Intel Xeon Processor Multiprocessor Platform Design Guide

105
Methodology for Determining Topology and Routing Guidelines
Figure 9-11. Example of Sweeps Used to Evaluate the Length Limits of Trace L2 and L3
0
3
6
9
12
Max Tflight = 2.45 ns
0
3
6
9
12
0
2
Tflight [ns]
L3
[in]
Min Tflight = 1.0 ns
0
3
6
9
1
2
0
2
0.0
0.1
0.2
0.3
Undershoot [V]
L2
[in]
L3
[in]
Spec = - 0.7 V
Tflight [ns]
0246
0
1
2
L2 [in]
L3 [in]
L2 [in]
L2 [in]
0
1
2
3
0
1
2
3
0
2
L3
[in]
Figure 9-12. Monte Carlo Analysis Should Be Performed on These Areas of the Phase 1
Solution Space
0 2 4 6
0
1
2
L2 [in]
L3
[in]
Perform Monte-Carlo analysis
with W/C bit pattern
on these areas of the solution space