[petsc-users] Question about TaoLineSearchApply.

[Barry Smith]

   Also run with -log_summary and you’ll see the percentage of time in the line search and also in the various function evaluations. The time for the line search includes the time of the function and gradient evaluations IT does, while the time for the functions and gradients includes the time for ALL function and gradient evaluations.

   Barry

On May 25, 2014, at 8:12 AM, Ce Qin <qince168 at gmail.com> wrote:

> Thanks, Jason. That's what I need.
> 
> One more question, How many function and gradient evaluations one MT line search need?
> I'm doing geophysical inversion, function and gradient evaluation is very expensive, so I want to minimize the function calls. Do you have any suggestions?