1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2004 Colin Percival 5 * Copyright (c) 2005 Nate Lawson 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted providing that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 25 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 26 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 27 * POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include <sys/param.h> 34 #include <sys/ioctl.h> 35 #include <sys/sysctl.h> 36 #include <sys/resource.h> 37 #include <sys/socket.h> 38 #include <sys/time.h> 39 #include <sys/un.h> 40 41 #include <err.h> 42 #include <errno.h> 43 #include <fcntl.h> 44 #include <libutil.h> 45 #include <signal.h> 46 #include <stdio.h> 47 #include <stdlib.h> 48 #include <string.h> 49 #include <sysexits.h> 50 #include <unistd.h> 51 52 #ifdef __i386__ 53 #define USE_APM 54 #endif 55 56 #ifdef USE_APM 57 #include <machine/apm_bios.h> 58 #endif 59 60 #define DEFAULT_ACTIVE_PERCENT 75 61 #define DEFAULT_IDLE_PERCENT 50 62 #define DEFAULT_POLL_INTERVAL 250 /* Poll interval in milliseconds */ 63 64 typedef enum { 65 MODE_MIN, 66 MODE_ADAPTIVE, 67 MODE_HIADAPTIVE, 68 MODE_MAX, 69 } modes_t; 70 71 typedef enum { 72 SRC_AC, 73 SRC_BATTERY, 74 SRC_UNKNOWN, 75 } power_src_t; 76 77 static const char *modes[] = { 78 "AC", 79 "battery", 80 "unknown" 81 }; 82 83 #define ACPIAC "hw.acpi.acline" 84 #define PMUAC "dev.pmu.0.acline" 85 #define APMDEV "/dev/apm" 86 #define DEVDPIPE "/var/run/devd.pipe" 87 #define DEVCTL_MAXBUF 1024 88 89 static int read_usage_times(int *load); 90 static int read_freqs(int *numfreqs, int **freqs, int **power, 91 int minfreq, int maxfreq); 92 static int set_freq(int freq); 93 static void acline_init(void); 94 static void acline_read(void); 95 static int devd_init(void); 96 static void devd_close(void); 97 static void handle_sigs(int sig); 98 static void parse_mode(char *arg, int *mode, int ch); 99 static void usage(void); 100 101 /* Sysctl data structures. */ 102 static int cp_times_mib[2]; 103 static int freq_mib[4]; 104 static int levels_mib[4]; 105 static int acline_mib[4]; 106 static size_t acline_mib_len; 107 108 /* Configuration */ 109 static int cpu_running_mark; 110 static int cpu_idle_mark; 111 static int poll_ival; 112 static int vflag; 113 114 static volatile sig_atomic_t exit_requested; 115 static power_src_t acline_status; 116 static enum { 117 ac_none, 118 ac_sysctl, 119 ac_acpi_devd, 120 #ifdef USE_APM 121 ac_apm, 122 #endif 123 } acline_mode; 124 #ifdef USE_APM 125 static int apm_fd = -1; 126 #endif 127 static int devd_pipe = -1; 128 129 #define DEVD_RETRY_INTERVAL 60 /* seconds */ 130 static struct timeval tried_devd; 131 132 /* 133 * This function returns summary load of all CPUs. It was made so 134 * intentionally to not reduce performance in scenarios when several 135 * threads are processing requests as a pipeline -- running one at 136 * a time on different CPUs and waiting for each other. 137 */ 138 static int 139 read_usage_times(int *load) 140 { 141 static long *cp_times = NULL, *cp_times_old = NULL; 142 static int ncpus = 0; 143 size_t cp_times_len; 144 int error, cpu, i, total; 145 146 if (cp_times == NULL) { 147 cp_times_len = 0; 148 error = sysctl(cp_times_mib, 2, NULL, &cp_times_len, NULL, 0); 149 if (error) 150 return (error); 151 if ((cp_times = malloc(cp_times_len)) == NULL) 152 return (errno); 153 if ((cp_times_old = malloc(cp_times_len)) == NULL) { 154 free(cp_times); 155 cp_times = NULL; 156 return (errno); 157 } 158 ncpus = cp_times_len / (sizeof(long) * CPUSTATES); 159 } 160 161 cp_times_len = sizeof(long) * CPUSTATES * ncpus; 162 error = sysctl(cp_times_mib, 2, cp_times, &cp_times_len, NULL, 0); 163 if (error) 164 return (error); 165 166 if (load) { 167 *load = 0; 168 for (cpu = 0; cpu < ncpus; cpu++) { 169 total = 0; 170 for (i = 0; i < CPUSTATES; i++) { 171 total += cp_times[cpu * CPUSTATES + i] - 172 cp_times_old[cpu * CPUSTATES + i]; 173 } 174 if (total == 0) 175 continue; 176 *load += 100 - (cp_times[cpu * CPUSTATES + CP_IDLE] - 177 cp_times_old[cpu * CPUSTATES + CP_IDLE]) * 100 / total; 178 } 179 } 180 181 memcpy(cp_times_old, cp_times, cp_times_len); 182 183 return (0); 184 } 185 186 static int 187 read_freqs(int *numfreqs, int **freqs, int **power, int minfreq, int maxfreq) 188 { 189 char *freqstr, *p, *q; 190 int i, j; 191 size_t len = 0; 192 193 if (sysctl(levels_mib, 4, NULL, &len, NULL, 0)) 194 return (-1); 195 if ((freqstr = malloc(len)) == NULL) 196 return (-1); 197 if (sysctl(levels_mib, 4, freqstr, &len, NULL, 0)) 198 return (-1); 199 200 *numfreqs = 1; 201 for (p = freqstr; *p != '\0'; p++) 202 if (*p == ' ') 203 (*numfreqs)++; 204 205 if ((*freqs = malloc(*numfreqs * sizeof(int))) == NULL) { 206 free(freqstr); 207 return (-1); 208 } 209 if ((*power = malloc(*numfreqs * sizeof(int))) == NULL) { 210 free(freqstr); 211 free(*freqs); 212 return (-1); 213 } 214 for (i = 0, j = 0, p = freqstr; i < *numfreqs; i++) { 215 q = strchr(p, ' '); 216 if (q != NULL) 217 *q = '\0'; 218 if (sscanf(p, "%d/%d", &(*freqs)[j], &(*power)[i]) != 2) { 219 free(freqstr); 220 free(*freqs); 221 free(*power); 222 return (-1); 223 } 224 if (((*freqs)[j] >= minfreq || minfreq == -1) && 225 ((*freqs)[j] <= maxfreq || maxfreq == -1)) 226 j++; 227 p = q + 1; 228 } 229 230 *numfreqs = j; 231 if ((*freqs = realloc(*freqs, *numfreqs * sizeof(int))) == NULL) { 232 free(freqstr); 233 free(*freqs); 234 free(*power); 235 return (-1); 236 } 237 238 free(freqstr); 239 return (0); 240 } 241 242 static int 243 get_freq(void) 244 { 245 size_t len; 246 int curfreq; 247 248 len = sizeof(curfreq); 249 if (sysctl(freq_mib, 4, &curfreq, &len, NULL, 0) != 0) { 250 if (vflag) 251 warn("error reading current CPU frequency"); 252 curfreq = 0; 253 } 254 return (curfreq); 255 } 256 257 static int 258 set_freq(int freq) 259 { 260 261 if (sysctl(freq_mib, 4, NULL, NULL, &freq, sizeof(freq))) { 262 if (errno != EPERM) 263 return (-1); 264 } 265 266 return (0); 267 } 268 269 static int 270 get_freq_id(int freq, int *freqs, int numfreqs) 271 { 272 int i = 1; 273 274 while (i < numfreqs) { 275 if (freqs[i] < freq) 276 break; 277 i++; 278 } 279 return (i - 1); 280 } 281 282 /* 283 * Try to use ACPI to find the AC line status. If this fails, fall back 284 * to APM. If nothing succeeds, we'll just run in default mode. 285 */ 286 static void 287 acline_init(void) 288 { 289 acline_mib_len = 4; 290 acline_status = SRC_UNKNOWN; 291 292 if (sysctlnametomib(ACPIAC, acline_mib, &acline_mib_len) == 0) { 293 acline_mode = ac_sysctl; 294 if (vflag) 295 warnx("using sysctl for AC line status"); 296 #if __powerpc__ 297 } else if (sysctlnametomib(PMUAC, acline_mib, &acline_mib_len) == 0) { 298 acline_mode = ac_sysctl; 299 if (vflag) 300 warnx("using sysctl for AC line status"); 301 #endif 302 #ifdef USE_APM 303 } else if ((apm_fd = open(APMDEV, O_RDONLY)) >= 0) { 304 if (vflag) 305 warnx("using APM for AC line status"); 306 acline_mode = ac_apm; 307 #endif 308 } else { 309 warnx("unable to determine AC line status"); 310 acline_mode = ac_none; 311 } 312 } 313 314 static void 315 acline_read(void) 316 { 317 if (acline_mode == ac_acpi_devd) { 318 char buf[DEVCTL_MAXBUF], *ptr; 319 ssize_t rlen; 320 int notify; 321 322 rlen = read(devd_pipe, buf, sizeof(buf)); 323 if (rlen == 0 || (rlen < 0 && errno != EWOULDBLOCK)) { 324 if (vflag) 325 warnx("lost devd connection, switching to sysctl"); 326 devd_close(); 327 acline_mode = ac_sysctl; 328 /* FALLTHROUGH */ 329 } 330 if (rlen > 0 && 331 (ptr = strstr(buf, "system=ACPI")) != NULL && 332 (ptr = strstr(ptr, "subsystem=ACAD")) != NULL && 333 (ptr = strstr(ptr, "notify=")) != NULL && 334 sscanf(ptr, "notify=%x", ¬ify) == 1) 335 acline_status = (notify ? SRC_AC : SRC_BATTERY); 336 } 337 if (acline_mode == ac_sysctl) { 338 int acline; 339 size_t len; 340 341 len = sizeof(acline); 342 if (sysctl(acline_mib, acline_mib_len, &acline, &len, 343 NULL, 0) == 0) 344 acline_status = (acline ? SRC_AC : SRC_BATTERY); 345 else 346 acline_status = SRC_UNKNOWN; 347 } 348 #ifdef USE_APM 349 if (acline_mode == ac_apm) { 350 struct apm_info info; 351 352 if (ioctl(apm_fd, APMIO_GETINFO, &info) == 0) { 353 acline_status = (info.ai_acline ? SRC_AC : SRC_BATTERY); 354 } else { 355 close(apm_fd); 356 apm_fd = -1; 357 acline_mode = ac_none; 358 acline_status = SRC_UNKNOWN; 359 } 360 } 361 #endif 362 /* try to (re)connect to devd */ 363 if (acline_mode == ac_sysctl) { 364 struct timeval now; 365 366 gettimeofday(&now, NULL); 367 if (now.tv_sec > tried_devd.tv_sec + DEVD_RETRY_INTERVAL) { 368 if (devd_init() >= 0) { 369 if (vflag) 370 warnx("using devd for AC line status"); 371 acline_mode = ac_acpi_devd; 372 } 373 tried_devd = now; 374 } 375 } 376 } 377 378 static int 379 devd_init(void) 380 { 381 struct sockaddr_un devd_addr; 382 383 bzero(&devd_addr, sizeof(devd_addr)); 384 if ((devd_pipe = socket(PF_LOCAL, SOCK_STREAM|SOCK_NONBLOCK, 0)) < 0) { 385 if (vflag) 386 warn("%s(): socket()", __func__); 387 return (-1); 388 } 389 390 devd_addr.sun_family = PF_LOCAL; 391 strlcpy(devd_addr.sun_path, DEVDPIPE, sizeof(devd_addr.sun_path)); 392 if (connect(devd_pipe, (struct sockaddr *)&devd_addr, 393 sizeof(devd_addr)) == -1) { 394 if (vflag) 395 warn("%s(): connect()", __func__); 396 close(devd_pipe); 397 devd_pipe = -1; 398 return (-1); 399 } 400 401 return (devd_pipe); 402 } 403 404 static void 405 devd_close(void) 406 { 407 408 close(devd_pipe); 409 devd_pipe = -1; 410 } 411 412 static void 413 parse_mode(char *arg, int *mode, int ch) 414 { 415 416 if (strcmp(arg, "minimum") == 0 || strcmp(arg, "min") == 0) 417 *mode = MODE_MIN; 418 else if (strcmp(arg, "maximum") == 0 || strcmp(arg, "max") == 0) 419 *mode = MODE_MAX; 420 else if (strcmp(arg, "adaptive") == 0 || strcmp(arg, "adp") == 0) 421 *mode = MODE_ADAPTIVE; 422 else if (strcmp(arg, "hiadaptive") == 0 || strcmp(arg, "hadp") == 0) 423 *mode = MODE_HIADAPTIVE; 424 else 425 errx(1, "bad option: -%c %s", (char)ch, optarg); 426 } 427 428 static void 429 handle_sigs(int __unused sig) 430 { 431 432 exit_requested = 1; 433 } 434 435 static void 436 usage(void) 437 { 438 439 fprintf(stderr, 440 "usage: powerd [-v] [-a mode] [-b mode] [-i %%] [-m freq] [-M freq] [-n mode] [-p ival] [-r %%] [-P pidfile]\n"); 441 exit(1); 442 } 443 444 int 445 main(int argc, char * argv[]) 446 { 447 struct timeval timeout; 448 fd_set fdset; 449 int nfds; 450 struct pidfh *pfh = NULL; 451 const char *pidfile = NULL; 452 int freq, curfreq, initfreq, *freqs, i, j, *mwatts, numfreqs, load; 453 int minfreq = -1, maxfreq = -1; 454 int ch, mode, mode_ac, mode_battery, mode_none, idle, to; 455 uint64_t mjoules_used; 456 size_t len; 457 458 /* Default mode for all AC states is adaptive. */ 459 mode_ac = mode_none = MODE_HIADAPTIVE; 460 mode_battery = MODE_ADAPTIVE; 461 cpu_running_mark = DEFAULT_ACTIVE_PERCENT; 462 cpu_idle_mark = DEFAULT_IDLE_PERCENT; 463 poll_ival = DEFAULT_POLL_INTERVAL; 464 mjoules_used = 0; 465 vflag = 0; 466 467 /* User must be root to control frequencies. */ 468 if (geteuid() != 0) 469 errx(1, "must be root to run"); 470 471 while ((ch = getopt(argc, argv, "a:b:i:m:M:n:p:P:r:v")) != -1) 472 switch (ch) { 473 case 'a': 474 parse_mode(optarg, &mode_ac, ch); 475 break; 476 case 'b': 477 parse_mode(optarg, &mode_battery, ch); 478 break; 479 case 'i': 480 cpu_idle_mark = atoi(optarg); 481 if (cpu_idle_mark < 0 || cpu_idle_mark > 100) { 482 warnx("%d is not a valid percent", 483 cpu_idle_mark); 484 usage(); 485 } 486 break; 487 case 'm': 488 minfreq = atoi(optarg); 489 if (minfreq < 0) { 490 warnx("%d is not a valid CPU frequency", 491 minfreq); 492 usage(); 493 } 494 break; 495 case 'M': 496 maxfreq = atoi(optarg); 497 if (maxfreq < 0) { 498 warnx("%d is not a valid CPU frequency", 499 maxfreq); 500 usage(); 501 } 502 break; 503 case 'n': 504 parse_mode(optarg, &mode_none, ch); 505 break; 506 case 'p': 507 poll_ival = atoi(optarg); 508 if (poll_ival < 5) { 509 warnx("poll interval is in units of ms"); 510 usage(); 511 } 512 break; 513 case 'P': 514 pidfile = optarg; 515 break; 516 case 'r': 517 cpu_running_mark = atoi(optarg); 518 if (cpu_running_mark <= 0 || cpu_running_mark > 100) { 519 warnx("%d is not a valid percent", 520 cpu_running_mark); 521 usage(); 522 } 523 break; 524 case 'v': 525 vflag = 1; 526 break; 527 default: 528 usage(); 529 } 530 531 mode = mode_none; 532 533 /* Poll interval is in units of ms. */ 534 poll_ival *= 1000; 535 536 /* Look up various sysctl MIBs. */ 537 len = 2; 538 if (sysctlnametomib("kern.cp_times", cp_times_mib, &len)) 539 err(1, "lookup kern.cp_times"); 540 len = 4; 541 if (sysctlnametomib("dev.cpu.0.freq", freq_mib, &len)) 542 err(EX_UNAVAILABLE, "no cpufreq(4) support -- aborting"); 543 len = 4; 544 if (sysctlnametomib("dev.cpu.0.freq_levels", levels_mib, &len)) 545 err(1, "lookup freq_levels"); 546 547 /* Check if we can read the load and supported freqs. */ 548 if (read_usage_times(NULL)) 549 err(1, "read_usage_times"); 550 if (read_freqs(&numfreqs, &freqs, &mwatts, minfreq, maxfreq)) 551 err(1, "error reading supported CPU frequencies"); 552 if (numfreqs == 0) 553 errx(1, "no CPU frequencies in user-specified range"); 554 555 /* Run in the background unless in verbose mode. */ 556 if (!vflag) { 557 pid_t otherpid; 558 559 pfh = pidfile_open(pidfile, 0600, &otherpid); 560 if (pfh == NULL) { 561 if (errno == EEXIST) { 562 errx(1, "powerd already running, pid: %d", 563 otherpid); 564 } 565 warn("cannot open pid file"); 566 } 567 if (daemon(0, 0) != 0) { 568 warn("cannot enter daemon mode, exiting"); 569 pidfile_remove(pfh); 570 exit(EXIT_FAILURE); 571 572 } 573 pidfile_write(pfh); 574 } 575 576 /* Decide whether to use ACPI or APM to read the AC line status. */ 577 acline_init(); 578 579 /* 580 * Exit cleanly on signals. 581 */ 582 signal(SIGINT, handle_sigs); 583 signal(SIGTERM, handle_sigs); 584 585 freq = initfreq = curfreq = get_freq(); 586 i = get_freq_id(curfreq, freqs, numfreqs); 587 if (freq < 1) 588 freq = 1; 589 590 /* 591 * If we are in adaptive mode and the current frequency is outside the 592 * user-defined range, adjust it to be within the user-defined range. 593 */ 594 acline_read(); 595 if (acline_status > SRC_UNKNOWN) 596 errx(1, "invalid AC line status %d", acline_status); 597 if ((acline_status == SRC_AC && 598 (mode_ac == MODE_ADAPTIVE || mode_ac == MODE_HIADAPTIVE)) || 599 (acline_status == SRC_BATTERY && 600 (mode_battery == MODE_ADAPTIVE || mode_battery == MODE_HIADAPTIVE)) || 601 (acline_status == SRC_UNKNOWN && 602 (mode_none == MODE_ADAPTIVE || mode_none == MODE_HIADAPTIVE))) { 603 /* Read the current frequency. */ 604 len = sizeof(curfreq); 605 if (sysctl(freq_mib, 4, &curfreq, &len, NULL, 0) != 0) { 606 if (vflag) 607 warn("error reading current CPU frequency"); 608 } 609 if (curfreq < freqs[numfreqs - 1]) { 610 if (vflag) { 611 printf("CPU frequency is below user-defined " 612 "minimum; changing frequency to %d " 613 "MHz\n", freqs[numfreqs - 1]); 614 } 615 if (set_freq(freqs[numfreqs - 1]) != 0) { 616 warn("error setting CPU freq %d", 617 freqs[numfreqs - 1]); 618 } 619 } else if (curfreq > freqs[0]) { 620 if (vflag) { 621 printf("CPU frequency is above user-defined " 622 "maximum; changing frequency to %d " 623 "MHz\n", freqs[0]); 624 } 625 if (set_freq(freqs[0]) != 0) { 626 warn("error setting CPU freq %d", 627 freqs[0]); 628 } 629 } 630 } 631 632 idle = 0; 633 /* Main loop. */ 634 for (;;) { 635 FD_ZERO(&fdset); 636 if (devd_pipe >= 0) { 637 FD_SET(devd_pipe, &fdset); 638 nfds = devd_pipe + 1; 639 } else { 640 nfds = 0; 641 } 642 if (mode == MODE_HIADAPTIVE || idle < 120) 643 to = poll_ival; 644 else if (idle < 360) 645 to = poll_ival * 2; 646 else 647 to = poll_ival * 4; 648 timeout.tv_sec = to / 1000000; 649 timeout.tv_usec = to % 1000000; 650 select(nfds, &fdset, NULL, &fdset, &timeout); 651 652 /* If the user requested we quit, print some statistics. */ 653 if (exit_requested) { 654 if (vflag && mjoules_used != 0) 655 printf("total joules used: %u.%03u\n", 656 (u_int)(mjoules_used / 1000), 657 (int)mjoules_used % 1000); 658 break; 659 } 660 661 /* Read the current AC status and record the mode. */ 662 acline_read(); 663 switch (acline_status) { 664 case SRC_AC: 665 mode = mode_ac; 666 break; 667 case SRC_BATTERY: 668 mode = mode_battery; 669 break; 670 case SRC_UNKNOWN: 671 mode = mode_none; 672 break; 673 default: 674 errx(1, "invalid AC line status %d", acline_status); 675 } 676 677 /* Read the current frequency. */ 678 if (idle % 32 == 0) { 679 if ((curfreq = get_freq()) == 0) 680 continue; 681 i = get_freq_id(curfreq, freqs, numfreqs); 682 } 683 idle++; 684 if (vflag) { 685 /* Keep a sum of all power actually used. */ 686 if (mwatts[i] != -1) 687 mjoules_used += 688 (mwatts[i] * (poll_ival / 1000)) / 1000; 689 } 690 691 /* Always switch to the lowest frequency in min mode. */ 692 if (mode == MODE_MIN) { 693 freq = freqs[numfreqs - 1]; 694 if (curfreq != freq) { 695 if (vflag) { 696 printf("now operating on %s power; " 697 "changing frequency to %d MHz\n", 698 modes[acline_status], freq); 699 } 700 idle = 0; 701 if (set_freq(freq) != 0) { 702 warn("error setting CPU freq %d", 703 freq); 704 continue; 705 } 706 } 707 continue; 708 } 709 710 /* Always switch to the highest frequency in max mode. */ 711 if (mode == MODE_MAX) { 712 freq = freqs[0]; 713 if (curfreq != freq) { 714 if (vflag) { 715 printf("now operating on %s power; " 716 "changing frequency to %d MHz\n", 717 modes[acline_status], freq); 718 } 719 idle = 0; 720 if (set_freq(freq) != 0) { 721 warn("error setting CPU freq %d", 722 freq); 723 continue; 724 } 725 } 726 continue; 727 } 728 729 /* Adaptive mode; get the current CPU usage times. */ 730 if (read_usage_times(&load)) { 731 if (vflag) 732 warn("read_usage_times() failed"); 733 continue; 734 } 735 736 if (mode == MODE_ADAPTIVE) { 737 if (load > cpu_running_mark) { 738 if (load > 95 || load > cpu_running_mark * 2) 739 freq *= 2; 740 else 741 freq = freq * load / cpu_running_mark; 742 if (freq > freqs[0]) 743 freq = freqs[0]; 744 } else if (load < cpu_idle_mark && 745 curfreq * load < freqs[get_freq_id( 746 freq * 7 / 8, freqs, numfreqs)] * 747 cpu_running_mark) { 748 freq = freq * 7 / 8; 749 if (freq < freqs[numfreqs - 1]) 750 freq = freqs[numfreqs - 1]; 751 } 752 } else { /* MODE_HIADAPTIVE */ 753 if (load > cpu_running_mark / 2) { 754 if (load > 95 || load > cpu_running_mark) 755 freq *= 4; 756 else 757 freq = freq * load * 2 / cpu_running_mark; 758 if (freq > freqs[0] * 2) 759 freq = freqs[0] * 2; 760 } else if (load < cpu_idle_mark / 2 && 761 curfreq * load < freqs[get_freq_id( 762 freq * 31 / 32, freqs, numfreqs)] * 763 cpu_running_mark / 2) { 764 freq = freq * 31 / 32; 765 if (freq < freqs[numfreqs - 1]) 766 freq = freqs[numfreqs - 1]; 767 } 768 } 769 if (vflag) { 770 printf("load %3d%%, current freq %4d MHz (%2d), wanted freq %4d MHz\n", 771 load, curfreq, i, freq); 772 } 773 j = get_freq_id(freq, freqs, numfreqs); 774 if (i != j) { 775 if (vflag) { 776 printf("changing clock" 777 " speed from %d MHz to %d MHz\n", 778 freqs[i], freqs[j]); 779 } 780 idle = 0; 781 if (set_freq(freqs[j])) 782 warn("error setting CPU frequency %d", 783 freqs[j]); 784 } 785 } 786 if (set_freq(initfreq)) 787 warn("error setting CPU frequency %d", initfreq); 788 free(freqs); 789 free(mwatts); 790 devd_close(); 791 if (!vflag) 792 pidfile_remove(pfh); 793 794 exit(0); 795 } 796