Performance Counter maximum during interval?

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Performance Counter maximum during interval?

I have an application that is executing a number of operations. I have some performance counters that measure the average time it takes to execute the operation between intervals. I would like a counter that for each interval will display the maximum time that it took to handle one of the operations since the last interval.

For an average I use a PerformanceCounter of type AverageTimer32 instance and an AverageBase instance. What kind of performance counter would I use for tracking the maximum operation time between intervals? How would it be incremented?

+1 A:

There is no such counter type. Trying to implement your own (read current value, compare, change if is a new max) is flawed under concurency conditions as there is no atomic interlockedcompareexchange API for performance counter.

Remus Rusanu 2009-12-18 19:29:36

Does that mean implementing something like this is not possible?

spoon16 2009-12-18 19:33:23

You can use an variable that tracks the max value and is incremented under appropiate locking, and publish it as an ordinary absolute counter.

Remus Rusanu 2009-12-18 21:09:09

It doesn't seem like that is really an option. You can't tell when the last interval is taken so you can't keep track of the max since the last interval.

spoon16 2009-12-18 23:36:20

You keep track of max since the application start up time. Or you keep a series in the application and manage it your self and publish a counter as 'max in the last 60 seconds' for example. A max between the intervals *for each reader* is impossible, it means the perf counters need to keep track of readers, which is not how counters work, all they have is *one* single raw value, the rest is computed by the readers

Remus Rusanu 2009-12-18 23:45:23

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Performance Counter maximum during interval?

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