explanations about core usage during MT5 backtest session

[Golgoth]

Hello, I am doing a backtest of my EA with MT5 and some optimisations settings.

When I go to to Agents tab, I see that 7 processors over 8 have their status on Finished. Only one is working, and I still have 200h of backtesting.
I don't understand why all the processors  are not 100% used .

Can someone explain me what is going on please 

Thank you,

[Code2219 or 2319]

either the test gets finished after that agent finishing.
or a new set of tests gets drawn to each agent right after that

[Golgoth]

Code2219 or 2319 #:
either the test gets finished after that agent finishing.
or a new set of tests gets drawn to each agent right after that

yes that's what happened, I wanted to delete my post but couldn't figured how to do it.

Thank you for your answer :)