🔍 EDA: Simulation Data Searches

Simulation Data Cleanup

• EDA design engineers will often run their simulations in "debug" mode, which creates additional data such as fsdb, sdb and other files

• These files are ephemeral and can be cleaned after the debugging process

The following searches enable this type of data to be identified and remedial action to be taken quickly

Find waveform simulation data

• FSDB(Fast Signal Database and Simulation Database) is waveform data from simulations, for post-simulation debugging and analysis

• SDB: Simulation data for post-simulation analysis and verification

Find FSDB Wareform Data (Fast Signal Database)

• Stores waveform data from simulations, commonly used with Novas Verdi.

• Efficient for large-scale data in tools like Synopsys VCS and Cadence Xcelium.

SDB (Simulation Database)

• Stores simulation data for post-simulation analysis and verification.

• Associated with Synopsys and used in large-scale circuit simulations

Find Compile Directories

• Software such as Synopsys Design Compiler (DC) performs synthesis processes which generate compile data

• The directory name consistently has a suffix of dfs_ so we can use this to identify compile directories that may have unused, stale or failed compile data within

Find Scratch Directories older than 3 Months

• EDA tools will create temporary directories for data generated during simulation or synthesis runs

• After processing completes they are marked for cleanup or deletion but may remain on storage

Find Log files older than 3 Months

• EDA tools like Tools like Synopsys VCS, Cadence Xcelium, or Mentor Graphics generate log files

Find Trash files older than 3 Months

• EDA tools like Tools like Synopsys VCS, Cadence Xcelium, or Mentor Graphics generate data that is marked for deletion or cleanup after the process completes

• Common filenames are used to identify data that should be purged but may not complete

Orphaned Core Dump Files

• A core dump file contains memory dump, crash dump, storage dump, system dump

• This is the recorded state of the working memory of a computer program at a specific time, generally when the program has crashed or otherwise terminated abnormally

• Core dump files can become orphaned when for AD users no longer work at the Company

Smart Search Config

!old_fsdb_sdb|type:(type:file AND atime:[* TO now/m-3M/d] AND extension:(fsdb OR sdb))
!old_fsdb|extension:fsdb AND mtime:[* TO now/m-1M/d]

!compile_directories|name:*dfs_* AND mtime:[* TO now/m-1M/d]  AND type:directory

!old_scratch_directories|name:*scratch* AND type:directory AND atime:[* TO now/m-3M/d]

!old_log_files|extension:(log)  AND atime:[* TO now/m-3M/d]
!log_file|extension:(log OR log.gz) AND type:file

!trash|name:*trash* AND type:directory
!old_trash|(old OR trash OR tmp OR temp OR junk OR recycle OR delete OR deleteme OR clean OR remove OR trashinfo) AND atime:[* TO now/m-3M/d]

!orphan_core_dump|name:/core[.].*/ AND owner:/[0-9]{4,8}/