229 230 free(freqstr); 231 return (0); 232} 233 234static int 235get_freq(void) 236{ 237 size_t len; 238 int curfreq; 239 240 len = sizeof(curfreq); 241 if (sysctl(freq_mib, 4, &curfreq, &len, NULL, 0) != 0) { 242 if (vflag) 243 warn("error reading current CPU frequency"); 244 curfreq = 0; 245 } 246 return (curfreq); 247} 248 249static int 250set_freq(int freq) 251{ 252 253 if (sysctl(freq_mib, 4, NULL, NULL, &freq, sizeof(freq))) { 254 if (errno != EPERM) 255 return (-1); 256 } 257 258 return (0); 259} 260 261static int 262get_freq_id(int freq, int *freqs, int numfreqs) 263{ 264 int i = 1; 265 266 while (i < numfreqs) { 267 if (freqs[i] < freq) 268 break; 269 i++; 270 } 271 return (i - 1); 272} 273 274/* 275 * Try to use ACPI to find the AC line status. If this fails, fall back 276 * to APM. If nothing succeeds, we'll just run in default mode. 277 */ 278static void 279acline_init(void) 280{ 281 acline_mib_len = 4; 282 283 if (sysctlnametomib(ACPIAC, acline_mib, &acline_mib_len) == 0) { 284 acline_mode = ac_sysctl; 285 if (vflag) 286 warnx("using sysctl for AC line status"); 287#if __powerpc__ 288 } else if (sysctlnametomib(PMUAC, acline_mib, &acline_mib_len) == 0) { 289 acline_mode = ac_sysctl; 290 if (vflag) 291 warnx("using sysctl for AC line status"); 292#endif 293#ifdef USE_APM 294 } else if ((apm_fd = open(APMDEV, O_RDONLY)) >= 0) { 295 if (vflag) 296 warnx("using APM for AC line status"); 297 acline_mode = ac_apm; 298#endif 299 } else { 300 warnx("unable to determine AC line status"); 301 acline_mode = ac_none; 302 } 303} 304 305static void 306acline_read(void) 307{ 308 if (acline_mode == ac_acpi_devd) { 309 char buf[DEVCTL_MAXBUF], *ptr; 310 ssize_t rlen; 311 int notify; 312 313 rlen = read(devd_pipe, buf, sizeof(buf)); 314 if (rlen == 0 || (rlen < 0 && errno != EWOULDBLOCK)) { 315 if (vflag) 316 warnx("lost devd connection, switching to sysctl"); 317 devd_close(); 318 acline_mode = ac_sysctl; 319 /* FALLTHROUGH */ 320 } 321 if (rlen > 0 && 322 (ptr = strstr(buf, "system=ACPI")) != NULL && 323 (ptr = strstr(ptr, "subsystem=ACAD")) != NULL && 324 (ptr = strstr(ptr, "notify=")) != NULL && 325 sscanf(ptr, "notify=%x", ¬ify) == 1) 326 acline_status = (notify ? SRC_AC : SRC_BATTERY); 327 } 328 if (acline_mode == ac_sysctl) { 329 int acline; 330 size_t len; 331 332 len = sizeof(acline); 333 if (sysctl(acline_mib, acline_mib_len, &acline, &len, 334 NULL, 0) == 0) 335 acline_status = (acline ? SRC_AC : SRC_BATTERY); 336 else 337 acline_status = SRC_UNKNOWN; 338 } 339#ifdef USE_APM 340 if (acline_mode == ac_apm) { 341 struct apm_info info; 342 343 if (ioctl(apm_fd, APMIO_GETINFO, &info) == 0) { 344 acline_status = (info.ai_acline ? SRC_AC : SRC_BATTERY); 345 } else { 346 close(apm_fd); 347 apm_fd = -1; 348 acline_mode = ac_none; 349 acline_status = SRC_UNKNOWN; 350 } 351 } 352#endif 353 /* try to (re)connect to devd */ 354 if (acline_mode == ac_sysctl) { 355 struct timeval now; 356 357 gettimeofday(&now, NULL); 358 if (now.tv_sec > tried_devd.tv_sec + DEVD_RETRY_INTERVAL) { 359 if (devd_init() >= 0) { 360 if (vflag) 361 warnx("using devd for AC line status"); 362 acline_mode = ac_acpi_devd; 363 } 364 tried_devd = now; 365 } 366 } 367} 368 369static int 370devd_init(void) 371{ 372 struct sockaddr_un devd_addr; 373 374 bzero(&devd_addr, sizeof(devd_addr)); 375 if ((devd_pipe = socket(PF_LOCAL, SOCK_STREAM, 0)) < 0) { 376 if (vflag) 377 warn("%s(): socket()", __func__); 378 return (-1); 379 } 380 381 devd_addr.sun_family = PF_LOCAL; 382 strlcpy(devd_addr.sun_path, DEVDPIPE, sizeof(devd_addr.sun_path)); 383 if (connect(devd_pipe, (struct sockaddr *)&devd_addr, 384 sizeof(devd_addr)) == -1) { 385 if (vflag) 386 warn("%s(): connect()", __func__); 387 close(devd_pipe); 388 devd_pipe = -1; 389 return (-1); 390 } 391 392 if (fcntl(devd_pipe, F_SETFL, O_NONBLOCK) == -1) { 393 if (vflag) 394 warn("%s(): fcntl()", __func__); 395 close(devd_pipe); 396 return (-1); 397 } 398 399 return (devd_pipe); 400} 401 402static void 403devd_close(void) 404{ 405 406 close(devd_pipe); 407 devd_pipe = -1; 408} 409 410static void 411parse_mode(char *arg, int *mode, int ch) 412{ 413 414 if (strcmp(arg, "minimum") == 0 || strcmp(arg, "min") == 0) 415 *mode = MODE_MIN; 416 else if (strcmp(arg, "maximum") == 0 || strcmp(arg, "max") == 0) 417 *mode = MODE_MAX; 418 else if (strcmp(arg, "adaptive") == 0 || strcmp(arg, "adp") == 0) 419 *mode = MODE_ADAPTIVE; 420 else if (strcmp(arg, "hiadaptive") == 0 || strcmp(arg, "hadp") == 0) 421 *mode = MODE_HIADAPTIVE; 422 else 423 errx(1, "bad option: -%c %s", (char)ch, optarg); 424} 425 426static void 427handle_sigs(int __unused sig) 428{ 429 430 exit_requested = 1; 431} 432 433static void 434usage(void) 435{ 436 437 fprintf(stderr, 438"usage: powerd [-v] [-a mode] [-b mode] [-i %%] [-m freq] [-M freq] [-n mode] [-p ival] [-r %%] [-P pidfile]\n"); 439 exit(1); 440} 441 442int 443main(int argc, char * argv[]) 444{ 445 struct timeval timeout; 446 fd_set fdset; 447 int nfds; 448 struct pidfh *pfh = NULL; 449 const char *pidfile = NULL; 450 int freq, curfreq, initfreq, *freqs, i, j, *mwatts, numfreqs, load; 451 int minfreq = -1, maxfreq = -1; 452 int ch, mode, mode_ac, mode_battery, mode_none, idle, to; 453 uint64_t mjoules_used; 454 size_t len; 455 456 /* Default mode for all AC states is adaptive. */ 457 mode_ac = mode_none = MODE_HIADAPTIVE; 458 mode_battery = MODE_ADAPTIVE; 459 cpu_running_mark = DEFAULT_ACTIVE_PERCENT; 460 cpu_idle_mark = DEFAULT_IDLE_PERCENT; 461 poll_ival = DEFAULT_POLL_INTERVAL; 462 mjoules_used = 0; 463 vflag = 0; 464 465 /* User must be root to control frequencies. */ 466 if (geteuid() != 0) 467 errx(1, "must be root to run"); 468 469 while ((ch = getopt(argc, argv, "a:b:i:m:M:n:p:P:r:v")) != -1) 470 switch (ch) { 471 case 'a': 472 parse_mode(optarg, &mode_ac, ch); 473 break; 474 case 'b': 475 parse_mode(optarg, &mode_battery, ch); 476 break; 477 case 'i': 478 cpu_idle_mark = atoi(optarg); 479 if (cpu_idle_mark < 0 || cpu_idle_mark > 100) { 480 warnx("%d is not a valid percent", 481 cpu_idle_mark); 482 usage(); 483 } 484 break; 485 case 'm': 486 minfreq = atoi(optarg); 487 if (minfreq < 0) { 488 warnx("%d is not a valid CPU frequency", 489 minfreq); 490 usage(); 491 } 492 break; 493 case 'M': 494 maxfreq = atoi(optarg); 495 if (maxfreq < 0) { 496 warnx("%d is not a valid CPU frequency", 497 maxfreq); 498 usage(); 499 } 500 break; 501 case 'n': 502 parse_mode(optarg, &mode_none, ch); 503 break; 504 case 'p': 505 poll_ival = atoi(optarg); 506 if (poll_ival < 5) { 507 warnx("poll interval is in units of ms"); 508 usage(); 509 } 510 break; 511 case 'P': 512 pidfile = optarg; 513 break; 514 case 'r': 515 cpu_running_mark = atoi(optarg); 516 if (cpu_running_mark <= 0 || cpu_running_mark > 100) { 517 warnx("%d is not a valid percent", 518 cpu_running_mark); 519 usage(); 520 } 521 break; 522 case 'v': 523 vflag = 1; 524 break; 525 default: 526 usage(); 527 } 528 529 mode = mode_none; 530 531 /* Poll interval is in units of ms. */ 532 poll_ival *= 1000; 533 534 /* Look up various sysctl MIBs. */ 535 len = 2; 536 if (sysctlnametomib("kern.cp_times", cp_times_mib, &len)) 537 err(1, "lookup kern.cp_times"); 538 len = 4; 539 if (sysctlnametomib("dev.cpu.0.freq", freq_mib, &len)) 540 err(EX_UNAVAILABLE, "no cpufreq(4) support -- aborting"); 541 len = 4; 542 if (sysctlnametomib("dev.cpu.0.freq_levels", levels_mib, &len)) 543 err(1, "lookup freq_levels"); 544 545 /* Check if we can read the load and supported freqs. */ 546 if (read_usage_times(NULL)) 547 err(1, "read_usage_times"); 548 if (read_freqs(&numfreqs, &freqs, &mwatts, minfreq, maxfreq)) 549 err(1, "error reading supported CPU frequencies"); 550 if (numfreqs == 0) 551 errx(1, "no CPU frequencies in user-specified range"); 552 553 /* Run in the background unless in verbose mode. */ 554 if (!vflag) { 555 pid_t otherpid; 556 557 pfh = pidfile_open(pidfile, 0600, &otherpid); 558 if (pfh == NULL) { 559 if (errno == EEXIST) { 560 errx(1, "powerd already running, pid: %d", 561 otherpid); 562 } 563 warn("cannot open pid file"); 564 } 565 if (daemon(0, 0) != 0) { 566 warn("cannot enter daemon mode, exiting"); 567 pidfile_remove(pfh); 568 exit(EXIT_FAILURE); 569 570 } 571 pidfile_write(pfh); 572 } 573 574 /* Decide whether to use ACPI or APM to read the AC line status. */ 575 acline_init(); 576 577 /* 578 * Exit cleanly on signals. 579 */ 580 signal(SIGINT, handle_sigs); 581 signal(SIGTERM, handle_sigs); 582 583 freq = initfreq = curfreq = get_freq(); 584 i = get_freq_id(curfreq, freqs, numfreqs); 585 if (freq < 1) 586 freq = 1; 587 588 /* 589 * If we are in adaptive mode and the current frequency is outside the 590 * user-defined range, adjust it to be within the user-defined range. 591 */ 592 acline_read(); 593 if (acline_status > SRC_UNKNOWN) 594 errx(1, "invalid AC line status %d", acline_status); 595 if ((acline_status == SRC_AC && 596 (mode_ac == MODE_ADAPTIVE || mode_ac == MODE_HIADAPTIVE)) || 597 (acline_status == SRC_BATTERY && 598 (mode_battery == MODE_ADAPTIVE || mode_battery == MODE_HIADAPTIVE)) || 599 (acline_status == SRC_UNKNOWN && 600 (mode_none == MODE_ADAPTIVE || mode_none == MODE_HIADAPTIVE))) { 601 /* Read the current frequency. */ 602 len = sizeof(curfreq); 603 if (sysctl(freq_mib, 4, &curfreq, &len, NULL, 0) != 0) { 604 if (vflag) 605 warn("error reading current CPU frequency"); 606 } 607 if (curfreq < freqs[numfreqs - 1]) { 608 if (vflag) { 609 printf("CPU frequency is below user-defined " 610 "minimum; changing frequency to %d " 611 "MHz\n", freqs[numfreqs - 1]); 612 } 613 if (set_freq(freqs[numfreqs - 1]) != 0) { 614 warn("error setting CPU freq %d", 615 freqs[numfreqs - 1]); 616 } 617 } else if (curfreq > freqs[0]) { 618 if (vflag) { 619 printf("CPU frequency is above user-defined " 620 "maximum; changing frequency to %d " 621 "MHz\n", freqs[0]); 622 } 623 if (set_freq(freqs[0]) != 0) { 624 warn("error setting CPU freq %d", 625 freqs[0]); 626 } 627 } 628 } 629 630 idle = 0; 631 /* Main loop. */ 632 for (;;) { 633 FD_ZERO(&fdset); 634 if (devd_pipe >= 0) { 635 FD_SET(devd_pipe, &fdset); 636 nfds = devd_pipe + 1; 637 } else { 638 nfds = 0; 639 } 640 if (mode == MODE_HIADAPTIVE || idle < 120) 641 to = poll_ival; 642 else if (idle < 360) 643 to = poll_ival * 2; 644 else 645 to = poll_ival * 4; 646 timeout.tv_sec = to / 1000000; 647 timeout.tv_usec = to % 1000000; 648 select(nfds, &fdset, NULL, &fdset, &timeout); 649 650 /* If the user requested we quit, print some statistics. */ 651 if (exit_requested) { 652 if (vflag && mjoules_used != 0) 653 printf("total joules used: %u.%03u\n", 654 (u_int)(mjoules_used / 1000), 655 (int)mjoules_used % 1000); 656 break; 657 } 658 659 /* Read the current AC status and record the mode. */ 660 acline_read(); 661 switch (acline_status) { 662 case SRC_AC: 663 mode = mode_ac; 664 break; 665 case SRC_BATTERY: 666 mode = mode_battery; 667 break; 668 case SRC_UNKNOWN: 669 mode = mode_none; 670 break; 671 default: 672 errx(1, "invalid AC line status %d", acline_status); 673 } 674 675 /* Read the current frequency. */ 676 if (idle % 32 == 0) { 677 if ((curfreq = get_freq()) == 0) 678 continue; 679 i = get_freq_id(curfreq, freqs, numfreqs); 680 } 681 idle++; 682 if (vflag) { 683 /* Keep a sum of all power actually used. */ 684 if (mwatts[i] != -1) 685 mjoules_used += 686 (mwatts[i] * (poll_ival / 1000)) / 1000; 687 } 688 689 /* Always switch to the lowest frequency in min mode. */ 690 if (mode == MODE_MIN) { 691 freq = freqs[numfreqs - 1]; 692 if (curfreq != freq) { 693 if (vflag) { 694 printf("now operating on %s power; " 695 "changing frequency to %d MHz\n", 696 modes[acline_status], freq); 697 } 698 idle = 0; 699 if (set_freq(freq) != 0) { 700 warn("error setting CPU freq %d", 701 freq); 702 continue; 703 } 704 } 705 continue; 706 } 707 708 /* Always switch to the highest frequency in max mode. */ 709 if (mode == MODE_MAX) { 710 freq = freqs[0]; 711 if (curfreq != freq) { 712 if (vflag) { 713 printf("now operating on %s power; " 714 "changing frequency to %d MHz\n", 715 modes[acline_status], freq); 716 } 717 idle = 0; 718 if (set_freq(freq) != 0) { 719 warn("error setting CPU freq %d", 720 freq); 721 continue; 722 } 723 } 724 continue; 725 } 726 727 /* Adaptive mode; get the current CPU usage times. */ 728 if (read_usage_times(&load)) { 729 if (vflag) 730 warn("read_usage_times() failed"); 731 continue; 732 } 733 734 if (mode == MODE_ADAPTIVE) { 735 if (load > cpu_running_mark) { 736 if (load > 95 || load > cpu_running_mark * 2) 737 freq *= 2; 738 else 739 freq = freq * load / cpu_running_mark; 740 if (freq > freqs[0]) 741 freq = freqs[0]; 742 } else if (load < cpu_idle_mark && 743 curfreq * load < freqs[get_freq_id( 744 freq * 7 / 8, freqs, numfreqs)] * 745 cpu_running_mark) { 746 freq = freq * 7 / 8; 747 if (freq < freqs[numfreqs - 1]) 748 freq = freqs[numfreqs - 1]; 749 } 750 } else { /* MODE_HIADAPTIVE */ 751 if (load > cpu_running_mark / 2) { 752 if (load > 95 || load > cpu_running_mark) 753 freq *= 4; 754 else 755 freq = freq * load * 2 / cpu_running_mark; 756 if (freq > freqs[0] * 2) 757 freq = freqs[0] * 2; 758 } else if (load < cpu_idle_mark / 2 && 759 curfreq * load < freqs[get_freq_id( 760 freq * 31 / 32, freqs, numfreqs)] * 761 cpu_running_mark / 2) { 762 freq = freq * 31 / 32; 763 if (freq < freqs[numfreqs - 1]) 764 freq = freqs[numfreqs - 1]; 765 } 766 } 767 if (vflag) { 768 printf("load %3d%%, current freq %4d MHz (%2d), wanted freq %4d MHz\n", 769 load, curfreq, i, freq); 770 } 771 j = get_freq_id(freq, freqs, numfreqs); 772 if (i != j) { 773 if (vflag) { 774 printf("changing clock" 775 " speed from %d MHz to %d MHz\n", 776 freqs[i], freqs[j]); 777 } 778 idle = 0; 779 if (set_freq(freqs[j])) 780 warn("error setting CPU frequency %d", 781 freqs[j]); 782 } 783 } 784 if (set_freq(initfreq)) 785 warn("error setting CPU frequency %d", initfreq); 786 free(freqs); 787 free(mwatts); 788 devd_close(); 789 if (!vflag) 790 pidfile_remove(pfh); 791 792 exit(0); 793} 794