preferredLayerStrength

APR.device.route preferredLayerStrength int layerStrength

Description

Controls the extent to which the router favors preferred layers compared to layers outside the preferred range. This environment variable can be adjusted to fine tune routing results.

• 0 means preferred layers are not treated specially at all.
• 1-5 adjusts the preference strength, with 5 being most preferred.
• 6 imposes a hard constraint on the maximum length for pathSegs on non-preferred layers and leaves opens if no solution that honors this constraint can be found. At this strength, each new pathSeg on a non-preferred layer can be at most the length of the layer's pitch.

The default value is 3.

GUI Equivalent

None

Examples

envGetVal("APR.device.route" "preferredLayerStrength")

envSetVal("APR.device.route" "preferredLayerStrength" 'int 2)

Related Topics

Routing Assistant User Interface for Device-Level Routing

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