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In my CPU I know I have 8 cores and 16 threads (2 threads by core).

But when I create threads through programming (for example in c++) I can create more than 100,000 threads.

Then what's the difference between those two kinds of threads?

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    Your CPU can task switch so that your 100,000 logical threads run in 16 actual CPU threads. Commented Oct 31, 2020 at 11:07

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A C++ thread is just a sequence of instructions and your native thread(cpu thread) is something which can run a C++ thread.

  • C++ thread: something to run
  • Hardware thread: where it can run
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