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| author | Christian Krinitsin <mail@krinitsin.com> | 2025-07-17 09:10:43 +0200 |
|---|---|---|
| committer | Christian Krinitsin <mail@krinitsin.com> | 2025-07-17 09:10:43 +0200 |
| commit | f2ec263023649e596c5076df32c2d328bc9393d2 (patch) | |
| tree | 5dd86caab46e552bd2e62bf9c4fb1a7504a44db4 /results/scraper/fex/668 | |
| parent | 63d2e9d409831aa8582787234cae4741847504b7 (diff) | |
| download | qemu-analysis-main.tar.gz qemu-analysis-main.zip | |
Diffstat (limited to 'results/scraper/fex/668')
| -rw-r--r-- | results/scraper/fex/668 | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/results/scraper/fex/668 b/results/scraper/fex/668 new file mode 100644 index 000000000..e6e17a928 --- /dev/null +++ b/results/scraper/fex/668 @@ -0,0 +1,12 @@ +clang -mcpu/tune=native doesn't pick up Snapdragon 865 correctly +This is causing atomics to be terrible loadstore acquire/release pairs for everything outside of the JIT. +Even clang 11 is effected by this. + +First step would have our cmake script check for this and explicit place cortex-a77 there. +Also -march=native isn't supported on ARM with clang, so the current cmake check does nothing. It needs -mcpu or -mtune. + +Second step would be to upstream changes to clang/llvm so it is picked up correctly. This way it can be supported on at least clang 12. + +Might also effect Snapdragon 850, so c630 is also slower? + +Causing pain with interpreter cmpxchg fallback unit tests. \ No newline at end of file |