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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/3467 | |
| parent | 63d2e9d409831aa8582787234cae4741847504b7 (diff) | |
| download | qemu-analysis-main.tar.gz qemu-analysis-main.zip | |
Diffstat (limited to 'results/scraper/fex/3467')
| -rw-r--r-- | results/scraper/fex/3467 | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/results/scraper/fex/3467 b/results/scraper/fex/3467 new file mode 100644 index 000000000..8fd72c862 --- /dev/null +++ b/results/scraper/fex/3467 @@ -0,0 +1,9 @@ +Optimize rep movs and rep stos +Decent number of games spent a decent amount of time in memcpy and memset. + +Stray's render thread spends 3% in a single block `rep movsb` memcpy. +Metal Gear Rising Revengeance top block is a `rep movsd` for 32-bytes (8 elements). + +`rep movsb` is the one that is worst off since we move byte-by-byte, achieving only 2.7GB/s instead of 17.5GB/s in my microbench. + +Probably want to implement ASIMD and SVE optimized variants in the dispatcher that we can dynamically branch to. For FEAT_MOPS devices we can keep the copy/set inline whenever we implement that. \ No newline at end of file |