Hi Alan, 2014-10-12 20:36, Alan Carew: > The following patches add two DPDK sample applications and an alternate > implementation of librte_power for use in virtualized environments. > The idea is to provide librte_power functionality from within a VM to address > the lack of MSRs to facilitate frequency changes from within a VM. > It is ideally suited for Haswell which provides per core frequency scaling. > > The current librte_power affects frequency changes via the acpi-cpufreq > 'userspace' power governor, accessed via sysfs.
Something was preventing me from looking deeper in this big codebase, but I didn't know what sounds weird. Now I realize: the real problem is that virtualization transparency is broken for power management. So the right thing to do is to fix it in KVM. I think all this patchset is a huge workaround. Did you try to fix it with Qemu/KVM? -- Thomas
