Index: head/usr.sbin/powerd/Makefile =================================================================== --- head/usr.sbin/powerd/Makefile (revision 149427) +++ head/usr.sbin/powerd/Makefile (revision 149428) @@ -1,7 +1,10 @@ # $FreeBSD$ PROG= powerd MAN= powerd.8 WARNS?= 6 +DPADD= ${LIBUTIL} +LDADD= -lutil + .include Index: head/usr.sbin/powerd/powerd.8 =================================================================== --- head/usr.sbin/powerd/powerd.8 (revision 149427) +++ head/usr.sbin/powerd/powerd.8 (revision 149428) @@ -1,133 +1,138 @@ .\" Copyright (c) 2005 Nate Lawson .\" All rights reserved. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" .\" $FreeBSD$ .\" .Dd April 10, 2005 .Dt POWERD 8 .Os .Sh NAME .Nm powerd .Nd "system power control utility" .Sh SYNOPSIS .Nm .Op Fl a Ar mode .Op Fl b Ar mode .Op Fl i Ar percent .Op Fl n Ar mode .Op Fl p Ar ival +.Op Fl P Ar pidfile .Op Fl r Ar percent .Op Fl v .Sh DESCRIPTION The .Nm utility monitors the system state and sets various power control options accordingly. It offers three modes (max, min, and adaptive) that can be individually selected while on AC power or batteries. .Pp Maximum mode chooses the highest performance values. Minimum mode selects the lowest performance values to get the most power savings. Adaptive mode attempts to strike a balance by degrading performance when the system appears idle and increasing it when the system is busy. It offers a good balance between a small performance loss for greatly increased power savings. The default mode is adaptive. .Pp The .Nm utility recognizes the following runtime options: .Bl -tag -width ".Fl r Ar percent" .It Fl a Ar mode Selects the .Ar mode to use while on AC power. .It Fl b Ar mode Selects the .Ar mode to use while on battery power. .It Fl i Ar percent Specifies the CPU idle percent level when adaptive mode should begin to degrade performance to save power. The default is 90% or higher. .It Fl n Ar mode Selects the .Ar mode to use normally when the AC line state is unknown. .It Fl p Ar ival Specifies a different polling interval (in milliseconds) for AC line state and system idle levels. The default is 500 ms. +.It Fl P +Specify an alternative file in which to store the process ID. +The default is +.Pa /var/run/powerd.pid . .It Fl r Ar percent Specifies the CPU idle percent level where adaptive mode should consider the CPU running and increase performance. The default is 65% or lower. .It Fl v Verbose mode. Messages about power changes will be printed to stdout and .Nm will operate in the foreground. .El .Sh SEE ALSO .Xr acpi 4 , .Xr apm 4 , .Xr cpufreq 4 .Sh HISTORY The .Nm utility first appeared in .Fx 5.5 . .Sh AUTHORS .An -nosplit .An Colin Percival first wrote .Nm estctrl , the utility that .Nm is based on. .An Nate Lawson then updated it for .Xr cpufreq 4 , added features, and wrote this manual page. .Sh BUGS The .Nm utility should also power down idle disks and other components besides the CPU. .Pp If .Nm is used with .Pa power_profile , they may override each other. .Pp The .Nm utility should probably use the .Xr devctl 4 interface instead of polling for AC line state. Index: head/usr.sbin/powerd/powerd.c =================================================================== --- head/usr.sbin/powerd/powerd.c (revision 149427) +++ head/usr.sbin/powerd/powerd.c (revision 149428) @@ -1,465 +1,486 @@ /*- * Copyright (c) 2004 Colin Percival * Copyright (c) 2005 Nate Lawson * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted providing that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include __FBSDID("$FreeBSD$"); +#include +#include +#include +#include + #include #include #include +#include #include #include #include #include #include #ifdef __i386__ #include #endif -#include -#include -#include - #define DEFAULT_ACTIVE_PERCENT 65 #define DEFAULT_IDLE_PERCENT 90 #define DEFAULT_POLL_INTERVAL 500 /* Poll interval in milliseconds */ enum modes_t { MODE_MIN, MODE_ADAPTIVE, MODE_MAX, }; enum power_src_t { SRC_AC, SRC_BATTERY, SRC_UNKNOWN, }; const char *modes[] = { "AC", "battery", "unknown" }; #define ACPIAC "hw.acpi.acline" #define APMDEV "/dev/apm" static int read_usage_times(long *idle, long *total); static int read_freqs(int *numfreqs, int **freqs, int **power); static int set_freq(int freq); static void acline_init(void); static int acline_read(void); static void handle_sigs(int sig); static void parse_mode(char *arg, int *mode, int ch); static void usage(void); /* Sysctl data structures. */ static int cp_time_mib[2]; static int freq_mib[4]; static int levels_mib[4]; static int acline_mib[3]; /* Configuration */ static int cpu_running_mark; static int cpu_idle_mark; static int poll_ival; static int apm_fd; static int exit_requested; static int read_usage_times(long *idle, long *total) { static long idle_old, total_old; long cp_time[CPUSTATES], i, total_new; size_t cp_time_len; int error; cp_time_len = sizeof(cp_time); error = sysctl(cp_time_mib, 2, cp_time, &cp_time_len, NULL, 0); if (error) return (error); for (total_new = 0, i = 0; i < CPUSTATES; i++) total_new += cp_time[i]; if (idle) *idle = cp_time[CP_IDLE] - idle_old; if (total) *total = total_new - total_old; idle_old = cp_time[CP_IDLE]; total_old = total_new; return (0); } static int read_freqs(int *numfreqs, int **freqs, int **power) { char *freqstr, *p, *q; int i; size_t len = 0; if (sysctl(levels_mib, 4, NULL, &len, NULL, 0)) return (-1); if ((freqstr = malloc(len)) == NULL) return (-1); if (sysctl(levels_mib, 4, freqstr, &len, NULL, 0)) return (-1); *numfreqs = 1; for (p = freqstr; *p != '\0'; p++) if (*p == ' ') (*numfreqs)++; if ((*freqs = malloc(*numfreqs * sizeof(int))) == NULL) { free(freqstr); return (-1); } if ((*power = malloc(*numfreqs * sizeof(int))) == NULL) { free(freqstr); free(*freqs); return (-1); } for (i = 0, p = freqstr; i < *numfreqs; i++) { q = strchr(p, ' '); if (q != NULL) *q = '\0'; if (sscanf(p, "%d/%d", &(*freqs)[i], &(*power)[i]) != 2) { free(freqstr); free(*freqs); free(*power); return (-1); } p = q + 1; } free(freqstr); return (0); } static int set_freq(int freq) { if (sysctl(freq_mib, 4, NULL, NULL, &freq, sizeof(freq))) { if (errno != EPERM) return (-1); } return (0); } /* * Try to use ACPI to find the AC line status. If this fails, fall back * to APM. If nothing succeeds, we'll just run in default mode. */ static void acline_init() { int acline; size_t len; apm_fd = -1; len = sizeof(acline); if (sysctlbyname(ACPIAC, &acline, &len, NULL, 0) == 0) { len = 3; if (sysctlnametomib(ACPIAC, acline_mib, &len)) err(1, "lookup acline"); } else { apm_fd = open(APMDEV, O_RDONLY); if (apm_fd == -1) warnx( "cannot read AC line status, using default settings"); } } static int acline_read() { int acline = SRC_UNKNOWN; size_t len; #ifdef __i386__ struct apm_info info; if (apm_fd != -1 && ioctl(apm_fd, APMIO_GETINFO, &info) == 0) acline = info.ai_acline ? SRC_AC : SRC_BATTERY; #endif if (acline == SRC_UNKNOWN) { len = sizeof(acline); if (sysctl(acline_mib, 3, &acline, &len, NULL, 0) == 0) acline = acline ? SRC_AC : SRC_BATTERY; } return (acline); } static void parse_mode(char *arg, int *mode, int ch) { if (strcmp(arg, "min") == 0) *mode = MODE_MIN; else if (strcmp(arg, "max") == 0) *mode = MODE_MAX; else if (strcmp(arg, "adaptive") == 0) *mode = MODE_ADAPTIVE; else errx(1, "bad option: -%c %s", (char)ch, optarg); } static void handle_sigs(int __unused sig) { exit_requested = 1; } static void usage(void) { fprintf(stderr, -"usage: powerd [-v] [-a mode] [-b mode] [-i %%] [-n mode] [-p ival] [-r %%]\n"); +"usage: powerd [-v] [-a mode] [-b mode] [-i %%] [-n mode] [-p ival] [-r %%] [-P pidfile]\n"); exit(1); } int main(int argc, char * argv[]) { + struct pidfh *pfh; + const char *pidfile = NULL; long idle, total; int curfreq, *freqs, i, *mwatts, numfreqs; int ch, mode_ac, mode_battery, mode_none, acline, mode, vflag; uint64_t mjoules_used; size_t len; /* Default mode for all AC states is adaptive. */ mode_ac = mode_battery = mode_none = MODE_ADAPTIVE; cpu_running_mark = DEFAULT_ACTIVE_PERCENT; cpu_idle_mark = DEFAULT_IDLE_PERCENT; poll_ival = DEFAULT_POLL_INTERVAL; mjoules_used = 0; vflag = 0; apm_fd = -1; /* User must be root to control frequencies. */ if (geteuid() != 0) errx(1, "must be root to run"); - while ((ch = getopt(argc, argv, "a:b:i:n:p:r:v")) != EOF) + while ((ch = getopt(argc, argv, "a:b:i:n:p:P:r:v")) != EOF) switch (ch) { case 'a': parse_mode(optarg, &mode_ac, ch); break; case 'b': parse_mode(optarg, &mode_battery, ch); break; case 'i': cpu_idle_mark = atoi(optarg); if (cpu_idle_mark < 0 || cpu_idle_mark > 100) { warnx("%d is not a valid percent", cpu_idle_mark); usage(); } break; case 'n': parse_mode(optarg, &mode_none, ch); break; case 'p': poll_ival = atoi(optarg); if (poll_ival < 5) { warnx("poll interval is in units of ms"); usage(); } break; + case 'P': + pidfile = optarg; + break; case 'r': cpu_running_mark = atoi(optarg); if (cpu_running_mark < 0 || cpu_running_mark > 100) { warnx("%d is not a valid percent", cpu_running_mark); usage(); } break; case 'v': vflag = 1; break; default: usage(); } /* Poll interval is in units of ms. */ poll_ival *= 1000; /* Look up various sysctl MIBs. */ len = 2; if (sysctlnametomib("kern.cp_time", cp_time_mib, &len)) err(1, "lookup kern.cp_time"); len = 4; if (sysctlnametomib("dev.cpu.0.freq", freq_mib, &len)) err(1, "lookup freq"); len = 4; if (sysctlnametomib("dev.cpu.0.freq_levels", levels_mib, &len)) err(1, "lookup freq_levels"); /* Check if we can read the idle time and supported freqs. */ if (read_usage_times(NULL, NULL)) err(1, "read_usage_times"); if (read_freqs(&numfreqs, &freqs, &mwatts)) err(1, "error reading supported CPU frequencies"); /* Decide whether to use ACPI or APM to read the AC line status. */ acline_init(); /* Run in the background unless in verbose mode. */ - if (!vflag) + if (!vflag) { + pid_t otherpid; + + pfh = pidfile_open(pidfile, 0600, &otherpid); + if (pfh == NULL) { + if (errno == EEXIST) { + errx(1, "powerd already running, pid: %d", + otherpid); + } + warn("cannot open pid file"); + } daemon(0, 0); + pidfile_write(pfh); + } signal(SIGINT, handle_sigs); signal(SIGTERM, handle_sigs); /* Main loop. */ for (;;) { /* Check status every few milliseconds. */ usleep(poll_ival); /* If the user requested we quit, print some statistics. */ if (exit_requested) { if (vflag && mjoules_used != 0) printf("total joules used: %u.%03u\n", (u_int)(mjoules_used / 1000), (int)mjoules_used % 1000); break; } /* Read the current AC status and record the mode. */ acline = acline_read(); switch (acline) { case SRC_AC: mode = mode_ac; break; case SRC_BATTERY: mode = mode_battery; break; case SRC_UNKNOWN: mode = mode_none; break; default: errx(1, "invalid AC line status %d", acline); } /* Read the current frequency. */ len = sizeof(curfreq); if (sysctl(freq_mib, 4, &curfreq, &len, NULL, 0)) err(1, "error reading current CPU frequency"); if (vflag) { for (i = 0; i < numfreqs; i++) { if (freqs[i] == curfreq) break; } /* Keep a sum of all power actually used. */ if (i < numfreqs && mwatts[i] != -1) mjoules_used += (mwatts[i] * (poll_ival / 1000)) / 1000; } /* Always switch to the lowest frequency in min mode. */ if (mode == MODE_MIN) { if (curfreq != freqs[numfreqs - 1]) { if (vflag) { printf("now operating on %s power; " "changing frequency to %d MHz\n", modes[acline], freqs[numfreqs - 1]); } if (set_freq(freqs[numfreqs - 1])) err(1, "error setting CPU freq %d", freqs[numfreqs - 1]); } continue; } /* Always switch to the highest frequency in max mode. */ if (mode == MODE_MAX) { if (curfreq != freqs[0]) { if (vflag) { printf("now operating on %s power; " "changing frequency to %d MHz\n", modes[acline], freqs[0]); } if (set_freq(freqs[0])) err(1, "error setting CPU freq %d", freqs[0]); } continue; } /* Adaptive mode; get the current CPU usage times. */ if (read_usage_times(&idle, &total)) err(1, "read_usage_times"); /* * If we're idle less than the active mark, bump up two levels. * If we're idle more than the idle mark, drop down one level. */ for (i = 0; i < numfreqs - 1; i++) { if (freqs[i] == curfreq) break; } if (idle < (total * cpu_running_mark) / 100 && curfreq < freqs[0]) { i -= 2; if (i < 0) i = 0; if (vflag) { printf("idle time < %d%%, increasing clock" " speed from %d MHz to %d MHz\n", cpu_running_mark, curfreq, freqs[i]); } if (set_freq(freqs[i])) err(1, "error setting CPU frequency %d", freqs[i]); } else if (idle > (total * cpu_idle_mark) / 100 && curfreq > freqs[numfreqs - 1]) { i++; if (vflag) { printf("idle time > %d%%, decreasing clock" " speed from %d MHz to %d MHz\n", cpu_idle_mark, curfreq, freqs[i]); } if (set_freq(freqs[i])) err(1, "error setting CPU frequency %d", freqs[i]); } } free(freqs); free(mwatts); + if (!vflag) + pidfile_remove(pfh); exit(0); }