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[WIP] Add documentation to explain which parts of VPR are parellel #3041

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[WIP] Add documentation to explain which parts of VPR are parellel #3041

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6 changes: 6 additions & 0 deletions doc/src/vpr/command_line_usage.rst
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Expand Up @@ -223,6 +223,12 @@ General Options

If this option is not specified it may be set from the ``VPR_NUM_WORKERS`` environment variable; otherwise the default is used.

If this option is set to something other than 1, the following algorithms can be run in parallel:

* Timing Analysis
* Routing (If routing algorithm is set to parallel or parallel_decomp; See :option:`--router_algorithm`)
* Portions of analytical placement (If using the analytical placement flow and compiled VPR with Eigen enabled; See :option:`--analytical_place`)

.. note:: To compile VPR to allow the usage of parallel workers, ``libtbb-dev`` must be installed in the system.

**Default:** ``1``
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