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Analyzing Simulation Results<br />

Performance Diagnostics<br />

SORT_REL. At the end of the report, Eldo reports the X instance names most frequently<br />

seen in all sections.<br />

These outputs are already present in the Questa ADMS statistics file when the tool is<br />

invoked with the vasim -stat argument.<br />

• A wave named dbg(tstep) is created, containing the information about the time-step:<br />

which nodes had impact in the choice of that step. It shows the size of the time-step used<br />

by Eldo as well as the node that was most limiting that time-step. For example:<br />

Figure 9-1. EZwave Waveform Showing Nodes Impacting Time-Step<br />

• The 20 nodes which have the steepest voltage variation are returned in the ASCII .chi<br />

file output, along with values of the slope (and time at which the variation occurs). This<br />

is a comparison between the maximum variation of the nodes. Example output showing<br />

nodes with the largest slewrate:<br />

382<br />

Eldo® User's Manual, 15.3

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