Hi, please take a look at "VMmark 2.5 Benchmark Scoring Methodology" and "VMmark Results Files" in the VMmark Benchmarking guide.
Here's a summary.
P0, P1, P2:
The VMmark measurement time period is broken down into three phases: P0, P1 and P2. P0 is the first third of data measurement, P1 the middle third, P2 the last third. Each phase is 40 minutes long.
Actual:
May refer to the throughput (operations per second) for each application workload. This term isn't currently in use, in favor of "Scores".
Ratios:
These are the normalized scores as described in "VMmark 2.5 Benchmark Scoring Methodology". A score of 1.00 means that workload performance was equivalent to an example test system performance.
QoS:
Quality of Service (QoS) is also known as "Application latency". This is a measure of the length of time in milliseconds that it takes for each client's request to be completed.
GM:
I think you are referring to Geometric Mean. We compute the geometric mean of the per-workload Ratios as the final score for each tile.
I hope this answers your question.
Rebecca