User`s guide

E-Prime User’s Guide
Appendix A: Timing Test Results
Page A-10
Percentage of Missed Ticks by Block
0
0.005
0.01
0.015
0.02
0.025
0.03
0.035
0.04
0.045
Sequential Run 1-1000
% Missed Ticks
Figure 6. Percentage of millisecond ticks missed as a function of the test run. This should
be less than 0.1% (TicksMissedPercent.ANL).
The graph of the Maximum Missed Tick measure (Figure 7) provides an estimate of the worst-
case delay in the running of an experiment. In this case, the delay was 3ms with a probability of
less than 0.04%. This would be acceptable for most experiments.
Maximum Missed Tick by Block
0
0.5
1
1.5
2
2.5
3
3.5
Sequential Run 1-1000
Maximum Missed Tick
Figure 7. Maximum Missed Tick report for a 1000 run test (TicksMaxMissed.ANL).
The clock bin count test (Figure 8) gives a distribution of the delay times in table and graph form.
It shows how many counts occurred for each time interval. Use this as a diagnostic to suggest
what programs are taking cycles. Below is the distribution of tick sizes for a WinBook
®
portable
computer. Potentially, a program like the power conservation program is producing over 500