6db2453429
platforms, move the test for i386 from the Makefile to powerd.c. The powerpc specific checks are already done this way...
707 lines
16 KiB
C
707 lines
16 KiB
C
/*-
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* Copyright (c) 2004 Colin Percival
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* Copyright (c) 2005 Nate Lawson
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted providing that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/ioctl.h>
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#include <sys/sysctl.h>
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#include <sys/resource.h>
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#include <sys/socket.h>
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#include <sys/time.h>
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#include <sys/un.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <libutil.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#ifdef __i386__
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#define USE_APM
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#endif
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#ifdef USE_APM
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#include <machine/apm_bios.h>
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#endif
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#define DEFAULT_ACTIVE_PERCENT 75
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#define DEFAULT_IDLE_PERCENT 50
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#define DEFAULT_POLL_INTERVAL 250 /* Poll interval in milliseconds */
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typedef enum {
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MODE_MIN,
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MODE_ADAPTIVE,
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MODE_HIADAPTIVE,
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MODE_MAX,
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} modes_t;
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typedef enum {
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SRC_AC,
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SRC_BATTERY,
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SRC_UNKNOWN,
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} power_src_t;
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const char *modes[] = {
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"AC",
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"battery",
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"unknown"
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};
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#define ACPIAC "hw.acpi.acline"
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#define PMUAC "dev.pmu.0.acline"
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#define APMDEV "/dev/apm"
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#define DEVDPIPE "/var/run/devd.pipe"
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#define DEVCTL_MAXBUF 1024
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static int read_usage_times(int *load);
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static int read_freqs(int *numfreqs, int **freqs, int **power);
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static int set_freq(int freq);
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static void acline_init(void);
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static void acline_read(void);
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static int devd_init(void);
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static void devd_close(void);
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static void handle_sigs(int sig);
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static void parse_mode(char *arg, int *mode, int ch);
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static void usage(void);
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/* Sysctl data structures. */
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static int cp_times_mib[2];
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static int freq_mib[4];
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static int levels_mib[4];
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static int acline_mib[4];
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static size_t acline_mib_len;
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/* Configuration */
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static int cpu_running_mark;
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static int cpu_idle_mark;
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static int poll_ival;
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static int vflag;
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static volatile sig_atomic_t exit_requested;
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static power_src_t acline_status;
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static enum {
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ac_none,
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ac_sysctl,
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ac_acpi_devd,
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#ifdef USE_APM
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ac_apm,
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#endif
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} acline_mode;
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#ifdef USE_APM
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static int apm_fd = -1;
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#endif
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static int devd_pipe = -1;
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#define DEVD_RETRY_INTERVAL 60 /* seconds */
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static struct timeval tried_devd;
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static int
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read_usage_times(int *load)
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{
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static long *cp_times = NULL, *cp_times_old = NULL;
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static int ncpus = 0;
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size_t cp_times_len;
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int error, cpu, i, total;
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if (cp_times == NULL) {
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cp_times_len = 0;
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error = sysctl(cp_times_mib, 2, NULL, &cp_times_len, NULL, 0);
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if (error)
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return (error);
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if ((cp_times = malloc(cp_times_len)) == NULL)
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return (errno);
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if ((cp_times_old = malloc(cp_times_len)) == NULL) {
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free(cp_times);
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cp_times = NULL;
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return (errno);
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}
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ncpus = cp_times_len / (sizeof(long) * CPUSTATES);
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}
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cp_times_len = sizeof(long) * CPUSTATES * ncpus;
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error = sysctl(cp_times_mib, 2, cp_times, &cp_times_len, NULL, 0);
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if (error)
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return (error);
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if (load) {
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*load = 0;
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for (cpu = 0; cpu < ncpus; cpu++) {
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total = 0;
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for (i = 0; i < CPUSTATES; i++) {
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total += cp_times[cpu * CPUSTATES + i] -
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cp_times_old[cpu * CPUSTATES + i];
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}
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if (total == 0)
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continue;
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*load += 100 - (cp_times[cpu * CPUSTATES + CP_IDLE] -
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cp_times_old[cpu * CPUSTATES + CP_IDLE]) * 100 / total;
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}
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}
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memcpy(cp_times_old, cp_times, cp_times_len);
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return (0);
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}
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static int
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read_freqs(int *numfreqs, int **freqs, int **power)
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{
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char *freqstr, *p, *q;
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int i;
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size_t len = 0;
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if (sysctl(levels_mib, 4, NULL, &len, NULL, 0))
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return (-1);
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if ((freqstr = malloc(len)) == NULL)
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return (-1);
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if (sysctl(levels_mib, 4, freqstr, &len, NULL, 0))
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return (-1);
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*numfreqs = 1;
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for (p = freqstr; *p != '\0'; p++)
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if (*p == ' ')
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(*numfreqs)++;
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if ((*freqs = malloc(*numfreqs * sizeof(int))) == NULL) {
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free(freqstr);
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return (-1);
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}
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if ((*power = malloc(*numfreqs * sizeof(int))) == NULL) {
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free(freqstr);
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free(*freqs);
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return (-1);
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}
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for (i = 0, p = freqstr; i < *numfreqs; i++) {
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q = strchr(p, ' ');
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if (q != NULL)
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*q = '\0';
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if (sscanf(p, "%d/%d", &(*freqs)[i], &(*power)[i]) != 2) {
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free(freqstr);
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free(*freqs);
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free(*power);
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return (-1);
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}
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p = q + 1;
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}
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free(freqstr);
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return (0);
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}
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static int
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get_freq(void)
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{
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size_t len;
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int curfreq;
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len = sizeof(curfreq);
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if (sysctl(freq_mib, 4, &curfreq, &len, NULL, 0) != 0) {
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if (vflag)
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warn("error reading current CPU frequency");
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curfreq = 0;
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}
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return (curfreq);
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}
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static int
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set_freq(int freq)
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{
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if (sysctl(freq_mib, 4, NULL, NULL, &freq, sizeof(freq))) {
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if (errno != EPERM)
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return (-1);
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}
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return (0);
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}
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static int
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get_freq_id(int freq, int *freqs, int numfreqs)
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{
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int i = 1;
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while (i < numfreqs) {
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if (freqs[i] < freq)
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break;
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i++;
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}
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return (i - 1);
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}
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/*
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* Try to use ACPI to find the AC line status. If this fails, fall back
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* to APM. If nothing succeeds, we'll just run in default mode.
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*/
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static void
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acline_init(void)
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{
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acline_mib_len = 4;
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if (sysctlnametomib(ACPIAC, acline_mib, &acline_mib_len) == 0) {
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acline_mode = ac_sysctl;
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if (vflag)
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warnx("using sysctl for AC line status");
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#if __powerpc__
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} else if (sysctlnametomib(PMUAC, acline_mib, &acline_mib_len) == 0) {
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acline_mode = ac_sysctl;
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if (vflag)
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warnx("using sysctl for AC line status");
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#endif
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#ifdef USE_APM
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} else if ((apm_fd = open(APMDEV, O_RDONLY)) >= 0) {
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if (vflag)
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warnx("using APM for AC line status");
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acline_mode = ac_apm;
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#endif
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} else {
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warnx("unable to determine AC line status");
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acline_mode = ac_none;
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}
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}
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static void
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acline_read(void)
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{
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if (acline_mode == ac_acpi_devd) {
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char buf[DEVCTL_MAXBUF], *ptr;
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ssize_t rlen;
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int notify;
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rlen = read(devd_pipe, buf, sizeof(buf));
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if (rlen == 0 || (rlen < 0 && errno != EWOULDBLOCK)) {
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if (vflag)
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warnx("lost devd connection, switching to sysctl");
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devd_close();
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acline_mode = ac_sysctl;
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/* FALLTHROUGH */
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}
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if (rlen > 0 &&
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(ptr = strstr(buf, "system=ACPI")) != NULL &&
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(ptr = strstr(ptr, "subsystem=ACAD")) != NULL &&
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(ptr = strstr(ptr, "notify=")) != NULL &&
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sscanf(ptr, "notify=%x", ¬ify) == 1)
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acline_status = (notify ? SRC_AC : SRC_BATTERY);
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}
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if (acline_mode == ac_sysctl) {
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int acline;
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size_t len;
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len = sizeof(acline);
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if (sysctl(acline_mib, acline_mib_len, &acline, &len,
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NULL, 0) == 0)
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acline_status = (acline ? SRC_AC : SRC_BATTERY);
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else
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acline_status = SRC_UNKNOWN;
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}
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#ifdef USE_APM
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if (acline_mode == ac_apm) {
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struct apm_info info;
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if (ioctl(apm_fd, APMIO_GETINFO, &info) == 0) {
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acline_status = (info.ai_acline ? SRC_AC : SRC_BATTERY);
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} else {
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close(apm_fd);
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apm_fd = -1;
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acline_mode = ac_none;
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acline_status = SRC_UNKNOWN;
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}
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}
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#endif
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/* try to (re)connect to devd */
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if (acline_mode == ac_sysctl) {
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struct timeval now;
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gettimeofday(&now, NULL);
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if (now.tv_sec > tried_devd.tv_sec + DEVD_RETRY_INTERVAL) {
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if (devd_init() >= 0) {
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if (vflag)
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warnx("using devd for AC line status");
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acline_mode = ac_acpi_devd;
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}
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tried_devd = now;
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}
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}
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}
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static int
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devd_init(void)
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{
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struct sockaddr_un devd_addr;
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bzero(&devd_addr, sizeof(devd_addr));
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if ((devd_pipe = socket(PF_LOCAL, SOCK_STREAM, 0)) < 0) {
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if (vflag)
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warn("%s(): socket()", __func__);
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return (-1);
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}
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devd_addr.sun_family = PF_LOCAL;
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strlcpy(devd_addr.sun_path, DEVDPIPE, sizeof(devd_addr.sun_path));
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if (connect(devd_pipe, (struct sockaddr *)&devd_addr,
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sizeof(devd_addr)) == -1) {
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if (vflag)
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warn("%s(): connect()", __func__);
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close(devd_pipe);
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devd_pipe = -1;
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return (-1);
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}
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if (fcntl(devd_pipe, F_SETFL, O_NONBLOCK) == -1) {
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if (vflag)
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warn("%s(): fcntl()", __func__);
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close(devd_pipe);
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return (-1);
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}
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return (devd_pipe);
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}
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static void
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devd_close(void)
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{
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close(devd_pipe);
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devd_pipe = -1;
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}
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static void
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parse_mode(char *arg, int *mode, int ch)
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{
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if (strcmp(arg, "minimum") == 0 || strcmp(arg, "min") == 0)
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*mode = MODE_MIN;
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else if (strcmp(arg, "maximum") == 0 || strcmp(arg, "max") == 0)
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*mode = MODE_MAX;
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else if (strcmp(arg, "adaptive") == 0 || strcmp(arg, "adp") == 0)
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*mode = MODE_ADAPTIVE;
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else if (strcmp(arg, "hiadaptive") == 0 || strcmp(arg, "hadp") == 0)
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*mode = MODE_HIADAPTIVE;
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else
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errx(1, "bad option: -%c %s", (char)ch, optarg);
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}
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static void
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handle_sigs(int __unused sig)
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{
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exit_requested = 1;
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}
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static void
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usage(void)
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{
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fprintf(stderr,
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"usage: powerd [-v] [-a mode] [-b mode] [-i %%] [-n mode] [-p ival] [-r %%] [-P pidfile]\n");
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exit(1);
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}
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int
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main(int argc, char * argv[])
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{
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struct timeval timeout;
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fd_set fdset;
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int nfds;
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struct pidfh *pfh = NULL;
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const char *pidfile = NULL;
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int freq, curfreq, initfreq, *freqs, i, j, *mwatts, numfreqs, load;
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int ch, mode, mode_ac, mode_battery, mode_none;
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uint64_t mjoules_used;
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size_t len;
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/* Default mode for all AC states is adaptive. */
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mode_ac = mode_none = MODE_HIADAPTIVE;
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mode_battery = MODE_ADAPTIVE;
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cpu_running_mark = DEFAULT_ACTIVE_PERCENT;
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cpu_idle_mark = DEFAULT_IDLE_PERCENT;
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poll_ival = DEFAULT_POLL_INTERVAL;
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mjoules_used = 0;
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vflag = 0;
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/* User must be root to control frequencies. */
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if (geteuid() != 0)
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errx(1, "must be root to run");
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while ((ch = getopt(argc, argv, "a:b:i:n:p:P:r:v")) != -1)
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switch (ch) {
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case 'a':
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parse_mode(optarg, &mode_ac, ch);
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break;
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case 'b':
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parse_mode(optarg, &mode_battery, ch);
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break;
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case 'i':
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cpu_idle_mark = atoi(optarg);
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if (cpu_idle_mark < 0 || cpu_idle_mark > 100) {
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warnx("%d is not a valid percent",
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cpu_idle_mark);
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usage();
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}
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break;
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case 'n':
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parse_mode(optarg, &mode_none, ch);
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break;
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case 'p':
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poll_ival = atoi(optarg);
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if (poll_ival < 5) {
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warnx("poll interval is in units of ms");
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usage();
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}
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break;
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case 'P':
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pidfile = optarg;
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break;
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case 'r':
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cpu_running_mark = atoi(optarg);
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if (cpu_running_mark <= 0 || cpu_running_mark > 100) {
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warnx("%d is not a valid percent",
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cpu_running_mark);
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usage();
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}
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break;
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case 'v':
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vflag = 1;
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break;
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default:
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usage();
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}
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mode = mode_none;
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/* Poll interval is in units of ms. */
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poll_ival *= 1000;
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/* Look up various sysctl MIBs. */
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len = 2;
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if (sysctlnametomib("kern.cp_times", cp_times_mib, &len))
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err(1, "lookup kern.cp_times");
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len = 4;
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if (sysctlnametomib("dev.cpu.0.freq", freq_mib, &len))
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err(1, "lookup freq");
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len = 4;
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if (sysctlnametomib("dev.cpu.0.freq_levels", levels_mib, &len))
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err(1, "lookup freq_levels");
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/* Check if we can read the load and supported freqs. */
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if (read_usage_times(NULL))
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err(1, "read_usage_times");
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if (read_freqs(&numfreqs, &freqs, &mwatts))
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err(1, "error reading supported CPU frequencies");
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/* Run in the background unless in verbose mode. */
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if (!vflag) {
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pid_t otherpid;
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pfh = pidfile_open(pidfile, 0600, &otherpid);
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if (pfh == NULL) {
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if (errno == EEXIST) {
|
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errx(1, "powerd already running, pid: %d",
|
|
otherpid);
|
|
}
|
|
warn("cannot open pid file");
|
|
}
|
|
if (daemon(0, 0) != 0) {
|
|
warn("cannot enter daemon mode, exiting");
|
|
pidfile_remove(pfh);
|
|
exit(EXIT_FAILURE);
|
|
|
|
}
|
|
pidfile_write(pfh);
|
|
}
|
|
|
|
/* Decide whether to use ACPI or APM to read the AC line status. */
|
|
acline_init();
|
|
|
|
/*
|
|
* Exit cleanly on signals.
|
|
*/
|
|
signal(SIGINT, handle_sigs);
|
|
signal(SIGTERM, handle_sigs);
|
|
|
|
freq = initfreq = get_freq();
|
|
if (freq < 1)
|
|
freq = 1;
|
|
/* Main loop. */
|
|
for (;;) {
|
|
FD_ZERO(&fdset);
|
|
if (devd_pipe >= 0) {
|
|
FD_SET(devd_pipe, &fdset);
|
|
nfds = devd_pipe + 1;
|
|
} else {
|
|
nfds = 0;
|
|
}
|
|
timeout.tv_sec = poll_ival / 1000000;
|
|
timeout.tv_usec = poll_ival % 1000000;
|
|
select(nfds, &fdset, NULL, &fdset, &timeout);
|
|
|
|
/* 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_read();
|
|
switch (acline_status) {
|
|
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_status);
|
|
}
|
|
|
|
/* Read the current frequency. */
|
|
if ((curfreq = get_freq()) == 0)
|
|
continue;
|
|
|
|
i = get_freq_id(curfreq, freqs, numfreqs);
|
|
|
|
if (vflag) {
|
|
/* Keep a sum of all power actually used. */
|
|
if (mwatts[i] != -1)
|
|
mjoules_used +=
|
|
(mwatts[i] * (poll_ival / 1000)) / 1000;
|
|
}
|
|
|
|
/* Always switch to the lowest frequency in min mode. */
|
|
if (mode == MODE_MIN) {
|
|
freq = freqs[numfreqs - 1];
|
|
if (curfreq != freq) {
|
|
if (vflag) {
|
|
printf("now operating on %s power; "
|
|
"changing frequency to %d MHz\n",
|
|
modes[acline_status], freq);
|
|
}
|
|
if (set_freq(freq) != 0) {
|
|
warn("error setting CPU freq %d",
|
|
freq);
|
|
continue;
|
|
}
|
|
}
|
|
continue;
|
|
}
|
|
|
|
/* Always switch to the highest frequency in max mode. */
|
|
if (mode == MODE_MAX) {
|
|
freq = freqs[0];
|
|
if (curfreq != freq) {
|
|
if (vflag) {
|
|
printf("now operating on %s power; "
|
|
"changing frequency to %d MHz\n",
|
|
modes[acline_status], freq);
|
|
}
|
|
if (set_freq(freq) != 0) {
|
|
warn("error setting CPU freq %d",
|
|
freq);
|
|
continue;
|
|
}
|
|
}
|
|
continue;
|
|
}
|
|
|
|
/* Adaptive mode; get the current CPU usage times. */
|
|
if (read_usage_times(&load)) {
|
|
if (vflag)
|
|
warn("read_usage_times() failed");
|
|
continue;
|
|
}
|
|
|
|
if (mode == MODE_ADAPTIVE) {
|
|
if (load > cpu_running_mark) {
|
|
if (load > 95 || load > cpu_running_mark * 2)
|
|
freq *= 2;
|
|
else
|
|
freq = freq * load / cpu_running_mark;
|
|
if (freq > freqs[0])
|
|
freq = freqs[0];
|
|
} else if (load < cpu_idle_mark &&
|
|
curfreq * load < freqs[get_freq_id(
|
|
freq * 7 / 8, freqs, numfreqs)] *
|
|
cpu_running_mark) {
|
|
freq = freq * 7 / 8;
|
|
if (freq < freqs[numfreqs - 1])
|
|
freq = freqs[numfreqs - 1];
|
|
}
|
|
} else { /* MODE_HIADAPTIVE */
|
|
if (load > cpu_running_mark / 2) {
|
|
if (load > 95 || load > cpu_running_mark)
|
|
freq *= 4;
|
|
else
|
|
freq = freq * load * 2 / cpu_running_mark;
|
|
if (freq > freqs[0] * 2)
|
|
freq = freqs[0] * 2;
|
|
} else if (load < cpu_idle_mark / 2 &&
|
|
curfreq * load < freqs[get_freq_id(
|
|
freq * 31 / 32, freqs, numfreqs)] *
|
|
cpu_running_mark / 2) {
|
|
freq = freq * 31 / 32;
|
|
if (freq < freqs[numfreqs - 1])
|
|
freq = freqs[numfreqs - 1];
|
|
}
|
|
}
|
|
if (vflag) {
|
|
printf("load %3d%%, current freq %4d MHz (%2d), wanted freq %4d MHz\n",
|
|
load, curfreq, i, freq);
|
|
}
|
|
j = get_freq_id(freq, freqs, numfreqs);
|
|
if (i != j) {
|
|
if (vflag) {
|
|
printf("changing clock"
|
|
" speed from %d MHz to %d MHz\n",
|
|
freqs[i], freqs[j]);
|
|
}
|
|
if (set_freq(freqs[j]))
|
|
warn("error setting CPU frequency %d",
|
|
freqs[j]);
|
|
}
|
|
}
|
|
if (set_freq(initfreq))
|
|
warn("error setting CPU frequency %d", initfreq);
|
|
free(freqs);
|
|
free(mwatts);
|
|
devd_close();
|
|
if (!vflag)
|
|
pidfile_remove(pfh);
|
|
|
|
exit(0);
|
|
}
|