<div dir="ltr">Hi<div><br></div><div><div><ol><li>As I understood from user manual, the “world†of processors is devided into number of “imagesâ€. Each “image†is devided into number of “poolsâ€. Each “pool†is devided into number of “bandsâ€. “PW†level depends on the least specified one of the previous four (i.e., if “band†is specified, then “PW†is automatically distributed over all processor available in each “bandâ€. If “pool†is the least specified parameter, then “PW†is automatically distributed over all processors available in each “poolâ€, and so on). Prcoessors of each “PW†is devided into number of “tasks†for 3D FFT. “Linear-algebra group†specifies number of processors that should not exceed number of processors availabel for each “PWâ€, right?<br></li><li>Are there guidelines for the best values for the different parameters (i.e., ni, nk, nb, ... etc), or I should test each problem individually?<br></li><li>If my understanding is correct, the user manual says “nd is set to 1 if ScaLAPACK is not compiled, it is set to the square integer smaller than or equal to half the number of processors of each poolâ€. But “nd†should not exceed “PWâ€; and “PW†can be smaller than “half the number of processors of each pool†using “ntâ€. If this case happens, will there be error? <br></li></ol></div><div>Regards</div><div><br></div>-- <br><div class="gmail_signature">Mohammed<br></div>
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