Tag samples with time as close as possible to the time they were taken #128
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This is a fix for #127 -- use the monotonic time for a sample as close as possible to the time the sample was taken. This seems sufficient to fix the issue; I'm not sure what the impact of the
Timestampbeing off is going to be. I think that's safe, because that timestamp is (again, I think) what's used to group/line up the samples across threads/tasks. But the monotonic time is used for lib op resolution.