41 results about "Non-maskable interrupt" patented technology

The embodiment of the invention provides a patching method and a patching device under multi-core environment; the patching method comprises the steps of sending internuclear non-maskable interrupt to each target-virtual CPU of a shared code segment target-virtual CPU group so as to cause the target-virtual CPUs to respond to the internuclear non-maskable interrupt and enter a patching synchronization state, monitoring the patching synchronization state of the target-virtual CPUs, changing the first command of the patched primitive function of the target-virtual CPUs into an abnormal command after all target-virtual CPUs enter the patching synchronization state, and outputting an notice on the finishing of the patching synchronization state to all target-virtual CPUs so as to shift the patched primitive function to a new patching function while the patched primitive function is executed to an abnormity handling process triggered by the abnormal command. The method and the device adopt the synchronous mode of internuclear non-maskable interrupt to realize the patching synchronous activation of the target-virtual CPUs of the shared code segment and realize the complete effectiveness of patches during the abnormal handling process.

The invention discloses a computing system such as a computer, a Personal Digital Assistant, or a mobile phone, being connected both to an internal network and an external network and being able to quickly and safely switch therebetween without being shut down while ensuring a physical separation between the two networks. When a user inputs a request of switching, a switching unit will set a trigger thereof and generate a consequent non-maskable interrupt to CPU. After receives the NMI, the CPU controls the switching unit to run a switch program kept therein to back up a current status of the system. Then the switch program backs up a current status, controls the switching unit to interrupt all serving programs and loads the other status other than the current status to the computing system, and finally control the switching unit to reset the trigger.

A processor of an aspect includes a decode unit to decode an exception handler return instruction. The processor also includes an exception handler return execution unit coupled with the decode unit. The exception handler return execution unit, responsive to the exception handler return instruction, is to not configure the processor to enable delivery of a subsequently received nonmaskable interrupt (NMI) to an NMI handler if an exception, which corresponds to the exception handler return instruction, was taken within the NMI handler. The exception handler return execution unit, responsive to the exception handler return instruction, is to configure the processor to enable the delivery of the subsequently received NMI to the NMI handler if the exception was not taken within the NMI handler. Other processors, methods, systems, and instructions are disclosed.

Methods and computer-executable components for real-time scheduling of CPU resources are disclosed. A performance counter determines when to allocate CPU resources to a thread. When it is time to allocate the CPU resources, the performance counter issues a non-maskable interrupt to an advanced programmable interrupt controller (APIC). The APIC then issues a non-maskable interrupt to the CPU. In response to receiving the non-maskable interrupt, the CPU allocates resources to the thread.

The invention discloses a method and device for executing non-maskable interrupt. The method comprises the following steps: obtaining a safe interrupt request under an unsafe mode and interrupting the operation of an operating system OS, wherein the safe interrupt request is non-maskable; entering a safe mode through the safe interrupt request, and storing the interrupt context of the OS state when the operation of the OS is interrupted under the safe mode; returning to the unsafe mode to execute user defined processing; after the user defined processing is finished, entering the safe mode again and restoring the OS state according to the interrupt context under the safe mode; and returning to the unsafe mode again and continuing to execute the operation of the OS. According to the method and device for executing non-maskable interrupt, the NMI can be simply realized without hardware.

A system and method for handling shared resource writes arriving via non-maskable interrupts in single thread non-mission critical system with limited memory space includes a queue for providing temporary storage of a write request. The queue is accessible by lower or higher priority processes for the servicing of the write requests. Upon completion of service to the write requests the system returns control to the standard operations of the single thread system.

The invention provides an operation system performance analysis method and device. The method comprises the following steps: when a preset event in an operation system enables a performance counter in a central processing unit (CPU) to overflow, triggering to generate non maskable interrupt (NMI); during the interruption period of the NMI, sampling progress parameter of the CPU to obtain samplingdata; according to a process identification in the sampling data, acquiring command information of the current progress corresponding to the process identification; according to the command information, carrying out classified statistic on the sampling data to obtain statistic information; and according to the statistic information, analyzing the performance of the operation system. In the invention, the progress parameter is sampled when the preset event happens to obtain the statistical information for analysis, so that factors causing performance bottlenecks can be known under the condition of no error log, thereby improving the quality and efficiency of the operation system performance analysis.

The invention discloses a method and device for on-site location and processing of software errors, and relates to the technical field of embedded systems. The digital signal processing unit with a software error sends a processor status normal notification message to the central processing unit, and performs normal operation; the digital signal processing unit that detects a software error enters a non-maskable interrupt, and stops sending the processor to the central processing unit. Status normal notification message. In the present invention, while the processor self-detects software errors, other processors in the system are used to jointly detect software errors, thereby improving the detection probability of software errors.

Embodiments of the present application disclose a linux kernel processing method and apparatus, the method comprising steps acquiring a non-maskable interrupt NMI, obtaining debugging information of the linux kernel in response to the interrupt, and/or executing a preset operation on the linux kernel in response to the interrupt. Since NMI is an interrupt that cannot be masked by the processor, the processor can still obtain NMI interrupt when system exception occurs due to code failure in kernel state. In response to NMI, the processor can obtain debug information of the linux kernel and/or perform preset operation on the linux kernel. Through analyzing the debugging information of Linux kernel, we can get the debugging mode of kernel state code, in order to realize the debugging of kernel state code, the kernel of linux can be adjusted by executing the preset operation on the kernel of linux, so as to alleviate the influence of code failure on the kernel of linux, facilitate the acquisition of debugging information and the debugging of kernel state code, and improve the stability of the kernel of linux.

Systems, apparatuses, and methods for intentionally delaying servicing of interrupts in a computing system are disclosed. A computing system includes a processor that services interrupts generated by components of the computing system. An interrupt controller detects a received interrupt and intentionally delays servicing of the interrupt depending on various conditions. If the interrupt is a first type of interrupt and the processor is in a first power state, servicing of the interrupt is delayed by a first period of time. If the interrupt corresponds to the first type of interrupt and the processor is in a second power state, servicing of the interrupt is delayed for a period of time that is longer than the first period of time. If a non-maskable interrupt is received before expiration of either the first or second period of time, then servicing of any previously delayed interrupts is allowed to proceed.

The invention discloses a system for improving a bus access error based on RISC-V architecture. The system comprises an abnormal priority control module, an interrupt control module and a skip controlmodule. The system distributes interrupt numbers for the bus access error, takes the bus access error as interrupt sources for processing, and the abnormal priority control module is used for carrying out priority ranking on all abnormal types, selecting an abnormal type with the highest current priority and outputting the selected abnormal type to the skip control module; the interrupt control module is used for carrying out unified management on the bus access error and other interrupt sources, selecting the interrupt source with the highest current priority and outputting the interrupt source to the skip control module; and the skip control module is used for analyzing and processing input abnormal types, interrupt sources and unshielded interrupts and outputting analyzed and processedsignals to the processor core. According to the invention, abnormity report is changed to interrupt report for the bus access error, so that software control can be facilitated.

A conversion transmission circuit of a non-maskable interrupt request is used to transmit the non-maskable interrupt request among a south bridge, a BMC, a first chip and an IOH of a central processor, which comprises a switch, an electrical level conversion module and a logic and electrical level conversion module, wherein the switch comprises a first end, a control end and a second end, the first end is grounded, the control end is coupled with the south bridge for receiving the control of the non-maskable interrupt request of the south bridge to conduct or cut off the first end and the second end. The electrical level conversion module comprises a first diode and a second diode, wherein the first diode is respectively coupled with the second end and a first power supply voltage through a first resistance after connecting with the positive electrode of the second diode, the negative electrode of the first diode is respectively coupled with the BMC and is coupled with the grounding voltage through a second resistance, and the negative electrode of the second diode is respectively coupled with the first chip and is coupled with the ground through a third resistance. The logic and electrical level conversion module is used to reversely transmit the signal of the input end to output, and makes the high electrical level to be in accordance with the electrical level of a second power supply voltage.

It is a method to store the abnormal state information of the control system, which comprises the following steps: to set at least two degrees of counter in the watchdog system, and when the counter reaches the front degree value, the system triggers the non-shielding interval; the system stores the information easy to loose of the control system by use of the non-shielding interval; when the counter reaches the back degree value, the system triggers the reset signal to reset the control system.

The invention discloses a kernel soft deadlock processing method and device, equipment and a storage medium. The method comprises the following steps of distributing a watchdog thread for each CPU (Central Processing Unit), and judging whether an operating system operated by the CPU has kernel soft deadlock or not according to the watchdog thread; if the kernel soft deadlock exists, determining a target process for triggering the kernel soft deadlock, and calling non-maskable interrupt; and reducing the priority of the target process by using the non-maskable interrupt, so that the operating system processes the kernel soft deadlock by re-running the watchdog thread. Whether kernel soft deadlock occurs in the operating system or not is detected through the watchdog thread, if it is detected that kernel soft deadlock occurs, the priority of the target process triggering the kernel soft deadlock is lowered after the non-maskable interrupt is called, and therefore the operating system processes the kernel soft deadlock by running the watchdog thread again. According to the method, the problem of soft deadlock of the kernel in operation of the operating system is automatically repaired, and the use experience of a user is improved.

The invention discloses a method for expanding the addressing capability of a 8051 serial singlechip. A logic address of an access data region of the 8051 serial singlechip is divided into four units 16K byte in size to obtain four logic address fields; a logic address of an access code region of the 8051 serial singlechip is divided into four units 16K byte in size to obtain four logic address fields; and the eight logic address fields can be mapped to/on any position of a 1M physical address space. The valid length of each logic address field can be configured, and when the operation exceeds the valid length of the logic address field, interruption which can not be shielded is generated. By using the method for expanding the addressing capability of the 8051 serial singlechip, the addressing capability of the data region and the code region can be effectively expanded, and the application and flexibility are increased.