Latency Output Question

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Hello All, I took a measurement with an 4k workload with a 90% mixture of
reads and 10 % writes.

The latency output in the test result is:

Read lat avg=490.27
Write lat avg=191.78

Is this the correct way to calculate the latency? 490+192 is 682, and then
682/2?

Or, do I need to account for the 90/10 distribution when I calculate
latency?

Alos, is there a way to just get one average latency output, instead of a
separate one for read, and write?
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