llvm/cuda: Enable function inlining in CUDA path #2338
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The threshold is empirically determined using the predator-prey model. Number of function calls (static) changes: model | before | inline0 | inline4 | inline6 | inline7 | inline8 p-p | 287 | 195 | 162 | 123 | 121 | 125 s-f | 413 | 221 | 206 | 156 | 155 | 164 This significantly reduces GPU stalls because of instruction fetch (measured on P620) (pp-MT/pp-Philox): 10.99%/18.21% -> 5.06%/8.46% (sf-MT/sf-Philox): 36.72%/38.96% -> 19.1%/22.2% as well as the amount of private data read/written. This combines to ~15-20% (pp) improvement in kernel runtime. Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu>
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This PR causes the following changes to the html docs (ubuntu-latest-3.7-x64): See CI logs for the full diff. |
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The threshold is empirically determined using the predator-prey model.
Number of function calls (static) changes:
model | before | inline0 | inline4 | inline6 | inline7 | inline8
p-p | 287 | 195 | 162 | 123 | 121 | 125
s-f | 413 | 221 | 206 | 156 | 155 | 164
This significantly reduces GPU stalls because of instruction fetch
(measured on P620)
(pp-MT/pp-Philox): 10.99%/18.21% -> 5.06%/8.46%
(sf-MT/sf-Philox): 36.72%/38.96% -> 19.1%/22.2%
as well as the amount of private data read/written.
This combines to ~15-20% (pp) improvement in kernel runtime.
Signed-off-by: Jan Vesely jan.vesely@rutgers.edu