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Multi-core architectures

1 Multi-core architecturesJernej Barbic15-213, Spring 2007 May 3, 20072 Single- core computer3 Single- core CPU chipthe single core4 Multi-core architectures This lecture is about a new trend in computer architecture:Replicate multiple processor cores on a single 1 core 2 core 3 core 4 Multi-core CPU chip5 Multi-core CPU chip The cores fit on a single processor socket Also called CMP (Chip multi -Processor)core1core2core3core46 The cores run in parallelcore1core2core3core4thread 1thread 2thread 3thread 47 Within each core , threads are time-sliced (just like on a uniprocessor)core1core2core3core4several threadsseveral threadsseveral threadsseveral threads8 Interaction with theOperating System OS perceives each core as a separate processor OS scheduler maps threads/processes to different cores Most major OS support Multi-core today.

1 Multi-core architectures Jernej Barbic 15-213, Spring 2007 May 3, 2007

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