4 ms·

I never got this working myself, do you get 4 cores that run the native cores ? Running raspbian in Qemu seems slower than running on a real Pi, multicore woul

by stuaxo 9y ago

I never got this working myself, do you get 4 cores that run the native cores ? Running raspbian in Qemu seems slower than running on a real Pi, multicore would definitely help.

moyix 9y ago
Last I checked, QEMU does not run multiple cores concurrently. Similar to Python, it has a big lock that serializes execution (known as the "Big QEMU Lock", or BQL). So you should not expect speedups... However, there is an effort to change this: https://lwn.net/Articles/697265/ https://lwn.net/Articles/697265/ But I don't know if it has been merged yet.
- pm215 9y ago
  Yeah, that has hit upstream now. It needs support in both the frontend and the backend so only some host/guest combos will enable it, but arm-on-x86 should now multithread by default for smp guests.
- deleted 9y ago
  [deleted]