2009 Update

[Peter Chubb]

>>>>> "Anton" == Anton Shterenlikht <mexas at bristol.ac.uk> writes:

Anton> On Sat, Nov 07, 2009 at 05:26:27PM -0500, "C. Bergström" wrote:

Anton> There are 6 ia64 systems on top500 list (details below). All
Anton> run linux, of course. But these organisations must use very
Anton> good compilers, and, at least for nuclear codes (systems 71 and
Anton> 96), these will be f90-f95 or even f2003 (I don't know of any
Anton> f2008) compilers. Perhaps they do use PathScale and forget
Anton> about GCC..

Most use the Intel compiler, and heavy hand-optimization of inner
loops using tools like vTune.

Gelato put a lot of effort into imprving gcc for IA64 -- gcc 4.x is
miles better than gcc 3.x -- but there's still a lot that could be done
with low-level instruction scheduling.

Peter C

--
Dr Peter Chubb		www.nicta.com.au    peter DOT chubb AT nicta.com.au
http://www.ertos.nicta.com.au           ERTOS within National ICT Australia