evaluation dotproduct test, it report -406.02 ??? does it make sense??

[melodylail]

Hi

i reproduce this paper by evaluating the result of running dotproduct( provided by this project).

But the report shown as follows:

application runtime actual(ns) runtime predicted(ns) error(%) speedup(parallel) speedup(serial) coverage(%)
dotproduct. 1 532690800.0 2695542800.0 -406.02 0.94 025 100.0

-406.02 error ??? Does it make sense ??

BR,
LuQiang