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performance: 0.982
graphic: 0.802
device: 0.801
semantic: 0.617
other: 0.399
permissions: 0.351
files: 0.332
debug: 0.323
boot: 0.307
network: 0.289
PID: 0.278
socket: 0.272
vnc: 0.236
KVM: 0.065
x86 (32-bit) multicore very slow, but x86-64 is fast (on macOS arm64 host)
Description of problem:
More cores doesn't slow down a x86-32 guest on an x86-64 host, nor does it slow down an x86-64 guest on an arm64 host. However, adding extra cores massively slows down an x86-32 guest on an arm64 host.
Steps to reproduce:
1. Run 32-bit guest or 32-bit installer
2.
3.
I have replicated this over several OSes using homebrew qemu, source-built qemu and UTM. This is not to be confused with a different bug in UTM that caused its version of QEMU to be slow.
This also seems to apply to 32-bit processes in an x86-64 guest.
Additional information:
https://github.com/utmapp/UTM/issues/5468
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