diff options
| -rw-r--r-- | usr.sbin/powerd/powerd.8 | 21 | ||||
| -rw-r--r-- | usr.sbin/powerd/powerd.c | 222 |
2 files changed, 154 insertions, 89 deletions
diff --git a/usr.sbin/powerd/powerd.8 b/usr.sbin/powerd/powerd.8 index 8ca5e0c..b104383 100644 --- a/usr.sbin/powerd/powerd.8 +++ b/usr.sbin/powerd/powerd.8 @@ -47,7 +47,8 @@ utility monitors the system state and sets various power control options accordingly. It offers three modes (maximum, minimum, and adaptive) that can be individually selected while on AC power or batteries. -The modes maximum, minimum, and adaptive may be abbreviated max, min, adp. +The modes maximum, minimum, adaptive and hiadaptive may be abbreviated +max, min, adp, hadp. .Pp Maximum mode chooses the highest performance values. Minimum mode selects the lowest performance values to get the most power @@ -56,8 +57,10 @@ 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. +Hiadaptive mode is alike adaptive mode, but tuned for systems where +performance and interactivity are more important then power consumption. +It rises frequency faster, drops slower and keeps twice lower CPU load. +The default mode is adaptive for battery power and hiadaptive for the rest. .Pp The .Nm @@ -72,10 +75,9 @@ Selects the .Ar mode to use while on battery power. .It Fl i Ar percent -Specifies the CPU idle percent level when -adaptive +Specifies the CPU load percent level when adaptive mode should begin to degrade performance to save power. -The default is 90% or higher. +The default is 50% or lower. .It Fl n Ar mode Selects the .Ar mode @@ -83,16 +85,15 @@ 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. +The default is 250 ms. .It Fl P Ar pidfile Specifies an alternative file in which the process ID should be stored. The default is .Pa /var/run/powerd.pid . .It Fl r Ar percent -Specifies the CPU idle percent level where -adaptive +Specifies the CPU load percent level where adaptive mode should consider the CPU running and increase performance. -The default is 65% or lower. +The default is 75% or higther. .It Fl v Verbose mode. Messages about power changes will be printed to stdout and diff --git a/usr.sbin/powerd/powerd.c b/usr.sbin/powerd/powerd.c index 8ecff23..23354b9 100644 --- a/usr.sbin/powerd/powerd.c +++ b/usr.sbin/powerd/powerd.c @@ -50,13 +50,14 @@ __FBSDID("$FreeBSD$"); #include <machine/apm_bios.h> #endif -#define DEFAULT_ACTIVE_PERCENT 65 -#define DEFAULT_IDLE_PERCENT 90 -#define DEFAULT_POLL_INTERVAL 500 /* Poll interval in milliseconds */ +#define DEFAULT_ACTIVE_PERCENT 75 +#define DEFAULT_IDLE_PERCENT 50 +#define DEFAULT_POLL_INTERVAL 250 /* Poll interval in milliseconds */ typedef enum { MODE_MIN, MODE_ADAPTIVE, + MODE_HIADAPTIVE, MODE_MAX, } modes_t; @@ -77,7 +78,7 @@ const char *modes[] = { #define DEVDPIPE "/var/run/devd.pipe" #define DEVCTL_MAXBUF 1024 -static int read_usage_times(long *idle, long *total); +static int read_usage_times(int *load); static int read_freqs(int *numfreqs, int **freqs, int **power); static int set_freq(int freq); static void acline_init(void); @@ -89,7 +90,7 @@ 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 cp_times_mib[2]; static int freq_mib[4]; static int levels_mib[4]; static int acline_mib[3]; @@ -119,27 +120,49 @@ static int devd_pipe = -1; static struct timeval tried_devd; static int -read_usage_times(long *idle, long *total) +read_usage_times(int *load) { - static long idle_old, total_old; - long cp_time[CPUSTATES], i, total_new; - size_t cp_time_len; - int error; + static long *cp_times = NULL, *cp_times_old = NULL; + static int ncpus = 0; + size_t cp_times_len; + int error, cpu, i, total; + + if (cp_times == NULL) { + cp_times_len = 0; + error = sysctl(cp_times_mib, 2, NULL, &cp_times_len, NULL, 0); + if (error) + return (error); + if ((cp_times = malloc(cp_times_len)) == NULL) + return (errno); + if ((cp_times_old = malloc(cp_times_len)) == NULL) { + free(cp_times); + cp_times = NULL; + return (errno); + } + ncpus = cp_times_len / (sizeof(long) * CPUSTATES); + } - cp_time_len = sizeof(cp_time); - error = sysctl(cp_time_mib, 2, cp_time, &cp_time_len, NULL, 0); + cp_times_len = sizeof(long) * CPUSTATES * ncpus; + error = sysctl(cp_times_mib, 2, cp_times, &cp_times_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; + + if (load) { + *load = 0; + for (cpu = 0; cpu < ncpus; cpu++) { + total = 0; + for (i = 0; i < CPUSTATES; i++) { + total += cp_times[cpu * CPUSTATES + i] - + cp_times_old[cpu * CPUSTATES + i]; + } + if (total == 0) + continue; + *load += 100 - (cp_times[cpu * CPUSTATES + CP_IDLE] - + cp_times_old[cpu * CPUSTATES + CP_IDLE]) * 100 / total; + } + } - idle_old = cp_time[CP_IDLE]; - total_old = total_new; + memcpy(cp_times_old, cp_times, cp_times_len); return (0); } @@ -190,6 +213,21 @@ read_freqs(int *numfreqs, int **freqs, int **power) } static int +get_freq(void) +{ + size_t len; + int curfreq; + + len = sizeof(curfreq); + if (sysctl(freq_mib, 4, &curfreq, &len, NULL, 0) != 0) { + if (vflag) + warn("error reading current CPU frequency"); + curfreq = 0; + } + return (curfreq); +} + +static int set_freq(int freq) { @@ -201,6 +239,19 @@ set_freq(int freq) return (0); } +static int +get_freq_id(int freq, int *freqs, int numfreqs) +{ + int i = 1; + + while (i < numfreqs) { + if (freqs[i] < freq) + break; + i++; + } + return (i - 1); +} + /* * 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. @@ -341,6 +392,8 @@ parse_mode(char *arg, int *mode, int ch) *mode = MODE_MAX; else if (strcmp(arg, "adaptive") == 0 || strcmp(arg, "adp") == 0) *mode = MODE_ADAPTIVE; + else if (strcmp(arg, "hiadaptive") == 0 || strcmp(arg, "hadp") == 0) + *mode = MODE_HIADAPTIVE; else errx(1, "bad option: -%c %s", (char)ch, optarg); } @@ -369,14 +422,14 @@ main(int argc, char * argv[]) int nfds; struct pidfh *pfh = NULL; const char *pidfile = NULL; - long idle, total; - int curfreq, *freqs, i, *mwatts, numfreqs; + int freq, curfreq, *freqs, i, j, *mwatts, numfreqs, load; int ch, mode, mode_ac, mode_battery, mode_none; uint64_t mjoules_used; size_t len; /* Default mode for all AC states is adaptive. */ - mode_ac = mode_battery = mode_none = MODE_ADAPTIVE; + mode_ac = mode_none = MODE_HIADAPTIVE; + mode_battery = MODE_ADAPTIVE; cpu_running_mark = DEFAULT_ACTIVE_PERCENT; cpu_idle_mark = DEFAULT_IDLE_PERCENT; poll_ival = DEFAULT_POLL_INTERVAL; @@ -418,7 +471,7 @@ main(int argc, char * argv[]) break; case 'r': cpu_running_mark = atoi(optarg); - if (cpu_running_mark < 0 || cpu_running_mark > 100) { + if (cpu_running_mark <= 0 || cpu_running_mark > 100) { warnx("%d is not a valid percent", cpu_running_mark); usage(); @@ -438,8 +491,8 @@ main(int argc, char * argv[]) /* Look up various sysctl MIBs. */ len = 2; - if (sysctlnametomib("kern.cp_time", cp_time_mib, &len)) - err(1, "lookup kern.cp_time"); + if (sysctlnametomib("kern.cp_times", cp_times_mib, &len)) + err(1, "lookup kern.cp_times"); len = 4; if (sysctlnametomib("dev.cpu.0.freq", freq_mib, &len)) err(1, "lookup freq"); @@ -447,8 +500,8 @@ main(int argc, char * argv[]) 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)) + /* Check if we can read the load and supported freqs. */ + if (read_usage_times(NULL)) err(1, "read_usage_times"); if (read_freqs(&numfreqs, &freqs, &mwatts)) err(1, "error reading supported CPU frequencies"); @@ -483,6 +536,9 @@ main(int argc, char * argv[]) signal(SIGINT, handle_sigs); signal(SIGTERM, handle_sigs); + freq = get_freq(); + if (freq < 1) + freq = 1; /* Main loop. */ for (;;) { FD_ZERO(&fdset); @@ -522,37 +578,30 @@ main(int argc, char * argv[]) } /* Read the current frequency. */ - len = sizeof(curfreq); - if (sysctl(freq_mib, 4, &curfreq, &len, NULL, 0) != 0) { - if (vflag) - warn("error reading current CPU frequency"); + if ((curfreq = get_freq()) == 0) continue; - } + i = get_freq_id(curfreq, freqs, numfreqs); + 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) + 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) { - if (curfreq != freqs[numfreqs - 1]) { + freq = freqs[numfreqs - 1]; + if (curfreq != freq) { if (vflag) { printf("now operating on %s power; " "changing frequency to %d MHz\n", - modes[acline_status], - freqs[numfreqs - 1]); + modes[acline_status], freq); } - if (set_freq(freqs[numfreqs - 1]) != 0) { + if (set_freq(freq) != 0) { warn("error setting CPU freq %d", - freqs[numfreqs - 1]); + freq); continue; } } @@ -561,16 +610,16 @@ main(int argc, char * argv[]) /* Always switch to the highest frequency in max mode. */ if (mode == MODE_MAX) { - if (curfreq != freqs[0]) { + freq = freqs[0]; + if (curfreq != freq) { if (vflag) { printf("now operating on %s power; " "changing frequency to %d MHz\n", - modes[acline_status], - freqs[0]); + modes[acline_status], freq); } - if (set_freq(freqs[0]) != 0) { + if (set_freq(freq) != 0) { warn("error setting CPU freq %d", - freqs[0]); + freq); continue; } } @@ -578,44 +627,59 @@ main(int argc, char * argv[]) } /* Adaptive mode; get the current CPU usage times. */ - if (read_usage_times(&idle, &total)) { + if (read_usage_times(&load)) { if (vflag) warn("read_usage_times() failed"); continue; } - - /* - * 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 (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]; } - if (set_freq(freqs[i])) - warn("error setting CPU frequency %d", - freqs[i]); - } else if (idle > (total * cpu_idle_mark) / 100 && - curfreq > freqs[numfreqs - 1]) { - i++; + } 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("idle time > %d%%, decreasing clock" + printf("changing clock" " speed from %d MHz to %d MHz\n", - cpu_idle_mark, curfreq, freqs[i]); + freqs[i], freqs[j]); } - if (set_freq(freqs[i]) != 0) + if (set_freq(freqs[j])) warn("error setting CPU frequency %d", - freqs[i]); + freqs[j]); } } free(freqs); |
