The common concurrency runtime provides a simple and self-consistent set of concurrency primitives that developers can use to more readily split their computation into more discrete chunks that can scale better with additional processors. In addition to the foregoing, other method and system aspects are described in the claims, drawings, and text forming a part of the present application. Further, an ink remaining amount check function of an ink jet printer is performed with priority over other processes by a timer interrupt operation. The second metal layer is structured to form at least two layer regions, which are disposed on the contiguous subsection of the first metal layer. The plurality of trenches has a pattern corresponding to the pattern of openings and comprising a pattern of through-substrate-via openings or redistribution layer openings.