Runtime: how about increasing it

[BlindFreddie]

OldChap: I run my card with lots of concurrent wu's to increase my runtime

[EDIT: The following is incorrect, as pointed out below by Snow Crash & wplachy [/Edit]

Only CPU runtime is counted, not GPU runtime.
While the GPU is crunching an individual WU, the CPU is only spending a low % feeding it, so it's not incrementing its runtime tally much at all. You're running more tasks than when doing CPU WUs, but the total CPU run-time can only be as high as the number of CPU cores/threads times the elapsed time. There's no double-counting!

In fact, running GPU work you'll tally up less run-time than running CPU work, because with CPU work the CPU usage is at 100% 100% of the time, while with GPU work the CPU is often at less than 100% usage.

Hope I'm less confused now ...