(51) Int Cl.: G06F 1/32 ( ) G06F 15/16 ( )

Transcription

1 (19) TEPZZ_99699 B_T (11) EP B1 (12) EUROPEAN PATENT SPECIFICATION (4) Date of publication and mention of the grant of the patent: Bulletin 1/11 (21) Application number: (22) Date of filing: (1) Int Cl.: G06F 1/32 (06.01) G06F 1/16 (06.01) (86) International application number: PCT/NO07/0000 (87) International publication number: WO 07/ ( Gazette 07/29) (4) DUAL MODE POWER-SAVING COMPUTING SYSTEM STROMSPARENDES DATENVERARBEITUNGSSYSTEM MIT ZWEIFACHER BETRIEBSART SYSTÈME INFORMATIQUE DOUBLE MODE À ÉCONOMIE D ÉNERGIE (84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR () Priority: US P (43) Date of publication of application: Bulletin 08/49 (73) Proprietor: CUPP COMPUTING AS 063 Bergen (NO) (72) Inventor: ELY, Omar Nathaniel N-03 Bergen (NO) (74) Representative: Rekdal, Kristine Bryn Aarflot AS P.O. Box 449 Sentrum 04 Oslo (NO) (6) References cited: EP-A WO-A2-03/046 GB-A US-A US-A US-A US-A US-A US-A US-A US-A US-A US-B EP B1 Note: Within nine months of the publication of the mention of the grant of the European patent in the European Patent Bulletin, any person may give notice to the European Patent Office of opposition to that patent, in accordance with the Implementing Regulations. Notice of opposition shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention). Printed by Jouve, 7001 PARIS (FR)

2 1 EP B1 2 Description TECHNICAL FIELD [0001] The present invention relates to computer hardware and software. Specifically it relates to a computer system architecture to reduce electrical power consumption. BACKGROUND AND PRIOR ART [0002] With ever increasing computing power - increased clock frequency, more memory, wider data paths - also power consumption of computing equipment has increased. This in turn requires increased effort in removal of dissipated heat from the electronic components but also larger power supplies or - in case of mobile equipment - better energy storage (batteries). Many innovations have been implemented to reduce power consumption, but still the typical laptop drains its battery in less than a working day. [0003] Besides reduction of power requirements in the field of the basic electronics (lower operational voltage for circuits f inst), some work has been done to also save power by simply powering down/switching off parts of a complex computing system when those parts are not needed for the current operation. The dichotomy is that computers often stand idle but consuming large amounts of power to maintain powerful processing capacitates, which is used only upon occasion. Many individuals computing needs could be met with little more than a smartphones computing capacity. [0004] Some attempts to address this issue have been made: The international patent application WO relates to a dual processor architecture - "Dualcor" - with two different processors and two operating systems (OS). These processors in this application are integrated on a single chip and share memory and graphics systems. [000] The Dualcor most resembles Intel patent number with the exception that it uses two OS to facilitate handheld use (read functionality) and reduced power consumption. Its claims are very similar to that of the Dualcor patent application. [0006] An application presented by Marvell World, integrates a PDA (Personal digital Assistant) on to a Notebook computer, allowing the user to access the personal information management (PIM), , and media (music) on a secondary screen with a several button input while allowing the x86 system to remain off, thus saving power. The computer includes a primary processor, a primary memory, and a primary input/output (I/O) interface that communicates with the primary processor and the primary memory. A primary display communicates with the primary I/O interface. The primary processor, the primary memory, and the primary display are operated in active and inactive modes and powered down when the computer is in the inactive mode. A secondary processor dissipates less power than the primary processor. A secondary display communicates with the secondary processor. The secondary processor and the secondary display are powered up when the computer is in the inactive mode. The secondary processor and display support PDA-like functionality when the computer is in the inactive mode. [0007] The US patent application discloses a computing device having a low power secondary processor coupled to a keyboard controller for the primary applications: Media Notebooks - Instant on DVD/TV, which is designed to be installed over existing x86 systems. As such it does not have access to system components such as USB. In point 0017 of the patent it does provide for network connections, this seems to be directed toward connection to the Internet. The patent makes a full range of system peripheries available to the "secondary processor". [0008] Another US patent application presents a multi-processor mobile computer system having one low power processor integrated within a "highly integrated chipset" (Combined Northbridge and Southbridge) and a conventional main processor, thus creating a computer system having two processors of different clock frequencies and different levels of power consumption. An interface circuit can select one of the two processors to operate at a time to reduce power consumption without compromising the system performance. [0009] US 03/ A1 discloses managing software within a data processing system comprising low and high performance computing subsystems. [00] Still there is a need for improving the prior art, which the present invention will do in several aspects. SUMMARY [0011] The present invention relates to a data processing system comprising a high-performance computing subsystems HP involving generally high power consumption and a low-performance computing subsystems LP having low power consumption. The invention is characterized in that the data processing system acts as a single computing device by moving the execution of a main operation alternatively to the high-performance subsystems HP when high computing performance is needed or the low-performance subsystems LP when low computing performance is sufficient. In the latter case the high-performance HP subsystems can be put into a power saving state. [0012] The invention relates also to a method to coordinate a LP subsystem and a HP subsystem in a data processing system in order to transparently move a software between the subsystems making the subsystems to act as a single computing device. After an initial booting step (a) bringing the LP subsystem from off 0 to power- 2

3 3 EP B1 4 on and keeping the HP subsystem powered-off 2 the method enters 21 a wait state (b), 2. On need for high computing performance 22, said HP subsystem is booted 2, 23 entering a booted state 2. In the next step control of user interface means is transferred to the HP subsystem and the software to be executed is started 24, 20, 2, 260. In a situation of annulment of the need 26 for high computing performance, control of the user interface means is transferred to the LP subsystem, the software is stopped and resources released 270, 27. Then the HP subsystem is transferred into a power-saving mode and the method brings the system finally back to the wait state of step (b) 280, 28, 2. [0013] The invention relates further to a method to coordinate at least two subsystems in a data processing system in order to transparently move an active main operation between those subsystems making those subsystems to act as a single computing device. This is done by two procedures, wherein the first procedure executes on the first subsystems and comprises the steps of (a) gathering information about the state of the main operation on the first subsystems, which comprises the state of allocated resources, (b) saving this state information to a storage means shared by both subsystems and (c) closing down the main operation on the first subsystems comprising releasing resources. The second procedure executing on a second subsystems comprises the steps of (i) fetching the saved information about the first state of the main operation from the shared storage means, (ii) starting up the main operation on the second subsystems comprising allocating resources according to the saved state information, and (iii) establishing a state on the second subsystems corresponding to the information about the first statue. [0014] The invention is defined according to the system of claim 1 and the method of claim. BRIEF DESCRIPTION OF THE DRAWINGS [001] Below the present invention will be described in greater detail with reference to the attached drawings, in which Figure 1 shows the block diagram of the complete data processing system structured in hardware, software, low-performance and high-performance subsystems and shared equipment, Figure 2 shows a block diagram of the system more specifically aimed at the x86 architecture, presenting the low-performance processor connected to the I/O hub by PCI e and USB interface; Figure 3 gives a similar view as Figure 2, but the LPprocessor connects using USP and UART; Figure 4 shows the block diagram of a x86-"southbridge" with the LP processor integrated; Figure presents the state diagram for the process of moving the execution of application programs between the low- and high-performance subsystems; Figure 6 illustrates an implementation as PCIe-card (=PCI express) for the x86 architecture; Figure 7 presents a block diagram for a detachable, stand-alone, low-performance module implementation; while Figure 8 corresponds to two procedures used in synchronizing both subsystems. DETAILED DESCRIPTION OF PREFERRED EMBOD- IMENTS [0016] Preferred embodiments of the present invention will now be described in detail with reference to the attached drawings. [0017] The circumstance of unwanted high power consumption creates an opening for a computing system which is comprised of a high performance subsystem and a low performance subsystem. These two subsystems are then merged via hardware and software integration to create a single system. [0018] In the industry standard situation, the invention can be implemented - but is not limited to it - in the x86 architecture best known as the PC architecture using the industry standard Intel x86 processor family or compatible processors which is used throughout this document as an example, but not limitation, for a high-performance, high-powered processor. The x86 architecture comprises the so-called Northbridge organizing the access of the central processor to internal volatile memory, the graphic processing and to the so-called Southbridge. The Southbridge handles all other and system management. The Northbridge and the above mentioned equipment attached to it, can be considered as the high-performance subsystem HP. Then, according to the present invention, a low-performance subsystem can be connected to or integrated into the Southbridge using a low-power, low-performance processor. This could for instance be an industry-standard ARM RISC-processor which will be used as an example, but not limitation in this document. [0019] Figure 1 shows a block diagram of a data processing system 0 comprising on the left side a highperformance computing subsystem HP with both a hardware part below and a software part above. Typical in computer electronics, high-performance equipment - everything else being equal - has high power consumption. The right side of the diagram shows a corresponding low-performance subsystem LP having lower power consumption compared with the high-performance subsystem HP. Both software and hardware are divided into layers with the common desktop 170, 17 at top, making the data processing system as a whole appear to the user substantially as a single computing device. Below the common desktop is the application layer 160, 16 followed by the operating system. By moving the execution of software in the application layer to the low-performance, low-power subsystem as long as it still performs according to the user s expectation the high-per- 3

4 EP B1 6 formance subsystem HP can be set into a different state which conserves power or even be switched off completely when the low-performance subsystem executes the software. [00] In any case the low-performance subsystem LP is always active and runs the basic administration of the total system, and also Always-On devices like any communication equipment (GPS, RF-modules, network interfacing components - NIC, WiFi, Bluetooth, GPRS, CD- MA...) may be connected to the LP sub-system. The operating systems (OS) 10,1 running on the subsystems are adapted to their respective computing performance and tasks. [0021] To give the user the impression of working on a single computing device, it is important to retain a user interface and a use of peripheral devices independent, on which one of the subsystems the software is executed. To achieve this, the display means (typically a LCDscreen) is controlled by the low-performance subsystem LP while the high-performance subsystem HP is in a power saving/- hibernating/off state, and by the high-performance subsystem HP while the HP subsystem is executing the software application or user programs - also called "main operation" - requiring high-performance computing resources. [0022] As rather independent (sub-) systems of their own with largely different requirements for performance and power consumption, both systems comprise their own main processor, graphical processor and storage adapted to the specific requirements. [0023] For further supporting the cooperation of the operating system of both subsystems, at least one communication link 190 (IP link) interconnects the high-performance subsystem HP with the low-performance subsystem LP. This communication link 190 can provide a connection from the low-performance subsystem LP to the high-performance HP subsystem. This link uses IP/TCP or other protocols to link the two systems together. Although diagrammed in the software layer, the physical link is between I/O areas of respective systems. Peripheral devices can be shared using this link or by using a wider connection on the I/O Hub. This is dependent upon required system performance. [0024] The subsystems typically share a common basic input/output system (BIOS) and an Advanced Configuration and Power Interface (ACPI). [002] The decision on which of the subsystems the execution of the application program shall be moved to, is in one preferred embodiment indicated by a switch 180,18, being a physical switch, a selector item as a part of the user interface on the computer display, or a result of software based evaluating a set of predetermined factors internal to the data processing system. [0026] The switch changes typically the connection 12 of peripheral devices to that subsystem which is intended to execute the application program. This will allow the system to function in two distinct modes, each of which will be recognized by all peripheral devices as "Master" of the system depending on which CPU is active. [0027] Figures 2 and 3 show a block diagram of the x 86 architecture. Processor, volatile memory and graphics processing means are connected together and to the Southbridge by the Northbridge. The Southbridge acts as an I/O-hub for a number of protocols (SATA, PCIe, USB...) and provides connectivity also for the low-performance subsystem LP. In figure 2 this connectivity is as an example provided by a PCIe, forming the link to access the HP subsystem peripheral devices, and a USB channel used to transmit and receive data across the IP link 190, while figure 3 uses USB and UART for the same purposes. [0028] The figures 2 and 3 indicate an implementation of the low-performance subsystem on the motherboard being a chip that sits next to the Southbridge and interfaces via any number of protocols while figure 6 indicates the LP-subsystem being a detachable unit (PDA and the like), equipped with UI inputs (Keyboard, touchscreen, jog wheel, "five way directional pad" or similar inputs and display.), power source, antennas for embedded RF devices, ports, small screen UI suited to its form factor and use and other features characteristic of the product category. [0029] Figure 4 shows the block diagram of one possible embodiment of the present invention where the lowperformance subsystem LP is implemented as a part of the x86 architecture Southbridge, this Southbridge also called the input/- output hub 1. An internal shared bus connects all internal I/O interface modules (PCIe, LAN, USB, AUDIO, SATA, IDE, DMA) and internal system administration modules (RESET, POWER, TEST, INTER- RUPT, APIC) with the Northbridge, the BIOS and the integrated low-performance processor (ARM for instance), which in turn connects to external non-volatile memory, volatile memory, graphics, radio equipment and possibly more. [00] Figure 6 shows an embodiment of the invention where the low-performance system is implemented as a PCIe card - both standard format and mini-pcie for notebooks are possible. In addition to the components mentioned above in connection with the description of the other embodiments, here the card also comprises keyboard, mouse and display connectors and furthermore LAN, SATA, USB, AUDIO, network and other connectors enabling it to act as a low-performance, low-power subsystem LP according to the principles of the present invention. As being able already today, they could listen to network wake-up signals, but unlike today, they would in many cases not need to wake up the complete workstation, but rather do the requested job on their own. [0031] Figure 7 illustrates an embodiment of the invention, where the low-performance subsystem LP - together with an additional power supply and user interface means - forms a removable stand-alone data processing system like a PDA, Smartphone or the like, which together with a substantially larger unit provides a full-featured com- 4

5 7 EP B1 8 puting environment, but removed from this full-featured computing environment provides an ultra-portable minorperformance computing unit. [0032] As a further embodiment of the invention, the presence of a second distinct CPU is used for multitasking and server client/protocols within the system where for example, tasks which are performed more power-efficiently on an ARM processor, can be handled by the secondary processor even when the x86 is active. In one case ARM functions as a slave processor for the x86, handling always on task such as GPRS, GPS and other radios, an Audio could also be handled by the ARM if so chosen. In another case the ARM would function as a server for the x86 system exposing services to the HP OS. [0033] The possible state-switching logic according to the present invention is given in figure. Minor variants may occur dependant on implementations of the present invention. [0034] It starts - state 0 - with the combined system being powered off: both subsystems, here being represented by the x86 known from the PC, and the ARM processor, typically applied in embedded applications such as mobile phones and PDA s. [003] Upon powering-on - transition - from OFFstate 0 the LPBoot process begins. [0036] State 2 is entered. Still the x86 remains off while the ARM is booting. After booting, the ARM enters state 2 (low power mode). After transition 21 ARM boot is finished. [0037] The low-performance subsystem is now in state 2 "Low Power Mode". In this state the ARM is in control of the device. This mode of operation allows users to perform various computing tasks with full access to peripheries on the device (such as hard drives and embedded radio frequency devices, cameras, other). With an ARM processor such tasks might include light office work, editing of documents, Use of calendar, , music playback, video playback, personal entertainment programs and similar activities. [0038] On a signal given the system enters 22 the state 2 and the high-performance x86 type processor starts its boot/resume routine. In state 2 the x86 is executing its boot sequence and gathers desktop and user environment information from database(s). The desktop, the user I/O and environment (that is pointing devices, character input and shared desktop, user settings for instance) remain in the control of the low-performance processor. The user may be notified of this process via UI cue otherwise it is undisturbed by said process. A signal transfers 23 the system over to state 2 indicating that the x86 has finished its boot sequence. At this point both processors and OS are running. Here error checking and data hand off for desktop and user environment may occur. The desktop and the user I/O and environment (that is pointing device, character input and shared desktop) still remain under the control of the low-performance processor [0039] The transition 24 shows that the processes of state 2 have been completed and state 20 is entered where switching user I/O between respective subsystems occurs. This may be characterized by a momentary flicker on the display means. An image from BIOS may be displayed, an on-screen timer, or other UI niceties may be used. [00] Transition 2 makes the system indicating that hand off of user I/O is complete and arriving in state "Full power mode". In this mode the x86 controls both the UI and peripheries. [0041] Transition 26 upon a signal transfers into state 270 making the x86 to start to shutdown, hibernate or sleep, switching user I/O between respective subsystems. This again may be characterized by a momentary flicker on the screen. User environment is described for ARM system. An image from BIOS may be displayed, an on-screen timer, or other UI niceties may be used. [0042] After transition 27 hand off of user I/O is complete and the system arrives at state "Low Power Mode". In this state the low-performance subsystem is in control of the device. This mode of operation allows users to perform various computing tasks with full access to peripheries on the device (such as hard drives and embedded radios). With an ARM processor such tasks might include light office work, editing of documents, use of calendar, , music playback, video playback, personal entertainment programs and similar activities. [0043] The transition 28 indicates the x86 shutdown/sleep/hibernation process continues until completed. The system arrives at state 2 again. [0044] A timeout function during this state can transfer 289 the system into state 290, a standby state where even the ARM is in a sleep-mode, some user I/O is off, the whole system consuming even less power. Any wake-up event (PoC - Point of Contact, ex. keyboard input, incoming call on GPRS, calendar event) will initiate the opposite transition 291 and put the system in state 2. [004] The invention concerns also a method according to the flow chart in figure 8 to coordinate the two subsystems in order to transparently move the software to be executed between the subsystems making these subsystems to act as a single computing device. [0046] The method comprises two procedures, the first procedure executed on the first subsystem comprising the steps: (a) gathering information about the state of the software on the first subsystem including information about allocated resources (0); then (b) storing the this state information to a storage means shared by both subsystems (3), and (c) closing down the software on the first subsystem including releasing/unmounting the resources (3). The second procedure executes on the second subsystem and includes the steps (i) fetching the stored information about the first state of the software from the shared storage means (3), (ii) starting up the software on the second subsystem comprising also allocating/mounting the resources according to the above

6 9 EP B1 mentioned saved state information (3), (iii) establishing a second state on the second subsystem corresponding to information about the first state (), and (iv) saving the second state information to a storage means shared by both subsystems (360). [0047] In a typical embodiment a final step (d) in the first procedure comprises putting the first subsystem into a passive, power saving state. [0048] According to one embodiment of the invention parts of the state information on the storage means are updated dynamically, when these part are observed to change on the subsystem, are updated sequentially as the operating system is in process, or are updated as system resources become available to execute background tasks. [0049] Generally speaking the present invention can be embodied as combinations of software and hardware modules, but will typically be implemented as a set of hardware gate logic optimized for use in a given chipset and integral with the mentioned input/output hub ("Southbridge"). 1 said high-performance computing subsystem when high computing performance is needed (22) by booting said high-performance computing subsystem (2, 23) into a booted state (2), transferring control of user interface means to said high-performance computing subsystem and running said software (24, 20, 2, 260), or said low-performance computing subsystem when low computing performance is sufficient, by transferring control of user interface means to said lowperformance computing sub-system, and stopping said software (270, 27); and if said low computing performance is sufficient, to put said high-performance computing subsystem into a power saving mode, thereby arriving at said lowpower waiting state (280, 28, 2). Claims 1. A data processing system characterized by: a high-performance computing subsystem having a first processor, a low-performance computing subsystem having a second processor independent from said first processor and said low-performance computing subsystem having lower power consumption and lower computing performance than said high-performance computing subsystem, and a controller coupled to said high-performance computing subsystem and to said low-performance computing subsystem; said low-performance computing subsystem : (i) being configured to be controlled by said controller, and (ii) being configured to: Data processing system according to claim characterized in that said low-performance computing subsystem performs at least one task even when said high-performance computing subsystem is actively executing said software. 3. Data processing system according to claim characterized in that said data processing system retains said user interface and a use of peripheral devices independent of, on which one of said subsystems said software is executed. 4. Data processing system according to claim characterized in that said subsystems use operating systems being adapted to their respective computing performance.. Data processing system according to claim characterized in that said subsystems comprise their own main processing means, graphical processing means and storage means. boot in an initial step from off (0) to power-on (), while keeping said high-performance computing sub-system powered-off (2), and enter (21) a low-power waiting state (2), enter upon an inactivity timeout (289) a standby state (290); return upon a wake-up event (291) to said low-power waiting state (2); and (iii) being configured to control said data processing system to act as a single computing device by moving software execution to one of: Data processing system according to claim characterized in that a display means is controlled by: said low-performance computing subsystem while said high-performance computing subsystem is in said power saving state, and said high-performance computing subsystem while said high-performance computing subsystem is executing said software. 7. Data processing system according to claim characterized in that at least one communication link interconnects said high-performance computing 6

7 11 EP B1 12 subsystem with said low-performance computing subsystem. 8. Data processing system according to claim or 7, characterized in that said communication link provides said connection to an input/output hub on said high-performance computing subsystem. 9. Data processing system according to claim 8, characterized in that peripheral devices are shared using said communication link.. Data processing system according to claim characterized in that said subsystems share a basic input/output system. 11. Data processing system according to claim characterized in that a decision on which of said subsystems said execution of said software shall be moved in, is indicated by a switch being at least one of: a physical switch, a selector as a part of said user interface on said display means, and a result of evaluating a set of predetermined factors internal to said data processing system. 12. Data processing system according to claim 1 characterized in that said switch is arranged to change a connection of peripheral devices to said subsystem, said subsystem being indicated to execute said software. 13. Data processing system according to claim 12, characterized in that said low-performance computing subsystem is detachable from said data processing system, providing-together with necessary power supply and user interface means-a stand-alone data processing system. 14. Data processing system according to claim characterized in that said low-performance subsystem is used for at least one of multitasking and server/client protocols within said data processing system, executing tasks on behalf of said high-performance computing subsystem Data processing system according to claim 16, characterized in that said always-on -tasks comprise drivers for radio input/output, audio-applications, wake-up functions. 18. Data processing system according to claim characterized in that said low-performance computing subsystem acts as a server for said high-performance computing subsystem. 19. Data processing system according to claim characterized in that said data processing system is based on core logic architecture, and said controller is part of said core logic.. A method to coordinate a low-performance computing subsystem and a high-performance computing subsystem in a data processing system in order to transparently move a software to be executed between said subsystems making said subsystems to act as a single computing device, the method characterized in the following steps: controlling said low-performance computing subsystem to: boot in an initial step, using a second processor of said low-performance subsystem, from off (0) to power-on (), while keeping said high-performance computing subsystem powered-off (2), said highperformance sub-system having a first processor independent of said second processor; enter (21) a low-power waiting state (2); on an inactivity timeout (289), enter a standby state (290); return on a wake-up event (291) to said lowpower waiting state (2); and when there is a need for high computing performance (22), to boot said high-performance computing subsystem (2, 23) into a booted state (2); transfer control of user interface means to said high-performance computing subsystem and run said software (24, 20, 2, 260); alternatively: 1. Data processing system according to claim characterized in that said low-performance computing subsystem acts as a slave processor for said high-performance computing subsystem. 16. Data processing system according to claim characterized in that said low-performance computing subsystem is arranged to handle always-on tasks. 0 when there is no need (26) for high computing performance, to transfer control of said user interface means to said low-performance computing subsystem and stop said software (270, 27); and if said low computing performance is sufficient, to put said high-performance computing subsystem into a powersaving mode, thereby arriving at said 7

8 13 EP B1 14 low-power waiting state (280, 28, 2). said system resources become available to execute background tasks. 21. Method according to claim, characterized in alternatively to enter a state of standby (290) when an inactivity timeout occurs (289) and returning to said low-power waiting state (2) on a wake-up event (291). Patentansprüche 1. Datenverarbeitungssystem, gekennzeichnet durch: 22. Method according to claim, characterized in stopping said software and saving a reentry point on one of said subsystems-a first subsystem-by running a first procedure on said first subsystem comprising the steps: gathering information about a first state of said software on said first subsystem comprising allocated resources (0), storing said first state information to a storage means shared by both subsystems (3), closing down said software on said subsystem comprising releasing memory (3), and putting said first subsystem into a passive power saving state. 23. Method according to claim, characterized in starting said software from a defined start point on one of said subsystems not being said first subsystem-a second subsystem-by running a second procedure on said second subsystem comprising the steps: fetching said stored information about said first state of said software from said shared storage means (3), starting up said software on said second subsystem comprising allocating resources according to said saved state information (3), establishing a second state on said second subsystem corresponding to said first state information (), saving said second state information to said storage means shared by both subsystems (360). 24. Method according to claim 22 or 23, characterized in that parts of said state information on said storage means are changed dynamically, when said part of said state information is changed. 2. Method according to claim 22 or 23, characterized in that parts of said state information on said storage means are updated sequentially as said operating system is in process. 26. Method according to claim 22 or 23, characterized in that parts of said state information on said storage means are updated sequentially as ein Hochleistungs-Rechensubsystem mit einem ersten Prozessor, ein Niedrigleistungs-Rechensubsystem mit einem zweiten, vom ersten Prozessor unabhängigen Prozessor, und wobei das Niedrigleistungs-Rechensubsystem einen niedrigeren Energieverbrauch und eine niedrigere Rechenleistung als das Hochleistungs-Rechensubsystem hat, und eine Steuerung, die an das Hochleistungs-Rechensubsystem und an das Niedrigleistungs- Rechensubsystem gekoppelt ist; wobei das Niedrigleistungs-Rechensubsystem: (i) konfiguriert ist, von der Steuerung gesteuert zu werden, und (ii) für Folgendes konfiguriert ist: Hochfahren, in einem ersten Schritt, von ausgeschaltet (0) zu eingeschaltet (), während das Hochleistungs-Rechensubsystem ausgeschaltet (2) bleibt, und Eintreten (21) in einen Wartezustand mit niedrigem Energieverbrauch (2), Eintreten, bei einer Inaktivitäts-Zeitüberschreitung (289), in einen Standby-Zustand (290); Zurückkehren, bei einem Aufwachereignis (291), in den Wartezustand mit niedrigem Energieverbrauch (2); und (iii) konfiguriert ist, das Datenverarbeitungssystem derart zu steuern, dass es als eine einzelne Rechenvorrichtung arbeitet, indem die Ausführung der Software auf eines der folgenden verlagert wird: das Hochleistungs-Rechensubsystem, wenn eine hohe Rechenleistung benötigt wird (22), indem das Hochleistungs-Rechensubsystem in einen hochgefahrenen Zustand (2) hochgefahren wird (2, 23), wobei die Steuerung des Benutzerschnittstellenmittels an das Hochleistungs- Rechensubsystem übertragen und die Software ausgeführt wird (24, 20, 2, 260), oder das Niedrigleistungs-Rechensubsystem, 8

9 1 EP B1 16 wenn eine niedrige Rechenleistung ausreichend ist, indem die Steuerung des Benutzerschnittstellenmittels an das Niedrigleistungs-Rechensubsystem übertragen und die Software gestoppt wird (270, 27); und wenn die niedrige Rechenleistung ausreichend ist, das Hochleistungs-Rechensubsystem in einen Energiesparmodus versetzt wird, wodurch es in den Wartezustand mit niedrigem Energieverbrauch (280, 28, 2) gelangt. 2. Datenverarbeitungssystem nach Anspruch dadurch gekennzeichnet, dass das Niedrigleistungs-Rechensubsystem mindestens eine Aufgabe durchführt, selbst wenn das Hochleistungs-Rechensubsystem die Software aktiv ausführt. 3. Datenverarbeitungssystem nach Anspruch dadurch gekennzeichnet, dass das Datenverarbeitungssystem die Benutzerschnittstelle und eine Verwendung von peripheren Vorrichtungen unabhängig davon, auf welchem der Subsysteme die Software ausgeführt wird, beibehält. 4. Datenverarbeitungssystem nach Anspruch dadurch gekennzeichnet, dass die Subsysteme Betriebssysteme verwenden, die für die jeweilige Rechenleistung ausgelegt sind.. Datenverarbeitungssystem nach Anspruch dadurch gekennzeichnet, dass die Subsysteme ein eigenes Hauptverarbeitungsmittel, Grafikverarbeitungsmittel und Speichermittel umfassen. 6. Datenverarbeitungssystem nach Anspruch dadurch gekennzeichnet, dass ein Anzeigemittel durch Folgendes gesteuert wird: Datenverarbeitungssystem nach Anspruch 8, dadurch gekennzeichnet, dass periphere Vorrichtungen mittels der Kommunikationsverbindung gemeinsam genutzt werden.. Datenverarbeitungssystem nach Anspruch dadurch gekennzeichnet, dass die Subsysteme ein grundlegendes Eingangs-/Ausgangssystem gemeinsam nutzen. 11. Datenverarbeitungssystem nach Anspruch dadurch gekennzeichnet, dass eine Entscheidung, auf welches der Subsysteme die Ausführung der Software zu verlagern ist, durch einen Schalter angegeben wird, der mindestens einer von folgenden ist: ein physischer Schalter, ein Selektor als Teil der Benutzerschnittstelle auf dem Anzeigemittel, und ein Ergebnis des Bewertens einer Zusammenstellung von vorbestimmten internen Faktoren des Datenverarbeitungssystems. 12. Datenverarbeitungssystem nach Anspruch 1 dadurch gekennzeichnet, dass der Schalter dazu angeordnet ist, eine Verbindung von peripheren Vorrichtungen mit dem Subsystem zu ändern, wobei für das Subsystem angegeben wird, dass es die Software ausführt. 13. Datenverarbeitungssystem nach Anspruch 12, dadurch gekennzeichnet, dass das Niedrigleistungs-Rechensubsystem vom Datenverarbeitungssystem trennbar ist, wobei es - mit erforderlicher Stromversorgung und Benutzerschnittstellenmittel - ein eigenständiges Datenverarbeitungssystem bereitstellt. das Niedrigleistungs-Rechensubsystem, während sich das Hochleistungs-Rechensubsystem im Energiesparzustand befindet, und das Hochleistungs-Rechensubsystem, während das Hochleistungs-Rechensubsystem die Software ausführt Datenverarbeitungssystem nach Anspruch dadurch gekennzeichnet, dass das Niedrigleistungs-Rechensubsystem für mindestens eines von Multitasking- und Server/Client-Protokollen in dem Datenverarbeitungssystem verwendet wird, wobei es Aufgaben für das Hochleistungs-Rechensubsystem ausführt. 7. Datenverarbeitungssystem nach Anspruch dadurch gekennzeichnet, dass mindestens eine Kommunikationsverbindung das Hochleistungs-Rechensubsystem mit dem Niedrigleistungs-Rechensubsystem verbindet. 8. Datenverarbeitungssystem nach Anspruch oder 7, dadurch gekennzeichnet, dass die Kommunikationsverbindung die Verbindung mit einem Eingangs/Ausgangs-Hub am Hochleistungs-Rechensubsystem bereitstellt Datenverarbeitungssystem nach Anspruch dadurch gekennzeichnet, dass das Niedrigleistungs-Rechensubsystem als Slave-Prozessor für das Hochleistungs-Rechensubsystem fungiert. 16. Datenverarbeitungssystem nach Anspruch dadurch gekennzeichnet, dass das Niedrigleistungs-Rechensubsystem angeordnet ist, "Always- On"-Aufgaben zu erfüllen. 17. Datenverarbeitungssystem nach Anspruch 16, 9

10 17 EP B1 18 dadurch gekennzeichnet, dass die "Always-On"- Aufgaben Treiber für Funkeingang/-ausgang, Audio-Anwendungen, Aufwachfunktionen umfassen. 18. Datenverarbeitungssystem nach Anspruch dadurch gekennzeichnet, dass das Niedrigleistungs-Rechensubsystem als Server für das Hochleistungs-Rechensubsystem arbeitet. 19. Datenverarbeitungssystem nach Anspruch dadurch gekennzeichnet, dass das Datenverarbeitungssystem auf "Core-Logik"-Architektur basiert und die Steuerung Teil der Core-Logik ist.. Verfahren zum Koordinieren eines Niedrigleistungs- Rechensubsystems und eines Hochleistungs-Rechensubsystems in einem Datenverarbeitungssystem, um eine auszuführende Software transparent zwischen den Subsystemen zu verlagern, wobei die Subsysteme veranlasst werden, als eine einzelne Rechenvorrichtung zu arbeiten, wobei das Verfahren durch die folgenden Schritte gekennzeichnet ist: Steuern des Niedrigleistungs-Rechensubsystems für Folgendes: Hochfahren, in einem ersten Schritt, wobei ein zweiter Prozessor des Niedrigleistungs- Rechensubsystems verwendet wird, von ausgeschaltet (0) zu eingeschaltet (), während das Hochleistungs-Rechensubsystem ausgeschaltet (2) bleibt, wobei das Hochleistungs-Rechensubsystem einen vom zweiten Prozessor unabhängigen ersten Prozessor hat; Eintreten (21) in einen Wartezustand mit niedrigem Energieverbrauch (2); Eintreten, bei einer Inaktivitäts-Zeitüberschreitung (289), in einen Standby-Zustand (290); Zurückkehren, bei einem Aufwachereignis (291), in den Wartezustand mit niedrigem Energieverbrauch (2); und wenn ein Bedarf an hoher Rechenleistung besteht (22), Hochfahren (2, 23) des Hochleistungs-Rechensubsystem in einen hochgefahrenen Zustand (2); Übertragen der Steuerung des Benutzerschnittstellenmittels an das Hochleistungs- Rechensubsystem und Ausführen der Software (24, 20, 2, 260); alternativ: wenn kein Bedarf an hoher Rechenleistung besteht (26), Übertragen der Steuerung des Benutzerschnittstellenmittels an das Niedrigleistungs-Rechensubsystem und Stoppen der Software (270, 27); und wenn die niedrige Rechenleistung ausreichend ist, Versetzen des Hochleistungs-Rechensubsystems in einen Energiesparmodus, wodurch es in den Wartezustand mit niedrigem Energieverbrauch gelangt (280, 28, 2). 21. Verfahren nach Anspruch, gekennzeichnet durch, wahlweise, Eintreten in einen Standby-Zustand (290), wenn eine Inaktivitäts- Zeitüberschreitung (289) auftritt, und Zurückkehren in den Wartezustand mit niedrigem Energieverbrauch (2) bei einem Aufwachereignis (291). 22. Verfahren nach Anspruch, gekennzeichnet durch Stoppen der Software und Speichern eines Wiedereintrittspunkts auf einem der Subsysteme - einem ersten Subsystem - durch das Ausführen einer ersten Prozedur auf dem ersten Subsystem, umfassend folgende Schritte: Sammeln von Informationen über einen ersten Zustand der Software auf dem ersten Subsystem, umfassend zugeteilte Ressourcen (0), Speichern der Informationen über den ersten Zustand auf einem Speichermittel, das von beiden Subsystemen gemeinsam genutzt wird (3), Schließen der Software auf dem Subsystem, umfassend das Freigeben von Speicher (3), und Versetzen des ersten Subsystems in einen passiven Energiesparzustand. 23. Verfahren nach Anspruch, gekennzeichnet durch das Starten der Software von einem definierten Startpunkt auf einem der Subsysteme, das nicht das erste Subsystem ist - einem zweiten Subsystem - durch das Ausführen einer zweiten Prozedur auf dem zweiten Subsystem, umfassend folgende Schritte: Abrufen der gespeicherten Informationen über den ersten Zustand der Software von dem gemeinsam genutzten Speichermittel (3), Starten der Software auf dem zweiten Subsystem, umfassend das Zuteilen von Ressourcen gemäß den gespeicherten Zustandsinformationen (3), Erstellen eines zweiten Zustands auf dem zweiten Subsystem entsprechend den Informationen über den ersten Zustand (), Speichern der Informationen über den zweiten Zustand auf dem Speichermittel, das von beiden Subsystemen gemeinsam genutzt wird (360). 24. Verfahren nach Anspruch 22 oder 23, dadurch gekennzeichnet, dass Teile der Zustandsinformationen auf dem Speichermittel dynamisch geändert werden, wenn dieser Teil der Zustandsin-

11 19 EP B1 formationen geändert wird. 2. Verfahren nach Anspruch 22 oder 23, dadurch gekennzeichnet, dass Teile der Zustandsinformationen auf dem Speichermittel fortlaufend aktualisiert werden, wenn das Betriebssystem aktiv ist. 26. Verfahren nach Anspruch 22 oder 23, dadurch gekennzeichnet, dass Teile der Zustandsinformationen auf dem Speichermittel fortlaufend aktualisiert werden, wenn die Systemressourcen für das Ausführen von Hintergrundaufgaben verfügbar werden. Revendications 1. Système de traitement de données caractérisé par : un sous-système informatique haute performance présentant un premier processeur, un sous-système informatique faible performance présentant un deuxième processeur indépendant dudit premier processeur, et ledit soussystème informatique faible performance présente une consommation d énergie inférieure et des performances de calcul inférieures à celles dudit sous-système informatique haute performance, et un dispositif de commande couplé audit soussystème informatique haute performance et audit sous-système informatique faible performance ; ledit sous-système informatique faible performance : (i) étant configuré pour être commandé par ledit dispositif de commande et (ii) étant configuré pour : initialiser en passant d une étape initiale de mise hors tension (0) à une étape de mise sous tension (), tout en maintenant ledit sous-système informatique haute performance hors tension (2), puis passer (21) à un état d attente à faible puissance (2), passer, lors d une période d inactivité (289), à un état de veille (290) ; revenir, lors d un événement de réveil (291), audit état d attente à faible puissance (2) ; et (iii) étant configuré pour commander audit système de traitement de données d agir comme un dispositif informatique unique en déplaçant l exécution logicielle vers un des sous-systèmes suivants : ledit sous-système informatique haute performance lorsque des performances de calcul élevées sont nécessaires (22) en initialisant ledit sous-système informatique haute performance (2, 23) pour le faire passer à un état initialisé (2), en transférant la commande du moyen d interface utilisateur vers ledit sous-système informatique haute performance et en exécutant ledit logiciel (24, 20, 2, 260), ou ledit sous-système informatique faible performance lorsque des performances de calcul faibles sont suffisantes, en transférant la commande du moyen d interface utilisateur vers ledit sous-système informatique faible performance et en arrêtant ledit logiciel (270, 27) ; et si lesdites performances de calcul faibles sont suffisantes, placer ledit sous-système informatique haute performance en mode d économie d énergie, passant ainsi audit état d attente à faible puissance (280, 28, 2). 2. Système de traitement de données selon la revendication caractérisé en ce que ledit sous-système informatique faible performance effectue au moins une tâche même lorsque ledit sous-système informatique haute performance exécute activement ledit logiciel. 3. Système de traitement de données selon la revendication caractérisé en ce que ledit système de traitement de données conserve ladite interface utilisateur et une utilisation de dispositifs périphériques quels que soient lesdits sous-systèmes sur lesquels ledit logiciel est exécuté. 4. Système de traitement de données selon la revendication caractérisé en ce que lesdits sous-systèmes utilisent des systèmes d exploitation adaptés à leurs performances de calcul respectives.. Système de traitement de données selon la revendication caractérisé en ce que lesdits sous-systèmes comprennent leurs propres moyen de traitement principal, moyen de traitement graphique et moyen de stockage. 6. Système de traitement de données selon la revendication caractérisé en ce qu un moyen d affichage est commandé par : ledit sous-système informatique faible perfor- 11

12 21 EP B1 22 mance lorsque que ledit sous-système informatique haute performance est dans ledit état d économie d énergie, et ledit sous-système informatique haute performance lorsque que ledit sous-système informatique haute performance exécute ledit logiciel. 7. Système de traitement de données selon la revendication caractérisé en ce qu au moins une liaison de communication relie ledit sous-système informatique haute performance audit sous-système informatique faible performance. 8. Système de traitement de données selon la revendication ou 7, caractérisé en ce que ladite liaison de communication permet ladite connexion à un concentrateur d entrée/sortie sur ledit système informatique haute performance. 9. Système de traitement de données selon la revendication 8, caractérisé en ce que des dispositifs périphériques sont partagés en utilisant ladite liaison de communication.. Système de traitement de données selon la revendication caractérisé en ce que lesdits sous-systèmes partagent un système d entrée/sortie de base. 11. Système de traitement de données selon la revendication caractérisé en ce qu une décision déterminant dans lequel desdits sous-systèmes ladite exécution dudit logiciel sera déplacée, est indiquée par un commutateur qui est au moins un des éléments suivants : une alimentation et un moyen d interface utilisateur nécessaires) un système de traitement de données autonome. 14. Système de traitement de données selon la revendication caractérisé en ce que ledit sous-système faible performance est utilisé pour au moins un des protocoles multitâches et serveur/client dans ledit système de traitement de données, en exécutant des tâches pour le compte dudit sous-système informatique haute performance. 1. Système de traitement de données selon la revendication caractérisé en ce que ledit sous-système informatique faible performance agit comme un processeur esclave pour ledit sous-système informatique haute performance. 16. Système de traitement de données selon la revendication caractérisé en ce que ledit sous-système informatique faible performance est conçu pour prendre en charge des tâches «toujours actives». 17. Système de traitement de données selon la revendication 16, caractérisé en ce que lesdites tâches «toujours actives» comprennent des pilotes pour l entrée/sortie radio, des applications audio, des fonctions de réveil. 18. Système de traitement de données selon la revendication caractérisé en ce que ledit sous-système informatique faible performance agit comme un serveur pour ledit sous-système informatique haute performance. un commutateur physique, un sélecteur en tant que partie de ladite interface utilisateur sur ledit moyen d affichage, et un résultat d évaluation d un ensemble de facteurs prédéterminés internes audit système de traitement de données Système de traitement de données selon la revendication caractérisé en ce que ledit système de traitement de données est basé sur une architecture «logique de noyau» et ledit dispositif de commande fait partie de ladite logique de noyau. 12. Système de traitement de données selon la revendication 1 caractérisé en ce que ledit commutateur est conçu pour changer une connexion de dispositifs périphériques audit sous-système, ledit sous-système étant indiqué pour exécuter ledit logiciel. 13. Système de traitement de données selon la revendication 12, caractérisé en ce que ledit sous-système informatique faible performance peut être séparé dudit système de traitement de données, fournissant (avec 0. Procédé pour coordonner un sous-système informatique faible performance et un sous-système informatique haute performance dans un système de traitement de données afin de déplacer de manière transparente un logiciel devant être exécuté entre lesdits sous-systèmes, entraînant lesdits sous-systèmes à agir comme un dispositif informatique unique, le procédé étant caractérisé par les étapes suivantes : commander audit sous-système informatique faible performance : 12

13 23 EP B1 24 d initialiser, dans une étape initiale, en utilisant un deuxième processeur dudit soussystème faible performance, en passant d une étape de mise hors tension (0) à une étape de mise sous tension (), tout en maintenant ledit sous-système informatique haute performance hors tension (2), ledit sous-système haute performance présentant un premier processeur indépendant dudit deuxième processeur ; de passer (21) à un état d attente à faible puissance (2) ; lors d une période d inactivité (289), de passer à un état de veille (290) ; de revenir, lors d un événement de réveil (291), audit état d attente à faible puissance (2) ; et lorsque des performances de calcul élevées (22) sont nécessaires, d initialiser ledit sous-système informatique haute performance (2, 23) en passant à un état initialisé (2) ; de transférer la commande du moyen d interface utilisateur vers ledit sous-système informatique haute performance et d exécuter ledit logiciel (24, 20, 2, 260) ; en variant : lorsque des performances de calcul élevées sont nécessaires (22), de transférer la commande dudit moyen d interface utilisateur vers ledit soussystème informatique faible performance et d arrêter ledit logiciel (270, 27) ; et si lesdites performances de calcul faibles sont suffisantes, de placer ledit sous-système informatique haute performance en mode d économie d énergie, passant ainsi audit état d attente à faible puissance (280, 28, 2). 21. Procédé selon la revendication, caractérisé, en variante, par le passage à un état de veille (290) lors d une période d inactivité (289) et par le retour audit état d attente à faible puissance (2) lors d un événement de réveil (291). 22. Procédé selon la revendication, caractérisé par l arrêt dudit logiciel et la sauvegarde d un point de retour sur un desdits sous-systèmes (un premier sous-système) en exécutant une première procédure sur ledit premier sous-système comprenant les étapes suivantes : rassembler des informations concernant un premier état dudit logiciel sur ledit premier soussystème comprenant des ressources attribuées (0), stocker lesdites informations du premier état dans un moyen de stockage partagé par les deux sous-systèmes (3), fermer ledit logiciel sur ledit sous-système comprenant la libération de mémoire (3), et placer ledit premier sous-système dans un état d économie d énergie passif. 23. Procédé selon la revendication, caractérisé par le démarrage dudit logiciel à partir d un point de démarrage défini sur un desdits soussystèmes qui n est pas ledit premier sous-système (un deuxième sous-système) en exécutant une deuxième procédure sur ledit deuxième sous-système comprenant les étapes suivantes : extraire lesdites informations stockées, concernant ledit premier état dudit logiciel, dudit moyen de stockage partagé (3), démarrer ledit logiciel sur ledit deuxième soussystème comprenant l attribution de ressources conformément auxdites informations d état sauvegardées (3), établir un deuxième état sur ledit deuxième sous-système correspondant auxdites informations du premier état (), sauvegarder lesdites informations du deuxième état dans ledit moyen de stockage partagé par les deux sous-systèmes (360). 24. Procédé selon la revendication 22 ou 23, caractérisé en ce que des parties desdites informations d état sur ledit moyen de stockage sont changées de manière dynamique, lorsque ladite partie desdites informations d état est changée. 2. Procédé selon la revendication 22 ou 23, caractérisé en ce que des parties desdites informations d état sur ledit moyen de stockage sont mises à jour de manière séquentielle lorsque ledit système d exploitation est en cours de traitement. 26. Procédé selon la revendication 22 ou 23, caractérisé en ce que des parties desdites informations d état sur ledit moyen de stockage sont mises à jour de manière séquentielle lorsque lesdites ressources du système deviennent disponibles pour exécuter des tâches d arrière-plan. 13

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