eldo_user

Analyzing Simulation Results
Time Step Management
can then simulate a specific single device with the proposed DC sweep or you can try different
DC sweeps if you want to check the characteristics for some other dimensions (for example,
performing a sweep on some other nodes of the device). The generated filename is of the form:
.time=.sweep=.device=.cir
Tip
See “Running Eldo” in the Eldo Reference Manual.
Related Topics
Time Step Management
Performance Diagnostics
Time Step Management
The analysis of time step management is enabled with the -diagmode tstep command line
argument. Use this if Eldo performs too many average Newton iterations or if it rejects too
many time steps: if the ratio of accepted time steps compared to rejected time steps is lower than
six then specify this argument to try to understand what is limiting the simulator.
This flag behaves in a similar way to -diagmode conv, but does not use an extra file and can be
run directly.
Tip
See “Running Eldo” in the Eldo Reference Manual.
Related Topics
Non-Convergence Analysis
Performance Diagnostics
Performance Diagnostics
The analysis of performance diagnostics is enabled with the -diagmode perf command line
argument to help you understand why a circuit does not behave as expected, or takes more time
than expected to simulate.
The performance diagnostics generates the following information:
• “Nodes/Devices Impacting Time-Step Adjustment” on page 381
• “CPU Time Evaluating Device Types” on page 383
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Eldo® User's Manual, 15.3