Where set the number of cores in MT?

Hello.After set G4MTRunManager* runManager = new G4MTRunManager;
runManager->SetNumberOfThreads(24); the output indicates that the number of threads is 24 ,but cpu=1122.8%.![截屏2020-08-18 上午11.08.20|470x500](upload://xx截屏2020-08-18 上午11.08.38 4XUP7mylQ8c8fEonA2ufrqmqW.png) My computer owns 24 cores . One core is equal to one thread.It means this program just used 11 cores though printing out 24 threads. Could you tell me where I can set the number of cores used? Does Geant4 only use 11 cores regardless of the number of threads?