FLOSS virtualization hacker, occasional brewer

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Joined 1 year ago
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Cake day: June 9th, 2023

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  • QEMU is always going to focus on emulation fidelity first and there are few shortcuts. With floating point the differences aren’t generally in the numbers but in how the NaNs and other edge cases are handled. If you want to execute FP heavy code you should be cross compiling anyway.




  • Pretty much. From v8.0 onwards all the extra features are indicated by id flags. Stuff that is relevant to kernel mode will generally be automatically handled by the kernel patching itself on booting up and in user space some libraries will select appropriately accelerated functions when the ISA extensions are probed. There are a bunch off advisory instructions encoded in the hint space that will be effectively NOPs on older hardware but will enhance execution if run on newer hardware.

    If you want to play with newer instructions have a look at QEMUs “max” CPU.











  • Alex@lemmy.mltoLinux@lemmy.ml*Permanently Deleted*
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    7 months ago

    It’s a web of trust. If the package maintainer is doing due diligence they should at least be aware how the upstream community runs. If it’s a one person passion project then it’s probably possible to give the changelog and diffstata once over because things don’t change that fast. Otherwise they are relying on the upstream not shipping broken stuff.


  • Alex@lemmy.mltoLinux@lemmy.mlLinux for Kids?
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    7 months ago

    I just installed Ubuntu for my 11 year old and they could use it fine. Didn’t bother with any parental controls on the device itself (although I can ssh in if needed) because the network deals with filtering at a DNS level.