[boardwaalk]

Couldn’t there be some flag on the thread that marks it as “P-core only”? Doesn’t seem hard. I don’t known Linux scheduler internals though.

[pantalaimon]

Threads already have an affinity bit mask where you can select which cores they can be scheduled on.

https://man7.org/linux/man-pages/man2/sched_setaffinity.2.ht...

[saagarjha]

Right but then you’d just have all processes with that flag all the time.

[pantalaimon]

Only if glibc decides to use AVX512 for memset and such. I’m not sure if that makes sense to begin with, but it could also not do that if it detects a heterogeneous CPU.