[petsc-users] -pc_asm_type none

[Barry Smith]

> On Nov 5, 2016, at 9:35 PM, Fande Kong <fdkong.jd at gmail.com> wrote:
> 
> Hi All,
> 
> I know what "basic", "restrict" and "interpolate" represent, but have no idea about "none". Anybody knows what does mean when using "-pc_asm_type none"?

 PC_ASM_NONE         - Residuals from ghost points are not used, computed ghost values are
$                        discarded.
$                        Not very good.

  In the P (A_subdomain)^-1 R  both the R and the P skip values in the overlap region. Sort of the worst of restrict and interpolate. 


> 
> Regards,
> 
> Fande Kong,