[petsc-dev] [GPU] Performance on Fermi

[Keita Teranishi]

Yes, I replaced all the compiler flags by -O3.

================================
 Keita Teranishi
 Scientific Library Group
 Cray, Inc.
 keita at cray.com
================================


-----Original Message-----
From: Jed Brown [mailto:five9a2 at gmail.com] On Behalf Of Jed Brown
Sent: Friday, August 27, 2010 4:16 PM
To: Keita Teranishi; For users of the development version of PETSc
Subject: Re: [petsc-dev] [GPU] Performance on Fermi

On Fri, 27 Aug 2010 16:06:30 -0500, Keita Teranishi <keita at cray.com> wrote:
> Barry,
> 
> The CPU timing I reported was after recompiling the code (I removed PETSC_USE_DEBUG and GDB macros from petscconf.h).  

Unless you were manually overriding compiler flags, it still wasn't
optimized.  Please just reconfigure a new PETSC_ARCH --with-debugging=0.
It's as easy as

  foo-dbg/conf/reconfigure-foo-dbg.py --with-debugging=0 PETSC_ARCH=foo-opt
  make PETSC_ARCH=foo-opt

Jed