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| author | Marek Olsak <marek.olsak@amd.com> | 2016-08-05 21:23:29 +0000 |
|---|---|---|
| committer | Marek Olsak <marek.olsak@amd.com> | 2016-08-05 21:23:29 +0000 |
| commit | 355a8642b470a4c1910a8e7c65c546e28622694d (patch) | |
| tree | 7c8fd2ed0531a1593a3966d1749079fd56587e23 /llvm/lib | |
| parent | 71d74d4b256709ad9ad3ae6927486e46dfc280c3 (diff) | |
| download | bcm5719-llvm-355a8642b470a4c1910a8e7c65c546e28622694d.tar.gz bcm5719-llvm-355a8642b470a4c1910a8e7c65c546e28622694d.zip | |
AMDGPU/SI: Increase SGPR limit to 96 on Tonga/Iceland
Summary:
This is the setting of the Vulkan closed source driver.
It decreases the max wave count from 10 to 8.
26010 shaders in 14650 tests
Totals:
VGPRS: 829593 -> 808440 (-2.55 %)
Spilled SGPRs: 81878 -> 42226 (-48.43 %)
Spilled VGPRs: 367 -> 358 (-2.45 %)
Scratch VGPRs: 1764 -> 1748 (-0.91 %) dwords per thread
Code Size: 36677864 -> 35923932 (-2.06 %) bytes
There is a massive decrease in SGPR spilling in general and -7.4% spilled
VGPRs for DiRT Showdown (= SGPRs spilled to scratch?)
Reviewers: arsenm, tstellarAMD, nhaehnle
Subscribers: arsenm, llvm-commits, kzhuravl
Differential Revision: https://reviews.llvm.org/D23034
llvm-svn: 277867
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Target/AMDGPU/AMDGPUSubtarget.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUSubtarget.h b/llvm/lib/Target/AMDGPU/AMDGPUSubtarget.h index ee7da48d0d7..bab0d2b5d76 100644 --- a/llvm/lib/Target/AMDGPU/AMDGPUSubtarget.h +++ b/llvm/lib/Target/AMDGPU/AMDGPUSubtarget.h @@ -333,7 +333,9 @@ public: class SISubtarget final : public AMDGPUSubtarget { public: enum { - FIXED_SGPR_COUNT_FOR_INIT_BUG = 80 + // The closed Vulkan driver sets 96, which limits the wave count to 8 but + // doesn't spill SGPRs as much as when 80 is set. + FIXED_SGPR_COUNT_FOR_INIT_BUG = 96 }; private: |
