What are the differences between a thread and a core in a CPU?
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There are two types of threads, hardware threads and software threads. A CPU core which is hyperthreaded can run multiple independent processes per CPU tick. So instead of one tick meaning one instruction, one tick means *n* instructions, where *n* is the number of threads per core.
A software thread simulates this phenomenon but can’t replecate the CPU tick. It can split a process into multiple simultaneous jobs but can only do *nc* instructions per tick (*n* number of threads *c* cores). Generally, though, the OS will keep one process on one hardware thread even if it’s multithreaded unless it’s very resource intensive.
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