21 results about "Exclusive access" patented technology

A system may include: a plurality of processing cores including at least a first processing core and a second processing core; a shared memory communicatively coupled to each of the plurality of processing cores, and accessible by each of the plurality of processing cores; a global monitor communicatively coupled to each of the plurality of processing cores and configured to control exclusive access to the memory by each of the plurality of processing cores; and a software architecture embodied in a non-transitory computer readable medium and configured to divide a plurality of processing tasks between the first processing core and the second processing core when read and executed by the multi-core processor.

The application discloses a configurable read-write priority strategy read-write lock implementation method of an MMU-free embedded real-time operating system, and comprises the following steps: S1, performing strategy binding in a read-write lock creation stage; S2, realizing atomic operation in a middle-off mode; S3, actively eliminating writer starvation in a write priority mode; S4, performing priority inheritance when a write lock is applied; S5, adopting a double-waiting queue separation design; S6, adopting static memory pool zero dynamic allocation; and S7, adopting single-field tri-state encoding to mark a lock state. The configurable read-write priority strategy read-write lock implementation method of the MMU-free embedded real-time operating system realizes lightweight configurable read-write locks of the MMU-free embedded real-time operating system, can support flexible configuration of read / write priority strategies and has zero runtime switching overhead in the whole process, does not need special hardware instructions and MMU context support, and is perfectly compatible with low-end MCUs without exclusive access capability, such as Cortex-M0 / M0+.

This disclosure provides systems, methods, and devices for memory systems that support enhanced exclusive read and write operations and scalable exclusive monitor architectures. In one aspect, device includes a processing system that includes one or more shared memory devices and one or more request nodes. The processing system also includes one or more network interface units (NIUs), each NIU of the one or more NIUs including an exclusive monitor configured to monitor exclusive accesses to shared memory addresses for a corresponding request node. The processing system includes one or more home nodes coupled to a corresponding shared memory device of the one or more shared memory devices. The processing system further includes an interconnect coupled to each NIU and to each home node and configured to couple the one or more request nodes to the one or more shared memory devices. Other aspects and features are also claimed and described.

Atomic memory access across consecutive granule boundaries is supported in a processor-based device. In this regard, the processor-based device includes a plurality of processing elements (PEs), and further includes a special-purpose central ordering point (SPCOP) configured to distribute consecutive granule ("cogran") pair atomic access (CPAA) tokens. To perform an atomic memory access on a cogran pair, a PE must hold a CPAA token for an address block containing one of the cogran pair before the PE can acquire exclusive state on each cogran in the cogran pair. Because a CPAA token must be acquired before exclusive access to at least one of the cogran pair is obtained, and because the SPCOP is configured to allow only one CPAA token to be active for a given address block, deadlock and livelock between PEs seeking access to the same cogran can be avoided.

In an aspect, an apparatus comprises a writer agent, wherein the writer agent may obtain exclusive access to at least one coherence granule of shared memory with respect to one or more other agents. The writer agent may mark, at the writer agent, completion of a store of the at least one coherence granule prior to receipt of data for the at least one coherence granule from the shared memory. The writer agent may receive the data from the shared memory for the at least one coherence granule. The writer agent may store the data at a local cache of the writer agent. The writer agent may modify the data at the writer agent.

The application discloses a self-service check-in equipment counter mode adaptive detection switching method and system, relates to the technical field of check-in equipment, and comprises the following steps: defining multiple counter service modes in the central processing unit of the self-service check-in equipment, wherein the counter service modes have mutually exclusive access conditions and exit conditions; collecting multi-dimensional state signals of an air information host, a programmable logic controller, an application execution agent and a passenger interactive terminal; performing hierarchical priority mode trigger judgment on the multi-dimensional state signals, sequentially responding to safety events, air information host instructions, equipment and business states and passenger interactive behaviors, and determining a target counter service mode; after safety verification and process cleaning steps before mode switching, performing mode switching of the target counter service mode; and after completing the mode switching, synchronously updating man-machine interactive interfaces and external system state information. The application improves the autonomy, safety and service continuity of the self-service check-in system.

The invention discloses WiFi (Wireless Fidelity) equipment, a communication method and system thereof and related equipment. The method comprises the following steps: acquiring a request signal of Zigbee equipment for requesting exclusive access to a shared medium and a corresponding service priority signal; according to a request signal which is transmitted by the Zigbee equipment and is used for requesting exclusive access to the shared medium and a corresponding service priority signal, the delay tolerance of the Zigbee equipment to a permission signal which is used for indicating permission of exclusive access to the shared medium is acquired; and according to the delay tolerance of the Zigbee equipment to the permission signal for indicating the permission of exclusive access to the shared medium, generating the permission signal for indicating the permission of exclusive access to the shared medium to the Zigbee equipment in time. According to the technical scheme, the communication quality of the Zigbee equipment can be improved.

The invention relates to the technical field of wireless communication of the Internet of Things, in particular to a star communication method and system of the building Internet of Things based on time sequence isolation, and the method comprises the steps: constructing a communication time axis of radio frequency communication, dividing the communication time axis into a plurality of continuous communication cycles, and generating time domain segmentation configuration information of each communication cycle; wherein the time domain segmentation configuration information defines a beacon time period, a control time period, a report time period and a synchronization time period which are arranged in sequence. According to the invention, a communication time axis based on strict time sequence isolation is constructed, the terminal equipment is forced to lock a reporting function in a control time period by issuing a time period control flag bit in a beacon frame, the exclusive access of a control instruction to channel resources is realized, the mechanism eliminates the interference of an uplink data stream to a downlink control instruction, and the performance of the terminal equipment is improved. Uncontrollable delay in the prior art is reduced to deterministic time slot transmission, and the problem that in the prior art, the control success rate is low under high concurrency is effectively solved.

Locking hardware is deployed in conjunction with shared memory. An initial lock request is received by the locking hardware from a first host device to lock a portion of the shared memory, and the locking hardware assigns an initial lock to the first host device, granting it exclusive access to that portion. A second request is received by an independent second host device to lock the same portion of shared memory and is queued by the locking hardware while the initial lock is assigned to the first host device. After the initial lock is released, the locking hardware assigns a second lock to the second host device based on the second request.

A WiFi device and a communication method therefor, a system, and related devices, the method including: acquiring a request signal for requesting exclusive access to a shared medium and a corresponding service priority signal of a Zigbee device; acquiring a delay tolerance of the Zigbee device for a grant signal for indicating that exclusive access to the shared medium is granted, according to the request signal for requesting exclusive access to the shared medium and the corresponding service priority signal transmitted by the Zigbee device; generating the grant signal for indicating that exclusive access to the shared medium is granted to the Zigbee device in a timely manner, according to the delay tolerance of the Zigbee device for the grant signal for indicating that exclusive access to the shared medium is granted. The technical solution of the present disclosure can improve the communication quality of a Zigbee device.

The invention provides a deterministic communication state seamless switching method and system and a deterministic communication state seamless access method and system for an asynchronous cellular network, and belongs to the technical field of 5G-Advanced / 6G mobility management. In order to solve the problems of time sequence breakage, resource mismatch and arbitration interruption of deterministic communication state transition in an asynchronous network, the invention provides a logic time axis cluster and main logic axis migration concept. The network side determines an earliest available resource for the main logic axis service of the target cell through iterative arbitration, and issues a configuration including a switching execution time window; and the user equipment keeps the logic state continuous by adopting a pause-queuing mechanism, completes switching in a time window and recovers deterministic transmission. Meanwhile, the invention provides an enhanced deterministic random access method, each user computes exclusive access resources through absolute time commitment of network broadcast, the base station adopts two-step deterministic arbitration to solve collision and provides a deterministic retry sequence for failed users, and bounded time delay access is realized. According to the invention, the full-process end-to-end hard deterministic service from initial access, service transmission to cross-cell switching is realized, and the interruption time and the signaling overhead are obviously reduced.

This application discloses a trusted data acquisition method based on a trusted platform module, relating to the field of computer security technology. It includes: a trusted data processing driver opening the trusted platform module device file in exclusive mode to obtain exclusive access; through the trusted platform module's desealing operation, the trusted platform module hardware automatically compares the value of the current platform configuration register with the baseline hash value at the time of sealing; if the comparison matches, the trusted platform module releases the key; the trusted data processing driver directly maps the sensor register space through the physical address to read the raw data; at least one environmental characteristic parameter of the external physical environment where the sensor is located is acquired; the raw data and the environmental characteristic parameter are combined to form a trusted data packet and signed using the key. This application solves the technical problems in the prior art, such as the inability to detect tampering before system startup, the risk of man-in-the-middle attacks in the data acquisition path, the inability to prove the correlation between data and the external environment, and the untrustworthiness of software verification, achieving end-to-end trusted verification from the hardware root of trust to sensor data and then to the external physical environment.

In an aspect, an apparatus comprises a writer agent, wherein the writer agent may obtain exclusive access to at least one coherence granule of shared memory with respect to one or more other agents. The writer agent may mark, at the writer agent, completion of a store of the at least one coherence granule prior to receipt of data for the at least one coherence granule from the shared memory. The writer agent may receive the data from the shared memory for the at least one coherence granule. The writer agent may store the data at a local cache of the writer agent. The writer agent may modify the data at the writer agent.

This application discloses a method and system for concurrent access control of diagnostic resources under a hybrid architecture of SOVD and UDS, relating to the field of automotive diagnostic technology. The method includes obtaining SOVD service capability description information, where the service capability description information includes locking indication information extended for at least one diagnostic resource path; receiving a diagnostic resource access request sent by a client; determining whether the target resource requires exclusive access based on the locking indication information corresponding to the target resource path in the service capability description information; if so, querying the resource lock table; if the target resource is not locked, allocating a lock to the client and updating the resource lock table; if the target resource is locked, adding the client to a waiting queue, and allocating the lock after it is released; and releasing the lock and updating the resource lock table after the client completes access. This application can achieve explicit marking of resource locking requirements and dynamic lock management, improving the efficiency and reliability of diagnostic concurrency under a hybrid architecture.

The invention discloses a multi-epitope test resource scheduling method and system based on dynamic priority, and belongs to the technical field of automatic testing. The method comprises the following steps: dividing public resources into a plurality of mutually exclusive access categories; the epitope tasks are classified into public resource tasks and independent tasks; after the table position finishes the task, preferentially executing the currently available longest public task, otherwise, executing the shortest independent task, and otherwise, adding into a waiting queue; when the resources are released, the resources are allocated to the table position with the highest priority in the waiting queue according to the priority of the total duration of the remaining tasks. According to the method, the resource competition waiting time is effectively reduced and the epitope hunger phenomenon is avoided through the strategy that the common task is preferentially long task and the independent task is preferentially short task and in combination with the dynamic priority allocation based on the residual task duration, and the signal interference is avoided through the unified scheduling of wireless resources such as Bluetooth and the like; therefore, the total test time of the multi-epitope test system is remarkably shortened, and the test efficiency and the resource utilization rate are improved.

Accelerating and improved fairness for semaphores is described. In one or more implementations, a computing device includes a plurality of cores and one or more computing resources, exclusive access to which is limited, e.g., to a single core at a time. In one or more implementations, the computing device also includes core selection circuitry configured to identify a first core from the plurality of cores exclusively accessing the one or more limited computing resources and configured to instruct a second core from the plurality of cores to release the exclusive access of the first core to the one or more computing resources.

Accelerating and improved fairness for semaphores is described. In one or more implementations, a computing device includes a plurality of cores and one or more computing resources, exclusive access to which is limited, e.g., to a single core at a time. In one or more implementations, the computing device also includes core selection circuitry configured to identify a first core from the plurality of cores exclusively accessing the one or more limited computing resources and configured to instruct a second core from the plurality of cores to release the exclusive access of the first core to the one or more computing resources.

A neural network processor processes layers of a neural network with a number of processing elements (PEs) configured to operate in lock-step and has a same number of memory zones. During a lock-step cycle, within each memory zone, a first set of zone memories are configured to store neural network layer input data, a second set of zone memories are configured to store neural network layer weights and a third set of zone memories are configured to store neural network layer results. A processing element has exclusive access to (i) a first set of zone memories, (ii) a second set of zone memories and (iii) a third set of zone memories. The sets of zone memories can be in the same or different zones during a lock-step cycle. A data mover has exclusive access to a fourth set of zone memories in each of the memory zones.

Implementations described herein relate to selective data map unit access. A memory device may receive a request from a host device to access a resource associated with a data map unit. The memory device may identify whether the data map unit is in a locked state or an unlocked state. The data map unit may be in the locked state when another host device currently has exclusive access to the resource or may be in the unlocked state when no other host device currently has exclusive access to the resource. The memory device may selectively grant the host device exclusive access to the resource based on identifying whether the data map unit is in the locked state or the unlocked state.

This application discloses a memory manager power-off recovery method and electronic device, relating to the computer field. It achieves exclusive access to memory resources by initiating the process with a persistent trigger signal and combining it with a global mutex lock, ensuring the consistency of core data acquisition. The acquired data is structured and written to a dump file to construct a verifiable persistent carrier. During power-off recovery, the verification results of the dump file are used as a prerequisite to extract data and complete state reconstruction. This solves the technical problems of traditional power-off recovery, such as memory data acquisition being susceptible to concurrent interference, insufficient reliability of dump data, and low accuracy of the recovery process. It provides a structured, highly reliable persistent data source for memory manager power-off recovery, achieving accurate reconstruction of virtual memory regions, free lists, and allocated physical pages, ensuring the integrity of memory data and the normal operation of the memory manager after a power outage.

The application relates to the technical field of non-contact identity verification and access control, and discloses a non-contact intelligent access control method and system for barrier-free access, which comprises the following steps: step 1, obtaining original access observation data and processing the same to obtain a standardized access observation element set; step 2, constructing a single-pass session unit and verifying the same to obtain an effective candidate session; step 3, determining a barrier-free access type and generating a release token; step 4, generating an exclusive access time slot and door control parameters; step 5, performing access release control and updating a state; step 6, performing consistency verification on the single-pass session unit to determine a normal closed session or an abnormal access session; and step 7, generating formal access registration records or abnormal access event records and updating corresponding states. The application realizes closed-loop binding between a non-contact identity verification result, a single-pass session, access release control, actual access verification and access registration records.