Some arguments from the lecture for each processor:
Processor A: Better if we are optimizing for running single-threaded applications or applications that don't make good use of parallelism on many cores. This processor would be better if we were, say, optimizing for running Microsoft Word.
Processor B: Processor B has more processing power overall. It might be better if we are running a lot of different threads and don't care about single-threaded performance, or if we want to demonstrate good speedup on a program that takes advantage of many cores.
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Q_Q
An interesting note is that modern CPUs support some sort of Turbo. When only a few cores are used (say, 1 in a quad core cpu), the single core overclocks itself and the other cores to go sleep, so overall the entire processor still fits in the same thermal envelope. The CPU essentially takes resources (in this case, power) from one core and donates it to another core to form a fat core.
Some arguments from the lecture for each processor:
Processor A: Better if we are optimizing for running single-threaded applications or applications that don't make good use of parallelism on many cores. This processor would be better if we were, say, optimizing for running Microsoft Word.
Processor B: Processor B has more processing power overall. It might be better if we are running a lot of different threads and don't care about single-threaded performance, or if we want to demonstrate good speedup on a program that takes advantage of many cores.
This comment was marked helpful 0 times.
An interesting note is that modern CPUs support some sort of Turbo. When only a few cores are used (say, 1 in a quad core cpu), the single core overclocks itself and the other cores to go sleep, so overall the entire processor still fits in the same thermal envelope. The CPU essentially takes resources (in this case, power) from one core and donates it to another core to form a fat core.
This comment was marked helpful 1 times.