Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Renault

Renault S.a.s.

Raphaël David

Nicolas Ventroux

Vincent David

Thierry Collette

Stéphane Louise

Frédéric Blanc

Michel Harrand

Jean-Marc Philippe

Alexandre Carbon

Yves Lhuillier

Laurent Le Garff

Farhat Thabet

David Vincent

Robert Faure

Laurent Forgeot

Jean-Yves Stineau

The electronic architecture carries out the management of the functions of a vehicle, the functions being implemented via a set of sensors and actuators, the architecture comprising at least: a central computer; a real-time communication network; a set of interface modules, each module: aggregating signals from at least one of the sensors and sending the signals to the central computer via the communication network; and/or distributing control signals to at least one of the actuators; the central computer driving the actuators according to the signals from the sensors, the control signals for the actuators being sent to the interface modules via the communication network.

Electronic architecture for onboard system

A device and method for synchronizing tasks executed in parallel on a platform comprising comprises several computation units. The tasks are apt to be preempted by the operating system of the platform, and the device comprises at least one register and one recording module installed in the form of circuits on said platform, said recording module being suitable for storing a relationship between a condition to be satisfied regarding the value recorded by one of said registers and one or more computation tasks, the device comprising a dynamic allocation module installed in the form of circuits on the platform and configured to choose a computation unit from among computation units of the platform when said condition is fulfilled, and for launching the execution on the chosen computation unit of a software function for searching for the tasks on standby awaiting the fulfillment of the condition and notifications of said tasks.

Device and method for synchronizing tasks executed in parallel on a platform comprising several calculation units

A system including a plurality of processing units for executing tasks in parallel and a communication network. The processing units are organized into clusters of units, each cluster comprising a local memory. The system includes means for statically allocating tasks to each cluster of units, so that a task of an application is processed by the same cluster of units from one execution to another. Each cluster includes cluster management means for allocating tasks to each of its processing units and space in the local memory for executing them, so that a given task of an application may not be processed by the same processing unit from one execution to another. The cluster management means includes means for managing the tasks, means for managing the processing units, means for managing the local memory and means for managing the communications involving its processing units. The management means operate simultaneously and cooperatively.

Statically allocating set of tasks to particular cluster and dynamically allocating each task to different processing units within cluster

In a device for managing data buffers in a memory space distributed over a plurality of memory elements, the memory space is allocatable by memory pages, each buffer including one or more memory pages. The buffers are usable by at least one processing unit for the execution of an application, the application being executed by a plurality of processing units executing tasks in parallel. The memory elements are accessible in parallel by the processing units. The device includes means for allocating buffers to the tasks during the execution of the application and means for managing access rights to the buffers. The means for managing the access rights to the buffers include means for managing access rights to the pages in a given buffer, to verify that writing to a given page does not modify data currently being read from the page or that reading from a given page does not access data currently being written to the page, in such a way as to share the buffer between unsynchronized tasks.

Device for managing data buffers in a memory space divided into a plurality of memory elements

The system for conducting intensive multitask and multistream calculation in real time comprises a central processor core (SPP) for supporting the system software and comprising a control unit (ESCU) for assigning threads of an application, the non-critical threads being run by the central processor core (SPP), whereas the intensive or specialized threads are assigned to an auxiliary processing part (APP) comprising a set of N auxiliary calculation units (APU, . . . , APUN-) that are optimized for fast processing of certain operations, a memory space (SMS) shared by the auxiliary calculation units (APU, . . . , APUN-) via an internal network and a unit (ACU) for controlling and assigning the auxiliary resources. The various elements of the system are arranged in such a manner that communication between the various auxiliary calculation units (APU, . . . , APUN-) or between those auxiliary calculation units (APU, . . . , APUN-) and the central processor core (SPP) is effected via the shared memory space (SMS) and the internal network.

Method and system for conducting intensive multitask and multiflow calculation in real-time

An allocation and control unit for allocating execution threads for a task to a plurality of auxiliary processing units and for controlling the parallel execution of said execution threads by said auxiliary processing units, the task being executed in a sequential manner by a main processing unit. The allocation and control unit includes means for managing auxiliary logical processing units, means for managing auxiliary physical processing units each corresponding to an auxiliary processing unit, and means for managing the auxiliary processing units. The means for managing the auxiliary processing units include means for allocating an auxiliary logical processing unit to an execution thread to be executed, and means for managing the correspondence between the auxiliary logical processing units and the auxiliary physical processing units. The auxiliary processing units execute in parallel the execution threads for the task by way of the auxiliary logical processing units, which are allocated as late as possible and freed as early as possible.

Allocation and control unit for controlling parallel execution of threads on auxiliary processing units

A structure and a method for backing up and restitution of data allowing management of a memory space. The backup and restitution structure includes a matrix of connectors distributed in line and in column, on said matrix. Each connector of one line is connected to its two adjacent connectors. Each connector of one column is connected to its two adjacent connectors. Each line of connectors is connected to a memory of the first-in, first-out type, by a connector situated at one end of the line. Each column of connectors is connected to an input and, or output port of a data stream of the structure by a connector situated at one end of the column. Each connector propagates a data stream. An embodiment is suitable for an onboard computing system including a component, associating a computing structure and a memory space produced for example on one electronic circuit board.

Growing community of inventors

Bures sur Yvette, France

Raphaël David