Difference between revisions of "How to save computer resources"
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Normally a -v file may contain multiple module definitions. The Verilog parser is supposed to pick only the required modules from that file. | Normally a -v file may contain multiple module definitions. The Verilog parser is supposed to pick only the required modules from that file. | ||
| − | However, the file may not contain any of the required modules; instead it | + | However, the file may not contain any of the required modules; instead it is a large file containing many other modules of no interest. In such a case, analyzing and creating a parse tree for the full file will consume much time and memory. |
To prevent this, we provide this compile flag to quickly parse the file and see if it is actually required or not, without creating the parse tree. If it is not required we will ignore the file, otherwise we will fully parse it and pick the required modules. | To prevent this, we provide this compile flag to quickly parse the file and see if it is actually required or not, without creating the parse tree. If it is not required we will ignore the file, otherwise we will fully parse it and pick the required modules. | ||
Revision as of 22:22, 10 March 2021
>>> This page is under construction. <<<
- Compile flag VERIFIC_MEMORY_MANAGER
Enables the new, zero-overhead, Verific memory manager. Typically reduces memory usage of the Verific software by an additional 20% over the default system memory manager.
- Compile flag DB_USE_PORT_ORDERED_PORTREF
Organizes the PortRef structures in an ordered array rather than a hash table. This saves a significant amount of memory since PortRefs are no longer individually allocated, and the overhead of a hash table is also saved.
- Compile flag VERILOG_QUICK_PARSE_V_FILES
Normally a -v file may contain multiple module definitions. The Verilog parser is supposed to pick only the required modules from that file.
However, the file may not contain any of the required modules; instead it is a large file containing many other modules of no interest. In such a case, analyzing and creating a parse tree for the full file will consume much time and memory.
To prevent this, we provide this compile flag to quickly parse the file and see if it is actually required or not, without creating the parse tree. If it is not required we will ignore the file, otherwise we will fully parse it and pick the required modules.
- Runtime flag veri_improve_include_dir_processing_runtime_for_network_file_system
Adds directory caching for include directories with simple files (files without a directory specification).
We read the contents of the directory on first encountering it while checking for an include file. Subsequent searches will find the file in the cache instead of the actual disk.
The cache is automatically cleared at the end of the veri_file::Analyze() or veri_file::AnalyzeMultipleFiles() calls. Note that we cannot keep it alive after the two analyze calls since there could possibly be a chdir() call which would make the cache invalid.
