Abstract: Embodiments of apparatuses, methods, and systems for performance monitoring in heterogenous systems are described. In an embodiment, an apparatus includes a plurality of performance counters to generate a plurality of unweighted event counts; a weights storage to store a plurality of weight values, each weight value corresponding to an unweighted event count; a plurality of weighting units, each weighting unit to weight a corresponding unweighted event count based on a corresponding weight value to generate one of a plurality of weighted event counts; and a work counter to receive the weighted event counts and generate a measured work amount.

Abstract: A wavelength selective filter device is presented suitable for use as a part of a laser cavity for processing light output of a gain section of the laser cavity. The filter structure comprises a resonator structure including at least one closed-loop resonator; and defines an optical coupler structure for coupling light from an input/output of the gain section to propagate through said resonator structure, and a light reflector structure for reflecting light filtered by said resonator structure to propagate through said resonator structure to said input/output of the gain section. The filter structure is configured so as to define two optical paths of substantially the same lengths for light propagation in the resonator structure from and to the coupler structure.

Abstract: A wavelength selective filter device is presented suitable for use as a part of a laser cavity for processing light output of a gain section of the laser cavity. The filter structure comprises a resonator structure including at least one closed-loop resonator; and defines an optical coupler structure for coupling light from an input/output of the gain section to propagate through said resonator structure, and a light reflector structure for reflecting light filtered by said resonator structure to propagate through said resonator structure to said input/output of the gain section. The filter structure is configured so as to define two optical paths of substantially the same lengths for light propagation in the resonator structure from and to the coupler structure.