Multiprocessor Operating Systems

• mémoire
• cours magistral
• mémoire - matière potentielle : bus bandwidths
• mémoire - matière potentielle : access
• mémoire - matière potentielle : memory

Operating Systems 11/9/2009 CSC 256/456 1 11/9/2009 CSC 256/456 1 Multiprocessor Operating Systems CS 256/456 Dept. of Computer Science, University of Rochester 11/9/2009 CSC 256/456 2 Multiprocessor Hardware • A computer system in which two or more CPUs share full access to the main memory • Each CPU might have its own cache and the coherence among multiple caches is maintained – write operation by a CPU is visible to all other CPUs – writes to the same location is seen in the same order by all CPUs (also called write serialization) – bus snooping and cache

• local freelists for control blocks
• smp processors share memory bus bandwidths
• full access to the main memory
• multi-processors
• scheduling tasks with complementary resource needs
• high resource usage
• heavy tasks from memory access
• scheduling
• bus