An image forming apparatus capable of forming an image without transfer deviation or rumples by detecting the loop amount of the sheet material with a plurality of thresholds at multiple stages through a loop amount detecting portion detecting the loop amount of a sheet passing between conveyance guide members. A hardware description language description of a target hardware platform is determined. Using a determined estimated cache miss rate of the thread, the thread is scheduled with other threads to achieve a relatively low cache miss rate in the shared cache memory. The outer die pad structure being supported by the outer tie bars.