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Diffstat (limited to 'src/measurement/measurement.cpp')
| -rw-r--r-- | src/measurement/measurement.cpp | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/src/measurement/measurement.cpp b/src/measurement/measurement.cpp new file mode 100644 index 0000000..caee24e --- /dev/null +++ b/src/measurement/measurement.cpp @@ -0,0 +1,188 @@ +/* + * Copyright 2010, Intel Corporation + * + * This file is part of PowerTOP + * + * This program file is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program in a file named COPYING; if not, write to the + * Free Software Foundation, Inc, + * 51 Franklin Street, Fifth Floor, + * Boston, MA 02110-1301 USA + * or just google for it. + * + * Authors: + * Arjan van de Ven <arjan@linux.intel.com> + */ +#include "measurement.h" +#include "acpi.h" +#include "extech.h" +#include "sysfs.h" +#include "opal-sensors.h" +#include "../parameters/parameters.h" +#include "../lib.h" + +#include <string> +#include <sys/types.h> +#include <dirent.h> +#include <stdio.h> +#include <fstream> +#include <unistd.h> +#include <time.h> + +double min_power = 50000.0; + +void power_meter::start_measurement(void) +{ +} + + +void power_meter::end_measurement(void) +{ +} + + +double power_meter::power(void) +{ + return 0.0; +} + +vector<class power_meter *> power_meters; + +static struct timespec tlast; + +void start_power_measurement(void) +{ + unsigned int i; + clock_gettime(CLOCK_REALTIME, &tlast); + for (i = 0; i < power_meters.size(); i++) + power_meters[i]->start_measurement(); + all_results.joules = 0.0; +} +void end_power_measurement(void) +{ + unsigned int i; + for (i = 0; i < power_meters.size(); i++) + power_meters[i]->end_measurement(); +} + +double global_power(void) +{ + bool global_discharging = false; + double total = 0.0; + unsigned int i; + + for (i = 0; i < power_meters.size(); i++) { + global_discharging |= power_meters[i]->is_discharging(); + total += power_meters[i]->power(); + } + + /* report global time left if at least one battery is discharging */ + if (!global_discharging) + return 0.0; + + all_results.power = total; + if (total < min_power && total > 0.01) + min_power = total; + return total; +} + +void global_sample_power(void) +{ + struct timespec tnow; + + clock_gettime(CLOCK_REALTIME, &tnow); + /* power * time = joules */ + all_results.joules += global_power() * \ + ( ((double)tnow.tv_sec + 1.0e-9*tnow.tv_nsec) - \ + ((double)tlast.tv_sec + 1.0e-9*tlast.tv_nsec)); + tlast = tnow; +} + +double global_joules(void) +{ + return all_results.joules; +} + +double global_time_left(void) +{ + bool global_discharging = false; + double total_capacity = 0.0; + double total_rate = 0.0; + unsigned int i; + for (i = 0; i < power_meters.size(); i++) { + global_discharging |= power_meters[i]->is_discharging(); + total_capacity += power_meters[i]->dev_capacity(); + total_rate += power_meters[i]->power(); + } + /* report global time left if at least one battery is discharging */ + if (!global_discharging) + return 0.0; + + /* return 0.0 instead of INF+ */ + if (total_rate < 0.001) + return 0.0; + return total_capacity / total_rate; +} + +void sysfs_power_meters_callback(const char *d_name) +{ + std::string type = read_sysfs_string("/sys/class/power_supply/%s/type", d_name); + + if (type != "Battery" && type != "UPS") + return; + + class sysfs_power_meter *meter; + meter = new(std::nothrow) class sysfs_power_meter(d_name); + if (meter) + power_meters.push_back(meter); +} + +void acpi_power_meters_callback(const char *d_name) +{ + class acpi_power_meter *meter; + meter = new(std::nothrow) class acpi_power_meter(d_name); + if (meter) + power_meters.push_back(meter); +} + +void sysfs_opal_sensors_callback(const char *d_name) +{ + class opal_sensors_power_meter *meter; + const char *c; + + /* Those that end in / are directories and we don't want them */ + c = strrchr(d_name, '/'); + if (c && *(c+1) == '\0') + return; + + meter = new(std::nothrow) class opal_sensors_power_meter(d_name); + if (meter) + power_meters.push_back(meter); +} + +void detect_power_meters(void) +{ + process_directory("/sys/class/power_supply", sysfs_power_meters_callback); + process_glob("/sys/devices/platform/opal-sensor/hwmon/hwmon*/power*", sysfs_opal_sensors_callback); + if (power_meters.size() == 0) { + process_directory("/proc/acpi/battery", acpi_power_meters_callback); + } +} + +void extech_power_meter(const char *devnode) +{ + class extech_power_meter *meter; + + meter = new class extech_power_meter(devnode); + + power_meters.push_back(meter); +} |