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0 pointskllrnohj1y ago0 comments

What are you doing where you see anything remotely close to double-digit-% gains from disabling spectre mitigations?

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5 comments · 3 top-level

AHTERIX50001y ago· 1 in thread

If mitigations include disabling SMT and the workload is compiling code, then the difference is easily in double digits.

kllrnohjOP1y ago

What OS ships the mitigation of disabling SMT by default? Surely they just meant things like the retpoline mitigations in syscalls?

iforgot221y ago· 1 in thread

Video editing maybe? Which is not going to involve running untrusted code.

kllrnohjOP1y ago

It's not going to hammer on syscalls, either, so it won't have any spectre-related regressions.

umvi1y ago

my specific use case where I see significant performance improvement is image segmentation pipelines (which involve opencv-style image processing and AI inference). YMMV depending on your CPU I suppose.

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