Time processing device and data processing system including time processing device
A data processing system and time data technology, which is applied in electrical digital data processing, signal generation/distribution, instruments, etc., and can solve problems such as reduced accuracy, preemption, and excessive delay.
Active Publication Date: 2021-04-23
BAIDU USA LLC
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- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Unfortunately, the more instructions that must be executed, the more delays will be incurred, resulting in less accuracy
Also, the more software involved, the more vulnerable it is to preemption by the operating system (OS) scheduler, causing further delays
Method used
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Embodiment Construction
[0030] Embodiments and aspects of the invention will be described with reference to details discussed below, and the accompanying drawings will illustrate the various embodiments. The following description and drawings are illustrative of the present invention and are not to be construed as limiting the present invention. Numerous specific details are described in order to provide a thorough understanding of various embodiments of the invention. However, in certain instances, well known or conventional details are not described in order to provide a concise discussion of embodiments of the invention.
[0031] Reference in the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present invention. The appearances of the phrase "in one embodiment" in various places in the specification do not necessarily all refer to the sam...
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A data processing system and a time processing device are provided. In one embodiment, a dedicated time handling device plugs into a peripheral bus coupled to or embedded with at least a portion of the remaining system components (eg, processor, memory) of the data processing system to synchronize the system clock of the data processing system. The peripheral bus may be a Peripheral Component Interface (PCI) bus, a PCI Express (PCIe) link, a PCI Extended (PCI‑X) bus, or the like. The time handling device receives high precision time from a high precision time source such as a Global Positioning System (GPS) time source. The time processing device decodes and processes the received time, and stores the time in an internal time register. The time handling device also includes an interface that allows an external component (eg, a processor) to retrieve with low latency the time stored in the time register for the purpose of synchronizing the system clock.
Description
technical field [0001] Embodiments of the invention generally relate to time synchronization of data processing systems. More specifically, embodiments of the invention relate to high precision time synchronization of data processing systems. Background technique [0002] One of the challenges in the embedded world is keeping track of extremely precise time. Time is universal and constant throughout all devices on or near Earth. Keeping track of time accurately will allow distributed systems to maintain synchronization naturally. The Network Time Protocol (NTP) is a mechanism that allows a network-connected computer or device to retrieve the time from an NTP server across the network. If an NTP server can maintain microsecond precision, computers will achieve millisecond precision due to unpredictable network delays. [0003] Special purpose devices, such as those used to implement NTP servers, are not of general use. Such specialized equipment is usually very expensive...
Claims
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IPC IPC(8): G06F13/42
CPCG06F13/4295G06F2213/0024G06F2213/0026G06F1/14G06F9/4406
Inventor 韦斯利·邵维维克·苏拉比
Owner BAIDU USA LLC