Re: Inefficient barriers on solaris with sun cc

On Thu, Sep 25, 2014 at 9:34 AM, Andres Freund <andres(at)2ndquadrant(dot)com> wrote:
> Binaries compiled on solaris using sun studio cc currently don't have
> compiler and memory barriers implemented. That means we fall back to
> relatively slow generic implementations for those. Especially compiler,
> read, write barriers will be much slower than necessary (since they all
> just need to prevent compiler reordering as both sparc and x86 are run
> in TSO mode under solaris).
>
> Since my estimate is that we'll use more and more barriers, that's going
> to hurt more and more.
>
> I do *not* plan to do anything about it atm, I just thought it might be
> helpful to have this stated somewhere searchable.

To put that another way:

If there are any Sun Studio users out there who care about performance
on big iron, please send a patch to fix this...

--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company