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Tweak I/O tracing documentation

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RichardG867
2024-09-04 17:58:56 -03:00
parent 5885843188
commit be77a3b084
1 changed files with 2 additions and 2 deletions
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dev/api/io.rst
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@@ -158,13 +158,13 @@ One trace entry is output per line, formatted as such::
* SMM flag: **1** if the CPU is in System Management Mode, **0** otherwise
* Handler types found: as byte widths **OR**\ ed together; for example, 3 indicates both 8-bit (1) and 16-bit (2) handlers were found for this port
* Total handler count for this port (sum of all types)
* Call count: total amount of callbacks called in this operation; fallbacks count as multiple calls
* Operation type: ``in`` or ``out`` followed by ``b``, ``w`` or ``l``
* Port being accessed (in hexadecimal)
* Value being read or written (in hexadecimal)
.. note:: I/O tracing incurs a heavy load on the standard output, which can bottleneck emulation to a near halt in I/O-heavy workloads such as POST when outputting to a terminal. Using the ``-L`` command line option to redirect logging to a file on solid state storage is highly recommended.
.. note:: I/O tracing incurs a heavy load on stderr output, which can bottleneck emulation to a near halt in I/O-heavy workloads (such as POST) when outputting to a terminal. Using the ``-L`` command line option to redirect logging to a file on solid state storage is highly recommended.
I/O traps
---------