Hi, community,

I was doing some benchmark tests for my version of GRHydro with TimerReport and I found that a lot of time in the code is spent in SYNCs for the staggered variables. Analogous to IllinoisGRMHD I have the following lines in the schedule.ccl

{
SYNC: GRHydro::em_Ax,GRHydro::em_Ay,GRHydro::em_Az,GRHydro::em_psi6phi
LANG: C
} "Schedule symmetries -- Actually just a placeholder function to ensure prolongations / processor syncs are done BEFORE outer boundaries are updated."

According to the timer, this takes 3 times more than other SYNCs. Is there a reason for this? Is it related to the prolongation operators for staggered variables?

Thanks for your help!

Dr. Luciano Combi

Postdoctoral Researcher

Perimeter Institute for Theoretical Physics

CITA National Fellow (U. of Guelph)

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