21 ms·

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

by 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
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