942d9e8952
In the case of histogram statistics, the values are always sample counts; the unit instead applies to the bucket range. For example, halt_poll_success_hist is a nanosecond statistic because the buckets are for 0ns, 1ns, 2-3ns, 4-7ns etc. There isn't really any other sensible interpretation, but clarify this anyway in the Documentation. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>