Altera公司原版设计手册，nios ii ide profiling模式使用。-This application note describes a variety of ways to measure the performance of a Nios®　II

system with three tools: the GNU profiler, called nios2-elf-gprof, the timestamp interval

timer component, and the performance counter component. Two tutorials give detailed

examples of using these tools to measure performance in the Altera®　Nios II Software Build

Tools (SBT) development flow.