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Update docs | Revert/Update emulator.cc

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abejgonzalez
2020-08-21 12:06:18 -07:00
parent 446631543b
commit c9791ccbdf
2 changed files with 43 additions and 33 deletions
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7
docs/Simulation/Software-RTL-Simulation.rst
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@@ -191,8 +191,9 @@ When building the verilator simulator there are some additional options:
.. code-block:: shell
make VERILATOR_THREADS=8
make VERILATOR_THREADS=8 NUMACTL=1
The ``VERILATOR_THREADS=<num>`` option enables the compiled Verilator simulator to use ``<num>`` parallel threads.
On a multi-socket machine, you will want to make sure all threads are on the same socket by using ``numactl``.
You can also just use the ``numa_prefix`` wrapper, which is a simple wrapper around ``numactl`` that runs your verilated simulator like this: ``$(numa_prefix) ./simulator-<name> <simulator-args>``.
On a multi-socket machine, you will want to make sure all threads are on the same socket by using ``NUMACTL=1`` to enable ``numactl``.
By enabling this, you will use CHipyard's ``numa_prefix`` wrapper, which is a simple wrapper around ``numactl`` that runs your verilated simulator like this: ``$(numa_prefix) ./simulator-<name> <simulator-args>``.
Note that both these flags are mutually exclusive, you can use either independently (though it makes sense to use ``NUMACTL`` just with ``VERILATOR_THREADS=8`` during a Verilator simulation).