Operating Systems Memory Management c Ideally programmers want memory that is A large t fast 口 non volatile Memory hierarchy(层次) H small amount of fast, expensive memory -cache E some medium-speed medium price main memory H gigabytes ofslow, cheap disk storage G Memory manager handles the memory hierarchy Gao Haichang, Software School, Xidian UniversityOperating Systems Gao Haichang , Software School, Xidian University 4 Memory Management  Ideally programmers want memory that is  large  fast  non volatile  Memory hierarchy （层次）  small amount of fast, expensive memory – cache  some medium-speed, medium price main memory  gigabytes of slow, cheap disk storage  Memory manager handles the memory hierarchy