Myriam : Thanks for your effort. It will help us improve PETSc. Hong Hi all,
I used the wrong script, that's why it diverged... Sorry about that. I tried again with the right script applied on a tiny problem (~200 elements). I can see a small difference in memory usage (gain ~ 1mB). when adding the -mat_freeintermediatestructures option. I still have to execute larger cases to plot the scaling. The supercomputer I am used to run my jobs on is really busy at the moment so it takes a while. I hope I'll send you the results on Monday. Thanks everyone, Myriam Le 04/11/19 à 06:01, Jed Brown a écrit : > "Zhang, Hong" <hzh...@mcs.anl.gov<mailto:hzh...@mcs.anl.gov>> writes: > >> Jed: >>>> Myriam, >>>> Thanks for the plot. '-mat_freeintermediatedatastructures' should not >>>> affect solution. It releases almost half of memory in C=PtAP if C is not >>>> reused. >>> And yet if turning it on causes divergence, that would imply a bug. >>> Hong, are you able to reproduce the experiment to see the memory >>> scaling? >> I like to test his code using an alcf machine, but my hands are full now. >> I'll try it as soon as I find time, hopefully next week. > I have now compiled and run her code locally. > > Myriam, thanks for your last mail adding configuration and removing the > MemManager.h dependency. I ran with and without > -mat_freeintermediatedatastructures and don't see a difference in > convergence. What commands did you run to observe that difference? -- Myriam Peyrounette CNRS/IDRIS - HLST --
