junyan qiu

Thanks for your responses, which are professional. When the number of cases goes up, the ratio of cache-miss increases quickly, which can explain the significant slowing down of solving speed.

I am sure 8 cores are fully available. I can see the number of busy cores is also 8 (with 100% usage), and there is no other heavy task in the background when I experiment. I guess the problem may...

Please use fixed TSP data for this experiment to avoid non-determinism.  I use a benchmark in TSPLIB as data, which consists of 200 points. Every TSP case is using the same data. Then the the num...

Hi, Jaromił:  I am not able to observe this issue when comparing caseNum=4 vs caseNum=2, because then all cases can use physical cores.It should be best to limit the number of cases run in paralle...