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Old   March 19, 2018, 07:04
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Using the CUDA solver, I see the following info at each time step

Code:
Time = 10

cudaCG:  Solving for T, Initial residual = 9.9545596e-07, Final residual = 9.9545596e-07, No Iterations 0
ExecutionTime = 5.68 s  ClockTime = 5 s
I greped to see which part of the code prints that time. However, there are so many instances and I can not figure out which one is correct. Does anybody know?
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Old   March 19, 2018, 07:59
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The ExecutionTime is the time needed by the CPU for the iteration step and ClockTime is the "real" Time.
Further information can be found here: Difference between "ExecutionTime" and "ClockTime"
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Old   March 19, 2018, 13:55
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OK. But I would like to know which source file is used for printing that information. As I said, there are multiple instances in the source folder.


Also, from you explanation I think ClockTime should be bigger than ExecutionTime. But I see the inverse. Can you explain more?
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Old   March 20, 2018, 03:00
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From my observation the ClockTime is allways a whole number, while ExecutionTime gives the exact fractions. Also ExecutionTime can be smaller or larger (by a few fractions) than the ClockTime.

The printout is from solver.C:
Code:
        Info<< "ExecutionTime = " << runTime.elapsedCpuTime() << " s"
            << "  ClockTime = " << runTime.elapsedClockTime() << " s"
            << nl << endl;
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