0,0 → 1,105 |
Debugging |
========= |
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Debugging utilities in gallium. |
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Debug Variables |
^^^^^^^^^^^^^^^ |
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All drivers respond to a set of common debug environment variables, as well as |
some driver-specific variables. Set them as normal environment variables for |
the platform or operating system you are running. For example, for Linux this |
can be done by typing "export var=value" into a console and then running the |
program from that console. |
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Common |
"""""" |
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.. envvar:: GALLIUM_PRINT_OPTIONS <bool> (false) |
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This option controls if the debug variables should be printed to stderr. This |
is probably the most useful variable, since it allows you to find which |
variables a driver uses. |
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.. envvar:: GALLIUM_RBUG <bool> (false) |
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Controls if the :ref:`rbug` should be used. |
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.. envvar:: GALLIUM_TRACE <string> ("") |
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If set, this variable will cause the :ref:`trace` output to be written to the |
specified file. Paths may be relative or absolute; relative paths are relative |
to the working directory. For example, setting it to "trace.xml" will cause |
the trace to be written to a file of the same name in the working directory. |
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.. envvar:: GALLIUM_DUMP_CPU <bool> (false) |
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Dump information about the current CPU that the driver is running on. |
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.. envvar:: TGSI_PRINT_SANITY <bool> (false) |
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Gallium has a built-in shader sanity checker. This option controls whether |
the shader sanity checker prints its warnings and errors to stderr. |
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.. envvar:: DRAW_USE_LLVM <bool> (false) |
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Whether the :ref:`Draw` module will attempt to use LLVM for vertex and geometry shaders. |
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State tracker-specific |
"""""""""""""""""""""" |
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.. envvar:: ST_DEBUG <flags> (0x0) |
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Debug :ref:`flags` for the GL state tracker. |
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Driver-specific |
""""""""""""""" |
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.. envvar:: I915_DEBUG <flags> (0x0) |
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Debug :ref:`flags` for the i915 driver. |
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.. envvar:: I915_NO_HW <bool> (false) |
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Stop the i915 driver from submitting commands to the hardware. |
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.. envvar:: I915_DUMP_CMD <bool> (false) |
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Dump all commands going to the hardware. |
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.. envvar:: LP_DEBUG <flags> (0x0) |
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Debug :ref:`flags` for the llvmpipe driver. |
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.. envvar:: LP_NUM_THREADS <int> (number of CPUs) |
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Number of threads that the llvmpipe driver should use. |
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.. envvar:: FD_MESA_DEBUG <flags> (0x0) |
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Debug :ref:`flags` for the freedreno driver. |
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.. _flags: |
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Flags |
""""" |
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The variables of type "flags" all take a string with comma-separated flags to |
enable different debugging for different parts of the drivers or state |
tracker. If set to "help", the driver will print a list of flags which the |
variable accepts. Order does not matter. |
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.. _rbug: |
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Remote Debugger |
^^^^^^^^^^^^^^^ |
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The remote debugger, commonly known as rbug, allows for runtime inspections of |
:ref:`Context`, :ref:`Screen`, :ref:`Resource` and :ref:`Shader` objects; and |
pausing and stepping of :ref:`Draw` calls. Is used with rbug-gui which is |
hosted outside of the main mesa repository. rbug is can be used over a network |
connection, so the debugger does not need to be on the same machine. |