Nasdaq Technology Ab

Omx Technology Ab

Hakan Winbom

Control circuitry controls the operations of a central processing unit, CPU, which is associated with a nominal clock frequency. The CPU is further coupled to an I/O range and configured to deliver input to an application. The control circuitry controls the CPU to poll the I/O range for input to the application. The control circuitry also monitors whether or not each poll results in input to the application and adjusts a clock frequency at which the CPU operates to a clock frequency lower than the nominal clock frequency if a pre-defined number of polls resulting in no input is detected.

Method and devices for controlling operations of a central processing unit

Processing input data at different clock frequencies based on a number of polls of an I/O range for an application detecting input data

Polling an I/O range for data messages for input to and processing at different clock frequencies

A data processing system for processing data messages received from multiple user terminals over one or more data networks includes a processor, an input/output (I/O) range, and multiple processing layers configured to run on the processor. The multiple processing layers include an application layer, including an application, configured when run on the processor to process data messages from the I/O range, a hardware layer configured when run on the processor to communicate with hardware devices including the user terminals, and an operating system kernel layer configured when run on the processor to provide data communications between the application layer and the hardware layer. The application layer can bypass the operating system kernel layer when communicating with the hardware layer to poll the I/O range for data messages for input to and processing by the application.

Control circuitry controls the operations of a central processing unit, CPU, which is associated with a nominal clock frequency. The CPU is further coupled to an I/O range and configured to deliver input to an application. The control circuitry controls the CPU to poll the I/O range for input to the application. The control circuitry also monitors whether or not each poll results in input to the application and adjusts a clock frequency at which the CPU operates to a clock frequency lower than the nominal clock frequency if a pre-defined number of polls resulting in no input is detected. Methods and a central computer server of an automated exchange system are also provided.

Securities are traded at a primary site according to information received from market makers and traders. The information, including quotes and orders for one or more instruments, is received and stored at the primary site and used to create deals in the securities. The deals are also stored at the primary site. A secondary site stores replicas of the orders and deals, but not quote information. The deals stored at the secondary site may be used to update the orders stored at the secondary site.

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Sollentuna, Sweden

Hakan Winbom