International Business Machines Corporation

Sap Se

Martin Doerr

Benedikt Geukes

Manfred Walz

Matteo Michel

Holger Horbach

A system and method for searching for and finding data across industrial time-series data is disclosed executing a series of instructions on a computer system. While executing a first instruction in the series of instructions, the virtual machine receives an interrupt signal. In response to receiving the interrupt signal, the virtual machine searches the series of instructions to identify a second instruction that is a safe point. The virtual machine replaces the second instruction in the series of instructions with one or more interrupt handler instructions that initiate an interrupt handler. The virtual machine resumes execution of the first instruction.

Reduced overhead safepoint mechanism using signals

A scan circuit (JTAG 1149 extension) for a microprocessor utilizes transport logic and scan chains which operate at a faster clock speed than the external JTAG clock. The transport logic converts the input serial data stream (TDI) into input data packets which are sent to scan chains, and converts output data packets into an output data stream (TDO). The transport logic includes a deserializer having a sliced input buffer, and a serializer having a sliced output buffer. The scan circuit can be used for testing with boundary scan latches, or to control internal functions of the microprocessor. Local clock buffers can be used to distribute the clock signals, controlled by thold signals generated from oversampling of the external clock. The result is a JTAG scanning system which is not limited by the external JTAG clock speed, allowing multiple internal scan operations to complete within a single external JTAG cycle.

Method for JTAG-driven remote scanning

Apparatus for JTAG-driven remote scanning

Growing community of inventors

Schwaigern, Germany

Martin Doerr