4 ms·

Except if you monitor per CPU usage, as you should.

• jiggawatts 7y ago
  Except that you can't, because most operating systems will not use the same CPU core consistently for a single thread. This is done for a variety of reasons, including spreading thermal loads to ensure that turbo boost can consistently kick in.
  • bnegreve 7y ago
    You're right but still, I don't think it is difficult to realize that a particular process is only using one core. If you think it is, you should probably consider another application to monitor system usage.
• haimez 7y ago
  If you use cloudwatch, the “should” part is tricky. “Should” you be able to and “should” you do it if metrics were reasonably priced based on their basic required storage / computational footprint? Yes. However, “should” you in a world where you only have cloudwatch because you don’t want to roll your own monitoring or bring in a third party vendor? Probably not. It’s not a good thing, but it’s a reality. 1/n approximation is your go to here.