PerfView's Metric/Interval greater than 1?

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According to some PerfView material that I have seen/read online, I should dig into further CPU investigation if the Metric/msec is close to 1 (ex: 0.92), but I am seeing that in my case this value is 10.62. What does this mean?

Totals Metric: 218,443.0 Count: 218,443.0 First: 353.835 Last: 20,927.284 Last-First: 20,573.449 Metric/Interval: 10.62 TimeBucket: 686.0 TotalProcs 12

From Last-First, I can see that the profiling was done for 20,573 milliseconds, but the Metric is 218,443 samples. How come? Since PerfView takes one sample every 1 millisecond, I should not have seen this value greater than 20,573, right?

Is this count so high because the Metric here from ALL those 12 processors? If yes, so should I do the calculation like (218443/12)/20573, which gives me 0.88?

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