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third_party_mesa3d/docs
Zan Dobersek f9c4e25483 freedreno: add fd_rd_output facilities for gzip-compressed RD dumps
Provide fd_rd_output facilities which enable constructing RD dumps that are
stored into gzip-compressed output. This matches the default behavior of
libwrap. Enabling and adjusting the behavior of functionality is done
through the FD_RD_DUMP environment variable.

Integration into Turnip's MSM backend is covered, replacing the previous
RD dump that was enabled through TU_DEBUG=rd. That debug option still
works and is the same as using FD_RD_DUMP=enable.

By default the dumps are created for each submission, using the provided
submit index. FD_RD_DUMP=combine enables gathering dumps for submissions
for the given logical device into a single file.

In the Turnip integration, FD_RD_DUMP=full will force dumping contents of
any buffer object. Additionally, with that option enabled any previous
submit will be waited on.

Specifying FD_RD_DUMP=trigger sets up a trigger file that can be used to
activate dumping manually. Writing zero or some non-integer value to the
file will disable dumping. Writing a positive integer value to it will
enable dumps for that many future submissions. Writing -1 to it will enable
dumps until disabled.

Signed-off-by: Zan Dobersek <zdobersek@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/27230>
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