bprobe quandary 10 times
trial# bottleneck_bw
0	 7.23090e+04
1	 7.22440e+04
2	 7.20680e+04
3	 7.22520e+04
4	 7.28230e+04
5	 7.22560e+04
6	 7.21630e+04
7	 7.22970e+04
8	 5.40410e+04
9	 5.49300e+04
valid trial#=10, average bottleneck bw=68738.3