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| author | Alyssa Rosenzweig <alyssa@rosenzweig.io> | 2023-05-12 08:13:22 -0400 |
|---|---|---|
| committer | Marge Bot <emma+marge@anholt.net> | 2023-06-07 03:21:49 +0000 |
| commit | 389c0fdc7c71c634ca35cef6cb4d0c018358f974 (patch) | |
| tree | bf1c824e291ee8b9c56bef7b69936ac6c7403310 /docs/envvars.rst | |
| parent | 3a0d1f83d57db303b85ab281b161a34229484d5a (diff) | |
| download | mesa-389c0fdc7c71c634ca35cef6cb4d0c018358f974.tar.gz mesa-389c0fdc7c71c634ca35cef6cb4d0c018358f974.tar.bz2 mesa-389c0fdc7c71c634ca35cef6cb4d0c018358f974.zip | |
asahi: Add ASAHI_MESA_DEBUG=nowc flag
Add a debug flag to disable write-combining as a performance hack. This may help
diagnose slowness with glReadPixels() heavy workloads like screen capture.
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23480>
Diffstat (limited to 'docs/envvars.rst')
| -rw-r--r-- | docs/envvars.rst | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/docs/envvars.rst b/docs/envvars.rst index 5b7352113a1..98233c67b6e 100644 --- a/docs/envvars.rst +++ b/docs/envvars.rst @@ -1633,6 +1633,10 @@ Asahi driver environment variables possible) or added in the Mesa-wide driconf (if closed source). ``dirty`` In debug builds only: disable dirty tracking optimizations. + ``nowc`` + Disable write-combining (force all allocations to be write-through). This + may be useful for diagnosing certain performance issues. Note imported + buffers may still be write-combined. .. envvar:: AGX_MESA_DEBUG |