Intel, Microsoft and Toshiba, "Advanced Configuration and Power Interface specification", URL: http://www.intel.com/ial/powermgm/specs.html, 1996  Home/Search   Document Not in Database   Summary   Related Articles   Check

....is difficult to distinguish the energy usage of concurrent operations, Spectra ignores data gathered from concurrently executing operations when modeling demand and predicting future energy needs. Spectra obtains energy measurements from two sources: the Advanced Configuration and Power Interface [8] and SmartBattery [18] device drivers. Each source is supported by a separate resource monitor this modular design makes it easy to select the appropriate measurement methodology when compiling for different hardware platforms. 3.3.4 The file cache state monitor The Coda file system hides ....

Intel, Microsoft, and Toshiba. Advanced Configuration and Power Interface Specification, February 1998. http://www.teleport.com/acpi/.

....link is symmetric, with equal the transmit and receive bandwidths. The energy predictor monitors battery charge levels and power state, and estimates the remaining battery lifetime. I use the battery monitoring infrastructure developed by Flinn [32] which queries the hardware using the ACPI [49] interface. File cache predictor I use the Coda file system [55] to store data shared by clients and servers, and to manage data consistency. The file cache predictor [32] queries Coda to get the file cache supply, i.e. the list of valid cache entries. 5.6 Demand monitors At the end of each ....

Intel, Microsoft, and Toshiba. Advanced configuration and power interface specification v2.0. http://www.acpi.info/, February 1998.

....for power management. In this scenario we consider the case where a user is running several applications, each incorporating a periodic auto save feature (which, as we shall see, has an associated effect on the power consumption of the system) Existing power managements systems e.g. the ACPI [12] model, enable the switching of hardware into a low power mode when not in use. For savings in power consumption to be made, applications should attempt to keep the hardware resources in an idle state for as long as possible so that the time spent in low power mode is maximised. In the case of the ....

Intel/Microsoft/Toshiba. Advanced configuration and power interface specification, revision 1.0, 1999.

....For corporate confidential communication, an applicationbased end to end security mechanism should be used. Wakeup Because battery life is so important, the PC industry has defined a variety of low power modes in the Advanced Configuration and Power Management Interface (ACPI) specification [3]. Table 1 describes the ACPI sleeping states. To enable proximity based, unconscious application level activity while preserving battery life, the PC must migrate from sleeping states to a working state, and back again to a sleeping state. The PC may be woken up through an interrupt, and ACPI ....

Intel, Microsoft, and Toshiba, "Advanced Configuration and Power Interface Specification," Revision 1.0b, February 2, 1999.

....and thus increase battery lifetime [5] System level dynamic power management [6] decreases the energy consumption by selectively placing idle components into lower power states. System resources can be modelled using state based abstraction where each state trades off performance for power [7]. The transitions between states are controlled by commands issued by a power manager (PM) that observes the workload of the system and decides when and how to force power state transitions. The power manager makes state transition decisions according to the power management policy. The choice of ....

....to the OS. When any event occurs that concerns the hard disk, power manager is notified. When the PM issues a command, the filter driver creates a power transition call and sends it to the device which implements the power transition using Advanced Configuration and Power Interface standard [7]. The change in power state is also detected with the digital multimeter that measures current consumption of the hard disk. Table 1.5. Hard Disk Measurement Comparison Laptop Desktop Algorithm Pwr (W) ### ### ###### Pwr (W) ### ### ###### Oracle 0.33 250 0 118 1.64 164 0 166 TISMDP 0.40 326 ....

Intel, Microsoft and Toshiba, "Advanced Configuration and Power Interface specification", 1996.

....level. An early work on software architecture to enable power management at OS level include BIOS based Advanced Power Management (APM [24] The principal limitation of APM is that the OS has no knowledge of the APM actions. Its follow on, the Advanced Configuration and Power Management (ACPI [23]) allows OS directed power management by defining hardware registers and BIOS interfaces (table, control methods) ACPI primarily enables use of Intel specific hardware mechanisms for power reduction. It does not provide any support for real time contraints. More importantly, it does not provide ....

Intel, Microsoft, and Toshiba. Advanced configuration and power interface specification, 1996.

....State Diagram 161 being used. Since our techniques address issues regarding the end to end transmission of data, we assume that this wakeup time is minimal in comparison to the total transfer time. Although this may not be true for all devices currently, the interface standards proposed n [10] suggest that future devices will provide relatively inexpensive transitions between waking and sleeping states. 4 Experiments The goal of our experiments is to show that, by using our power management techniques, we can save a sigriffcant amount of the power consumed by the wireless Ethernet ....

Intel Corporation, Microsoft Corporation and Toshiba Corporation. Advanced Configuration and Power Interface Specification, revision 1.0a edition, July 1998.

....In trying to achieve a given discharge rate, the first challenge is to accurately determine the level of resource consumption for all subcomponents over time. One recent development in the OS directed management of the battery resource is the Smart Battery interface in the ACPI specifications [15] and compatible battery devices that support it. This interface allows the system to query the status of the battery, includ Time mW Process 1 Process 2 CPU disk CPU NIC CPU Figure 1: Accounting challenges of multiple devices and processes ing the present remaining capacity, present ....

Intel Corporation, Microsoft Corporation, and Toshiba Corporation. Advanced Configuration and Power Interface Specification. http://www.teleport.com/ acpi, December 1996.

....level. An early work on software architecture to enable power management at OS level include BIOS based Advanced Power Management (APM [11] The principal limitation of APM is that the OS has no knowledge of the APM actions. Its follow on, the Advanced Configuration and Power Management (ACPI [12]) allows OS directed power management by defining hardware registers and BIOS interfaces (table, control methods) ACPI primarily enables use of Intel specific hardware mechanisms for power reduction. It does not provide any support for real time contraints. More importantly, it does not provide ....

Intel, Microsoft, and Toshiba. Advanced configuration and power interface specification, 1996.

.... application of voltage and frequency scaling or various sleep modes have become popular among microprocessors [3, 4] A related approach is that of ACPI (Advanced Configuration and Power Interface) an open industry specification that defines an interface for the OS to activate low power modes [31]. Our work differs from ACPI in two ways. First, in ACPI, any decision and control of power modes is done by the OS. In our framework, the decision and control is best done with a combination of software and hardware, which enables finer grained energy management. Second, current ACPI releases ....

Intel, Microsoft and Toshiba, Advanced Configuration and Power Interface Specification, 1999.

....multimedia applications. This is important since most of the published papers to date (both in design automation and mobile computing communities) are focussed only on providing run time support [10,11] for PC based platforms when the Advanced Configuration and Power Interface (ACPI) is available [16]. The paper is organized as follows: Section 2 presents the overall modeling strategy. In Section 3, we present a detailed analysis of the MPEG 2 encoder decoder application. The power performance results are described in Section 4, together with some implications in the design process. Finally, ....

Intel, Microsoft and Toshiba, 'Advanced Configuration and Power Interface Specification,' http.'//www. intel.com/ial/powermgm/ specs. html, 1996.

....to achieve a given discharge rate, the first challenge is to accurately determine the level of resource consumption on a per device basis as a function of time. One recent development in the OS directed management of the battery resource is the Smart Battery interface in the ACPI specifications [14] and compatible battery devices that support it. This interface allows the system to query the status of the battery, including the present remaining capacity, present drain rate, and voltage. The Smart Battery seems to be a potentially powerful tool in support of energy management. However, our ....

Intel Corporation, Microsoft Corporation, and Toshiba Corporation. Advanced configuration and power interface specification. http://www.teleport.com/ acpi, December 1996.

.... application of voltage and frequency scaling or various sleep modes have become popular among microprocessors [11, 13] A related approach is that of ACPI (Advanced Configuration and Power Interface) an open industry specification that defines an interface for the OS to activate low power modes [14]. Our work differs from ACPI in two ways. First, in ACPI, any decision and control of power modes is done by the OS. In our framework, the decision and control is best done with a combination of software and hardware, which enables finer grained energy management. Second, current ACPI releases are ....

Intel, Microsoft and Toshiba. Advanced Configuration and Power Interface Specification, 1999.

....level has only recently been addressed. An overview of various approaches to system level power management, power optimization and efficient processor design is given in [1] The various approaches that have been proposed are based on memory hierarchy [2, 3] dynamic power management [4], dynamic supply voltage variation [5, 6] etc. So far only a few microarchitectural level solutions to the power problem have been proposed; for example [7] proposes a technique that uses confidence estimation to gate the execution of branches that are most likely to be mispredicted, and [8] ....

Compaq, Intel, Microsoft, Phoenix and Toshiba, Advanced Configuration and Power Interface Specification, 2000.

....a difficult process that may require many design iterations and careful debugging and validation. To simplify the design and validation of complex powermanaged systems, a number of standardization attempts have stated. Best known among them is the Advanced Configuration and Power Interface (ACPI) [6] that specifies an abstract and flexible interface between power manageable hardware components (VLSI chips, disk drivers, display drivers, etc. and the power manager (the system component that controls the turnon and turn off of the system components) It is important to mention that, ACPI ....

Intel, Microsoft and Toshiba, "Advanced Configuration and Power Interface specification", URL: http://www.intel.com/ial/powermgm/specs.html, 1996

No context found.

Intel, Microsoft and Toshiba, "Advanced Configuration and Power Interface specification", URL: http://www.intel.com/ial/powermgm/specs.html, 1996

No context found.

Intel, Microsoft and Toshiba, "Advanced Configuration and Power Interface specification", URL: http://www.intel.com/ial/powermgm/specs.html, 1996.

No context found.

Intel, Microsoft, and Toshiba. Advanced Configuration and Power Interface Specification, February 1998. http://www.acpi.info.

No context found.

Intel, Microsoft, and Toshiba. Advanced Configuration and Power Interface Specification, February 1998. http://www.teleport.com/acpi/.

No context found.

Intel, Microsoft and Toshiba, "Advanced Configuration and Power Interface specification", available at http://www.intel.com/ial/powermgm/specs.html, 1996.

No context found.

Intel, Microsoft and Toshiba, "Advanced configuration and power interface specification," [Online]. Available www: http://www.intel. com/ial/powermgm/specs.htm, 1996.

No context found.

Intel, Microsoft and Toshiba, "Advanced Configuration and Power Interface specification", available at http://www.intel.com/ial/powermgm/specs.html (1996).

No context found.

http://www.intel.com/ial/powermgm/specs.html, Intel, Microsoft and Toshiba, "Advanced Configuration and Power Interface specification", Dec. 1996.

No context found.

Intel, Microsoft, and Toshiba. (1996) Advanced configuration and power interface specification. [Online] http://www.intel.com/ial/powermgm /specs.html.

No context found.

Intel Corporation, Microsoft Corporation and Toshiba Corporation. Advanced Configuration and Power Interface Specification, revision 1.0a edition, July 1998.

First 50 documents

Online articles have much greater impact   More about CiteSeer.IST   Add search form to your site   Submit documents   Feedback  

CiteSeer.IST - Copyright Penn State and NEC