An embedded system log recording method and log recording system

Abstract

The invention discloses an embedded system log recording method and a log recording system. The method comprises the steps that a link configuration file is modified, a virtual address field, namely, an str address field, is set in a bin file, character string information in a log is put into the str address field, instructions, except the character string information, in the log are put into an iram address field, and data in the log is put into a dram address field; a virtual address of the character string information and variable values in the log are output. According to the embedded system log recording method and the log recording system, the character string information is put into the str address field, an ram space of the embedded system is not occupied, and the cost is greatly reduced; only the virtual address of the character string information and the variable values in the log are output, the interface data volume is decreased, loads of a system CPU and peripheral interfaces are reduced, and the service execution efficiency of the whole system is improved.

Description

technical field [0001] The invention relates to an embedded system log recording method and a log recording system. Background technique [0002] In embedded systems, logging is essential, and the existing logging solutions such as figure 1 shown. In an embedded system, when a log needs to be output, the CPU will combine the data content in Iram and Dram into a complete log message, such as "Invalid Power State: 0xFF", and then output the log information through the log output interface (serial port, network port, etc.) ) is transmitted to the log display terminal, and the corresponding log is finally displayed on the log display terminal. [0003] The existing technology is to output the complete log information through the interface, so taking the above log information as an example, the fixed string information of "Invalid Power State: 0x" should be stored in the ram of the embedded system, and at the same time Store the output variable value FF, the storage of the var...

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Problems solved by technology

[0003] The existing technology is to output the complete log information through the interface, so taking the above log information as an example, the fixed string information of "Invalid Power State: 0x" should be stored in the ram of the embedded system, and at the same time Store the output variable value FF, the storage of the variable only needs 1 byte, and the corresponding string information will occupy 22 bytes, the fixed string takes up a lot of space, and in the embedded system The internal storage space is precious and limited, especially the size of the internal ram in the ASIC chip is closely related to the cost of the chip, so the internal RAM in the ASIC chip is generally very limited. Generally, the space occupied by these string information occupies more than the program About 20% of the total space, it is very unreasonable from the perspective of cost to use very limited ram to store these string information that is fixed and takes up a lot of space; It will also be transmitted, which will occupy considerable peripheral interface resources and CPU computing resources. When the peripheral interface is slow, such as a serial port, a large amount of log information may affect the normal business of the embedded system and reduce the business of the entire system. Execution efficiency, because the function of the log system affects the normal business of the entire system, which is also unacceptable

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