search for: delay_for_missed_tick

The value of ACPI PM-Timer may be broken on save unless the timer mode is delay_for_missed_ticks. With other timer modes, vcpu->arch.hvm_vcpu.guest_time is always zero and the adjustment from its value is wrong. This patch fixes the saved value of ACPI PM-Timer: - don''t adjust the PM-Timer if vcpu->arch.hvm_vcpu.guest_time is zero. - consolidate calculations of PM-Timer to one...

...are updates to timer modes for different HVM guest OSes. There isn''t any documentation anywhere, but I tracked down the "timer_mode" xm domain config variable, and found the explanations of the different values in xen/include/public/hvm/params.h. It looks like the options are delay_for_missed_ticks (default, 0), no_delay_for_missed_ticks (1), no_missed_ticks_pending (2) and one_missed_tick_pending (3). I tested 0 and 1 so far. I saw good results on one domain that hadn''t had much skew in the first place, but the second one I tested was still a second fast soon after I created it...