RDTSCP instruction triggers "illegal instruction" for Linux container on macOS #321
Description
OS: Big Sur (11.5.2)
We're trying to use RDTSC and RDTSCP on Core i9 chip for ns-scale perf measurement.
RDTSC works fine.
RDTSCP is supported by the processor based on the spec, but inside the container /proc/cpuinfo doesn't have rdtscp flag, and trying to use it will cause illegal instruction error.
My guess is it's an issue/limitation of VM in macOS itself.
But given there's almost no doc about it, we cannot get any meaningful conclusion.
Can moby side help with some investigation, to see if it's fixable within macOS's own virtualization framework API.
And if not, is it possible to introduce other VM options?