new_ptsc 50 arch/x86/events/amd/power.c u64 prev_pwr_acc, new_pwr_acc, prev_ptsc, new_ptsc; new_ptsc 56 arch/x86/events/amd/power.c rdmsrl(MSR_F15H_PTSC, new_ptsc); new_ptsc 69 arch/x86/events/amd/power.c tdelta = new_ptsc - prev_ptsc;