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author | Ben Crocker <[email protected]> | 2019-11-13 20:27:24 +0000 |
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committer | Dylan Baker <[email protected]> | 2019-11-20 08:24:09 -0800 |
commit | ae071434e918586ab88a6533cd4a3b3f3dbd5a1f (patch) | |
tree | 99634dc6dd18d7f8d2b4fde590848b63d3ac3eba /src/mesa/main | |
parent | 60c299c542d4eea01ee274eae6a38dafdaae2362 (diff) |
llvmpipe: use ppc64le/ppc64 Large code model for JIT-compiled shaders
Large programs, e.g. gnome-shell and firefox, may tax the
addressability of the Medium code model once a (potentially unbounded)
number of dynamically generated JIT-compiled shader programs are
linked in and relocated. Yet the default code model as of LLVM 8 is
Medium or even Small.
The cost of changing from Medium to Large is negligible:
- an additional 8-byte pointer stored immediately before the shader entrypoint;
- change an add-immediate (addis) instruction to a load (ld).
Testing with WebGL Conformance
(https://www.khronos.org/registry/webgl/sdk/tests/webgl-conformance-tests.html)
yields clean runs with this change (and crashes without it).
Testing with glxgears shows no detectable performance difference.
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1753327, 1753789, 1543572, 1747110, and 1582226
Closes: https://gitlab.freedesktop.org/mesa/mesa/issues/223
Co-authored by: Nemanja Ivanovic <[email protected]>, Tom Stellard <[email protected]>
CC: [email protected]
Signed-off-by: Ben Crocker <[email protected]>
(cherry picked from commit 9c3be6d21fa6a45852045d0286b80fb420f82fe3)
Conflicts resolved Dylan (PIPE_ARCH -> UTIL_ARCH rename)
Diffstat (limited to 'src/mesa/main')
0 files changed, 0 insertions, 0 deletions