common/utrace: Prefix all environment variables with MESA_
To be more consistent with other environment variables and ensure better scoping, all environment variables in utrace have now been prefixed with `MESA_`. Signed-off-by: Mark Collins <mark@igalia.com> Reviewed-by: Danylo Piliaiev <dpiliaiev@igalia.com> Reviewed-by: Yonggang Luo <luoyonggang@gmail.com> Ack-by: Chia-I Wu <olvaffe@gmail.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/18271>
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@@ -21,7 +21,7 @@ Usage
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u_trace is controlled by environment variables:
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:envvar:`GPU_TRACES`
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:envvar:`MESA_GPU_TRACES`
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controls whether u_trace is enabled and trace output
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``print``
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@@ -38,7 +38,7 @@ u_trace is controlled by environment variables:
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traces can be collected without setting this but it may miss some
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events prior to the tracing session being started.
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:envvar:`GPU_TRACEFILE`
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:envvar:`MESA_GPU_TRACEFILE`
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specifies a file where to write the output instead of ``stdout``
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:envvar:`*_GPU_TRACEPOINT`
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