| /linux/Documentation/scheduler/ |
| H A D | sched-energy.rst | 2 Energy Aware Scheduling
8 Energy Aware Scheduling (or EAS) gives the scheduler the ability to predict
9 the impact of its decisions on the energy consumed by CPUs. EAS relies on an
10 Energy Model (EM) of the CPUs to select an energy efficient CPU for each task,
20 because this is where the potential for saving energy through scheduling is
25 please refer to its documentation (see Documentation/power/energy-model.rst).
32 - energy = [joule] (resource like a battery on powered devices)
33 - power = energy/time = [joule/second] = [watt]
35 The goal of EAS is to minimize energy, while still getting the job done. That
44 energy [J]
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| /linux/Documentation/ABI/testing/ |
| H A D | sysfs-firmware-papr-energy-scale-info | 5 energy/frequency on Linux running as a PAPR guest.
9 energy-savings mode and processor frequency.
14 Description: Energy, frequency attributes directory for POWERVM servers
19 Description: String description of the energy attribute of <id>
24 Description: Numeric value of the energy attribute of <id>
29 Description: String value of the energy attribute of <id>
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| /linux/Documentation/devicetree/bindings/net/ |
| H A D | smsc-lan87xx.txt | 12 - smsc,disable-energy-detect:
13 If set, do not enable energy detect mode for the SMSC phy.
14 default: enable energy detect mode
17 smsc phy with disabled energy detect mode on an am335x based board.
25 smsc,disable-energy-detect;
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| /linux/net/bluetooth/ |
| H A D | Kconfig | 31 SMP (Security Manager Protocol) on LE (Low Energy) links
66 bool "Bluetooth Low Energy (LE) features"
70 Bluetooth Low Energy includes support low-energy physical
78 Bluetooth Low Energy L2CAP Enhanced Credit Flow Control available with
88 IPv6 compression over Bluetooth Low Energy.
139 Bluetooth Low Energy Secure Connections feature.
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| /linux/arch/x86/events/ |
| H A D | rapl.c | 3 * Support Intel/AMD RAPL energy consumption counters
12 * RAPL provides more controls than just reporting energy consumption
13 * however here we only expose the 3 energy consumption free running
67 MODULE_DESCRIPTION("Support Intel/AMD RAPL energy consumption counters");
71 * RAPL energy status counters
107 * RAPL Package energy counter scope:
108 * 1. AMD/HYGON platforms have a per-PKG package energy counter
423 RAPL_EVENT_ATTR_STR(energy-cores, rapl_cores, "event=0x01");
424 RAPL_EVENT_ATTR_STR(energy-pkg , rapl_pkg, "event=0x02");
425 RAPL_EVENT_ATTR_STR(energy-ram , rapl_ram, "event=0x03");
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| /linux/drivers/isdn/mISDN/ |
| H A D | dsp_ecdis.h | 61 /* Estimate the overall energy in the channel, and the energy in in echo_can_disable_detector_update()
62 the notch (i.e. overall channel energy - tone energy => noise). in echo_can_disable_detector_update()
64 Damp the overall energy a little more for a stable result. in echo_can_disable_detector_update()
65 Damp the notch energy a little less, so we don't damp out the in echo_can_disable_detector_update()
70 /* There is adequate energy in the channel. in echo_can_disable_detector_update()
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| /linux/Documentation/hwmon/ |
| H A D | ibmaem.rst | 4 This driver talks to the IBM Systems Director Active Energy Manager, known
26 This driver implements sensor reading support for the energy and power meters
31 The v1 AEM interface has a simple set of features to monitor energy use. There
32 is a register that displays an estimate of raw energy consumption since the
37 range of energy and power use registers, the power cap as set by the AEM
|
| H A D | ltc2947.rst | 21 The LTC2947 is a high precision power and energy monitor that measures current,
22 voltage, power, temperature, charge and energy. The device supports both SPI
24 The device also measures accumulated quantities as energy. It has two banks of
25 register's to read/set energy related values. These banks can be configured
97 energy1_input Measured energy over time (in microJoule)
99 energy2_input Measured energy over time (in microJoule)
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| /linux/include/linux/ |
| H A D | energy_model.h | 21 * energy calculation. Equal to: power * max_frequency / frequency
61 * misses during energy calculations in the scheduler
84 * energy consumption.
106 * To avoid possible energy estimation overflow on 32bit machines add
211 * em_cpu_energy() - Estimates the energy consumed by the CPUs of a
213 * @pd : performance domain for which energy has to be estimated
223 * Return: the sum of the energy consumed by the CPUs of the domain assuming
252 * Find the lowest performance state of the Energy Model above the in em_cpu_energy()
269 * the EM), the energy consumed by this CPU at that performance state in em_cpu_energy()
280 * units of power, it can be manipulated as an energy value in em_cpu_energy()
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| /linux/tools/power/x86/x86_energy_perf_policy/ |
| H A D | x86_energy_perf_policy.8 | 5 x86_energy_perf_policy \- Manage Energy vs. Performance Policy via x86 Model Specific Registers
21 displays and updates energy-performance policy settings specific to
31 Further, it allows the OS to influence energy/performance trade-offs where there
82 Set a policy with a normal balance between performance and energy efficiency.
84 for potentially significant energy savings.
90 accepting no performance sacrifice for the benefit of energy efficiency.
94 but allowing some performance loss to benefit energy efficiency.
102 a measurable performance impact to maximize energy efficiency.
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| /linux/Documentation/devicetree/bindings/hwmon/ |
| H A D | adi,ltc2947.yaml | 7 title: Analog Devices LTC2947 high precision power and energy monitor
13 Analog Devices LTC2947 high precision power and energy monitor over SPI or I2C.
29 charge and energy. When an external clock is used, this property must be
36 calculate charge and energy so that, they can be only accumulated for
68 the accumulation of charge, energy and time. This function can be
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| H A D | vexpress.txt | 10 "arm,vexpress-energy"
19 energy@0 {
20 compatible = "arm,vexpress-energy";
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| /linux/Documentation/translations/zh_CN/scheduler/ |
| H A D | sched-energy.rst | 4 :Original: Documentation/scheduler/sched-energy.rst
30 它提供的内容，请参考其文档（见Documentation/power/energy-model.rst）。
77 见Documentation/power/energy-model.rst）
139 1024 - - - - - - - Energy Model
166 Energy calculation:
184 Energy calculation:
201 Energy calculation:
287 Documentation/power/energy-model.rst中的独立EM框架部分。
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| /linux/Documentation/admin-guide/pm/ |
| H A D | intel_epb.rst | 5 Intel Performance and Energy Bias Hint
16 Intel Performance and Energy Bias Attribute in ``sysfs``
19 The Intel Performance and Energy Bias Hint (EPB) value for a given (logical) CPU
27 and a value of 15 corresponds to the maximum energy savings.
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| /linux/Documentation/arch/x86/ |
| H A D | intel-hfi.rst | 14 The HFI gives the operating system a performance and energy efficiency
22 about the performance and energy efficiency of each CPU in the system. Each
24 indicate higher capability. Energy efficiency and performance are reported in
38 task placement decisions. For instance, if either the performance or energy
41 that processor for performance or energy efficiency reasons, respectively.
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| /linux/include/linux/mfd/ |
| H A D | ac100.h | 112 #define AC100_DAC_DAP_L_H_E_A_C 0xa3 /* Left High Energy Avg Coef */
113 #define AC100_DAC_DAP_L_L_E_A_C 0xa4 /* Left Low Energy Avg Coef */
114 #define AC100_DAC_DAP_R_H_E_A_C 0xa5 /* Right High Energy Avg Coef */
115 #define AC100_DAC_DAP_R_L_E_A_C 0xa6 /* Right Low Energy Avg Coef */
120 #define AC100_DAC_DAP_H_E_TH 0xab /* High Energy Threshold */
121 #define AC100_DAC_DAP_L_E_TH 0xac /* Low Energy Threshold */
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| /linux/tools/testing/selftests/amd-pstate/ |
| H A D | gitsource.sh | 14 #8) Plot png images about time, energy and performance per watt for each test.
28 # $1: governor, $2: round, $3: des-perf, $4: freq, $5: load, $6: time $7: energy, $8: PPW
91 …$PERF stat -a --per-socket -I 1000 -e power/energy-pkg/ /usr/bin/time -o $BACKUP_DIR/$OUTFILE_GIT.…
120 grep Joules $OUTFILE_GIT-perf-$1-$2.log | awk '{print $4}' > $OUTFILE_GIT-energy-$1-$2.log
121 en_sum=$(awk 'BEGIN {sum=0};{sum += $1};END {print sum}' $OUTFILE_GIT-energy-$1-$2.log)
125 …# seconds. It is well known that P=E/t, where P is power measured in watts(W), E is energy measure…
175 …$OUTFILE_GIT.result | grep "power consumption(J):" | awk '{print $NF}' > $OUTFILE_GIT-energy-$1.log
176 en_sum=$(awk 'BEGIN {sum=0};{sum += $1};END {print sum}' $OUTFILE_GIT-energy-$1.log)
179 avg_en=$(awk 'BEGIN {sum=0};{sum += $1};END {print sum/'$LOOP_TIMES'}' $OUTFILE_GIT-energy-$1.log)
183 …# seconds. It is well known that P=E/t, where P is power measured in watts(W), E is energy measure…
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| H A D | tbench.sh | 12 # 6) Plot png images about performance, energy and performance per watt for each test.
23 # $1: governor, $2: round, $3: des-perf, $4: freq, $5: load, $6: performance, $7: energy, $8: perfo…
71 …$PERF stat -a --per-socket -I 1000 -e power/energy-pkg/ tbench -t $TIME_LIMIT $PROCESS_NUM > $OUTF…
102 grep Joules $OUTFILE_TBENCH-perf-$1-$2.log | awk '{print $4}' > $OUTFILE_TBENCH-energy-$1-$2.log
103 en_sum=$(awk 'BEGIN {sum=0};{sum += $1};END {print sum}' $OUTFILE_TBENCH-energy-$1-$2.log)
107 …# It is well known that P=E/t, where P is power measured in watts(W), E is energy measured in joul…
157 …LE_TBENCH.result | grep "power consumption(J):" | awk '{print $NF}' > $OUTFILE_TBENCH-energy-$1.log
158 en_sum=$(awk 'BEGIN {sum=0};{sum += $1};END {print sum}' $OUTFILE_TBENCH-energy-$1.log)
161 …avg_en=$(awk 'BEGIN {sum=0};{sum += $1};END {print sum/'$LOOP_TIMES'}' $OUTFILE_TBENCH-energy-$1.l…
165 …# It is well known that P=E/t, where P is power measured in watts(W), E is energy measured in joul…
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| /linux/drivers/powercap/ |
| H A D | Kconfig | 84 bool "Add CPU power capping based on the energy model"
88 energy model.
91 bool "Add device power capping based on the energy model"
95 energy model.
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| /linux/drivers/gpu/drm/xe/ |
| H A D | xe_hwmon.c | 52 * struct xe_hwmon_energy_info - to accumulate energy
55 /** @reg_val_prev: previous energy reg val */
57 /** @accum_energy: accumulated energy */
73 /** @scl_shift_energy: pkg energy unit */
77 /** @ei: Energy info for energyN_input */
240 * xe_hwmon_energy_get - Obtain energy value
242 * The underlying energy hardware register is 32-bits and is subject to
253 * minutes) by accumulating the energy register into a 'long' as allowed by
260 xe_hwmon_energy_get(struct xe_hwmon *hwmon, int channel, long *energy) in xe_hwmon_energy_get() argument
276 *energy = mul_u64_u32_shr(ei->accum_energy, SF_ENERGY, in xe_hwmon_energy_get()
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| /linux/Documentation/power/ |
| H A D | energy-model.rst | 4 Energy Model of devices
10 The Energy Model (EM) framework serves as an interface between drivers knowing
12 subsystems willing to use that information to make energy-aware decisions.
26 can be found in the Energy-Aware Scheduler documentation
27 Documentation/scheduler/sched-energy.rst. For some subsystems like thermal or
36 an 'abstract scale' deriving real energy in micro-Joules would not be possible.
51 | Energy Model |
187 There are two API functions which provide the access to the energy model:
193 Subsystems interested in the energy model of a CPU can retrieve it using the
194 em_cpu_get() API. The energy model tables are allocated once upon creation of
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| /linux/drivers/gpu/drm/i915/ |
| H A D | i915_hwmon.c | 24 * - energy - microjoules
45 long accum_energy; /* Accumulated energy for energy1_input */
57 struct hwm_energy_info ei; /* Energy info for energy1_input */
114 * hwm_energy - Obtain energy value
116 * The underlying energy hardware register is 32-bits and is subject to
127 * minutes) by accumulating the energy register into a 'long' as allowed by
134 hwm_energy(struct hwm_drvdata *ddat, long *energy) in hwm_energy() argument
159 *energy = mul_u64_u32_shr(ei->accum_energy, SF_ENERGY, in hwm_energy()
285 HWMON_CHANNEL_INFO(energy, HWMON_E_INPUT),
292 HWMON_CHANNEL_INFO(energy, HWMON_E_INPUT),
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| /linux/Documentation/devicetree/bindings/cpu/ |
| H A D | idle-states.yaml | 71 timing and energy related properties, that underline the HW behaviour
101 IDLE: This is the actual energy-saving idle period. This may last
144 expressed in time units but must factor in energy consumption coefficients.
146 The energy consumption of a cpu when it enters a power state can be roughly
169 Graph 1: Energy vs time example
173 and denotes the energy costs incurred while entering and leaving the idle
176 shallower slope and essentially represents the energy consumption of the idle
181 which choosing that state become the most energy efficient option. A good
183 states energy consumptions plots.
207 |IDLE1-energy < IDLE2-energy | IDLE2-energy < IDLE1-energy
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| /linux/arch/powerpc/platforms/pseries/ |
| H A D | papr_platform_attributes.c | 3 * Platform energy and frequency attributes driver
7 * energy and frequency configuration of the system.
73 * Energy modes can change dynamically hence making a new hcall each time the
140 * Extract and export the description of the energy scale attributes
159 * Extract and export the numeric value of the energy scale attributes
178 * Extract and export the value description in string format of the energy
252 * uint64 H_GET_ENERGY_SCALE_INFO, // Get energy scale info in papr_init()
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| /linux/Documentation/devicetree/bindings/arm/ |
| H A D | vexpress-config.yaml | 242 "^energy(-.+)?$":
246 const: arm,vexpress-energy
249 description: energy sensor identifier
281 energy {
282 compatible = "arm,vexpress-energy";
|