I use several remote servers to test a parallel system, the process will take about 0.4s each time. So when I run the program in several servers, the running time range from less than 0 to 1s. The weird results came from the small difference system time in each remote, which show as follows:
[1] 14:25:45 [SUCCESS] [email protected]:22
Sun Dec 25 14:25:46 EST 2016
[2] 14:25:45 [SUCCESS] [email protected]:22
Sun Dec 25 14:25:45 EST 2016
[3] 14:25:45 [SUCCESS] [email protected]:22
Sun Dec 25 14:25:46 EST 2016
[4] 14:25:45 [SUCCESS] [email protected]:22
Sun Dec 25 14:25:46 EST 2016
[5] 14:25:45 [SUCCESS] [email protected]:22
Sun Dec 25 14:25:47 EST 2016
The servers have 1s to 2s difference with each other, so my test results are some of less than 0. So how to avoid this difference in servers that the results will be normal?