'Where to find the Mathematics skills to calculate a lost time in resources usage?

In Disk usage If interval let name it A (6sec), and there's an activity that has throughput 10MBs ( low throughput due to contention with another activities) Then the activity jumped to 20MBs let name it interval B which is free of contention.

I'm trying to calculate the lost time in the contention interval (A) inside disk usage. Is it correct to do this Math. 20MBs / 10MBs = 2MBs -> A smaller than B

So, 6sec/2MBs = 3seconds -> lost in interval A due to the contention. Is that work right? if So where can I find the foundation Math related to that.

Best,

operating-systemquery-optimizationperformance-testingcpu-usagejavatime-complexitydepth-first-search


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