Abstract: A system performs adaptive thermal ceiling control at runtime. The system includes computing circuits and a thermal management module. When detecting a runtime condition change that affects power consumption in the system, the thermal management module determines an adjustment to the thermal ceiling of a computing circuit, and increases the thermal ceiling of the computing circuit according to the adjustment.

Abstract: A computing system performs shared cache allocation to allocate cache resources to groups of tasks. The computing system monitors the bandwidth at a memory hierarchy device that is at a next level to the cache in a memory hierarchy of the computing system. The computing system estimates a change in dynamic power from a corresponding change in the bandwidth before and after the cache resources are allocated. The allocation of the cache resources are adjusted according to an allocation policy that receives inputs including the estimated change in the dynamic power and a performance indication of task execution.

Abstract: A computing system performs partial cache deactivation. The computing system estimates the leakage power of a cache based on operating conditions of the cache including voltage and temperature. The computing system further identifies a region of the cache as a candidate for deactivation based on cache hit counts. The computing system then adjusts the size of the region for the deactivation based on the leakage power and a bandwidth of a memory hierarchy device. The memory hierarchy device is at the next level to the cache in a memory hierarchy of the computing system.

Abstract: A polyamic acid-based composition is prepared by reacting a diamine reactant and a dianhydride reactant. The diamine reactant includes 20-70 mol % of a fluorine-containing diamine component having a trifluoromethyl group substituted main chain, and 30-80 mol % of a fluorine-free diamine component. The dianhydride reactant includes 65-100 mol % of an aromatic tetracarboxylic dianhydride component and 0-35 mol % of an aliphatic tetracarboxylic dianhydride component. A liquid crystal orienting agent includes the aforesaid polyamic acid-based composition and a solvent. A liquid crystal orienting film is formed by a process including: preparing a mixture containing the aforesaid polyamic acid-based composition and a solvent; coating the mixture onto a substrate so as to form a film on the substrate; and heating the film so as to convert polyamic acid of the polyamic acid-based composition into polyamide.