"The issue has two components: rate of tick and whether all cores (processors) have identical values in their time-keeping registers. There is no promise that the timestamp counters of multiple CPUs on a single motherboard will be synchronized. In such cases, programmers can only get reliable results by locking their code to a single CPU."
The entry also mentions that hibernation can affect the counters. I wonder if power savings implementations that speed up or slow the CPU could also have an effect.
"The issue has two components: rate of tick and whether all cores (processors) have identical values in their time-keeping registers. There is no promise that the timestamp counters of multiple CPUs on a single motherboard will be synchronized. In such cases, programmers can only get reliable results by locking their code to a single CPU."
The entry also mentions that hibernation can affect the counters. I wonder if power savings implementations that speed up or slow the CPU could also have an effect.