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Express Pcell Manager

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See Using the Express Pcell Manager GUI in a Virtuoso Session for more information.

Express Pcells directory specifies the directory where the cached Pcells are stored. By default, the cached Pcells are stored in the .expressPcells directory that is created in your current working directory.
Environment variable: CDS_EXP_PCELL_DIR

Enable Express Pcells controls the caching of evaluated SKILL Pcells. By default, the caching of Pcells is disabled.
Environment variable: CDS_ENABLE_EXP_PCELL

Auto Save allows the automatic update of Pcell cache on disk for any new submasters generated in virtual memory with every File – Save operation. This option is selected by default. If you deselect it, you are prompted with the following message each time you save a design containing a new Pcell variant in the memory:

You have some PCell data which is not saved to cache. Do you want to save it now?

Save Cache saves all the Pcell submasters in the virtual memory (after evaluation) to the disk.

Pop-Up Context Menu Items

These menu commands apply at the level of the selected context — a library or a cellview.

• Ignore TimeStamp ignores the timestamps of Pcell supermasters while reading or updating their corresponding variants on disk. Therefore, when reading cached data, variants are read from the cache while opening the design irrespective of their timestamp. Similarly, during writing of cached data, only the new variants are cached to the disk irrespective of their timestamp. The timestamp icon appears against the selected cellviews on which the Ignore TimeStamp command is applied. If you apply the command anywhere in the Express Pcells navigation frame, without selecting any cellview, the context is considered to be All Libs.
• Update Cache checks the timestamps of the cached supermasters and if any existing data in the Pcell cache is found to be out-of-date, it updates all the corresponding cached submasters on disk as per their more recent supermasters. If, however, the Ignore TimeStamp option is selected for a supermaster in your current Virtuoso session, the Update Cache option does not update the cache on disk for that supermaster.
• Clear Cache deletes the saved variants of the selected library or cellview. If this command is applied at the top level on All Libs, all the cached data in the current cache directory is deleted.