US 2016/0077931 A1 · FILTERING EVENT LOG ENTRIES

Abstract

Efficient logging in a control system. Register update requests to store data values in one or more of a plurality of primary registers are received. The most frequently updated primary registers of the plurality of primary registers are periodically identifying. A shadow register is associated with each of the identified most frequently updated primary registers. In response to receiving a register update request to store a data value in one of the most frequently updated primary registers, it is determined if the data value to store is different than the data value stored in the shadow register associated with the register to update. If so, the data value to store is stored into the register to update, stored into the shadow register associated with the register to update, and a log entry corresponding to the register update request is stored in an event log file.

Claims13

Dependent claims

A method for efficient logging in a control system, the method comprising:

receiving register update requests to store data values in one or more of a plurality of primary registers;
periodically identifying the most frequently updated primary registers of the plurality of primary registers;
associating a shadow register with each of the identified most frequently updated primary registers;
in response to receiving a register update request to store a data value in one of the most frequently updated primary registers:
determining if the data value to store is different than the data value stored in the shadow register associated with the register to update;
in response to determining that the data value to store is different than the data value stored in the shadow register associated with the register to update:
storing the data value to store into the register to update;
storing the data value to store into the shadow register associated with the register to update;
and
storing, in an event log file, a log entry corresponding to the register update request.

7 more elements

A computer system for efficient logging in a control system, the computer system comprising:

one or more computer processors, one or more computer-readable storage media, and program instructions stored on one or more of the computer-readable storage media for execution by at least one of the one or more processors, the program instructions comprising:
program instructions to receive register update requests to store data values in one or more of a plurality of primary registers;
program instructions to periodically identify the most frequently updated primary registers of the plurality of primary registers;
program instructions to associate a shadow register with each of the identified most frequently updated primary registers;
program instructions, in response to receiving a register update request to store a data value in one of the most frequently updated primary registers, to:
determine if the data value to store is different than the data value stored in the shadow register associated with the register to update;
in response to determining that the data value to store is different than the data value stored in the shadow register associated with the register to update, to:
store the data value to store into the register to update;
store the data value to store into the shadow register associated with the register to update;
and
store, in an event log file, a log entry corresponding to the register update request.

8 more elements

A computer program product for efficient logging in a control system, the computer program product comprising:

one or more non-transitory computer-readable storage media and program instructions stored on the one or more non-transitory computer-readable storage media, the program instructions comprising:
program instructions to receive register update requests to store data values in one or more of a plurality of primary registers;
program instructions to periodically identify the most frequently updated primary registers of the plurality of primary registers;
program instructions to associate a shadow register with each of the identified most frequently updated primary registers;
program instructions, in response to receiving a register update request to store a data value in one of the most frequently updated primary registers, to:
determine if the data value to store is different than the data value stored in the shadow register associated with the register to update;
in response to determining that the data value to store is different than the data value stored in the shadow register associated with the register to update, to:
store the data value to store into the register to update;
store the data value to store into the shadow register associated with the register to update;
and
store, in an event log file, a log entry corresponding to the register update request.

8 more elements

Dependencies are inferred from the claim text.

Filtering event log entries

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Filtering event log entries

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Abstract

Claims13